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Composite ceramic-phase anti-seepage wear-resistant material produced from polysilicon wastes and used for copper chute

A technology of polysilicon waste and composite ceramics is applied in the field of refractory materials for copper chutes of Ausmelt copper smelting furnaces or aluminum melting furnaces, which can solve the problems of copper liquid slag and water erosion, pollution of the surrounding environment of enterprises, and high maintenance labor intensity, etc. problems, to achieve the effect of reducing porosity, flexible construction, and convenient maintenance

Active Publication Date: 2019-11-08
洛阳市科创绿色建材研究院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, magnesia-chrome bricks are commonly used in the working layer of the copper chute of the Osmet furnace at home and abroad. This kind of brickwork generally has several shortcomings in use; the service life is short and the effect is poor. Generally, the service life is one week. Copper liquid slag and water erosion are serious, refractory material loss is serious, and the cost is high; the integrity is poor, due to the existence of chromium, the air is extremely polluted; the later maintenance is labor-intensive, requiring many personnel, and the labor cost is extremely high
[0003] In recent years, with the rapid growth of my country's polysilicon industry, the industrial by-products of polysilicon production have also increased sharply. Due to excessive investment and unqualified treatment technology, most enterprises currently use simple treatment and then deep burial, which seriously pollutes the surrounding area of ​​the enterprise. environment of

Method used

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  • Composite ceramic-phase anti-seepage wear-resistant material produced from polysilicon wastes and used for copper chute
  • Composite ceramic-phase anti-seepage wear-resistant material produced from polysilicon wastes and used for copper chute
  • Composite ceramic-phase anti-seepage wear-resistant material produced from polysilicon wastes and used for copper chute

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A method for preparing a composite ceramic phase anti-seepage wear-resistant material for a copper chute produced by polysilicon industrial waste is as follows:

[0038] Step 1. Dry the polysilicon industrial waste sediment first, grind it finely, and put it into a nitriding furnace (N 2 Atmosphere protection furnace) at 1100°C for 24 hours for nitriding treatment to obtain waste slag after nitriding treatment. The waste slag after nitriding treatment includes 55% silicon nitride content and 15% silicon carbide content;

[0039] Step 2: Take 20 parts by weight of waste slag after nitriding treatment, 67 parts by weight of silicon carbide raw material, and 13 parts by weight of binder, put them into a forced mixer for pre-mixing for 10-15 minutes, and add the mixed materials Water, the addition of water is 5% of the total weight of the original material, and the addition of composite additives is 16% of the total weight of the original material; continue to stir for 5-10...

Embodiment 2

[0047] A method for preparing a composite ceramic phase anti-seepage wear-resistant material for a copper chute produced by polysilicon industrial waste is as follows:

[0048] Step 1. Dry the polysilicon industrial waste sediment first, grind it finely, and put it into a nitriding furnace (N 2 Atmosphere protection furnace) at 1300°C for 24 hours for nitriding treatment to obtain waste slag after nitriding treatment. The waste slag after nitriding treatment includes silicon nitride content of 65% and silicon carbide content of 20%;

[0049] Step 2: Take 22 parts by weight of waste slag after nitriding treatment, 66 parts by weight of silicon carbide raw material, and 12 parts by weight of binder, put them into a forced mixer for pre-mixing for 10-15 minutes, and add the mixed materials Water, the addition of water is 8% of the total weight of the original material, and the addition of the composite additive is 12% of the total weight of the original material; continue to stir...

Embodiment 3

[0057] A method for preparing a composite ceramic phase anti-seepage wear-resistant material for a copper chute produced by polysilicon industrial waste is as follows:

[0058] Step 1. Dry the polysilicon industrial waste sediment first, grind it finely, and put it into a nitriding furnace (N 2 Atmosphere protection furnace) at 1100-1300°C for 24 hours for nitriding treatment to obtain waste slag after nitriding treatment. The waste slag after nitriding treatment includes silicon nitride content of 55-65%, silicon carbide content of 15-25% %;

[0059] Step 2: Take 24 parts by weight of waste slag after nitriding treatment, 60 parts by weight of silicon carbide raw material, and 16 parts by weight of binder, put them into a forced mixer for pre-mixing for 10-15 minutes, and add the mixed materials Water, the addition of water is 10% of the total weight of the original material, and the addition of composite additives is 16% of the total weight of the original material; continu...

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Abstract

The invention discloses an SiC / Si3N4 composite ceramic material with small thermal expansion coefficient, low porosity, good thermal shock stability and wear resistance, excellent copper slag, aluminum slag and chemical gas permeation resistance, good integrity and long service life and a preparation method thereof. According to the invention, a raw material of the SiC / Si3N4 composite ceramic material is prepared by the following steps: drying and grinding a waste residue obtained by precipitating a polycrystalline silicon slicing waste liquid, carrying out nitridation treatment at 1100-1300 DEG C, adding a certain amount of SiC as a supplementary material, adding a composite additive and water, carrying out pouring, carrying out maintaining at normal temperature, and carrying out heatingand baking at 200-300 DEG C. The SiC / Si3N4 composite ceramic material not only prolongs the production chain of the polycrystalline silicon industry, but also solves the bottleneck problem of development of refractory materials in the non-ferrous metal smelting industry, and is easy for large-scale industrial popularization and application and for industrialization.

Description

technical field [0001] The invention relates to a refractory material for the copper chute of the Osmelt copper smelting furnace or the aluminum melting furnace, in particular to a SiC / Si produced from an industrial waste for the copper chute of the Osmelt copper smelting furnace or the aluminum melting furnace 3 N 4 Composite ceramics combined anti-seepage wear-resistant material and its preparation method. Background technique [0002] Osmelt furnace is a high-intensity molten pool melting system based on sulfide, metal components, iron oxide and oxygen in the material, and its core technology is submerged lance top blowing technology (TSL). In recent years, the TSL copper smelting process has become more and more mature. Due to its remarkable advantages such as high efficiency, simple equipment, easy operation, strong adaptability of raw materials and meeting strict environmental protection requirements, it has become one of the most advanced molten pool smelting copper ...

Claims

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Application Information

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IPC IPC(8): C04B35/565C04B35/622C04B35/626C04B35/66
CPCC04B35/565C04B35/62204C04B35/6265C04B35/66C04B2235/3418C04B2235/3217C04B2235/428C04B2235/46C04B2235/3873C04B2235/77C04B2235/96C04B2235/9615C04B2235/9676
Inventor 王黎廖桂华李金锋钟俊鹏陈文清
Owner 洛阳市科创绿色建材研究院
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