Smelting method for silicon calcium alloy

A technology of silicon-calcium alloy and smelting method, which is applied in the field of metallurgy, can solve the problems of large exhaust air volume, high energy consumption, and inability to use it directly, and achieve the effect of improving quality and quality, and high quality

Inactive Publication Date: 2012-07-18
郑州万隆冶金炉料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, this type of product is easy to pulverize, and generally changes from block to powder in about 15 days, and the product that becomes powder cannot be used directly, which increases the cost of steel production
At the same time, due to the use of carbon-based materials in the raw materials: a mixture of caking coal, coke, and semi-coke, the CO 2 The exhaust air volume is huge, which does not meet the requirements of low carbon and environmental protection; and from the beneficial effects of the above patents, it can be seen that the energy consumption per ton of finished products is 7800-9000kwh, and the energy consumption is relatively high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The smelting method of silicon calcium alloy of the present invention, it comprises the following steps:

[0017] The first step is to weigh 30 parts of calcium metal particles with a Ca content of ≥99% and 50 parts of ferrosilicon powder with a Si content of more than 80%; the particle size of the metal calcium particles is 1-30mm, if the particle size is too small, the high temperature The molten liquid will cause the burning loss of the calcium element;

[0018] In the second step, the ferrosilicon powder is put into the intermediate frequency furnace, and the temperature is raised to 1200-1400 ° C and then smelted for 27 minutes;

[0019] In the third step, the metal calcium particles are added to the transfer package, and the melt smelted in the second step is flushed into the transfer package, and then poured into the mold, and after being broken down to room temperature, the Ca content ≥ 30% and the Si content can be obtained. ≥60%, and other impurity contents a...

Embodiment 2

[0029] The first step is to weigh 30 parts of calcium calcium particles with a Ca content of ≥99%, 50 parts of ferrosilicon powder with a Si content of 74-80%, and 20 parts of metal silicon powder with a Si content of ≥97%;

[0030] Among them, the particle size of metal calcium particles is 1-30mm. If the particle size is too small, the high temperature melt will cause burning loss of calcium elements; the particle size of metal silicon powder should be less than 5mm;

[0031] In the second step, the ferrosilicon powder is put into the bottom of the intermediate frequency furnace, the metal silicon powder is placed on the upper layer, and the intermediate frequency furnace is heated to 1200-1400 ° C and then smelted for 27 minutes;

[0032] In the third step, the metal calcium particles are added to the transfer package, and the melt smelted in the second step is flushed into the transfer package, and then poured into the mold, and after being broken down to room temperature, ...

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Abstract

The invention discloses a smelting method for silicon calcium alloy. First raw materials including 40 to 60 parts of silicon iron powder and 15 to 25 parts of metallic silicon powder are fed into a medium frequency furnace, and after the temperature is increased to 1200 to 1400 DEG C, smelting is conducted for 25 to 30 minutes; and an obtained melt liquid is injected into a transfer package containing 25 to 35 parts of metallic calcium grains, and then is poured into a mould and cooled to the ordinary temperature to be crushed, so as to obtain finished silicon calcium alloy. The invention has the advantages as follows: no carbon-based material is used in the raw materials, so that the emission amount of carbon dioxide is low and pollution to the atmospheric environment is avoided; and about 400-degree electricity is consumed for producing one ton of finished silicon calcium alloy, so that the electrical consumption is far lower that that of other smelting methods. In the finished silicon calcium alloy, the contents of silicon and calcium are greatly increased, so that the finished silicon calcium alloy has higher quality, can not be pulverized, and can greatly improve the quality of steel products when used as an additive.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a smelting method of a silicon-calcium alloy used as a composite deoxidizer, a desulfurizer or an additive. Background technique [0002] Silicon calcium alloy is a composite alloy composed of metal silicon, calcium and iron. Calcium and silicon have strong affinity with oxygen, especially calcium, which not only has a strong affinity with oxygen, but also has a strong affinity with sulfur and nitrogen, so silicon-calcium alloy is an ideal composite deoxidizer and desulfurizer. It is widely used in the production of high-quality steel, special steel and special alloys, and can also be used as an inoculant for cast iron and an additive in the production of ductile cast iron. [0003] At present, most silicon-calcium alloys are produced by the electric silicon heating method, that is, using silica, lime, coke, wood block and bituminous coal as raw materials, mixing and smelting...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/10C21C7/06C21C7/064C22C33/08B22D1/00
Inventor 周宏伟罗文斌
Owner 郑州万隆冶金炉料有限公司
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