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4.2.3.5Alumina production (AP).

Alumina production (hereinafter - PG) has a large volume of waste "of red mud" with pH = 9,8, which contains approximately macronutrients (%): Fe - 53, Al – 11.6, Si – 4.5, Ti – 5.0, Ca – 8.9, Na – 2.2, Mg – 0.8, K - 0.3, Zr - 0.08, P - 0.5, V - 0.19, Cr – 0.6, Mn – 0.29; and microelements (g / t): Cu - 5, Be - 10, B - 50, S - 4, Co - 0.2, Ga - Sc 30 - 30, La – 20, Ce - 30, Mo – 20, Y - 80, Ni - 20. This waste is not only a huge threat to the environment, but also contains a large economic potential when used as a part of certain of salts, as commercial products. Return of of the desired product - alumina in process, effective cleaning of of technological process equipment will give an opportunity to significantly (by more than 10%) to increase economic efficiency of production and improve the ecological situation of the environment.

4.2.3.5.1. The general concept of AP. Environmental impact on environment and energy costs. Competitive environment. Market and its prospects.

4.2.3.5.2. Ecological and technological assessment of the direction of of modernization of AP.

4.2.3.5.3. Development of baseline data for the design, development of the reactor equipment technological conversion (the process):

4.2.3.5.3.1.

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4.2.3.5.3.6.

4.2.3.5.4. Collection and elaboration baseline data for the design of complex new technologies for the production of alumina using ammonium chloride as a whole.

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