Patent ID: 6946105
Filing Date: 2005-09-20
Classification: B01J,C01B,C01G,C01P,C23G,F26B,Y10S

Abstract:
1. A spray roasting reactor for recovering metal oxide particles, said reactor comprising: a single chamber having an inlet end, a discharge end, an upper portion defining a first heating zone and a lower portion defining a second heating zone; a liquid supply at said inlet for feeding a solution containing metal compounds into said chamber; a first heat source coupled to said chamber for heating said solution in said first heating zone to a first temperature to form metal salts; a second heat source coupled to said chamber downstream of said first heating zone to heat said metal salts in said second heating zone to a temperature to convert said metal salts to metal oxides, where said second temperature is higher than said first temperature; and a discharge device for discharging said metal oxide particles from said second heating zone at said discharge end.