Converting spent potliners into a glass frit

Details Converting spent potliners into a glass frit Converting spent potliners into a glass frit

C - Chemistry, Metallurgy

03

B

C03B 1/00 (2006.01) C04B 7/24 (2006.01)

Patent

CA 2536428

A pyrometallurgical process and apparatus for converting spent potliners from aluminium manufacturing or other hazardous materials into an amorphous sodium and calcium fluroaluminosilicate glass frit and a high carbon material. Spent potliners, silica or siliceous material, and a calcium oxide source are fed into vessel such as an electric melting furnace. The material is heated and melted 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. Optionally, prior to melting, the material is heated in a rotary kiln.

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