JPS5934217B2 - iron ore briquettes - Google Patents
iron ore briquettesInfo
- Publication number
- JPS5934217B2 JPS5934217B2 JP11498982A JP11498982A JPS5934217B2 JP S5934217 B2 JPS5934217 B2 JP S5934217B2 JP 11498982 A JP11498982 A JP 11498982A JP 11498982 A JP11498982 A JP 11498982A JP S5934217 B2 JPS5934217 B2 JP S5934217B2
- Authority
- JP
- Japan
- Prior art keywords
- iron ore
- iron
- briquettes
- powder
- cupola
- 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
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Description
【発明の詳細な説明】 本発明は鉄鉱石ブリケットに関するものである。[Detailed description of the invention] The present invention relates to iron ore briquettes.
従来、鋳鉄鋳物を製造するためにキュポラに装入する鉄
原料としては、高炉で鉄鉱石を還元溶解して製造した銑
鉄や、銑鉄でつくられた鋼材の廃材などが主として用い
られていた。Conventionally, the iron raw materials charged into cupolas to manufacture cast iron have mainly been pig iron produced by reducing and melting iron ore in a blast furnace, or scrap steel made from pig iron.
ところで、高炉を用いずに鉄鉱石または還元鉄を直接キ
ュポラで溶解して鉄鉱石または還元鉄から直接鋳鉄鋳物
が製造できれば、格段に飛躍した省資源、省エネルギー
を図ることができ、原料費を大幅に削減できる。By the way, if iron ore or reduced iron could be directly melted in a cupola without using a blast furnace and cast iron castings could be manufactured directly from iron ore or reduced iron, it would be possible to significantly save resources and energy, and to significantly reduce raw material costs. can be reduced to
ところが、キュポラに粉体状の鉄鉱石を装入すると、炉
内で目詰まりが生じて通風を妨げ、これを防ぐためには
、鉄鉱石粉をブリケット化することも考えられるが、鉄
鉱石粉のような可塑性のない粉体は圧縮力のみでは成型
が困難であり、フ刃ケット化に問題がある。However, when powdered iron ore is charged into a cupola, clogging occurs in the furnace and obstructs ventilation.To prevent this, it is possible to briquette the iron ore powder, but Powder without plasticity is difficult to mold using compressive force alone, and there is a problem in forming it into a blade.
本発明は、可塑性のあるアルミニウム粉末同志の圧着性
を利用して鉄鉱石粉のブリケット化を可能にして上記問
題を解決したもので、即ち図面に示すように、鉄鉱石粉
１にアルミニウム粉末２を混合し、これを加圧成型して
鉄鉱石ブリケット３としたものである。The present invention solves the above problem by making it possible to make iron ore powder into briquettes by utilizing the compressibility of plastic aluminum powder. In other words, as shown in the drawing, aluminum powder 2 is mixed with iron ore powder 1. The iron ore briquette 3 was then molded under pressure.
この際、アルミニウム粉末２は鉄鉱石重量に対して理論
上３０％以内の添加量でよい。At this time, the amount of aluminum powder 2 to be added may theoretically be within 30% of the weight of the iron ore.
更に上記のほかに、必要に応じて成分調整用金属、例え
ばフェロシリコン、あるいはフェロマンガン等を添加し
てもよい。Furthermore, in addition to the above, a metal for component adjustment, such as ferrosilicon or ferromanganese, may be added as necessary.
上記の本発明に係る鉄鉱石ブリケット３をキュポラに装
入すると、鉄鉱石ブリケット３はキュポラ内上部の予熱
帯で加熱され、鉄鉱石の主成分であるＦｅ２Ｏ３は炉内
の還元雰囲気によって比較的低い温度でＦｅ３Ｏ４に還
元される。When the iron ore briquettes 3 according to the present invention described above are charged into a cupola, the iron ore briquettes 3 are heated in the preheating zone in the upper part of the cupola, and Fe2O3, the main component of iron ore, is relatively low due to the reducing atmosphere in the furnace. It is reduced to Fe3O4 at temperature.
前記Ｆ ｅ３０４はブリケット中のアルミニウム粉末と
約８３０°Ｃ以上で次式の化学反応を起し、酸化鉄を還
元する。The Fe304 causes a chemical reaction of the following formula with the aluminum powder in the briquettes at a temperature of about 830° C. or higher to reduce iron oxide.
８ Ａ ｌ＋ ３ Ｆ ｅ３ ｏ、 −＋ ９ Ｆ ｅ
＋ ４ Ａ１２０３この際、アルミニウム粉末とＦｅ
３Ｏ４の混合物は１ｋｇで理論上７００Ｋｃａｌの熱量
を放出するので、前記化学反応によって還元された金属
鉄は、還元と同時に溶解されるため、鉄鉱石の還元溶解
に要する時間が大幅に短縮し、溶解速度が増加する、し
かも、前記化学反応によって発生する熱は、ブリケット
中の還元された金属鉄を溶解しても、まだ余まるので、
ブリケット中のアルミニウム添加量を減らすか、あるい
はキュポラ溶解の熱源となるコークスの使用量を減少す
ることができる。8 A l+ 3 Fe3 o, -+ 9 Fe
+ 4 A1203 At this time, aluminum powder and Fe
Since 1 kg of 3O4 mixture theoretically releases 700 Kcal of heat, the metallic iron reduced by the chemical reaction is dissolved at the same time as the reduction, so the time required for the reductive dissolution of iron ore is greatly shortened and the melting process is reduced. The speed increases, and the heat generated by the chemical reaction still remains even after melting the reduced metallic iron in the briquettes.
It is possible to reduce the amount of aluminum added in the briquettes, or to reduce the amount of coke used as a heat source for cupola melting.
本発明に係る鉄鉱石ブリケットは、上記の理由により、
比較的低い温度で還元溶解されるため、これをキュポラ
に装入すると、キュポラ内の高い位置で溶解され、溶鉄
が灼熱したコークス層を滴下する距離が長くなる。For the above reasons, the iron ore briquette according to the present invention has the following properties:
Since it is reductively melted at a relatively low temperature, when it is charged into a cupola, it is melted at a high position within the cupola, increasing the distance over which the molten iron drips down the scorching coke layer.
このため溶鉄への加炭が十分行なわれ、従ってブリケッ
ト中に加炭剤を添加する必要はない。Therefore, the molten iron is sufficiently carburized, and there is no need to add a carburizing agent to the briquettes.
また、本発明に係る鉄鉱石ブリケットは粉状の鉄鉱石と
アルミニウムを使用するため、両者の接触が良く、なお
かつ、加圧成型するので、さらに両者の接触が充分であ
り、このため還元反応がより完全に行なわれる。In addition, since the iron ore briquette according to the present invention uses powdered iron ore and aluminum, there is good contact between the two, and since the iron ore briquettes are press-molded, there is sufficient contact between the two, which prevents the reduction reaction. done more completely.
図面は本発明に係る鉄鉱石ブリケットの拡大断面図であ
る。
１・・・・・・鉄鉱石粉、２簡簡アルミニウム粉末、計
・・・・・鉄鉱石ブリケット。The drawing is an enlarged cross-sectional view of an iron ore briquette according to the present invention. 1... Iron ore powder, 2 Simple aluminum powder, Total... Iron ore briquettes.
Claims (1)
成型したことを特徴とする鉄鉱石フ刃ケット。1. An iron ore blade knife characterized by mixing iron ore powder with aluminum powder and press-molding the mixture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11498982A JPS5934217B2 (en) | 1982-07-01 | 1982-07-01 | iron ore briquettes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11498982A JPS5934217B2 (en) | 1982-07-01 | 1982-07-01 | iron ore briquettes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS596332A JPS596332A (en) | 1984-01-13 |
| JPS5934217B2 true JPS5934217B2 (en) | 1984-08-21 |
Family
ID=14651573
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11498982A Expired JPS5934217B2 (en) | 1982-07-01 | 1982-07-01 | iron ore briquettes |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5934217B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0343531Y2 (en) * | 1986-08-29 | 1991-09-12 |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100226897B1 (en) * | 1994-12-26 | 1999-10-15 | 이구택 | Agglomerate method of pre-reduction fine ore for molten pig iron |
| US20080145685A1 (en) * | 2005-02-07 | 2008-06-19 | Hoei Shokai Co., Ltd. | Lump Object and Method of Producing the Same |
-
1982
- 1982-07-01 JP JP11498982A patent/JPS5934217B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0343531Y2 (en) * | 1986-08-29 | 1991-09-12 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS596332A (en) | 1984-01-13 |
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