JPS6156286B2 - - Google Patents
Info
- Publication number
- JPS6156286B2 JPS6156286B2 JP2420183A JP2420183A JPS6156286B2 JP S6156286 B2 JPS6156286 B2 JP S6156286B2 JP 2420183 A JP2420183 A JP 2420183A JP 2420183 A JP2420183 A JP 2420183A JP S6156286 B2 JPS6156286 B2 JP S6156286B2
- Authority
- JP
- Japan
- Prior art keywords
- carbide
- alkali
- weight
- melting point
- low melting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000000203 mixture Substances 0.000 claims description 25
- 238000002844 melting Methods 0.000 claims description 23
- 230000008018 melting Effects 0.000 claims description 22
- 230000005496 eutectics Effects 0.000 claims description 20
- 239000002245 particle Substances 0.000 claims description 8
- 239000005997 Calcium carbide Substances 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 7
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 6
- 150000002222 fluorine compounds Chemical class 0.000 claims description 5
- 229910001618 alkaline earth metal fluoride Inorganic materials 0.000 claims description 3
- 239000011230 binding agent Substances 0.000 claims description 3
- 229910000287 alkaline earth metal oxide Inorganic materials 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- 238000010298 pulverizing process Methods 0.000 claims 1
- 239000003513 alkali Substances 0.000 description 24
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 18
- 238000006477 desulfuration reaction Methods 0.000 description 16
- 230000023556 desulfurization Effects 0.000 description 16
- 229910000272 alkali metal oxide Inorganic materials 0.000 description 14
- 239000003795 chemical substances by application Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000002156 mixing Methods 0.000 description 4
- 229910004261 CaF 2 Inorganic materials 0.000 description 3
- 229910000805 Pig iron Inorganic materials 0.000 description 3
- 239000004372 Polyvinyl alcohol Substances 0.000 description 3
- 239000000292 calcium oxide Substances 0.000 description 3
- 235000012255 calcium oxide Nutrition 0.000 description 3
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000003009 desulfurizing effect Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 2
- 150000001342 alkaline earth metals Chemical class 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 229910000514 dolomite Inorganic materials 0.000 description 2
- 239000010459 dolomite Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910016036 BaF 2 Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 229910001617 alkaline earth metal chloride Inorganic materials 0.000 description 1
- MYFXBBAEXORJNB-UHFFFAOYSA-N calcium cyanamide Chemical compound [Ca+2].[N-]=C=[N-] MYFXBBAEXORJNB-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000320 mechanical mixture Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000007127 saponification reaction Methods 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
- HUAUNKAZQWMVFY-UHFFFAOYSA-M sodium;oxocalcium;hydroxide Chemical compound [OH-].[Na+].[Ca]=O HUAUNKAZQWMVFY-UHFFFAOYSA-M 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/02—Dephosphorising or desulfurising
- C21C1/025—Agents used for dephosphorising or desulfurising
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Description
本発明は低融点カルシウムカーバイドの製法に
関する。
従来から溶銑の脱硫剤として、従来より生石
灰、ソーダ灰、ソーダー石灰、石灰窒素、及びカ
ルシウムカーバイド（以下カーバイドという）や
さらにアルカリ土類金属の弗化物（以下アルカリ
弗化物という）、アルカリ土類金属の炭酸塩（以
下アルカリ炭酸塩という）、炭素などを配合した
複合物、さらにはこれらを混合した組成物からな
る脱硫剤などがある。
最近、カーバイドは脱硫効果が優れ、安定した
脱硫能があるので、さらにこれに溶剤として、例
えばアルカリ炭酸塩、アルカリ弗化物などを添加
配合し低融点のものとし、これを積極的に使用し
ようとする傾向がある。
カーバイドを低融点化する方法としては、例え
ばカーバイド製造用電気炉の炉内タツピンク口直
上付近において溶融カーバイドにアルカリ弗化
物、アルカリ土類金属の塩化物（以下アルカリ塩
化物という）、アルカリ土類金属の酸化物（以下
アルカリ酸化物という）等を５〜20重量％添加し
キユポラ用の低融点カーバイドを製造する方法が
ある。（特公昭40−25049号）
しかしこの方法はカーバイド電気炉の樋上で溶
剤を添加するので、これら溶剤の分解、飛散ロス
による溶融歩留りが低下すること、さらにはカー
バイドの流れの変化等によりその品質が均一なも
のを大量に得ることは困難であり、低融点化の度
合に限界があつた。したがつて、これを脱硫剤と
して使用した場合、カーバイド単味またはアルカ
リ弗化物またはアルカリ塩化物を単に機械的に混
合したカーバイド脱硫剤に較べて、溶銑に対する
脱硫効果は一般的に大きいが、未だ満足出来る脱
硫能が得られない欠点があつた。
本発明者はこれらの欠点を解決することを目的
とし種々研究を重ねた結果、取鍋内の溶融カーバ
イドにアルカリ酸化物とアルカリ弗化物との共融
組成物を添加することにより、従来のアルカリ化
合物粉末を電気炉の樋上で添加する方法に比べて
その歩留りがよく、しかも品質が一定で、かつ脱
硫効果にすぐれた低融点カーバイドの製法に提供
しようとするものである。
すなわち、本発明は、アルカリ土類金属の酸化
物及び弗化物をそれぞれ重量で50〜60％及び50〜
40％の割合で混合した粉末を結合剤の存在下成形
すると共にその成形物を温度1200〜1500℃に加熱
して共融組成物とし、それを冷却、粉砕して１〜
３mmの粒度に調整した後、溶融カルシウムカーバ
イド100重量部に対し10〜25重量部を添加するこ
とを特徴とする低融点カルシウムカーバイドの製
法である。
以下さらに本発明を詳しく説明する。
本発明に用いるアルカリ酸化物としては、
CaO、MgO、BaOおよび軽焼ドロマイトの如き
複合酸化物などがあげられる。
また、アルカリ弗化物としては、CaF2、
MgF2、BaF2などがあげられる。
しかし経済性の面より好ましくは、アルカリ酸
化物としてCaO、MgO、軽焼ドロマイト、アル
カリ弗化物としてCaF2、MgF2より各々１種類ず
つ選択するのが良い。
アルカリ酸化物とアルカリ弗化物とは予め微粉
砕し、アルカリ酸化物50〜60重量部とアルカリ弗
化物50〜40重量部を配合して充分混合し、例えば
ポリビニルアルコールの如き水溶性有機質結合剤
を数％添加して混練し適当な形状の成型体とす
る。
次にその成型体を加熱炉で1200〜1500℃に加熱
し、アルカリ酸化物とアルカリ弗化物との共融組
成物とし、これを冷却した後１〜３mmの粒状に再
破砕してこれを溶融カーバイドに対して添加配合
する。
アルカリ酸化物とアルカリ弗化物の配合比率に
おいて、アルカリ酸化物に対しアルカリ弗化物の
内割配合40重量部未満では充分な低温での共晶組
成とならず、したがつて共融成分にならず溶融カ
ーバイドに添加した場合、均一な溶融が不可能と
なる。50重量部をこえると、過共融組成となり経
済的にも高価な弗化物の使用ロスが多くなるとと
もに、溶融カーバイドに添加した場合の共融組成
物に含有するアルカリ弗化物の分解損失を大きく
し結果的に弗化物歩留りの低下をきたすことにな
る。
又、アルカリ酸化物とアルカリ弗化物との混合
物の成型体を温度1200〜1500℃に加熱する理由は
1200℃未満の加熱では、酸化物と弗化物との共融
組成物とならず、単に焼きしまつたものとなり、
溶融しないため不適当である。また1500℃をこえ
ると、共融組成を形成はするが使用される熱エネ
ルギーが大きくなるため不経済であると同時に、
比較的硬い共融組成物となり粉砕工程において破
砕に動力がかかり不利となるので望ましくない。
更にアルカリ酸化物とアルカリ弗化物との共融
組成物を１〜３m/mに限定して溶融カーバイド
に添加する理由は、１m/m未満では添加時にお
ける共融組成物の飛散ロスが大きく充分なる低融
点カーバイドとはなり難く、３m/mをこえると
溶融が困難となり均一な低融点カーバイドの製造
が出来ないことによるものである。
次に、共融組成物を溶融カーバイド100重量部
に対し10〜25重量部添加する理由は、10重量部未
満では溶銑に添加しても脱硫効果が良好な低融点
カーバイドにならず、25重量部こえるとカーバイ
ド中のカーバイド純分が減少し充分な脱硫能が得
られないこと及び共融物が均一溶融することが比
較的困難になるからである。
従来の低融点カーバイドの製法はカーバイド製
造用電気炉の炉内タツピング口直上付近において
溶融カーバイドに対し単にアルカリ弗化物、アル
カリ酸化物、アルカリ塩化物の１種または２種以
上を添加したものにすぎず、低融点の度合が少な
く、また添加物の溶融歩留りも低く、大量に生産
することは困難であつた。また溶銑に添加しても
脱硫効果を十分に発揮しえなかつたのに較べ、本
発明はあらかじめ低融点共融組成物を形成し、こ
れを溶融カーバイドに添加混合させることによ
り、その歩留りが良く、しかも均一な組成の低融
点カーバイド得ることができる。
したがつて、本発明の低融点カーバイドを脱硫
剤として使用した場合、極めて良好な脱硫効果を
得ることができる。
以下、実施例によつて本発明を説明する。
実施例
(1) 共融組成物の製造
アルカリ酸化物とアルカリ弗化物の粉末をそ
れぞれ第１表に示す割合で混合し、これにポリ
ビニルアルコール（重合度1850 ケン化度87モ
ル％）の１％水溶液を添加しアイリツヒ造粒機
により粒度１〜５m/mの粒状体とした。
次いでこれを加熱炉により1200〜1500℃に加
熱して共融し、冷却後、再破砕し粒度１〜３mm
の粒状体とした。
(2) 低融点カーバイドの製造
カーバイド製造用電気炉の流口から流出する
カーバイド（純度82％）の取鍋内に第１表に示
す共融組成物を散布しておき、カーバイドを流
し込み鉄棒で十分に撹拌した後、冷却粉砕し粒
度１mm以下に調整した。なお、共融組成物は粒
状であるため飛散損失は少なく、しかも得られ
た低融点カーバイドは均一なものであつた。比
較のために溶融カーバイドに対し、CaF2粉末
を10重量％添加したものを実験No.7に示す。
その結果を第２表に示す。
(3) 脱硫試験
小型高周波誘導炉で銑鉄（Ｓ含有量0.050〜
0.055％）を５Kg溶解し、溶解温度を1500℃一
定に保持しながら、第１表及び第２表に示す低
融点カーバイド脱硫剤及び比較品（粒度１mm以
下に調整）を銑鉄に対し0.5重量％溶湯表面添
加し、一定回転数に設定された耐火製クラスタ
ーで２分間撹拌処理し、処理後の銑鉄中のＳ含
有量を分析した。その結果を第３表に示す。
The present invention relates to a method for producing low melting point calcium carbide. Conventionally, quicklime, soda ash, soda lime, lime nitrogen, calcium carbide (hereinafter referred to as carbide), as well as alkaline earth metal fluorides (hereinafter referred to as alkali fluoride) and alkaline earth metals have been used as desulfurizing agents for hot metal. carbonates (hereinafter referred to as alkali carbonates), composites containing carbon, etc., and desulfurization agents made of compositions containing these. Recently, since carbide has an excellent desulfurization effect and stable desulfurization ability, attempts have been made to actively use carbide by adding and blending it with solvents such as alkali carbonates and alkali fluorides to make it have a low melting point. There is a tendency to As a method of lowering the melting point of carbide, for example, alkali fluoride, alkaline earth metal chloride (hereinafter referred to as alkali chloride), alkaline earth metal There is a method of producing low melting point carbide for cupora by adding 5 to 20% by weight of oxides such as (hereinafter referred to as alkali oxides). (Special Publication No. 40-25049) However, since this method adds the solvent on the gutter of the carbide electric furnace, the melting yield decreases due to the decomposition and scattering loss of these solvents, and furthermore, the quality of the product is affected by changes in the flow of carbide. It is difficult to obtain a large amount of homogeneous material, and there is a limit to the degree to which the melting point can be lowered. Therefore, when used as a desulfurization agent, the desulfurization effect on hot metal is generally greater than that of carbide desulfurization agents that are simply mechanically mixed with carbide, alkali fluoride, or alkali chloride, but still The drawback was that a satisfactory desulfurization ability could not be obtained. As a result of various studies aimed at solving these shortcomings, the present inventor has discovered that by adding a eutectic composition of alkali oxide and alkali fluoride to the molten carbide in the ladle, the conventional alkali The present invention aims to provide a method for producing low-melting point carbide that has a higher yield than the method of adding compound powder on the gutter of an electric furnace, has constant quality, and has an excellent desulfurization effect. That is, the present invention contains alkaline earth metal oxides and fluorides in an amount of 50 to 60% by weight and 50 to 50% by weight, respectively.
The powder mixed at a ratio of 40% is molded in the presence of a binder, and the molded product is heated to a temperature of 1200 to 1500°C to obtain a eutectic composition, which is then cooled and crushed to form a eutectic composition.
This is a method for producing low melting point calcium carbide, which is characterized in that after adjusting the particle size to 3 mm, 10 to 25 parts by weight are added to 100 parts by weight of molten calcium carbide. The present invention will be further explained in detail below. As the alkali oxide used in the present invention,
Examples include complex oxides such as CaO, MgO, BaO, and lightly calcined dolomite. In addition, examples of alkali fluorides include CaF 2 ,
Examples include MgF 2 and BaF 2 . However, from the economic point of view, it is preferable to select one each from CaO, MgO, lightly calcined dolomite as the alkali oxide, and CaF 2 and MgF 2 as the alkali fluoride. The alkali oxide and alkali fluoride are finely ground in advance, 50 to 60 parts by weight of the alkali oxide and 50 to 40 parts by weight of the alkali fluoride are mixed thoroughly, and a water-soluble organic binder such as polyvinyl alcohol is added. It is added in a few percent and kneaded to form a molded product of an appropriate shape. Next, the molded body is heated to 1200 to 1500℃ in a heating furnace to form a eutectic composition of alkali oxide and alkali fluoride, which is cooled and re-crushed into particles of 1 to 3 mm and melted. Addition and blending to carbide. In the blending ratio of alkali oxide and alkali fluoride, if the proportion of alkali fluoride to alkali oxide is less than 40 parts by weight, it will not form a eutectic composition at a sufficient low temperature, and therefore will not become a eutectic component. When added to molten carbide, uniform melting is not possible. If it exceeds 50 parts by weight, the composition becomes hypereutectic, resulting in a large loss of economically expensive fluoride, and also increases the decomposition loss of the alkali fluoride contained in the eutectic composition when added to molten carbide. This results in a decrease in fluoride yield. Also, the reason why the molded product of the mixture of alkali oxide and alkali fluoride is heated to a temperature of 1200 to 1500℃ is
When heated below 1200℃, a eutectic composition of oxide and fluoride is not formed, but it is simply baked.
It is unsuitable because it does not melt. Moreover, if the temperature exceeds 1500℃, although a eutectic composition is formed, it is uneconomical because the thermal energy used increases.
This is undesirable since it results in a relatively hard eutectic composition, which is disadvantageous because power is required for crushing in the crushing process. Furthermore, the reason why the eutectic composition of alkali oxide and alkali fluoride is limited to 1 to 3 m/m and added to the molten carbide is that if it is less than 1 m/m, the scattering loss of the eutectic composition during addition is large. This is because it is difficult to form a low melting point carbide, and if it exceeds 3 m/m, it becomes difficult to melt and it is impossible to produce a uniform low melting point carbide. Next, the reason why 10 to 25 parts by weight of the eutectic composition is added to 100 parts by weight of molten carbide is that if it is less than 10 parts by weight, even if it is added to hot metal, it will not become a low melting point carbide with good desulfurization effect; This is because if the amount exceeds 1.5%, the pure carbide content in the carbide decreases, making it impossible to obtain sufficient desulfurization ability and making it relatively difficult to uniformly melt the eutectic. The conventional method for producing low melting point carbide is simply adding one or more of alkali fluorides, alkali oxides, and alkali chlorides to molten carbide in the vicinity of the tapping opening in the electric furnace for producing carbide. First, it has a low melting point and a low melting yield of additives, making it difficult to produce in large quantities. In addition, compared to the case where the desulfurization effect could not be sufficiently exhibited even when added to hot metal, the present invention improves the yield by forming a low melting point eutectic composition in advance and adding and mixing it to molten carbide. Moreover, a low melting point carbide having a uniform composition can be obtained. Therefore, when the low melting point carbide of the present invention is used as a desulfurization agent, an extremely good desulfurization effect can be obtained. The present invention will be explained below with reference to Examples. Example (1) Production of eutectic composition Powders of alkali oxide and alkali fluoride were mixed in the proportions shown in Table 1, and 1% of polyvinyl alcohol (degree of polymerization 1850, degree of saponification 87 mol%) was added to this. An aqueous solution was added and the mixture was made into granules with a particle size of 1 to 5 m/m using an Eirich granulator. Next, this is heated to 1200-1500℃ in a heating furnace to eutecticize it, and after cooling, it is crushed again to obtain a particle size of 1-3 mm.
It was made into a granular material. (2) Production of low melting point carbide The eutectic composition shown in Table 1 was sprinkled into a ladle of carbide (purity 82%) flowing out from the outlet of an electric furnace for carbide production, and the carbide was poured in using an iron rod. After thorough stirring, the mixture was cooled and pulverized to adjust the particle size to 1 mm or less. Note that since the eutectic composition was granular, the scattering loss was small, and the obtained low melting point carbide was uniform. For comparison, Experiment No. 7 shows a sample in which 10% by weight of CaF 2 powder was added to molten carbide.
The results are shown in Table 2. (3) Desulfurization test Pig iron (S content 0.050~
0.055%), and while keeping the melting temperature constant at 1500℃, add 0.5% by weight of the low melting point carbide desulfurization agent and comparative products (adjusted to a particle size of 1 mm or less) shown in Tables 1 and 2 to the pig iron. It was added to the surface of the molten metal, stirred for 2 minutes using a refractory cluster set at a constant rotation speed, and the S content in the pig iron after the treatment was analyzed. The results are shown in Table 3.
【表】【table】
【表】【table】
【表】
比較例
共融組成物のかわりに単なる機械的混合物の造
粒物を用いて試験した。
すなわち、実施例と同様にして、アルカリ酸化
物とアルカリ弗化物の粉末をそれぞれ第４表に示
す割合で混合し、これにポリビニルアルコールの
１％水溶液を添加しアイリツヒ造粒機により粒度
１〜５m/mの造粒体とした。これを乾燥した
後、溶融カルシウムカーバイド100重量部に対し
第４表に示す割合で添加して脱硫剤とした。この
脱硫剤を用いて実施例と同様な試験をした。その
結果を第４表及び第５表に示す。[Table] Comparative Example A test was conducted using a simple mechanical mixture granulation instead of the eutectic composition. That is, in the same manner as in the example, alkali oxide and alkali fluoride powders were mixed in the proportions shown in Table 4, and a 1% aqueous solution of polyvinyl alcohol was added thereto, and the particle size was 1 to 5 m using an Eirich granulator. /m granules. After this was dried, it was added to 100 parts by weight of molten calcium carbide in the proportions shown in Table 4 to obtain a desulfurizing agent. A test similar to that in the example was conducted using this desulfurizing agent. The results are shown in Tables 4 and 5.
【表】【table】
【表】【table】
【表】
以上から、実施例（実験番号１〜６）は比較例
（実験番号８〜13）に比べて、脱硫効果にすぐれ
ていることがわかる。[Table] From the above, it can be seen that the examples (experiment numbers 1 to 6) have superior desulfurization effects compared to the comparative examples (experiment numbers 8 to 13).
Claims (1)
ぞれ重量で50〜60％及び50〜40％の割合で混合し
た粉末を結合剤の存在下成形すると共にその成形
物を温度1200〜1500℃に加熱して共融組成物と
し、それを冷却、粉砕して１〜３mmの粒度に調整
した後、溶融カルシウムカーバイド100重量部に
対し10〜25重量部を添加することを特徴とする低
融点カルシウムカーバイドの製法。1. A powder mixture of 50 to 60% and 50 to 40% by weight of alkaline earth metal oxides and fluorides, respectively, is molded in the presence of a binder, and the molded product is heated to a temperature of 1200 to 1500°C. A low melting point calcium carbide characterized by adding 10 to 25 parts by weight to 100 parts by weight of molten calcium carbide after cooling and pulverizing it to obtain a eutectic composition and adjusting the particle size to 1 to 3 mm. manufacturing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2420183A JPS58161717A (en) | 1983-02-16 | 1983-02-16 | Production of low melting point desulfurizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2420183A JPS58161717A (en) | 1983-02-16 | 1983-02-16 | Production of low melting point desulfurizer |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1386577A Division JPS5399023A (en) | 1977-02-10 | 1977-02-10 | Desulfurization agent with low melting point |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58161717A JPS58161717A (en) | 1983-09-26 |
| JPS6156286B2 true JPS6156286B2 (en) | 1986-12-02 |
Family
ID=12131703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2420183A Granted JPS58161717A (en) | 1983-02-16 | 1983-02-16 | Production of low melting point desulfurizer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58161717A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2679256B1 (en) * | 1991-07-18 | 1994-08-12 | Pechiney Electrometallurgie | SULFURIZER FOR LIQUID CAST IRON BASED ON AGGLOMERATED CALCIUM CARBIDE. |
-
1983
- 1983-02-16 JP JP2420183A patent/JPS58161717A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58161717A (en) | 1983-09-26 |
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