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Silicon carbide smelting process

A silicon carbide and process technology, applied in silicon carbide, carbide and other directions, can solve the problems of high energy consumption, high production cost and low quality of silicon carbide smelting

Active Publication Date: 2018-10-16
宁夏和兴碳基材料有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] This application provides a silicon carbide smelting process to solve the problems of high energy consumption, high production cost, loose density and low quality of silicon carbide products

Method used

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  • Silicon carbide smelting process
  • Silicon carbide smelting process
  • Silicon carbide smelting process

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Embodiment Construction

[0032] Please refer to the attached figure 1 , which shows the flow of the silicon carbide smelting process provided by this application.

[0033] A silicon carbide smelting process, including four processes, respectively:

[0034] (1) Material preparation: select carbonaceous materials and quartz sand; mix carbonaceous materials and quartz sand according to the preset ratio to form smelting raw materials; the preset ratio includes 12 kinds of ratios, corresponding to the first to the twelfth The raw materials of the sub-materials, 12 kinds of sub-materials together form the smelting raw materials.

[0035] (2) Furnace loading process includes: Step S1 Carry out the first to fourth batches in the furnace along the vertical direction in sequence, and before that, add a preset weight of water to the raw materials of the corresponding batches.

[0036] Step S2 installs the partition box, and the partition box is installed on the raw materials of the first to fourth parts in S1....

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Abstract

The invention provides a silicon carbide smelting process and relates to the technical field of silicon carbide smelting. The process comprises steps of material preparation, charging process and smelting process, wherein for material preparation, sectional-material raw materials in various ratios constitute smelting raw materials; the charging process comprises sequential implantation of first-twelfth sections of materials, and steps of placing and drawing a partition box, making a furnace core and making burners are included in the charging process; in the smelting process, power transmission is performed in three stages, power transmission is performed under power of 20,000-25,000 kW in a first stage, and operation continues for 48 h; in a second stage, power transmission power is gradually and stably increased to 32,000-36,000 kW within 12 h; in a third stage, 32,000-36,000 kW is kept unchanged, and operation continues for 7-9 d. Power supply is stopped after the designed total power transmission power, and natural cooling is performed. According to the silicon carbide smelting process, by controlling the ratios of the sectional-material raw materials, the charging process andthe smelting process, power consumption of each ton of products is low, production cost is low, bumps of a crystallization cylinder after smelting are avoided, the silicon carbide products are high indensity and quality, and output of first-grade products is high.

Description

technical field [0001] The present application relates to the technical field of silicon carbide smelting, in particular to a silicon carbide smelting process. Background technique [0002] Silicon carbide has good chemical stability, high thermal conductivity, low thermal expansion coefficient, good wear resistance and other advantages, and is widely used in smelting, semiconductor, aerospace, military industry, precision instruments and other fields. At present, the synthesis of silicon carbide is mainly prepared by phlegm heat reduction method. [0003] The carbothermal reduction method uses an Acheson furnace for smelting. The Acheson furnace is a resistance furnace with a carbonaceous material as the core, and the quartz (SiO 2 ) and carbon to form silicon carbide. During the smelting process, the electric resistance furnace is continuously energized, and the temperature of the furnace core rises. After reaching a certain temperature, the heat is transferred from the ...

Claims

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Application Information

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IPC IPC(8): C01B32/97
CPCC01B32/97
Inventor 顾文华顾旭徐世杰万立斌
Owner 宁夏和兴碳基材料有限公司
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