Complex processing of aluminum-containing waste with production of alumina, coagulants, and building materials

摘要

Physicochemical bases and techniques for processing aluminum-containing wastes (hydroalumocarbonate sediments, underslime waters, foundry slag, slimes, catalysts, mineral part of coals) to produce alumina, coagulants for purifying drinking and sewage waters, rare metals and building materials in using acidic, chloride, and thermal-electric methods were developed. Physicochemical bases of processing of aluminum-containing waste include studying the kinetics of interacting the main components of the waste with alkali, acids, and chlorine; properties of aluminate, sulfate, nitrate, and chloride systems containing aluminum, iron, alkali elements, and rare metals; separation of aluminum compounds in water solutions from iron and silicon oxides; determination of chemism and mechanism of transfer of sulfates into aluminates in decomposing sulfate compounds of aluminum, potassium, and sodium; extraction of germanium, scandium, gallium, zirconium, and other minor impurities from the waste for the purpose of more complex use of them.