Treatment of waste material

Details Treatment of waste material Treatment of waste material

C - Chemistry, Metallurgy

01

B

23/123, 23/348

C01B 17/60 (2006.01) B01D 53/26 (2006.01) C01B 17/50 (2006.01) C01B 17/58 (2006.01)

Patent

CA 1319492

ABSTRACT A gas mixture including sulphur dioxide is recovered from sulphate waste material by burning a fuel to form a flame zone, introducing sulphate waste material into the zone and introducing pure oxygen or other oxygen-rich gas into the flame zone to support combustion of the fuel and to generate a flame of sufficient temperature to crack solid sulphate waste material and thereby liberate sulphur dioxide therefrom. Solids exiting the flame zone are separated from the gaseous combustion products. The sulphate waste material may be taken from a plant for making titanium dioxide pigment by the sulphate route. MW/NJP/8611 USA

536165

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