The Use of Aluminum-Containing Waste From the Production of Metallic Chromium to Create Acid-Resistant Tiles

Abstract

The use of aluminum-containing slag from the production of metallic chromium in an amount of 40 % allows to obtain acid-resistant tiles with high physical, mechanical and chemical parameters at a firing temperature of 1300 ?C. Studies have shown that the introduction of slag containing more than 70 % aluminum oxide and more than 8 % chromium oxide (trivalent) into the compositions of ceramic masses promotes the formation of high-temperature minerals: corundum (2050 ?C) and (III) Сr2О3 (sesquioxide, the mineral escolaite in nature), which has a melting point of 2435 ?C, which significantly increases the refractoriness of acid-resistant tiles.