Multiple furnace core furnace for smelting silicon carbide and its mehtod for producing silicon carbide

A silicon carbide and furnace core technology, applied in furnaces, muffle furnaces, cooking furnaces, etc., can solve problems such as single structure, inability to adapt to the requirements of power supply facilities with various capacities and specifications, production conditions, and inability to adapt to large-scale production.

Inactive Publication Date: 2004-12-22
咸阳新能源材料产业技术研究院有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Before this application, a three-core furnace patent has been applied, its application number is 01106717.9, and the application date is January 15, 2001. This patented technology can reduce energy consumption by more than 10%, and increase the output of a single furnace by 50%. The high-quality products reach more than 60%, and the production also has the advantages of not spraying the furnace, but there are also some problems that are not suitable for large-scale production of the furnace type, the number of furnace cores is small, and the structure is single, and it cannot adapt to the requirements of power supply facilities with various capacities and specifications and different production conditions. and other defects

Method used

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  • Multiple furnace core furnace for smelting silicon carbide and its mehtod for producing silicon carbide
  • Multiple furnace core furnace for smelting silicon carbide and its mehtod for producing silicon carbide
  • Multiple furnace core furnace for smelting silicon carbide and its mehtod for producing silicon carbide

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] a According to the plant structure and power supply facilities, the scale of the production furnace is determined as a single furnace output of 150 tons, and the furnace type is a four-core furnace;

[0048] b Furnace core 3 is a three-dimensional arrangement of four cores (see Figure 2-3 );

[0049] c The section of the furnace core 3 is square, the size is 52×52 cm, and the placement method is three-dimensional parallel placement;

[0050] d Furnace core material is by weight, 83 parts of graphite powder, 6 parts of bituminous coal, 11 parts of silicon dioxide;

[0051]eAccording to the shape and size of the above-mentioned furnace core 3, use 4000 × 600 × 600 parallel partition boxes to assemble the reaction material 2, press the furnace core material to install the furnace core, and wait for the first layer of heat preservation material 1, reaction material 2 and furnace After the core 3 is installed, the clapboard box is proposed with a crane machine. Similarly...

Embodiment 2

[0057] Present embodiment is the method that two furnace core furnaces produce silicon carbide:

[0058] a According to the plant structure and power supply facilities, the scale of the production furnace is determined as a single furnace, the output of a single furnace is 40 tons, and the furnace type is a two-core furnace;

[0059] b Furnace core is two-core three-dimensional arrangement, see Figure 2-1 ;

[0060] c The section of the furnace core is polygonal, and the size is the placement diagram when the diameter of the inscribed circle is equal to 25cm;

[0061] d Furnace core material is by weight, 86 parts of graphite powder, 6 parts of bituminous coal, 5 parts of silicon dioxide, 3 parts of silicon carbide;

[0062] e according to the shape and size of the above-mentioned furnace core, use 4000 * 600 * 600 clapboard boxes to assemble the reaction material, press the furnace core material to install the furnace core, and the others are the same as in embodiment 1; ...

Embodiment 3

[0068] a According to the plant structure and power supply facilities, the scale of the production furnace is determined as a single furnace output of 200 tons, and the furnace type is a five-core furnace;

[0069] b Furnace core is a five-core three-dimensional arrangement, see Figure 2-4 ;

[0070] c The section of the furnace core is rectangular, the size is 36×20cm, and the placement method is vertical placement;

[0071] d Furnace core material is by weight, 92 parts of graphite powder, 5 parts of bituminous coal, 3 parts of silicon dioxide;

[0072] e according to the shape and size of the above-mentioned furnace core, use 4000 * 600 * 600 clapboard boxes to assemble the reaction material, press the furnace core material to install the furnace core, and the others are the same as in embodiment 1;

[0073] f smelting furnace electrode adopts Figure 3-6 trapezoidal section or Figure 3-7 Inverted trapezoidal section, graphite block is used as electrode material;

[...

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Abstract

The silicon carbide smelting furnace comprises heat insulating wall, heat maintaining material, reaction material, two or more plate furnace cores buried inside the reaction material and electrodes. The furnace cores are arranged parallelly or spatially and each of the furnace cores has ends connected to electrodes. The silicon carbide smelting process includes desiging furnace shape; compounding furnace core material with graphite, bitmute, silicon carbide and silicon dioxide; selecting electrode material and shape; and determining the ratio of the reaction material and heat insulating material. The present invention has obvious energy saving effect, high product yield and high product quality.

Description

technical field [0001] The invention relates to a furnace for smelting silicon carbide and a production method thereof. Background technique [0002] At present, silicon carbide is produced in various countries, most of which use one furnace core. This single furnace core production method has a history of more than 100 years. Many countries have tried to improve this backward production method with high energy consumption and low output, and have succeeded so far. At present, there are only some developments in increasing the scale of the furnace body and improving the level of mechanization. These have not fundamentally solved the problem of high energy consumption per unit production, low rate of high-quality products, small single furnace output, and prone to spraying furnaces, which affect production efficiency. and production safety issues. The Soviet patent (SU748104) published in 1980 uses a single-phase AC power supply to connect one end of the furnace core, and th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/36C04B35/56F27B5/14F27D11/00
CPCY02P20/10
Inventor 王晓刚李晓池
Owner 咸阳新能源材料产业技术研究院有限责任公司
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