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Ferro-silicon powder remelting process

A ferrosilicon powder and remelting technology, which is applied in the field of ferrosilicon powder remelting process, can solve the problems of secondary dust pollution, increased product production cost, and decreased product production rate, so as to save energy and improve product production. rate, pollution prevention effect

Inactive Publication Date: 2008-04-16
内蒙古鄂尔多斯冶金有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the known domestic and foreign ferroalloy industries produce a certain amount of ferrosilicon powder when ferrosilicon is produced, processed and crushed. Among them, 3% of ferrosilicon powder is produced by manual crushing, and 7% of ferrosilicon powder is produced by mechanical crushing, resulting in the finished product Rates drop, product production costs rise
The remaining crushed ferrosilicon powder is usually packed in ton bags and sold at a low price. These ferrosilicon powders are prone to secondary dust pollution during packaging and transportation.
At present, there is no production enterprise that remelts ferrosilicon powder into lump ferrosilicon

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Example 1. Air is evenly introduced into the bottom blowing ladle ten minutes before tapping, and when the molten iron has a large flow rate, blow in 2.0-12M of oxygen and air. 3 / h: 1.0~6M 3 / h and add half of the special flux one after another. After adding the flux, adjust the ventilation ratio to 4.0-16M of oxygen and air 3 / h: 1.0~6M 3 / h, ventilation until the molten iron does not splash out of the ladle, and add the prepared ferrosilicon powder (6Kg per bag) at a rate of 20 bags per minute, add 330Kg of ferrosilicon powder with a particle size of 3mm, and add 130Kg of special flux , A bottle of oxygen blowing, the ferrosilicon powder melts well, the slag has good fluidity, no sticking phenomenon occurs, and the composition of the finished ferrosilicon is qualified. This time the iron was 3487Kg.

Embodiment 2

[0011] Example 2. From ten minutes before tapping to the end of tapping, air is evenly introduced into the bottom blowing ladle. When the molten iron has a large flow rate, it is blown in at a ratio of 2:1 of oxygen and air, and half of the special flux is added successively. Add the prepared ferrosilicon powder (6Kg per bag) at a speed of 5 bags per minute. After adding the ferrosilicon powder, add half of the special flux. The furnace condition is stable, the molten iron temperature is high, and the ventilation rate is limited to the continuous turning of the molten iron. A total of 250Kg of ferrosilicon powder with a particle size of 3mm and 120Kg of special flux are added. The ferrosilicon powder melts well, the slag has good fluidity, and there is no sticking phenomenon. This time, 3350Kg of iron was tapped, and the composition of the finished ferrosilicon was qualified.

Embodiment 3

[0012] Example 3. Air is evenly introduced into the bottom blowing ladle ten minutes before tapping. When the molten iron has a large flow rate, oxygen and air are blown in at a ratio of 2:1, and flux and ferrosilicon powder are added alternately at a ratio of 1:3. Add 400Kg of ferrosilicon powder with a particle size of 3mm, add 130Kg of special flux, blow a bottle of oxygen, and the ferrosilicon powder melts well. Due to the large amount of ferrosilicon powder added, the temperature of the molten iron drops rapidly, and the slag is thick but no sticking occurs. Phenomenon, the composition of finished ferrosilicon is qualified. This time, 4020Kg of iron was tapped, and the composition of the finished ferrosilicon was qualified.

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Abstract

The invention relates to a ferrosilicon powder re-smelting technics, which is characterized in that: a ferrosilicon mine heat stove with normal production is selected, molten iron refining package for blowing oxygen at the bottom is prepared, air is input evenly into the bottom blowing package before iron is output and the oxygen and compressed air are blown from the bottom into the package according to proportion of the oxygen and the air in 2.0-12M<3> / h:1.0-6M<3> / h when molten iron flows into the bottom blowing package, special fusing agent is added into the package, wherein the ingredients of the special fusing agent are quartz sand, limestone, oxide skin and fluorite. The weight percentage of the compositions is 40 to 44 : 28 to 35:1 to 5:13 to 20. The adding quantity of the fusign agent is 3wt percent to 5wt percent of the molten iron. Then, the ferrosilicon powder is added into boiling molten mass in the package, wherein the adding quantity of the ferrosilicon powder is 5wt percent to 10wt percent. The invention has the advantages that: the use of the special fusing agent can improve the fluidness of the molten iron, and the incrusting and adhesive packages on the surface of the molten iron are prevented. The invention effectively saves energy, prevents pollution, improves pull rate of products, reduces cost and increases economic benefit of enterprises.

Description

technical field [0001] The invention relates to a ferrosilicon powder remelting process, in particular to a process for remelting ferrosilicon powder into massive ferrosilicon, which is energy-saving and environment-friendly, and belongs to the ferrosilicon powder remelting process technology. Background technique [0002] At present, the known domestic and foreign ferroalloy industries produce a certain amount of ferrosilicon powder when ferrosilicon is produced, processed and crushed. Among them, 3% of ferrosilicon powder is produced by manual crushing, and 7% of ferrosilicon powder is produced by mechanical crushing, resulting in the finished product The rate of production drops, and the cost of product production rises. The ferrosilicon powder remaining after crushing is usually packed in ton bags and sold at a low price. These ferrosilicon powders are prone to secondary dust pollution during packaging and transportation. At present, there is no production enterprise th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/04C22C35/00
Inventor 李巨才
Owner 内蒙古鄂尔多斯冶金有限责任公司