Title: Prodn. sandy aluminium hydroxide
Application Number: 85105213 Application Date: 1985.07.06
Publication Number: 1022151 Publication Date: 1988.11.16
Approval Pub. Date: Granted Pub. Date: 1992.06.24
International Classifi-cation: C01F7/14
Applicant(s) Name: Guizhou Aluminium Plant Address:
Inventor(s) Name: Shi Chongguang, Zhang Qiaoqing
Attorney & Agent:
Abstract:
     The present invention solves two problems, i.e., the decomposing rate for producing sand-like aluminium from the seedling separation in combined or sintering method is low, and carbonization decomposition can not produce the sand-like aluminium hydroxide yet. The process adopts a technology consisting of prior seedling separation, seedling carbonization decomposition and after seedling separation, i.e., the powder aluminium hydroxide produced from the prior seedling separation is used as seed crystal of carbonization decomposition, and the product from the latter step is used as seed crystal for the after seedling separation and finally the sand-like aluminium hydroxide from the prior and after seedling separation is sintered into a single grade of sand-like aluminium hydroxide. The decomposition rates of both seedling separations reach 50%. The process is applied to the plant for producing the sand-like aluminium hydroxide by treating ores of the empholite monohydrate type.
Time: 5