Bayer calcining method of one kind of alkaline red mud dry

The present invention provides a method of calcining Bayer process red mud base of a dry method, comprising the steps of: using a base mud, limestone powder, bauxite powder and soda ash ingredients, thoroughly mixed, dried sintered into the rotary kiln, and ground; clinker milled powder was added to adjust the dissolution, the dissolution of the residue obtained after 5 to 7 times the reverse sufficient washing slag stockpiling; clinker powder obtained eluted solution was mixed and dissolved sodium aluminate crystals after removal of silicon, aluminum hydroxide solution off the silicon seed crystal obtained was seeded decomposed liquor seeded in two steps was evaporated and desalt. The present invention is directed problems difficult to handle a large number of red mud base, based on conventional alumina sintering, made alkaline dry calcined red mud techniques, using whole seeded process, so that one third of the reduced sintering process above, integrated calculation with Seeds rate increased to 90%, reducing the difficulty of the operation, put personnel and equipment to reduce energy consumption is reduced.