Circulating mother liquor feeding device for producing aluminum oxide and feeding method

Abstract

The invention belongs to the technical field of aluminum oxide production, and particularly relates to a circulating mother liquor feeding device for producing aluminum oxide and a feeding method. According to the circulating mother liquor feeding device, a static mixer is horizontally installed on the top of a circulating mother liquor groove to make evaporation mother liquor and caustic soda liquid which come from an evaporator station enter from one end of the static mixer, the discharging position is 5 m or above higher than the tops of the mother liquor groove and a desilicication groove, circulating mother liquor automatically flows to the process of raw material grinding and predesilicification by means of residual pressure and a height difference, and the circulating mother liquor groove is only used for temporary storing when the evaporator station is shut down for maintenance. According to the circulating mother liquor feeding device and the feeding method, the process is simplified, the number of power devices is decreased, the energy is saved, the consumption is reduced, the workload of repair and maintenance is reduced, input of pipelines, valves, pipe fittings and the like is reduced, the investment is reduced, the construction investment can be reduced by about three million RMB, and the operating cost is reduced by about 5.65 million RMB.

Description

technical field [0001] The invention belongs to the technical field of alumina production, and in particular relates to a feeding device and a feeding method for circulating mother liquor in alumina production. Background technique [0002] The circulating mother liquor feeding system in the traditional alumina production process is to send the evaporated mother liquor and liquid caustic soda into the blending and mixing tank for mixing and blending, and the qualified mother liquor enters the circulating mother liquor tank for temporary storage, and then discharges from the bottom of the circulating mother liquor tank It is transported to the raw material mill and pre-desilication section through the circulating mother liquor pump. The process flow of the traditional circulating mother liquor feeding system is shown in the attached drawing of the manual. figure 1 . [0003] With the rapid development of the alumina industry and the continuous expansion of the scale of singl...

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Problems solved by technology

[0003] With the rapid development of the alumina industry and the continuous expansion of the scale of single-line alumina, it has become a trend to increase the size of the tank. The increase in the height and diameter of the tank makes the basic production of

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