PROCESS AND APPARATUS FOR CONVERTING SPENT POTLINERS INTO A GLASS FRIT, AND RESULTING PRODUCTS

摘要

A pyrometallurgical process and apparatus for converting spent potliners fr om aluminium manufacturing or other hazardous materials into an amorphous sodiu m and calcium fluroaluminosilicate glass frit and a high carbon material. Spent potliners, silica or siliceous material, and a calcium oxide source are fed into the non-burner e nd of a counter-current rotating kiln. The material is heated to destroy cyanides, convert fluoride salts to calcium fluoride and form a homogeneous liquid material. Carbon is then physically separated from the material. The material is then vitrified to produce a valuable glass frit and a high carbon material.