Effect of Pre-desilication Temperature and Time on Desilication Behavior of Indian West Coast Bauxites
Desilication of Bayer liquor is a very important process step in achieving acceptable levels of silica content in liquor to precipitation in order to minimise process scaling issues and to produce alumina of acceptable quality.Pre-desilication-holding bauxite slurry at elevated temperatures prior to digestion-is a common process step being followed by many alumina refineries.Hindalcos Belgaum alumina refinery processes bauxite of different quality available from the mines of Indian West Coast.The conditions of pre-desilication like temperature and time of holding required for optimum desilication depend very much on the quality of bauxite.This study identifies the optimum process conditions to be followed by the refinery through statistically-designed laboratory experiments for various bauxites containing low to high levels of silica.Relative effects of process variables are enumerated.Similar studies are recommended for other bauxites which would help the design engineers to design the desilication process of a new refinery and the process engineers to operate an existing refinery in an optimum manner.
Bauxite Desilication Pre-desilication Silica Ratio Supersaturation Silica attack
S.Sankaranarayanan Sagar S Pandit V.B.Usulkar R.N.Jadhav Y.P.Anandache
Hindalco Innovation Centre-Alumina, Hindalco Industries Limited, Belgaum, India
国际会议
32th International Conference & Exhibition ICSOBA-2014(第32届国际铝土矿、氧化铝和铝工业技术学术年会)
郑州
英文
235-248
2014-10-12（万方平台首次上网日期，不代表论文的发表时间）