A composite ceramic phase anti-seepage and wear-resistant material for copper chute produced from polysilicon waste

A technology of polysilicon waste and composite ceramics, which is applied in the field of refractory materials for copper chute of Osmelt copper smelting furnace or aluminum melting furnace. problems, achieve the effect of reducing porosity, flexible construction and convenient maintenance

Active Publication Date: 2022-01-07
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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  • A composite ceramic phase anti-seepage and wear-resistant material for copper chute produced from polysilicon waste
  • A composite ceramic phase anti-seepage and wear-resistant material for copper chute produced from polysilicon waste
  • A composite ceramic phase anti-seepage and wear-resistant material for copper chute produced from polysilicon waste

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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 a SiC / Si with small thermal expansion coefficient, low porosity, good thermal shock stability and wear resistance, excellent resistance to copper slag, aluminum slag and chemical gas permeability, good integrity and long service life 3 N 4 Composite ceramic material and its preparation method. The raw material of the present invention is the waste slag after the precipitation of the polysilicon slice waste liquid, which is dried, ground, and nitrided at 1100-1300°C. A certain amount of SiC is added as a supplementary raw material, and compound additives and water are added. Casting and curing at room temperature , obtained after heating and baking (200-300°C). The invention not only lengthens the production chain of the polysilicon industry, but also solves the bottleneck problem in the development of refractory materials in the nonferrous metal smelting industry, and is easy for large-scale industrial promotion, use and 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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Patent Type & Authority Patents(China)
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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