JPH0297610A - Pretreatment of molten pig iron - Google Patents
Pretreatment of molten pig ironInfo
- Publication number
- JPH0297610A JPH0297610A JP24648188A JP24648188A JPH0297610A JP H0297610 A JPH0297610 A JP H0297610A JP 24648188 A JP24648188 A JP 24648188A JP 24648188 A JP24648188 A JP 24648188A JP H0297610 A JPH0297610 A JP H0297610A
- Authority
- JP
- Japan
- Prior art keywords
- mixed
- agent
- pig iron
- molten pig
- desiliconizing agent
- 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.)
- Pending
Links
- 229910000805 Pig iron Inorganic materials 0.000 title abstract 8
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 38
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229910052742 iron Inorganic materials 0.000 claims abstract description 14
- 239000004576 sand Substances 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000002184 metal Substances 0.000 claims description 20
- 229910052751 metal Inorganic materials 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 6
- 238000002203 pretreatment Methods 0.000 claims description 3
- 238000009991 scouring Methods 0.000 claims 1
- 238000007670 refining Methods 0.000 abstract description 10
- 239000000428 dust Substances 0.000 abstract description 6
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Landscapes
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
Description
【発明の詳細な説明】 ［産業上の利用分野］ この発明は、溶銑予備処理方法に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a hot metal pretreatment method.
［従来め技術］
従来、取鍋精錬の代わりに、精錬剤を出銑樋を流れる溶
銑に投入して脱Ｓｔ、脱Ｐを行う溶銑予備処理が行われ
ている。これには、以下のようなものがある。一つは第
１図に示すように出銑樋１上に設けたホッパー３内の精
錬剤（脱珪剤を含む）５を切出しフィーダ４を介して出
銑樋１を流れる溶銑２の表面に上置きし、溶銑が傾注樋
を介して溶銑鍋中に落下、注入されるときの混合、攪拌
を利用して溶銑の脱Ｓｉ、脱Ｐを行うものである。他の
一つは、特開昭５８−１３０２８号公報に示されている
もので、第２図に示すように出銑樋１の近傍に設けられ
たタンク６に搬送用ガス（Ｎ２ 、Ａｒ、ＣＯ２、空気
等）を圧入し、タンク６内の精錬剤５を、気送管７を通
してランス８の先端から出銑樋１を流れる溶銑に吹込む
ものである。これは、ランスからの吹込み時に精錬剤、
が溶銑中に混合するので、前者のものより精錬剤の反応
が早くなるという利点がある。そして、精錬剤の中、脱
珪剤としては圧延工程で発生するミルスケールを主とし
て単味で使用される。又、はミルスケールの代替品とし
て小粒焼結鉱または砂鉄が単味で使用されることがあっ
た。[Conventional Technology] Conventionally, instead of ladle refining, hot metal pretreatment has been performed in which a refining agent is introduced into hot metal flowing through a tap hole to remove St and P. These include the following: One is to cut out the refining agent (including a desiliconizing agent) 5 in the hopper 3 provided on the tap runner 1 as shown in FIG. This method removes Si and P from the hot metal by utilizing the mixing and stirring that occurs when the hot metal falls into the hot metal pot through the tilting trough and is poured into the hot metal pot. The other one is shown in Japanese Patent Application Laid-Open No. 58-13028, and as shown in FIG. (CO2, air, etc.) is injected under pressure, and the refining agent 5 in the tank 6 is blown into the hot metal flowing through the tap hole 1 from the tip of the lance 8 through the pneumatic pipe 7. This is a refining agent when injected from a lance.
Since it is mixed into the hot metal, it has the advantage that the reaction of the refining agent is faster than the former one. Among the refining agents, mill scale generated during the rolling process is mainly used alone as a desiliconizing agent. Also, small sintered ore or iron sand was sometimes used alone as a substitute for mill scale.
［発明が解決しようとする課Ｉ！１］
ミルスケールは、供給量の変動が大きく脱Ｓｔすべき溶
銑の量の増加に対応できないことがある。また、ミルス
ケールを使用すると溶銑鍋での発塵が多く、周りの作業
環境を悪くする。また、砂鉄単味で使用すると溶銑の飛
散が発生することがある。[The problem that the invention attempts to solve I! 1] Mill scales may not be able to cope with an increase in the amount of hot metal to be de-Sted due to large fluctuations in the supply amount. In addition, when a mill scale is used, a lot of dust is generated in the hot metal ladle, which worsens the surrounding working environment. Additionally, if iron sand is used alone, molten metal may scatter.
［課題を解決するための手段］
この発明は、以上のような問題点を解決しようとするも
ので、溶銑流中に精錬剤を投入して溶銑の予備処理を行
う方法において、ミルスケール、小粒焼結鉱および砂鉄
を混合した混合脱珪剤を使用し、且つ混合脱珪剤の水分
値を０．５％以上〜２％以下とすることを特徴とする溶
鉄予備処理方法である。[Means for Solving the Problems] The present invention aims to solve the above-mentioned problems.It is an object of the present invention to solve the above-mentioned problems. This is a molten iron pretreatment method characterized by using a mixed desiliconizing agent mixed with sintered ore and iron sand, and controlling the moisture value of the mixed desiliconizing agent to 0.5% or more and 2% or less.
［作用］
脱珪剤として、ミルスケール、小粒焼結鉱および含有水
分砂鉄を混合したものを使用することにより、脱珪剤の
需給が容易となる。[Function] By using a mixture of mill scale, small sintered ore and water-containing iron sand as the desiliconizing agent, supply and demand of the desiliconizing agent becomes easy.
混合脱珪剤の水分値の限定理由は、以下の通りである。The reason for limiting the moisture value of the mixed desiliconizing agent is as follows.
混合脱珪剤の水分値を０．５％未満とすると、発塵が多
くなり、２％を越えると溶銑の飛散があり、作業環境上
および安全上問題があるからである。This is because if the moisture value of the mixed desiliconizing agent is less than 0.5%, a large amount of dust will be generated, and if it exceeds 2%, hot metal will scatter, causing problems in terms of working environment and safety.
［実施例コ
本発明の実施例を以下に詳細に説明する。脱珪剤の投入
方法は第１図に示す上置き法により行った。第１表に試
験に供した各種脱珪剤の成分分析結果および粒度を示す
。[Example] Examples of the present invention will be described in detail below. The method for adding the desiliconizing agent was the overlay method shown in FIG. Table 1 shows the component analysis results and particle sizes of the various desiliconizing agents tested.
第２表は各銘柄単味を脱珪剤として投入試験の結果を示
すものである。この表よりミルスケール、小粒焼結鉱お
よび砂鉄の各脱珪剤はほぼ等しい使用原単位で脱珪率が
、
ミルスケール；４３．２％、
小粒焼結鉱 ；４５．９％、
砂鉄 、４０．５％
と近似していること、また、脱珪剤としての効率は、ミ
ルスケールを１００とすれば、小粒焼結鉱は９７、砂鉄
は９０であることが分かった。Table 2 shows the results of tests using each brand as a desiliconizing agent. From this table, the desiliconizing agents for mill scale, small sintered ore, and iron sand have approximately the same desiliconization rate at the same consumption unit: Mill scale: 43.2%, small sintered ore: 45.9%, iron sand, 40 It was found that the efficiency as a desiliconizer is approximately .5%, and that the efficiency as a desiliconizing agent is 97 for small grain sintered ore and 90 for iron sand, if mill scale is 100.
第１表の続き
第１表 単位二％
以上の単味投入試験の結果に基づいて、混合脱珪剤投入
試験を行った。その結果を第３表に示すこの表より、混
合脱珪剤を使用しても、その脱珪率はミルスケール単味
使用と殆ど変わらないことが分かる。Continuation of Table 1 Table 1 Based on the results of the single addition test in units of 2% or more, a mixed desiliconizing agent addition test was conducted. The results are shown in Table 3. From this table, it can be seen that even when a mixed desiliconizing agent is used, the desiliconization rate is almost the same as when using only mill scale.
第３表
第２表
注；ここに、Ａ、Ｂ、Ｃは下記の混合割合の混合脱珪剤
を表す。Table 3 Table 2 Note: Here, A, B, and C represent mixed desiliconizing agents in the following mixing ratios.
Ａ； ミルスケール＝５０、小粒焼結鉱：３ｏ、砂鉄：
２゜Ｂ； ミルスケール＝５０、小粒焼結鉱：３５、砂
鉄：１５Ｃ； ミルスケール＝５０、小粒焼結鉱＝４０
、砂鉄：１゜第４表は混合脱珪剤Ｃの含有水分を変化し
て、溶銑鍋上の発塵および溶銑の飛散状況を調査した結
果を示す、この表より、０．５以上〜２％以下の範囲に
すれば、発塵および溶銑の飛散がなくなることが分かる
。A; Mill scale = 50, small sintered ore: 3o, iron sand:
2゜B; Mill scale = 50, small sintered ore: 35, iron sand: 15C; Mill scale = 50, small sintered ore = 40
, iron sand: 1゜ Table 4 shows the results of investigating the dust generation on the hot metal ladle and the scattering of hot metal by changing the moisture content of the mixed desiliconizing agent C. From this table, from 0.5 to 2 % or less, it can be seen that dust generation and scattering of hot metal are eliminated.
第１図は一つの脱珪剤投入方法を示す図、第２図は他の
脱珪剤投入方法を示す図である。
１・・・出銑樋、２・・・溶銑、３・・・ホッパー４・
・・切出しフィーダ、５・・・精錬剤、６・・・タンク
、７・・・気送管、８・・・ランス。FIG. 1 is a diagram showing one method of introducing a desiliconizing agent, and FIG. 2 is a diagram showing another method of introducing a desiliconizing agent. 1... Tapping trough, 2... Hot metal, 3... Hopper 4.
... Cutting feeder, 5... Refining agent, 6... Tank, 7... Pneumatic pipe, 8... Lance.
Claims (1)
法において、ミルスケール、小粒焼結鉱および含有水分
砂鉄を混合した混合脱珪剤を使用し、且つ混合脱珪剤の
水分値を０．５％以上〜２％以下とすることを特徴とす
る溶銑予備処理方法。In the method of pre-treating hot metal by introducing a scouring agent into the hot metal flow, a mixed desiliconizing agent containing mill scale, small sintered ore and iron sand containing water is used, and the moisture value of the mixed desiliconizing agent is A hot metal pretreatment method characterized in that the concentration is 0.5% or more and 2% or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24648188A JPH0297610A (en) | 1988-09-30 | 1988-09-30 | Pretreatment of molten pig iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24648188A JPH0297610A (en) | 1988-09-30 | 1988-09-30 | Pretreatment of molten pig iron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0297610A true JPH0297610A (en) | 1990-04-10 |
Family
ID=17149038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24648188A Pending JPH0297610A (en) | 1988-09-30 | 1988-09-30 | Pretreatment of molten pig iron |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0297610A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007212127A (en) * | 2006-02-08 | 2007-08-23 | Fn Herstal Sa | Improved "moving red dot" sighting device |
-
1988
- 1988-09-30 JP JP24648188A patent/JPH0297610A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007212127A (en) * | 2006-02-08 | 2007-08-23 | Fn Herstal Sa | Improved "moving red dot" sighting device |
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