Trouble-Free Construction of a Large Diameter Waelz Kiln Lining with Increased Life

Resumo

Reasons for formation of large accretions are studied from results of work. A number of high-temperature refractories of magnesia composition are studied, exhibiting the least impregnation by melt reagents, high service temperature, and abrasion resistance. It is established that the most reaction resistant refractory is periclase-carbon fuzed refractory with an increased Cr₂O₃ content (PKhPP). A zone is selected for using PKhPP and combination of sections of PKhPP and PKhS refractories is established. PKhS and PKhPP refractory thermal conductivity is studied. Tests demonstrate absence of accretion formation in the reaction zone, and an increase in Waelz kiln lining life in the Ust-Kamenogorsk Lead and Zinc, and Leninogorsk Polymetal Combines by a factor of 1.6 – 1.8.