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Method for producing microalloy ferro-silicon by using a nickle smelting waste slag electric stove integral deoxidation and reduction

A technology of microalloying and ferrosilicon, applied in the direction of improving process efficiency, etc., can solve the problems of comprehensive utilization of nickel smelting waste slag, waste of resources, etc., and achieve the effect of reducing steelmaking costs and improving steelmaking quality

Inactive Publication Date: 2011-06-29
牛庆君
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is not only a huge waste of resources, but also shows that nickel smelting waste slag has great development and utilization value. However, the comprehensive utilization of nickel smelting waste slag has actually become a worldwide problem

Method used

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  • Method for producing microalloy ferro-silicon by using a nickle smelting waste slag electric stove integral deoxidation and reduction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] a. Using nickel smelting waste slag as iron raw material together with silica and blue carbon to obtain ferrosilicon (containing impurities) at a temperature of 1250 ° C in a molten state through deoxidation reduction method;

[0043] b. Pour ferrosilicon into the molten iron ladle for heat preservation and keep it in a molten state. At the same time, use a graphitized carbon material gas conduit to extend into the bottom of the ladle, and inject chlorine gas (high pressure chlorine gas) into the ferrosilicon at a uniform speed to generate solid residue for purification and removal. Miscellaneous, the amount of chlorine gas is 0.05 cubic meters per ton of ferrosilicon, and the ventilation time is 5 minutes;

[0044] c. Evenly and slightly shake the ladle horizontally for 3 minutes, then let it stand for 2 minutes;

[0045] d. Remove the solid residue;

[0046] e. Remove the heavy metal layer that accounts for 1% of the total weight of the ferrosilicon in the molten sta...

Embodiment 2

[0048] a. Using nickel smelting waste slag as iron raw material together with silica and metallurgical coke to obtain ferrosilicon in molten state at 1700°C through deoxidation reduction method;

[0049] b. Pour ferrosilicon into the molten iron ladle for heat preservation and keep it in a molten state. At the same time, use a graphitized carbon material gas conduit to extend into the bottom of the ladle, and inject chlorine gas into the ferrosilicon at a uniform speed to generate solid residues for purification and removal of impurities. Chlorine gas The dosage is 0.125 cubic meters per ton of ferrosilicon, and the ventilation time is 10 minutes;

[0050] c. Evenly and slightly shake the ladle horizontally for 5 minutes, then let it stand for 4 minutes;

[0051] d. Remove the solid residue;

[0052] e. Remove the heavy metal layer that accounts for 2% of the total weight of the ferrosilicon in the lower layer of the ferrosilicon in molten state.

Embodiment 3

[0054]a. Using nickel smelting waste slag as iron raw material together with quartz and gas coke to obtain ferrosilicon in molten state at 1300°C through deoxidation reduction method;

[0055] b. Pour ferrosilicon into the molten iron ladle for heat preservation and keep it in a molten state. At the same time, use a graphitized carbon material gas conduit to extend into the bottom of the ladle, and inject chlorine gas into the ferrosilicon at a uniform speed to generate solid residues for purification and removal of impurities. Chlorine gas The dosage is 0.1 cubic meters per ton of ferrosilicon, and the aeration time is 7 minutes, or chlorine gas is introduced into the ferrosilicon until the impurity content meets the requirements;

[0056] c. Evenly and slightly shake the ladle horizontally for 4 minutes, then let it stand for 3 minutes;

[0057] d. Remove the solid residue;

[0058] e. Remove the heavy metal layer that accounts for 1.5% of the total weight of the ferrosilic...

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Abstract

The present invention relates to a method for producing microalloy ferro-silicon by using a nickle smelting waste slag electric stove integral deoxidation and reduction, including the steps as follows: a. obtaining a ferro-silicon of a high-temperature molten state by deoxidation and reduction of the nickle smelting waste slag as an iron raw material and other raw material; b. pouring the ferro-silicon into a foundry ladle to insulate to ensure the ferro-silicon to be in the molten state, at the same time infusing chlorine gas into the ferro-silicon to generate solid residue to purify; c. removing the solid residue. For the method of the invention, the nickel smelting waste slag is directly used to replace the iron raw material such as steel shaving, iron scale, sintered ball cluster and the like for the ferro-silicon production, thus it is capable of reducing the dosage of dinas rock or rock quartz; it has been found that the ferro-silicon (FeSi75) produced by the method meets the national standard completely; the invention provides a novel method for producing ferroalloy.

Description

technical field [0001] The invention relates to a method for producing micro-alloyed ferrosilicon by utilizing the overall deoxidation reduction of an electric furnace for nickel smelting waste slag. Background technique [0002] Nickel smelting waste slag is the smelting waste slag discharged during nickel smelting production, and it is a kind of industrial solid waste. With the development of production, solid waste is increasing year by year. A huge amount of nickel smelting waste is stored in the open air in the slag field around the smelting enterprise. Except for a very small amount used as additives in cement plants (replacing iron ore), most of the rest are not used. Being utilized has caused serious environmental protection problems to the surrounding ecological environment and living environment of the enterprise. [0003] After analysis and calculation, the nickel smelting waste slag contains a large amount of iron elements and silicon dioxide, and also contains ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B4/06C22C35/00
CPCY02P10/20
Inventor 牛庆君
Owner 牛庆君
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