The Practice Of The Sintering Method Replaced By Low Temperature Bayer Method For The Alumina Production Process

Aluminum and its alloys have many excellent properties. Its output second only to iron and steel and occupy the top of the non-ferrous metal production. As the boom in the aluminum industry, Alumina which is raw materials of aluminum is booming. Alumina industry competitive is very fierce.How to reduce costs is thinked by every alumina enterprise. Sintering method alumina production have a good characteristic.It is good to Treatment of low grade bauxite.But it have same bad characteristics.It have a long technological process,not energy saving,and high-cost.The cost can not create benefit,so it must be changed.The thesis study on the pros and cons in annual yield100000t of sintering method alumina production plant.And study on the feasibility for the sintering method production process transformation to become the low temperature by Bayer production processAs the same time, Study on the industrial practices and their results of the transformation. With the imports of bauxite gibbsite, the low temperature by Bayer produce the alumina in low temperature(140-145℃).The stripping system and the silicon removing system of the sintering method alumina production can meet the requirements of temperature.So,use the equipment of sintering method alumina production to produce alumina in low temperature by Bayer transformation with some reform.At the same time construct some troughes and conduits to increase the material flow and prolong the residence time of materials. After the reform,the cost is drop about400yuan.Raw material mill production optimization and use of idle equipment are in-depth studied. Modification of better achievements in energy saving and consumption reducing of raw material mill. After the reform,the cost of the pulp milling is drop about1.01degree per cubic pulp.