Method for recycling crystalline alkali in unrefined solution full confluence production by sintering process

Abstract

The invention provides a method for recycling a crystalline alkali in unrefined solution full combination production by a sintering process. In the method, the crystalline alkali of a Bayer process system is dissolved by using sintering process red mud primary cleansing solution; and the primary cleansing solution in which the crystalline alkali is dissolved is used as correction liquor for the dissolution of clinker. The method has the advantages of not only avoiding futile cycle of aluminum oxide and caustic alkali in crystalline alkali adhesion solution when ingredients are sintered, but also contributing to the transportation of alkaline red mud and the relief of labor intensity of manually dissolving alkalis.

Description

technical field [0001] The invention relates to a method for recovering and utilizing crystallized alkali in the full confluence production of crude liquid in sintering method. Background technique [0002] The global financial crisis has greatly reduced the price of alumina. In order to control losses and increase profits, Shanxi Branch decisively implemented the low-aluminum-silicon ratio clinker sintering technology, and the sintering method coarse liquid full confluence production technology—that is, the sintering method coarse liquid does not Then use the traditional coarse liquid medium-pressure desiliconization technology, but all merge with the high-pressure dissolution red mud slurry of the Bayer process to desilicate in the diluted tank of the Bayer process, thus canceling the carbon decomposition process in the traditional sintering process. It not only shortens the production process, but also saves electricity and new steam, and greatly reduces production costs....

AI Technical Summary

Problems solved by technology

Since the sodium carbonate in the crude liquid of the sintering method enters the Bayer process and then crystallizes out, and then goes to the sintering method for batching, the aluminum oxide and caustic alkali in the crystallization alkali attachment liquid circulate ineffectively, and the energy consumption increases

Simultaneously, because of the allocation of no carbon fraction mother liquor, the sintering method stripping process adopts artificial alkali to ensure the concentration of sodium carbonate (see figure 1 Shown original process flow chart), increased labor intensity

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