Abstract

The comparative economical analysis and energetic analysis of alumina production from various kinds of raw materials were carried out basing on industrial data. The main process parameters of nepheline raw materials processing through sintering adopted at large industrial scale are given. The said technology allows the wasteless utilization of nepheline to produce alumina, soda, potash, potassium sulphate and chloride, portland cement and gallium without polluting the environment. According to industrial data the production cost of alumina while using the sintering of nepheline raw material is considerably lower than in processing of high grade bauxites by the Bayer way due to complete utilization of wastes, and as for capital investments into the process facilities they are lower than those into alumina production from bauxites, production of soda, potash and cement by traditional methods taken together. Are cited the flowsheets of alumina, soda, potash and portland cement production from nepheline ore, the process interrelationships determining the efficiency of raw material processing, and ways of further improvement of the process.

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