JP4807637B2 - Method and apparatus for producing liquid flux - Google Patents

Description

The present invention relates to cutting of slabs produced by gas cutting or continuous casting of thick steel plates such as ordinary steel and special steel, and prevention of adhesion of dross (burrs, noro, etc.) generated when scarfing the surface. The present invention relates to a method and an apparatus for producing a liquid flux that is mixed with gas and serves as a base of a vaporized flux having a function of preventing dross from adhering.

Gas cutting methods include slab cutting produced by gas cutting of heavy steel or special steel or continuous casting by burning and oxidizing a combustible gas such as acetylene (C2H2) or propane (C3H6) with oxygen. It is used for. The gas cutting method has advantages such as high cutting speed, high efficiency, simple equipment, and low running cost. However, the biggest drawback of the gas cutting method is that the cut molten iron and the oxidation reaction dross adhere to and grow on the lower surface of the material to be cut. The dross that becomes such deposits is generally called burr or noro, and the dross removal work after cutting is heavy labor. The dross removal work in the conventional gas cutting work often relies on human naval tactics, and the actual situation is that a human rides on steel with residual heat after cutting and the cutting part is maintained with a hand grinder. Yes, it's hot, dirty and hard 3K work. In steel cutting manufacturers, processes such as material picking, unfolding and cutting are computerized by NC conversion of cutting machines, etc., and even non-experts can respond with short-term education and training, but depending on the conditions of steel type and thickness At the same time, it has not yet been possible to automate the cutting operation so that dross does not adhere by changing the pressure, flow rate, cutting speed and cutting preheating temperature of the combustion gas and oxygen. Furthermore, automation of dross removal work has been delayed, and robotization is difficult due to differences in steel types and cutting shapes. For this reason, conventionally, various cutting methods have been proposed in which dross does not adhere in the cutting work of thick plates. In addition, since the slab produced by continuous casting has surface defects, the part of the defects is removed by scarfing with combustion gas and oxygen, but there is a problem that dross reattaches to the slab surface after the removal. . In order to solve the above problems, the present inventor, as described in Japanese Patent Application No. 2007-287820 publication, uses a mixed flux obtained by appropriately mixing fluxes used for brazing or the like and pre-treating the mixed flux with alcohol or acetone. A gas that is mixed in a solvent such as 8 to 25% by weight, dissolved in a supercritical apparatus at a temperature of 300 to 400 ° C. and a pressure of 34.3 to 44.1 MPa to form a liquid flux, and gas is blown into the liquid flux to be vaporized. Invented vaporization flux for cutting.

Japanese Laid-Open Patent Publication No. 2005-199299 JP-A-1-133675 JP 2003-112239 A Japanese Patent Application No. 2007-287820

In the method of Patent Document 1, cutting is performed by increasing the pressure of combustion gas such as propane or acetylene or oxygen (1) the risk of gas leakage or explosion is increased, and (2) the pressure of combustible gas and oxygen is increased. It is possible to blow up high temperature dross, but as the material to be cut becomes thicker, the pressure of the combustion gas and oxygen also rises, and the viscosity of iron oxide (FeO, Fe2O3, Fe2O4) increases as the oxygen pressure increases. As a result, the fluidity of the cutting dross is lowered and it is easy to adhere to the cut surface. (3) Therefore, the cutting gas is cut using a wide crater while securing the route through which the cutting dross flows. As the amount of oxygen used increases, the basic unit of thick plate material decreases, (4) the surface roughness of the cut surface decreases, and (5) the cutting dross is firmly gas-welded to the lower surface of the thick plate Adhere Take time to remove the work Because there, (6) Since the cutting nozzle is enlarged radiant heat from workpiece tends heated enter the nozzle body, there are problems such as flashback or explosion.

In the method of Patent Document 2, high-viscosity iron oxide (FeO, Fe2O3, Fe2O4) contained in the cutting dross is formed not only on the lower surface of the material to be cut but also on the upper surface, and the upper surface is generally steel shot. Alternatively, it was removed by the sand shot method, and the lower surface was removed by a mechanical chipping machine, but complete removal was impossible.

In the method of Patent Document 3, there are problems such as (1) finally removed by human power, and (2) since the removal member is worn out, it takes time to replace consumables and maintain tools.

In the method of Patent Document 4, (1) a high-temperature and high-pressure apparatus is required, and the reaction time is long and not suitable for mass production. (2) Since the proof stress decreases when the metal material reaches 450 ° C. or higher, SCM440 or Tensile steel such as SNCM815 is used, but when treating acidic chemicals, the iron ions in the container are slightly dissolved and mixed in a solvent such as alcohol, so cut when mixed with the cutting gas as a vaporized flux. It becomes dross seeds and promotes dross adhesion. (3) Therefore, after the dissolution reaction, the inside of the container must be cleaned and troublesome such as rust prevention treatment is required. (4) High concentration liquid flux of 30% or more In order to manufacture the device, it is necessary to set the pressure in the apparatus to 60 MPa or more and the temperature to 500 ° C. or more, which requires an increase in the size of the apparatus and advanced safety measures.

Based on the above problems, the problems to be solved by the present invention are as follows: (1) The dross falls by its own weight from the cutting surface without applying a physical external force to the cutting dross; (2) A clean cut with few irregularities (3) Reduce the pressure of combustion gas and oxygen as much as possible to reduce the cutting width and improve the yield of the material to be cut, (4) Reduce consumption of combustion gas and oxygen and safe cutting (5) To make the liquid flux production method easy and safe, and to realize a method and apparatus for producing a high-concentration liquid flux.

The first solving means is that at least two kinds of atoms are bonded to each other among atoms such as alkali metal, alkaline earth metal, halogen, B, C, N, O, Si, P, S, Cl, Zn, and Se. This is a method for producing a liquid flux in which an electrolyte is dissolved in a container containing a solvent such as alcohol or acetone while applying a magnetic field and rotating the solvent.

In the second solution, at least two kinds of atoms are bonded to each other among atoms such as alkali metal, alkaline earth metal, halogen, B, C, N, O, Si, P, S, Cl, Zn, and Se. This is a liquid flux production method in which an electrolyte made in this manner is added little by little in a container containing a solvent such as alcohol or acetone, and dissolved while rotating by applying a magnetic field to increase the concentration of the electrolyte.

A third solution is a method for producing a liquid flux in which boron oxide (B2O3) is mixed in a solvent such as alcohol or acetone.

A fourth solution is sodium tartrate (HOOCCH (OH) CH (OH) COONa) or potassium tartrate (2KOOCCH (OH) CH (OH) COOK.H2O) or ammonium pyrophosphate (NH3H4P2O7) in a solvent such as alcohol or acetone. ) Or citric acid (HOOCCH2C (OH) (COOH) CH2COOH / H2) or succinic acid (HOOCCH2: CH2COOH) and either pyrophosphoric acid (H4P2O7), phosphoric acid (H3PO4) or potassium phosphite (K2PHO3) It is a manufacturing method of the liquid flux which mixed these.

The fifth solving means is a method for producing a liquid flux in which rotating blades are arranged in the container.

A sixth solution is a method for producing a liquid flux in which magnets are arranged in a 6-to-10-hedron on the side wall of the container.

A seventh solution is a method for producing a liquid flux in which the magnet is neodymium or samarium and the magnetic field strength in the container is 3000 gauss or more.

In the eighth solution, at least two kinds of atoms are bonded to each other among atoms such as alkali metal, alkaline earth metal, halogen, B, C, N, O, Si, P, S, Cl, Zn, and Se. This is a method for producing a liquid flux in which at least two kinds of liquid fluxes obtained by dissolving an electrolyte made in a solvent such as alcohol or acetone are mixed.

The effect of the first solution will be described. An electrolyte formed by combining at least two kinds of atoms among atoms such as alkali metal, alkaline earth metal, halogen, B, C, N, O, Si, P, S, Cl, Zn, and Se Decomposes into ions in a solvent such as alcohol or acetone. When a solvent or electrolyte is dissolved in such a solvent by applying a strong magnetic field, electrolysis occurs due to the induced current generated in the magnetic field, so electrolysis is performed at room temperature and normal pressure due to heat generation and electrolysis. A liquid can be made. Therefore, it has become possible to produce a liquid flux at a low cost and in a safe environment.

The effect of the second solving means will be described. If an electrolyte is put into a solvent (electrolytic solution) such as alcohol at a time, the van der Waals force, which is a weak intermolecular force, makes it difficult for atoms to dissolve even over a long time, so a 30% concentration cannot be made. It is possible to dissolve at a high concentration by adding a small amount with a quantitative feeder while stirring the solvent and electrolyte under a strong magnetic field. Since a strong magnetic field is applied to a minute capacity, it becomes easy to ionize by an electron impact force, and electrons in an electron pair orbit are most easily peeled off. Therefore, it is possible to decompose the electrolyte combined with hydrogen, which is the minimum electron.

The effect of the third solving means will be described. Alcohol solvents such as methanol have the property that the molar volume is minimized when 8 to 9% of water molecules enter, so that it is difficult to completely remove the water molecules, and those having a concentration of 100% are not commercially available. However, this moisture is an impurity and it is desired to remove it as a liquid flux. Therefore, by using boron oxide (B2OB), a reaction represented by the reaction formula B2O3 + 3H2O → 2H3BO3 (boric acid) occurs, moisture is removed, and boron (B) into boric acid serves as an antioxidant for the cut molten iron. Become.

The effect of the fourth solution will be described. In a solvent such as alcohol, sodium tartrate (HOOCCH (OH) CH (OH) COONa) or potassium tartrate (2KOOCCH (OH) CH (OH) COOK.H2O) or ammonium pyrophosphate (NH3H4P2O7) or citric acid (HOOCCH2C (OH ) (COOH) CH2COOH / H2) or succinic acid (HOOCCH2: CH2COOH) and mixing either pyrophosphoric acid (H4P2O7), phosphoric acid (H3PO4) or potassium phosphite (K2PHO3) Therefore, the liquid temperature is raised and it acts as a neutralizing agent.

The effect of the fifth solving means will be described. By rotating the solvent, the intermolecular bonding force of the electrolyte is disrupted by the turbulent and magnetic effects, and by rotating in the magnetomotive field, an electromotive force is generated by Fleming's law. The heat becomes heat and the effect of promoting the chemical reaction is born.

The effect of the sixth solving means will be described. By rotating the solvent by applying a magnetic force to the 6-decahedron container, the side wall of the container acts as a collision plate, so that the intermolecular binding force of the electrolyte is easily divided by the turbulent flow effect and the magnetic effect.

The effect of the seventh solving means will be described. The stronger the magnetic field strength of a magnet such as neodymium or samarium, the shorter the dissolution time of the electrolyte, and the higher the concentration of the electrolyte. Therefore, the next strength of the magnet is effectively at least 3000 gauss.

The effect of the eighth solving means will be described. Since the liquid flux component can be easily adjusted by appropriately selecting and mixing a plurality of types of liquid flux, it is possible to produce a liquid flux according to the purpose.

A manufacturing method and a manufacturing apparatus for manufacturing a liquid flux will be described with reference to FIGS. FIG. 1 is a longitudinal sectional view of the manufacturing apparatus 1. FIG. 2 is an AA cross-sectional view of the manufacturing apparatus 1.

The first solving means is that at least two kinds of atoms are bonded to each other among atoms such as alkali metal, alkaline earth metal, halogen, B, C, N, O, Si, P, S, Cl, Zn, and Se. This is a method for producing a liquid flux in which the electrolyte thus made is dissolved in a container 16 containing a solvent such as alcohol or acetone while applying a magnetic field and rotating the solvent.

Conventionally, boric acid (H3BO3) exhibits a flux function in a wide temperature range of 180 to 800 ° C., so trimethylyl borate ((CH3O) 3B) 60%, acetone (CH3COCH3) 30%, and methanol (CH3OH) 10% A liquid flux mixed with is commercially available. This liquid flux is vaporized and widely used for brazing as a vaporized flux. This is a product made as a hardener for plastics and applied as a brazing flux for welding. This is achieved by dissolving the solid flux in a solvent and applying it to the base material to remove and clean the oxide on the surface of the base material, or to activate during brazing to prevent the base material from being oxidized. It has a function to promote fluidity and spreadability. However, there was no function to prevent the adhesion of dross generated during the cutting operation. The conventional cutting method only removes the dross containing the completed oxide film by hardware after the end of cutting, and there is no technique for continuously removing the dross generated during the cutting operation in parallel with the cutting operation. .

However, in Japanese Patent Application No. 2007-287820 Hiroshi, by combining the components of the liquid flux, it is vaporized with the combustion gas, and mixed with the combustion gas and applied to the cutting as a vaporized flux. (1) Antioxidation and prevention of dross adhesion (2) Decreasing the melting point of the cutting dross by about 50 ° C to improve the fluidity of the cutting dross, (3) Decreasing the surface tension of the cutting dross, It became possible to prevent adhesion of dross. That is, by mixing the combustion gas and the vaporized flux and supplying them to the crater to cut the thick plate, it becomes possible to simultaneously realize the heat oxidation prevention of the cut surface and the removal of the oxide film while cutting.

As described in Japanese Patent Application No. 2007-287820, cutting surface improvement elements include H, B, C, N, O, F, Si, P, S, Cl, Zn, Br, I, K, etc. In this method, a steel plate is cut by mixing a compound in a combustion gas such as acetylene (C2H2) or propane (C3H6) as a constituent element of a vaporization flux. At the cut part of the thick plate, cutting surface improving elements (H, B, C, N, O, F, Si, P, S, Cl, Zn, Br, I, K, etc.) invade into the γ-iron. Phenomenon that lowers the melting point by forming a solid mold occurs. δ iron and α iron are body-centered cubic lattices, and the intermolecular gap is as small as 0.04 nm, so it is difficult to make interstitial solids. However, γ iron is a face-centered cubic lattice and the intermolecular gap is 0.11 nm. Since the size of the cut surface improving element is larger than the size of the molecule, the cut surface improving element easily penetrates. By the way, the molecular size of a typical cutting plane improving element is as follows: hydrogen (H) 0.037 nm, boron (B) 0.088 nm, carbon (C) 0.077 nm, nitrogen (N) 0.053 nm, oxygen (O ) 0.061 nm, which is smaller than the intergranular gap of γ iron, and is a size that easily penetrates into γ iron. In particular, atomic minimum size hydrogen and fluorine that easily reacts with other substances are easy to penetrate into γ-iron and are excellent cutting surface improving elements. By mixing the cutting surface improving element in the cutting gas and continuously intruding into the dross, γ iron, which is the main component of dross, can be made into a solid body, which lowers the melting point and improves the fluidity. Therefore, an effect of suppressing the dross from adhering to the cut surface is produced. However, H, B, C, N, O, F, S, P, Si, Br, I, K and the like, which are usually cutting surface improving elements, are harmful to iron unless the content is strictly controlled. That is, in order to improve the mechanical properties of steel materials, carbon is contained in an amount of 0.02 to 0.2% depending on the application, but other elements are not less than 0.04% in JIS, such as strength and elongation. It is better to reduce the amount to have an adverse effect. Therefore, in order to prevent these cut surface improving elements from remaining on the cut surface, the compound of the cut surface improving element in the liquid flux is 8 to 30% by weight.

The cutting surface improving elements B, C, P, S, Si, and Zn have an effect of improving the fluidity by lowering the melting point of dross and molten iron, and the dross and molten iron easily flow down from the cut surface of the thick plate. The compound containing these is preferably 10 to 35%.

Halogen gases such as F, Cl, Br, and I, which are elements for improving the cut surface, have the effect of reducing the surface tension of the dross and improving the fluidity to clean the cut surface. The compound containing these is desirably 20 to 50%. These halogen gases are mixed with the cutting gas and come into contact with the dross of molten iron, iron oxide, etc. on the cut surface to tear the intermolecular attractive force of iron, so other cutting surface improving elements such as carbon and sulfur , Silicon, zinc, hydrogen, boron, oxygen and the like are easily contained. F (fluorine), Cl (chlorine), Br (bromine), I (iodine), etc. exist in a scientifically stable state as fluorides, chlorides, bromides, and iodides, so they can be easily marketed. Cost is also cheap.

Since the cutting surface improving elements K, H, N, O, Na, and B function as fluxes that prevent the oxidation of dross, the cutting speed is improved and a clean cutting surface is obtained. The compound containing these is preferably 10 to 40%. The role of the flux consisting of K, H, N, O, Na and B is (1) to remove the oxide on the surface of the base material and keep it clean, (2) to promote the fluidity of the dross, (3) (4) To prevent dross from laminating and growing, lowering the melting point of dross and improving fluidity. The molten iron is K, Na, B, N is B2O3, H3BO3, KO2, NaO2, K2SiF6. By re-fluxing to P2O5 or the like, the dross is brazed to the dross, so that the dross is continuously connected in a band shape and gradually becomes heavier and falls by its own weight. This is not seen in conventional cutting, and the action of brazing dross and molten iron works simultaneously with cutting. For this reason, it falls as its own weight because it becomes one large strip. Due to the synergistic effect of halogen gas and vaporization flux, the effect of reducing the melting point of dross, the effect of improving the fluidity by reducing the surface tension, and the effect of preventing the droplets from spheroidizing because the intermolecular attractive force of the droplets are separated. Since the cutting proceeds like a single waterfall in which dross is continuous, the cutting width can be cut by about 20% thinner than before.

The present invention provides a method and a manufacturing apparatus for manufacturing a liquid flux as invented in Japanese Patent Application No. 2007-287820, at room temperature and normal pressure. Whether the electrolyte that is the basis of the liquid flux is easily dissolved in alcohol depends on the strength of the cation-anion hydrogen bond and the weakness of the cation-anion bond, both enthalpy and entropy. To do. These two are contradictory properties, but a slight difference between them determines the solubility of the electrolyte. The saturated solubility of the lysis solution is proportional to pressure and temperature. When the liquid flux dissolved at high temperature and high pressure is brought to room temperature, the compound in the saturated concentration is recrystallized, so that it is limited to dissolve at a concentration of up to 30%. The forces acting between atoms or molecules are determined by van der Waals forces, which are electrically neutral and separated from each other, and the centers of gravity of positive and negative charges of atoms or molecules are shifted. Therefore, since the electric dipole moment is attracted and stabilized between atoms or molecules, the solubility of the electrolyte at normal temperature and normal pressure is low. For example, taking seawater as an example, the maximum is 3.5%. However, if the electrolyte is rotated and stirred in a solvent such as alcohol or acetone while applying a strong magnetic field, it is electrolyzed by electromotive force (CHOH + HO → CO + 6H (+) + 6e (−)), and free electrons are generated by the oxidation reaction of the solvent. The atoms cut the C—H—O bond of the electrolyte, and the adsorbed methanol seeds repeatedly react with the functional hydroxyl group (—OH) on the solution side, thereby activating the reaction. Therefore, a trace amount of water in the solvent serves as a generated hydroxyl group in a strong magnetic field. Liquid flux can be produced by using a simple device that rotates around a magnet such as neody or samarium that emits magnetic lines of force in a fixed direction installed in a container with the force of a rotating blade of 10 to 200 rpm. It became. A plurality of magnets, such as neodymium and samarium, are arranged so that a strength of 3000 gauss or more is generated.

The electrolyte that is the basis of the liquid flux is composed of at least two kinds of atoms among atoms such as alkali metal, alkaline earth metal, halogen, B, C, N, O, Si, P, S, Cl, Zn, and Se. Is made by combining. Specifically, boric acid (H3BO3), boron oxide (B2OB), trimethylyl borate ((CH3O) 3B), acidic potassium fluoride (KHF2), potassium borofluoride (KBF4), tetrafluoroboric acid (HBF4), potassium silicofluoride (K2SiF6), triphene phosphate ((C6H5O) 3PO), phosphoric acid (H3PO4), dipotassium phosphite (K2PHO3), tetraethoxysilane ((C2H5O) 4Si), tetramethylsilane ((CH3) Si), silicon Examples include potassium fluoride (K2SiF6) and alkoxide compounds.

In the prior art, the dispersion force (van der Waals interaction) of the liquid flux in which the electrolyte is dissolved in a solvent such as alcohol or acetone has no direction and acts uniformly on the surroundings. In order to have a spherical shape, which is the smallest body possible, it required a large amount of pressure and heat energy for melting. In the present invention, an alcohol-dissolved solution is rotated and stirred in a strong magnetic field zone, and a magnetic field of a minimum of 3000 gauss is applied to a turbulent fluid, whereby molecular bonds are decomposed and separated into (+) and (−) ion electrons. Therefore, electrolysis occurs due to the induced current generated in the rotating magnetic field, and it becomes possible to produce an electrolytic solution, that is, a liquid flux at normal temperature and normal pressure by heat generation and electrolysis.

In the second solution, at least two kinds of atoms are bonded to each other among atoms such as alkali metal, alkaline earth metal, halogen, B, C, N, O, Si, P, S, Cl, Zn, and Se. This is a liquid flux manufacturing method in which an electrolyte made in this manner is added little by little in a container 16 containing a solvent such as alcohol or acetone, and dissolved while rotating by applying a magnetic field to increase the concentration of the electrolyte.

If an electrolyte combined with hydrogen is introduced into a solvent (electrolytic solution) such as alcohol at once, the van der Waals force, which is a weak intermolecular force, makes it difficult for atoms to dissolve even over a long period of time, so that it becomes, for example, 30% or more. A high concentration liquid flux cannot be made. It becomes possible to dissolve at a high concentration only by adding a small amount with a quantitative feeder while rotating and stirring the solvent and electrolyte under a strong magnetic field. Since a strong magnetic field is applied to a minute capacity, it becomes easy to ionize by an electron impact force, and electrons are most easily peeled off, so that an electrolyte combined with hydrogen, which is the smallest electron, can be decomposed.

A third solution is a method for producing a liquid flux in which boron oxide (B2O3) is mixed in a solvent such as alcohol or acetone.

A fourth solution is sodium tartrate (HOOCCH (OH) CH (OH) COONa) or potassium tartrate (2KOOCCH (OH) CH (OH) COOK.H2O) or ammonium pyrophosphate (NH3H4P2O7) in a solvent such as alcohol or acetone. ) Or citric acid (HOOCCH2C (OH) (COOH) CH2COOH / H2) or succinic acid (HOOCCH2: CH2COOH) and either pyrophosphoric acid (H4P2O7), phosphoric acid (H3PO4) or potassium phosphite (K2PHO3) It is a manufacturing method of the liquid flux which mixed these.

In a solvent such as alcohol, in a solvent such as alcohol or acetone, sodium tartrate (HOOCCH (OH) CH (OH) COONa) or potassium tartrate (2KOOCCH (OH) CH (OH) COOK.H2O) or ammonium pyrophosphate (NH3H4P2O7) Alternatively, either citric acid (HOOCCH2C (OH) (COOH) CH2COOH / H2) or succinic acid (HOOCCH2: CH2COOH) is mixed and either pyrophosphoric acid (H4P2O7), phosphoric acid (H3PO4) or potassium phosphite (K2PHO3) By mixing, the liquid temperature is raised and it acts as a neutralizing agent.

A fifth solution is a method for producing a liquid flux in which the rotating blades 4 are disposed in the container 16. The rotating blade 4 is disposed at the center of the container 16 and the solvent is rotated and stirred at 10 to 200 rotations. In addition, when a solvent or electrolyte rotates in an electromotive field, an electromotive force is generated according to Fleming's law, and the electromotive force is converted into heat to accelerate a chemical reaction.

A sixth solution is a method for producing a liquid flux in which the magnets 6 are arranged in a 6-to-10-hedron on the side wall of the container 16. By rotating the methanol solution by applying a magnetic force to the 6 to 10-sided container 16, a solvent such as alcohol collides with the wall of the 6 to 10-sided container 16, thereby generating secondary turbulence and generating a turbulent flow. The liquid flux for the vaporized flux can be efficiently produced by the reaction and mechanical division acting in parallel.

A seventh solution is a method for producing a liquid flux in which the magnet 6 is neodymium or samarium, and the magnetic field strength of the magnet 6 in the container 16 is 3000 gauss or more. The vaporization flux due to magnetic force is an application that has been experienced in JP-A-63-12357 (gas shielded arc welding method) and JP-A-64-77743 (an apparatus for improving liquid fuel). The size was 3000 to 4000 gauss. In the present invention, if the magnetic field strength is at least 3000 gauss, it is possible to dissolve the electrolyte while rotating and stirring in a solvent such as alcohol or acetone. However, in order to shorten the dissolution time, the magnetic field strength should be strong. . For example, if the magnetic field is about 60000 gauss, the time required to produce about 1 liter of liquid flux is about 0.5 hours.

In the eighth solution, at least two kinds of atoms are bonded to each other among atoms such as alkali metal, alkaline earth metal, halogen, B, C, N, O, Si, P, S, Cl, Zn, and Se. This is a method for producing a liquid flux in which at least two kinds of liquid fluxes obtained by dissolving an electrolyte made in a solvent such as alcohol or acetone are mixed. The electrolyte is commercially available as various chemicals and may be appropriately selected depending on the application. These electrolytes can be dissolved by rotating and stirring while applying a magnetic field in a solvent such as alcohol or acetone, and the produced liquid flux can be mixed depending on the application. For example, there are boric acid (H 3 BO 3), boron oxide (B 2 OB), trimethyl borate ((CH 3 O) 3 B) and the like as electrolyte chemicals that play an antioxidant role. Examples of chemicals that remove and clean the surface tension include acidic potassium fluoride (KHF2), potassium borofluoride (KBF4), and tetrafluoroboric acid (HBF4). As chemicals that lower the melting point and clean the cut surface, potassium silicofluoride (K2SiF6), triphene phosphate ((C6H5O) 3PO), phosphoric acid (H3PO4), dipotassium phosphite (K2PHO3), tetraethoxysilane ( (C2H5O) 4Si), tetramethylsilane ((CH3) Si), and the like. By mixing several kinds of liquid flux obtained by dissolving a single electrolyte in a solvent such as alcohol or acetone, a liquid flux corresponding to a predetermined application can be produced.

The process for producing the liquid flux will be described with reference to FIGS. The cutting pulse motor 2 is rotated, and a maximum of 5 g of electrolyte is charged into the container 16 once every 2 to 5 seconds from the quantitative mixer 3. The material of the container 16 is suitably austenitic stainless steel such as SUS304 or SUS316L. The container 16 contains alcohol such as methanol as a solvent, and is agitated by rotating the rotary blade 4 at 10 to 200 rpm by the rotation pulse motor 5. As the rotation pulse motor 5, for example, a Bayer cyclomotor having an output of about 0.4 kW can be used. The shaft 4 a of the rotary blade 4 is sealed by a seal 17 and is exposed to the outside of the container 16. The rotary blade is supported by rotation by a bearing 18. A magnet 6 such as neodymium is fixed by a magnet holder 7. The magnet holder is made of a non-magnetic material such as resin, aluminum, or SUS304. The magnetic field strength of the magnet 6 needs to be 3000 gauss or more. However, in order to efficiently produce the liquid flux by shortening the dissolution time of the electrolyte, the magnetic field strength of 60000 gauss or more is desirable. The magnet holder 7 is lined on the container 16 so as to be a 6 to 10-hedron. Four to ten magnets 6 are attached to each surface of the magnet holder 7 in the longitudinal direction, but in FIG. The outer surface of the magnet 6 is coated with a resin 8 to prevent rust. The reason why the magnet holder 7 is lined in a polyhedron of 6 to 10 inside the container 16 is to give a role of a collision plate in order to stir the solvent and the electrolyte in a turbulent flow. The electrolyte is cut from the quantitative feeder 3 little by little from the hopper 9 into the solvent rotating at a low speed by the stirring pulse motor 5. When a maximum of 5 g is dropped at a rate of once every 2 to 5 seconds due to natural fall and forced fall, the rotation pulse motor 5 stops for 1 to 2 minutes and rotates while observing the reaction state in the container 16 from the viewing window 10. The speed of the pulse motor 5 is adjusted with the handle 5a. The gas generated while the electrolyte is dissolved is released to the atmosphere through the exhaust cylinder 15. Since the reaction is completed in about 30 minutes, when it is confirmed that the reaction state is completed from the viewing window 10, the thumbscrew 12 is removed and the lid 11 is removed. In order to collect the liquid flux in the container 1, the thumbscrew 14 is removed, the container 1 is lifted by the handle 13, and the liquid flux is extracted while being tilted.

An example of mixing liquid flux is shown below.

In the composition ratio of the electrolyte in the liquid flux 1000CC, acidic potassium fluoride (KHF2) is 200 CC (weight ratio 15%), potassium borofluoride (KBF4) is 100 CC (weight ratio 8%), and boric acid (H3BO3) is 300 CC (weight ratio). The weight ratio of 20%), potassium silicofluoride (K2SiF6) as 100CC (weight ratio of 8%) and pyrophosphoric acid (H4P2O7) as 300CC (weight ratio of 15%) were obtained. When this liquid flux was vaporized with propane gas and a cutting test was performed on a 500 mm thick steel plate, the state of dross non-adherence was observed.

In the composition ratio of the electrolyte in the liquid flux 1000CC, acidic potassium fluoride (KHF2) is 200CC (weight ratio 15%), potassium borate (KBF4) is 100CC (weight ratio 8%), and boron oxide (B2O3) is 300CC (weight). Ratio of 20%), potassium silicofluoride (K2SiF6) as 100CC (weight ratio 8%), pyrophosphoric acid (H4P2O7) as 300CC (weight ratio 15%), and the elemental mixture ratios shown in Table 2 were obtained. When this liquid flux was vaporized with propane gas and a cutting test was performed on a 500 mm thick steel plate, the state of dross non-adherence was observed.

In the mixing ratio of the electrolyte in the liquid flux 1000CC, acidic potassium fluoride (KHF2) is 200CC (weight ratio 15%), potassium borate (KBF4) is 100CC (weight ratio 8%), boric acid (H3BO3) is 300CC (weight ratio). 20%), potassium silicofluoride (K2SiF6) was 100 CC (weight ratio 8%), and triphenyl phosphate ((C5H5O) 3PO) was 300 CC (weight ratio 50%), and the element compounding ratios shown in Table 2 were obtained. When this liquid flux was vaporized with propane gas and a cutting test was performed on a 500 mm thick steel plate, the state of dross non-adherence was observed.

FIG. 3 is a longitudinal sectional view of a container. FIG. 3 is a cross-sectional view of the container taken along line AA.

Explanation of symbols

1: Manufacturing device, 2: Cutting pulse motor, 3: Fixed mixer, 4: Rotating blade, 4a: Shaft, 5: Rotating pulse motor, 5a: Handle, 6: Magnet, 7: Magnet holder, 8: Resin, 9: hopper, 10: viewing window, 11: lid, 12: thumbscrew, 13: handle, 14: thumbscrew, 15: exhaust pipe, 16: container, 17: seal, 18: bearing

Claims (7)

Alcohol, alkaline earth metal, halogen, B, C, N, O, Si, P, S, Cl, Zn, an electrolyte formed by combining at least two types of atoms among alcohols A method for producing a liquid flux, comprising applying a magnetic field in a container containing a solvent of water or acetone and dissolving the solvent while rotating. An electrolyte formed by combining at least two kinds of atoms among atoms of alkali metal, alkaline earth metal, halogen, B, C, N, O, Si, P, S, Cl, Zn, and Se, 2. The method for producing a liquid flux according to claim 1, wherein the concentration of the electrolyte is increased by adding the solution little by little in a container containing a solvent of alcohol or acetone, applying a magnetic field and dissolving while rotating. Claim 1 or claim 2 method of manufacturing a liquid flux, wherein in that a mixture of boron oxide (B2 O3) in an alcohol or acetone solvent. In an alcohol or acetone solvent, sodium tartrate (HOOCCH (OH) CH (OH) COONa) or potassium tartrate (2KOOCCH (OH) CH (OH) COOK.H2O) or ammonium pyrophosphate (NH3H4P2O7) or citrate HOOCCH2C (OH ) (COOH) CH2COOH / H2) or succinic acid (HOOCCH2: CH2COOH) and either pyrophosphoric acid (H4P2O7), phosphoric acid (H3PO4) or potassium phosphite (K2PHO3) The method for producing a liquid flux according to claim 1, claim 2, or claim 3. The method for producing a liquid flux according to claim 1, claim 2, claim 3, or claim 4, wherein a rotating blade is disposed in the container. 6. The liquid flux manufacturing method according to claim 1, wherein the neodymium or samarium magnets are arranged in a 6- to 10-hedron on the side wall of the container. . The method for producing a liquid flux according to claim 6, wherein the magnetic field strength of the neodymium or samarium magnet is 3000 gauss or more.

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