Alumina factory, alkaline production method Appropriate chemical industry

at present, there are many kinds of production methods of alumina on the market, the next, small make up to introduce, under the condition of alkaline alumina factory production methods.

alumina factory USES the basic principle of alkaline production method is to make the ore of alumina and alkali reaction to generate sodium aluminate under the certain condition, the impurities such as silica and iron oxide in the ore separation, and then use the pure aluminum hydroxide precipitation of sodium aluminate solution decomposition, finally get calcined alumina.

alkaline alumina production method is divided into bayer process, sintering process and the combined method.

bayer process is directly with caustic soda as mother liquor processing bauxite, separation of sodium aluminate solution, then sodium aluminate solution in alumina factory will stir, filter and so on aluminum hydroxide, alumina after roasting, mother liquor can deal with the next batch of ore.

the sintering process of alumina factory mainly is to blend, alkali powder ore, limestone, advanced high temperature sintering, the ore in the alumina production of solid sodium aluminate, ferric oxide and silicon dioxide generated the corresponding salt, dissolution sintering block using the dilute alkali solution, sodium aluminate into solution and red mud separation. Then alumina factory on desilication solution for operation, after bubbled into carbon dioxide with aluminum hydroxide and mother liquor. Aluminum hydroxide after roasting alumina can be obtained.

under normal circumstances, the manufacturer will use a bayer process and sintering process of alumina combined alkali production process, in this way, can take advantage of the two are complementary, create more economic benefits.