Method for producing silicon carbide with industrial waste residues

Abstract

The invention discloses a method for producing silicon carbide with industrial waste residues. The industrial waste residues are crushed to obtain raw material particles. The raw material particles are processed with a physical screening separation method and smelting raw materials are obtained. According to different proportions of carbon to silicon, the smelting raw materials and quartz sand are respectively prepared to bottom furnace materials, middle furnace materials and top furnace materials. The bottom furnace materials, the middle furnace materials and the top furnace materials are sequentially conveyed into a multi-furnace-core silicon carbide smelting furnace according to corresponding percent by volume, the smelting furnace is electrified for smelting for 58 to 62 hours, natural cooling is at least for 60 hours, working procedures of digging up, discharging, grading and the like are performed according to existing processes, and silicon carbide is produced. The method for producing silicon carbide with industrial waste residues takes various waste residues and waste coke powder generated by smelting silicon iron, roasting graphite electrode slabs and smelting silicon carbide as main raw materials, adjusts compositions of the raw materials to meet production requirements, is combined with the multi-furnace-core smelting process to produce original blocks of silicon carbide, is capable of meeting the requirement for industrial production of silicon carbide with cheap minerals as raw materials, lowers production cost and energy consumption, and reduces environmental pollution.

Description

technical field [0001] The invention belongs to the technical field of silicon carbide production, and relates to a method for comprehensively utilizing industrial waste resources to produce silicon carbide, in particular to a method for producing silicon carbide by utilizing industrial waste residues. Background technique [0002] From the source of silicon carbide raw materials, many scholars and enterprises have noticed the use of various industrial solid wastes as cheap raw materials for smelting silicon carbide. And made some useful explorations, such as: using siliceous coal gangue and bituminous coal as raw materials, using the traditional Acheson process to synthesize β-SiC micropowder, and using siliceous coal gangue instead of quartz sand and large Petroleum coke and anthracite, which are relatively expensive or scarce in resources, are beneficial to energy saving, consumption reduction and raw material cost reduction, and can realize waste recycling and pollution ...

AI Technical Summary

Problems solved by technology

[0005] Although the above studies have opened up new ways to prepare high-performance silicon carbide materials using cheap mineral raw materials, many methods are still limited to experimental research, and there are few technologies that can really smelt silicon carbide from solid waste produced in industrial production. Industrial production of silicon carbide still mainly uses quartz sand, petroleum coke or high-quality anthracite as raw materials, which has high production costs, high power consumption, serious environmental pollution, and low production efficiency

Images