HEATING AUTOCLAVE Russian patent published in 2004 - IPC

FIELD: heat- and mass-exchange processes; production of alumina; autoclave leaching of aluminum-containing mineral raw material, for example, bauxite by circulating solution. SUBSTANCE: proposed heating autoclave has vertical cylindrical housing with pulp supply branch pipe fitted in lower portion of housing, steam supply branch pipe, pulp discharge branch pipe and circulating pipe mounted coaxially in housing. Pulp supply branch pipe is provided with nozzle whose upper end face is located below lower edge of circulating pipe; steam supply branch pipe located in lower portion of circulating pipe is provided with collector having nozzles over its perimeter; pulp discharge branch pipe is inclined downward and its upper end is located above upper edge of circulating pipe. EFFECT: increased productivity by final product; low cost of process. 3 cl, 2 dwg