Ferrosilicon nitride mullite silicon carbide brick for silicomanganese alloy ladle and preparation method of ferrosilicon nitride mullite silicon carbide brick

Abstract

The invention relates to a ferro-silicon nitride mullite silicon carbide brick for a silicon-manganese alloy ladle and a preparation method of the ferro-silicon nitride mullite silicon carbide brick, and belongs to the technical field of silicon-manganese alloy ladle linings. The silicon iron nitride mullite silicon carbide brick is prepared from the following raw materials in percentage by mass: 15 to 20 percent of 5 to 3 mm alumina, 15 to 25 percent of 1 to 0 mm alumina, 19 to 24 percent of 0.074 mm alumina fine powder, 18 to 26 percent of 3 to 1 mm mullite, 1 to 5 percent of 1 to 0 mm silicon carbide, 2 to 8 percent of 0.074 mm silicon carbide fine powder, 2 to 6 percent of 0.074 mm alumina powder, 1 to 4 percent of 0.074 mm silicon iron nitride, 4 to 9 percent of 0.074 mm Guangxi white mud and 1 to 2 percent of 0.074 mm metal silicon powder. The product provided by the invention has excellent slag corrosion resistance, melt scouring resistance and thermal shock resistance, and the service life is obviously prolonged; meanwhile, the invention provides a preparation method beneficial to industrial production.

Description

technical field [0001] The invention relates to a ferrosilicon nitride mullite silicon carbide brick coated with a silicon-manganese alloy and a preparation method thereof, belonging to the technical field of silicon-manganese alloy lining. Background technique [0002] At present, silicon-manganese alloy is an alloy composed of manganese, silicon, iron and a small amount of carbon and other elements. It is a ferroalloy with wide application and large output. Manganese-silicon alloy is a compound deoxidizer commonly used in steelmaking, and it is also a reducing agent for the production of medium and low carbon ferromanganese and the production of metal manganese by electrosilicothermal method. The market demand is huge. [0003] The traditional silicon-manganese alloy-packed refractory bricks for smelting silicon-manganese alloys generally use high-alumina bricks, high-alumina silicon carbide bricks, etc., and their resistance to slag erosion, melt erosion and thermal shock...

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Problems solved by technology

[0003] The traditional silicon-manganese alloy-packed refractory bricks for smelting silicon-manganese alloys generally use high-alumina bricks, high-alumina silicon carbide bricks, etc., and their resistance to slag erosion, melt erosion and thermal shock resistance are all there Insufficient, so the service life is not high, the average package age is low, and the alloy package is frequently repaired, which restricts the efficient and stable production of silicon-manganese alloys

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