Improvement in capacity of high rate decanter through process modifications
One of the important steps in the Bayer process is the solid-liquid separation by which the particulate materials are removed from the feed slurry. Bauxite contains various impurities which need to be separated out after digesting the bauxite along with caustic solution at high temperatures and pressures. The HRDs separate the digestion slurry into clear overflow liquor with low suspended solids and a thickened mud underflow stream. Settling of digestion mud is aided by the addition of synthetic flocculant and continuous agitation by the rake mechanism. Present paper discusses 35％ increase in capacity than design maximum by adopting simulation and operational control strategies while handling various qualities of bauxite. Modifications done in flocculant dosing system and optimization has been discussed.
settling rate flocculant control
Bimalananda Senapati C. Satish Kumar Tonmoy Banerjee
Aluminum Ltd., Lanjigarh, Kalahandi Dist., Orissa-766 027, India
国际会议
XVIII International Symposium of ICSOBA(第18届国际铝土矿、氧化铝及铝工业学术年会)
郑州
英文
289-294
2010-11-25（万方平台首次上网日期，不代表论文的发表时间）