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Method for producing ferro-silicon by using a ferrous metasilicate electric stove integral deoxidation and reduction

A technology of ferrous silicate and electric furnace, which is applied in the field of producing ferrosilicon by the overall deoxidation and reduction of ferrous silicate electric furnace, which can solve the problems of comprehensive utilization and waste of resources, and reduce production costs, reduce production power consumption, and reduce emissions Effect

Inactive Publication Date: 2011-05-04
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 and copper smelting waste slag have great development and utilization value. However, the comprehensive utilization of nickel and copper smelting waste slag has actually become a worldwide problem

Method used

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  • Method for producing ferro-silicon by using a ferrous metasilicate electric stove integral deoxidation and reduction
  • Method for producing ferro-silicon by using a ferrous metasilicate electric stove integral deoxidation and reduction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] a. Heating nickel smelting waste slag to a molten state of 1150°C;

[0048] b. Place it in the hot slag bag and keep it warm at 1150°C. At the same time, extend the graphitized carbon material gas conduit into the bottom of the hot slag bag to feed oxygen (high pressure oxygen) into the nickel smelting waste slag. The amount of oxygen used is per ton of nickel smelting The waste residue is 0.4 cubic meters, and the oxygen flow is controlled at a uniform speed, and the ventilation time is 5 minutes;

[0049] c. Evenly and slightly shake the hot slag bag horizontally for 30 minutes, then let it stand for 8 minutes;

[0050] d. Remove the solid residue generated on the upper layer of the nickel smelting slag;

[0051] e. Cool the remaining part (mainly ferrous silicate), and then crush it to make balls of suitable size according to the existing ferrosilicon smelting requirements;

[0052] f. Then ferrous silicate pellets are used as iron raw materials together with silic...

Embodiment 2

[0054] a. Heating nickel smelting waste slag to a molten state of 1300°C;

[0055] b. Place it in the hot slag bag and keep it warm at 1300°C. At the same time, extend the graphitized carbon material gas conduit into the bottom of the hot slag bag to feed oxygen into the nickel smelting waste slag. The amount of oxygen used is 1 cubic meter per ton of nickel smelting waste slag. m, control the flow of oxygen at a constant speed, and the ventilation time is 10 minutes;

[0056] c. Evenly and slightly shake the hot slag bag horizontally for 40 minutes, then let it stand for 12 minutes;

[0057] All the other parts are identical with embodiment 1.

Embodiment 3

[0059] a. Heating copper smelting waste slag to a molten state of 1200°C;

[0060] b. Place it in the hot slag bag and keep it warm at 1200°C. At the same time, extend the graphitized carbon material gas conduit into the bottom of the hot slag bag to feed oxygen into the copper smelting waste slag. The amount of oxygen used is 0.8 cubic meters per ton of copper smelting waste slag m, control the flow of oxygen at a constant speed, and the ventilation time is 8 minutes;

[0061] c. Evenly and slightly shake the hot slag bag horizontally for 35 minutes, then let it stand for 10 minutes;

[0062] All the other parts are identical with embodiment 1.

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Abstract

The present invention relates to a method for producing ferro-silicon by using a ferrous metasilicate electric stove integral deoxidation and reduction, including the steps as follows: a. heating a nickel smelting waste slag, a copper smelting waste slag or a nickel, copper and cobalt smelting waste slag to a molten state, or fetching the nickel smelting waste slag, the copper smelting waste slagor the nickel, copper and cobalt smelting waste slag of the molten state to place in a thermal slag ladle directly; b. holding the waste slag in the molten state by heat insulation, at the same time infusing oxygen or air into the waste slag to react to generate solid residue to purify; c removing the solid residue; d. cooling the remained part and then crushing; e. producing the ferro-silicon through the deoxidation and reduction of the remained part as iron raw material and other raw material. For the method of the invention, firstly the waste slag is purified, then the purified copper smelting waste slag may be 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 comprehensive utilization technology of non-ferrous metal smelting waste slag, in particular to a method for producing ferrosilicon through integral deoxidation reduction of a ferrous silicate electric furnace. Background technique [0002] Nickel and copper smelting slag is the smelting slag discharged from nickel and copper 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 and copper smelting slag is stored in the open air in the slag field around the smelting enterprise. Some of them have not been utilized, which has caused serious environmental protection problems to the surrounding ecological environment and human settlements of the enterprise. [0003] After analysis and calculation, the nickel and copper smelting waste slag contains a large amount of iron elements and silicon dioxide, and also contains a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B11/10
CPCY02P10/20
Inventor 牛庆君王振峰
Owner 牛庆君
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