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Preparation of an environmentally friendly silicon-based additive and its application in refractory materials

A technology of refractory materials and application methods, which is applied in the field of preparation of silicon-based additives for refractory material modification, can solve the problems of troublesome use by refractory material enterprises, large fluctuations in the quality of silicon powder, and low reactivity, etc., to achieve process environmental protection, The effect of low cost and high reactivity

Active Publication Date: 2021-05-28
河南省衡锐佳新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, silicon powder used in refractory materials is made of silica and coke as starting materials, and is produced by high-temperature smelting process in submerged arc furnace. Silicon has high crystallinity, but relatively low reactivity.
Secondly, since the silicon liquid is easily contaminated by the lining of the silicon bag during production, the quality of the silicon powder fluctuates greatly, which brings many troubles and problems to the use of refractory materials enterprises.

Method used

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  • Preparation of an environmentally friendly silicon-based additive and its application in refractory materials
  • Preparation of an environmentally friendly silicon-based additive and its application in refractory materials
  • Preparation of an environmentally friendly silicon-based additive and its application in refractory materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038]Domestic manufacturer A in its blast furnace out of iron ditch Al2O3The environmentally-friendly silicon-based additive and 98-stage metal silicon powder are used in detail as the effect of the antioxidant use, and the test results are shown in Table 1. The water injection of the environmentally-friendly silicon-based additive was carried out frequently (110 ° C × 24 h), and the medium temperature (1100 ° C × 3H) and high temperature (1450 ° C × 3H) were significantly improved, increased at 16.82 ~ 32.53. % Is not. Further, in the high temperature resistance and anti-oxidation resistance, 15.87% and 5.33% of the protocols are also 15.87% and 5.33% properties.

[0039]Table 1 Application Results of the Eating Silicon-Base Addition in Manufacturer A

[0040]

Embodiment 2

[0042]Domestic manufacturer B in its blast furnace out of iron ditch Al2O3The application of environmentally friendly silicon-based additives is made in the Tiegou Iron, the slag line and the falling iron site, respectively, with the 98-level metal silicon powder in the formulation, focusing on comparison. The strength data after the heat treatment after 110 ° C × 24 h and 1450 ° C × 3H, as shown in Table 2. It can be seen that the same conclusions are obtained in three formulations, and the intensity of the formulation of the environmentally friendly silicon-based additive is the normal temperature and high temperature treatment of high temperature treatment, and there is a significant increase in metal silicon powder according to the 98-stage metal silicon powder.

[0043]Table 2 Application Results of Embroofing Silicon-based Additions in Millennium Bases of Manufacturer B

[0044]

[0045]Note: The Trump is different from its different parts of service, so it is optimized in the formula ...

Embodiment 3

[0047]Domestic manufacturers h at its 260 tons of fish thunder slag wire2O3The application test of environmentally friendly silicon-based additives in the -sic-c brick, and the test results are shown in Table 3. It can be seen that the torpedo slag line AL as an environmentally friendly silicon-based additive is an antioxidant.2O3The intensity of the-SiC-C brick has improved, especially the normal temperature withstand voltage strength after high temperature buried charcoal, an increase of 24.9%. Further, in the thermal strength, it is at the same level and slightly 4.3% in the same level and slightly higher with a 98-stage metal silicon powder. In antioxidant, environmentally friendly silicon-based additives are also significantly better than 98-stage metal silica powder, and the two sets of samples are subjected to an environmentally friendly silicon-based product compared to the graphite oxidation rate of 1550 ° C × 3h air. The weight loss rate of the anti-oxidant slag brick solu...

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Abstract

The invention discloses a preparation method of an environment-friendly silicon-based additive and its application method in refractory materials. The invention innovatively uses silicon compound solid waste by-products as starting materials to prepare the raw material of this environment-friendly silicon-based additive. After removal of volatiles by water dissolution and multiple gravity separation and purification, the obtained product is a homogeneous mixture mainly composed of elemental silicon and silicon carbide and ferrosilicon alloy as auxiliary phases; compared with the silicon powder obtained by the traditional melting process, the present invention has The source is more environmentally friendly, the cost is lower, the reactivity is higher, and the oxidation resistance is better; the environmentally friendly silicon-based additive raw material disclosed in the present invention can be used as an antioxidant for carbon-containing refractory materials, and can also be used as a reaction component to participate in A chemical reaction that produces non-oxide phases such as silicon carbide (SiC), silicon nitride (Si3N4), silicon oxynitride (Si2N2O) or Sialon. Due to the unique performance of the environmentally friendly silicon-based additive raw material disclosed in the invention, the performance of the final product is significantly improved.

Description

Technical field[0001]The present invention relates to a refractory material, and more particularly to a silicon compound curvature (commonly known as silicon residue) generated in the production process of trichlorosilicon, polysilicon, single crystal silicon. The preparation method of silicon-based additives can be prepared as a refractory material and its application methods.Background technique[0002]Single crystal silicon is the most important semiconductor material, which is widely used in electronic information, new energy and other industries. Single crystal silicon is prepared by special melt-calculated processes, and polysilicon is used as a starting material of single crystal silicon, and its production process is to react the high-purity industrial silicon powder with HCl, processed into SIHCl.3(Trichloride), let trichloride in H2Reduction of polysilicon in the reducing furnace of the atmosphere. In the actual production, the reactivity rate of trichlorome silicon is low, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/626C04B35/66
CPCC04B35/62605C04B35/66C04B2235/3206C04B2235/3217C04B2235/3826C04B2235/405C04B2235/422C04B2235/428C04B2235/77C04B2235/96C04B2235/9615C04B2235/9684
Inventor 吕路线赵建设
Owner 河南省衡锐佳新材料科技有限公司
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