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Method for processing raw materials for producing ferra silicon alloy, silico-calcium and monocrystalline silicon

A processing method and technology of single crystal silicon, applied in the field of smelting, can solve the problems of slow chemical reaction speed, limited contact area, affecting output, etc., and achieve the effects of short chemical reaction time, low energy consumption of products, and fast melting speed.

Inactive Publication Date: 2007-09-26
吴兴明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the smelting of ferrosilicon and calcium silicon is to crush the carbon raw material to a particle size of 10-30mm. Silica: processed into a block of 40-120mm in a large-capacity electric furnace, and processed into a block of 25-80mm in a small-capacity electric furnace below 3000kva Shape, according to a certain proportion of silicon dioxide and carbon into the furnace for production, using this raw material for production, because coal, silica and other raw materials have a certain particle size, especially coal, which will never melt in the smelting furnace, when silica, silica, etc. After the lime is melted, the chemical reaction can only be carried out on the surface of the coal and gradually enters the pores of the coal. In this way, the contact area of ​​the reactant is very limited, so the chemical reaction speed is relatively slow, which seriously affects the output and is accompanied by the reduction of energy consumption. Improvement, using the current raw materials to produce the general daily output is 20-25 tons, the power consumption per ton is 8400-9000kvA, and the power consumption per ton of silicon-calcium is 13000kvA; it can be seen that the raw materials produced by the current processing method have a very high power consumption. High, serious waste of energy, and low output

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: according to weight ratio is SiO 2 : C=1: the ratio of 0.4~0.6, silicon dioxide and the carbon raw materials whose weight is 50% of coke, 30% of anthracite, and 20% of petroleum tar are pulverized to 200~300 mesh fines respectively, and weight 1-3% pure starch glue, then add 1-5% water of the weight of the ball, then stir it evenly with a mixer, then press it through a double-roll forming machine, and then dry it in the natural environment ,dry.

Embodiment 2

[0018] Embodiment 2: SiO according to weight ratio 2 : C=1: The ratio of 0.4~0.6, the silicon dioxide and the carbon raw materials whose weight is 50% of coke and 50% of anthracite are pulverized to fine powder of 200~300 meshes respectively, and the weight percentage content is 1 -3% pure starch glue, then add 1-5% of the water content of the ball weight, then stir it evenly with a mixer, then press it through a double-roll forming machine, and then dry it in the natural environment.

Embodiment 3

[0019] Embodiment 3: SiO according to weight ratio 2 : C=1: The ratio of 0.4~0.6, silicon dioxide and carbon raw materials with weight of 50% coke, 40% anthracite and 10% wood chips are pulverized to 200~300 mesh fines respectively, wherein the carbon content of wood chips is 15% %, first add pure starch glue with a weight percentage of 1-3%, and then add 1-5% water of the ball weight, then stir it evenly with a mixer, and then press it through a double-roller forming machine. , and then hang and dry in the natural environment.

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Abstract

This invention relates to a method for processing a raw material of producing silicon iron, calcium silicon and monocrystal silicon characterizing in crushing SiO2 and carbon raw materials into 200-300 meshes in th weight ratio of SiO2:C=1: (0.4-0.6) into fine powder, in which, pure starch gel in the weight percentage of 1-3% and water in 1-5% of the weight of balls are added in it to be mixed uniformly then to be pressed to moulding by a double-roll moulding machine then to be dried in the sun.

Description

technical field [0001] The invention relates to the technical field of smelting, in particular to a method for processing raw materials for producing ferrosilicon, calcium silicon and single crystal silicon in an electric smelting furnace. Background technique [0002] At present, the smelting of ferrosilicon and calcium silicon is to crush the carbon raw material to a particle size of 10-30mm. Silica: processed into a block of 40-120mm in a large-capacity electric furnace, and processed into a block of 25-80mm in a small-capacity electric furnace below 3000kva Shape, according to a certain proportion of silicon dioxide and carbon into the furnace for production, using this raw material for production, because coal, silica and other raw materials have a certain particle size, especially coal, which will never melt in the smelting furnace, when silica, silica, etc. After the lime is melted, the chemical reaction can only be carried out on the surface of the coal and gradually...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/14C22B5/10
Inventor 吴兴明
Owner 吴兴明