Dealkalizing device for red mud

Abstract

The invention discloses a dealkalizing device for red mud. The dealkalinzing device comprises a stirring tank and an ion exchange column, wherein the stirring tank comprises a tank body, a feeding hole, a stirrer and an overflowing pipe; the bottom part of the tank body is of an inverted conical structure, the top part of the tank body is of an inverted conical platform structure and the middle part of the tank body is of a hollow cylinder structure; the feeding hole is positioned at the top part of the tank body; the stirrer is arranged in a hollow cavity body of the tank body; the overflowing pipe is arranged at the middle part of the tank body; a pulp feeding pipe is arranged on the side wall of the inverted conical structure section of the lower part of the tank body; a discharging pipe and a butterfly valve are arranged at the bottom of the inverted conical structure section; the overflowing pipe is connected with an absorbing-liquid inlet pipe arranged at the top part of the ion exchange column by an overflowing valve, a water pump and a connecting pipeline; the ion exchange column comprises a column body, resin in a cavity body of the column body, a desorption-liquid outlet pipe arranged at the top of the column body, an absorbing-tail-liquid outlet pipe positioned at the bottom of the column body and a desorption-liquid inlet pipe connected with an agent water storage pool. The dealkalizing device disclosed by the invention has the advantages that the dealkalizing efficiency is high, the operation is simple, strong alkaline can be resisted, and integrated and continuous production of dealkalization, solid-liquid separation, concentration, enrichment and recovery of sodium ions can be realized.

Description

Technical field [0001] The invention belongs to the technical field of desalination devices, and specifically relates to a red mud desalination device. Background technique [0002] Red mud is the tailings produced in the process of alumina production from bauxite. Among them, Bayer process red mud is a strong alkaline pollution source, and its mineral composition and chemical composition are more complex. The accumulation of red mud to build a dam will not only cause groundwater and soil pollution, but also because of the extremely fine particle size of the red mud, it will also cause air pollution with the wind. Therefore, effective measures must be taken to deal with this type of solid waste (Nan Xiangli, Zhang Ting'an, Liu Yan, etc. Analysis of Comprehensive Utilization of Red Mud in my country. Chinese Journal of Process Engineering, 2010, 10(S1): 23-28). In the treatment process, dealkalization is an indispensable step. At present, the red mud dealkalization process mainly...

AI Technical Summary

Problems solved by technology

The red mud raw materials for these processes all come from the red mud tailings dam, and there is no direct treatment of the red mud slurry discharged from the aluminum smelter. After dealkalization, the red mud sl

Images