IMPROVEMENT OF THE PROCESS OF ALUMINA PRODUCTION AT NIKOLAEV ALUMINA PLANT

摘要

Emergence of Nikolaev Alumina Plant on the map illustrating the aluminium production industry was the result of the improvement of the distortion having taken place in this industry before a considerable gap between production of alumina and primary aluminium, caused by putting into operation of cheap power supply sources of big capacity and at the same time raw material (alumina) production base for primary aluminium being practically stagnated.Alumina production lagging behind the far advanced primary aluminium producers could be explained by the lack of deposits of the bauxite suitable for processing.Refineries using non-traditional raw materials such as nepheline, alunite for alumina production, which had been gradually put into operation, appeared to be high power consuming, complicated and costly.Nikolaev Alumina Plant was put into operation in 1980 and very soon reached its design output. At the present moment, Nikolaev Alumina Plant is steady operating due to thoroughly thought-out technology where import bauxite is processed by import equipment of enough high standard. But as the science is progressing and the raw material (bauxite) base does not stick to the consistancy, as well as new requirements to the alumina properties are arising, all these resulted in a development of the Programme for improvement of the process and up-dating of the equipment. Implementation of this Programme will ensure solution of the above mentioned matters.