Production of refractories from high-chrome waste of ferroalloy production
DOI:
https://doi.org/10.18321/cpc439Keywords:
high-chromium waste, multifunctional refractory, phase composition, multicomponent system of states, drying mode, pressing pressure, firing temperature.Abstract
Waste from the metallurgical industry usually contains valuable mineral components that can apply as raw materials for the extraction of materials for many industries in various areas of production. Ferrochromium wastes are materials consisting of oxides of chromium, silicon, aluminum, iron, calcium, which in the process of processing chromite ores, as a result of melting, are combined into refractory and low-melting multicomponent oxide systems of variable composition. One of the directions of their use is the production of multifunctional refractories: blocks and brick lining of heating units, different mortars, coatings, shotcrete masses – by using
low–chromium waste (slags, recycling waste) and high-chromium waste – cakes (sludge) and bag filter dust (chromium spinel KhShP-01). The article discusses the use of high-chromium wastes from the ferrochrome production of JSC «AFP» (cakes, chromium spinel KhShP-01) of variable phases and mineral composition when combined with refractory magnesite, chamotte scrap and other additives. As a result of the research, a technology has been developed for obtaining products with high refractoriness up to 1750– 1780 oС and strength value of 23.35–36.98 MPa.
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