JPS5826974B2 - Crushed material particle shape adjustment method and particle shape adjustment device - Google Patents

Description

[Detailed Description of the Invention] Explanation of the Summary The invention of this application is a particle shape adjustment method in which the shape of a crushed material that has been subjected to a crushing action by a show crusher or the like is adjusted to a predetermined particle size, including particle size adjustment; And, the invention relates to a particle shape adjustment device directly used therefor, and in particular, a crushed material particle shape in which preferential grinding in a grinding section is regulated by discharge retention in a subsequent stage, and the retention and grinding are differentiated. This invention relates to an adjustment method and a particle shape adjustment device directly used therefor.

BACKGROUND ART Conventionally, in compression type crushers such as brake crushers, gyratory crushers, cone crushers, single trouble crushers, roll crushers, etc., materials to be crushed that are larger than the outlet gap are charged and crushed to a size that is smaller than the outlet gap. has the function and therefore
For example, it has been widely used to produce crushed materials as aggregate for civil engineering, construction, etc.

Although there are problems with the prior art, the compression type crusher has a good crushing effect on the material to be crushed that is above the outlet gap. Due to its mechanical limitations, the mechanism does not affect the grain shape adjustment or grain size adjustment mechanism, and may cause problems such as flattening, flaw length,
There was a drawback that many irregularly shaped fragments with sharp pointed protrusions were produced.

If the crushed material produced as described above is used as the concrete aggregate, etc., problems such as changes in the material gap during curing and sharp protrusions on the surface may occur. had the disadvantage of being unsuitable.

To deal with this, for example, to obtain a final product of about 40 to 5 mm, a so-called impact type crusher is used, and to obtain a final product of 5 mm or less, the impact type crusher is operated in a recycling manner. However, on the one hand, it is true that the particle shape can be adjusted by operating the seed wave bed mill, but on the other hand, it is difficult to control the operating force. There are disadvantages in that the liner is extremely large and expensive, and the liner is subject to heavy wear, which is disadvantageous in terms of maintenance, and the workability of repairing the liner is poor.

Furthermore, due to the mechanical and functional conditions of the wave layer crusher, extremely fine powder particles are produced during particle size adjustment, and therefore the product must be subjected to particle size adjustment during classification and sieving over multiple visits. There were also disadvantages.

Therefore, although attempts were made to improve the particle shape by trial and error by introducing the next product into the jaw crusher and gyratory crusher and allowing it to undergo the re-crushing process, as mentioned above, the type crusher was unable to discharge the product due to gravity. Since the granular product is designed to be easily carried out, the granular product below the exit gap is discharged in a free path and does not take part in the grinding process to improve the granule shape, which is meaningless.

Although some of the cone gyratory crushers of the Shilla disc type are equipped with a choke mechanism in the crushing chamber, the crushing and retention functions of these types of crushers are not differentiated, and therefore , the processing is pulsating, the crushing is not done smoothly, and
There was an inadequacy in that the particles were not ground together.

Purpose of the Invention The purpose of the invention of this application is to solve the problems of the irregular particle shape of the crushed material as a material for use based on the above-mentioned prior art and the problems of the grinding technology to deal with it, and to solve the problem of the primary crushing. The flattening, flaw length, and acute ridge shape obtained from the analysis of the particle shape of the object are detected, and the cubic shape adjustment by grinding them is achieved by sliding and pressing the crushed objects together, and the particle size distribution is Becoming properly also obtains secondary benefits, and the -
Next, we analyzed that the sliding contact pressure of the crushed material results in preferential grinding due to stagnation due to blockage in the discharge section, and the product discharge is intermittently discharged by the oscillating discharge surface that responds to the oscillation during non-gravity discharge. Moreover, it is an object of the present invention to provide a new method for adjusting the particle shape of crushed material, in which grinding is always carried out in a state where the primary crushed material is filled with the above-mentioned clogging, and a particle shape adjusting device directly used therefor. It is something.

Structure of the Invention In order to solve the above-mentioned problems, the structure of the invention of this application, which is based on the above-mentioned claims and in accordance with the above-mentioned object, is to introduce a crushed material between a pair of opposing grinding plates, and to At least one side is oscillated to expand or shorten the distance between them, and when the ejection part is stagnant when it is reduced, it is ground preferentially in a closed space, and the flaw length and sharp points of the crushed material are ground, and uniform particles are obtained. Then, with the grinding plate open, the ground material descends, is pressed by the surface of the rear grinding plate, and is discharged to the side, and the discharge function and stagnation function are balanced by the discharge plate directly beside it. Technical measures have been taken to ensure that

Embodiments Next, embodiments of the invention of this application will be described below with reference to the drawings.

The basic principle of the invention of this application is shown in FIGS. 1 to 4C, and in the plan explanatory views of FIGS. 1 and 2, FIG.
For example, this is a mode showing compression type processing for large-sized crushed materials, and a fixed grinding plate 3 and a back-and-forth oscillating grinding plate 4 are provided to the fixed side walls 1 and 2, and a closed space 5 serving as a grinding space is shown. is formed.

In addition, in the embodiment shown in FIG. 2, a mantle-shaped rotating and oscillating grinding plate 4 located within the cone-shaped fixed grinding plate 3 rotates to form a closed space 5 as a grinding space between the two. There is.

Accordingly, when the A-A cross section of the embodiment of FIGS. 1 and 2 is shown, the third
As shown in Figures a to 3e, the crushed material is introduced from the upper part F in the figure and discharged from the discharge section G, and the shapes of the grinding plates 3 and 4 are the grinding space 5 and the discharge space 6. Functionally, the grinding space 5 is open at the top to form a supply section, and the grinding space 5 has a narrow gap toward the bottom, and at least The grinding plate 4 is configured to swing and expand and contract the grinding space 5 intermittently.

The discharge section G is discharged sideways from the lower end of the grinding space 5 in a closed manner so that the crushed material to be processed in the grinding space does not fall and flow away continuously. The upper and lower flanges 8 and 9 as plates are formed in an optimal shape according to the processing conditions, but preferably a type that balances the discharge and stagnation functions as shown in Figs. 3c and 3e.

Of the flanges 8 and 9, the upper flange 8 is not necessarily the same size as the lower flange 9, and depending on conditions, a wide area or a substantially no area configuration is also possible.

Therefore, to explain the grinding action with respect to Figs. 4a, 4b, and 4c, for example, primary crushing that contains many irregularly shaped grains with flaw lengths and flatness that have been crushed to a predetermined particle size by a show crusher or a di-airy crusher. The material K is smoothly and quantitatively supplied from the upper and lower supply portions so that the grinding space 5 is always filled with the material K, and the state shown in FIG. 4a is obtained.

In this state, the grinding plate 4 on the right side of the figure swings to expand and contract the grinding space 5 in a pulsating manner.

Therefore, as shown in FIG. 4b, the grinding plate 4 is
When the grinding plate 3 presses the other grinding plate 3 obliquely in the upper left direction in the figure and the grinding space 5 is reduced, the filled crushed material K is compressed.

Therefore, as mentioned above, crushed materials that are subjected to compressive stress are flat,
Crushed materials with irregularly shaped grains with long scratches and sharp edges undergo preferential grinding through microscopic fracture, sliding contact, and crushing action at their weak points.

In this case, since block crushing is not performed as in the above-mentioned secondary crushing, but the weak parts of each crushed object are crushed, the power required is extremely small, and as a result, no fine powder is generated unnecessarily.

Next, when the grinding plate 4 retreats and the grinding space 5 expands, the ground material M, which has been ground and whose particle shape is adjusted three-dimensionally, descends to the discharge section G.

In this way, the above 4th a t 4 b t 40
While repeating the process shown in the figure, the ground material M that has descended to the discharge section G stays at an angle of repose relative to the horizontal lower flange 9 in the state shown in FIG. The downward flow of the crushed material K and the crushed material M is blocked.

Next, when the grinding plate 4 is pushed upward to the upper left in the figure, the ground material M retained on the lower flange 9 at the above-mentioned angle of repose as shown in the figure.
is thrown up by the lower flange 9, and is discharged out of the system in the transverse direction from the discharge section G during the retreating process of the grinding plate 4, as shown in FIG. 4c.

Therefore, while the ground material M is intermittently discharged from the discharge section G by the continuous repetition of the above-mentioned FIGS. 4a, 4b, and 4c, the ground material M in the grinding space 5 and the crushed material are 5 will be filled at all times.

Therefore, if the above-mentioned aspect is shown as an example in an actual machine,
5 and 6, and in the embodiment shown in FIG. 5, a mantle-shaped movable grinding plate 4 is provided inside the cone-shaped fixed grinding plate 3 and is linked to bevel gears 10 and 11. It is connected to a grinding swing mechanism 13 by an eccentric shaft 12,
Due to the action of the grinding swing mechanism 13, the mantle-shaped grinding plate 4 approaches and moves away from the fixed grinding plate 3, thereby expanding and contracting the grinding space 5.

Then, the lower flange 9, which is formed exactly horizontally, rises and falls above the needle with respect to the upper flange 8.

On the other hand, in the embodiment shown in FIG. 6, the oscillating grinding plate 4 facing the fixed grinding plate 3 expands and contracts the grinding space 5 by means of the pin shaft 16 due to the eccentric operation bar 14 and the trouble 15, and the The lower flange 9 formed in the upper flange 8 rises and falls obliquely upward.

In the embodiments shown in FIGS. 5 and 6, when the primary crushed material is supplied from the upper supply section 7 to a predetermined value, the fourth ay4
The repeated grinding process of primary crushed material, filling, grinding, lowering, splashing and discharging described for figures b and 4c is carried out in exactly the same way.

It goes without saying that the embodiments of the invention of this application are not limited to the above-mentioned two embodiments, and various embodiments can be adopted.

Effects of the Invention According to the invention of this application, the crushed material having many defective lengths, flattened particles, and irregularly shaped particles with protruding pointed edges due to compression crushing that has been primarily crushed by a crusher such as a show crusher or a gyratory crusher is discharged into the lower discharge space. - The discharge function and the grinding function are separated because the discharge function and the grinding function are separated, and the crushed materials come into contact with each other in the closed space. By grinding and crushing, weak points such as flat parts and pointed parts of the crushed product granules are ground, thereby making the grain shape average and three-dimensional, and making the grain shape of the whole crushed product uniform. Excellent effects can be achieved.

Furthermore, the discharge is not carried out by falling due to weight, but by the pressing action of the discharge surface, which causes the discharge to occur intermittently and intermittently, but the function of closing the closed space is always maintained.
The sliding grinding between the crushed objects in the closed grinding space acts as so-called preferential grinding, and the preferential grinding is repeated while descending through the grinding chamber as the discharge is interrupted. and the grinding is carried out continuously,
Finally, the average particle shape adjustment is completed, and a considerable amount of the product can be secured in the flow type.

Therefore, the above-mentioned preferential grinding is performed between the crushed pieces, and there is no direct pressure on the grinding surfaces, and the crushed pieces are rubbed together.
Since it is sliding contact grinding that involves compromise of weak points, no significant amount of fine powder is generated due to excessive crushing, and therefore the particle size distribution is also in an extremely favorable condition. Sieving has the effect of not only saving laborious man-hours, but also making it extremely useful as aggregate for civil engineering, construction, etc.

Furthermore, since the retention discharge plate is integrally extended sideways to the lower part of the grinding plate, it has the effect of being immediately deflected and discharged from the grinding plate, and the grinding plate has a swinging mechanism. If it is connected to the grinding cycle, it also has the effect of being discharged in conjunction with the grinding cycle.

In addition, the device also has a stagnation/discharge plate extending laterally from the lower end of the opposing grinding plate to balance discharge and stagnation, and a grinding oscillation that expands and contracts the narrow gap between the grinding plates. Since it is only necessary to arrange the mechanism on the grinding plate, the structure is simple, the production is easy and low cost, and the effect is that it is easy to operate and requires no maintenance.

[Brief explanation of drawings]

The drawings show embodiments of the invention of this application, and
, 2 is an explanatory plan view of the grain shape adjustment grinding space, 3a to 3e
The figures are 1 and 2 A-A cross-sectional explanatory diagrams, 4a to 4b,
Fig. 4c is an explanatory diagram of the grain shape adjustment grinding process, and Figs. 5 and 6 are explanatory diagrams of the grain shape adjustment device. K...Crushed material, 5...Closed space, G.
...Discharge space, 3, 4... Grinding plate, 7.
...Feeding section, 5... Grinding section, 8, 9...
...Discharge plate, 10-15...Swing mechanism.

Claims (1)

[Claims] 1. A method for reprocessing crushed material to adjust particle shape,
The crushed material is preferentially ground in the side closed space, and then the ground material remains in the lower discharge space 1, and is then discharged straight to the side by the discharge action of the rear surface, and the discharge in the discharge space is intermittently. A method for adjusting the particle shape of crushed materials, characterized in that the grinding space of the closed space is always filled with crushed materials. 2. In a particle shape adjustment mechanism having a grinding plate for crushed material, a pair of opposing grinding plates form an upper feeding section and a lower grinding section to form a downward narrow gap, and the pair of opposing grinding plates A retention and discharge plate is integrally provided extending laterally from at least the lower end of the lower end, and at least one of the grinding plates is attached to a grinding swing mechanism. A crushed material particle shape adjusting device characterized by: