Enhancing the filtration rate of new valley phosphate concentrate with organic and inorganic additives: Comparative study

E. A. Abdel-Aal*, Central Metallurgical Research and Development Institute (CMRDI), Egypt

Phosphoric acid is intermediate product for fertilizers production. It is mainly produced by the wet process, in which phosphate concentrate is reacted with sulfuric and weak phosphoric acids with precipitation of calcium sulfate dihydrate (phosphogypsum). Gypsum morphology, aspect ratio as well as crystal size distribution of New Valley phosphate concentrate related to filtration rate with and without organic and inorganic additives are studied.

The inorganic additives used are Aluminum Sulfate and Clay (calcined and crude). While, the organic additives used are Cetyl pyridinium chloride (CPC) and Sulfonic acid (SA). The applied dosages are ranged from 0.25 to 2.5 Kg organic additive/ton P2O5 in phosphate concentrate and about 7.6 Kg Al2O3of inorganic additive/ton P2O5 in phosphate concentrate. The filtration rate of New Valley phosphate concentrate is 3.6 ton P2O5 /m2.day without additives. This filtration rate was increased by 33 % and 31 % with....

Session: L13 - Filtration enhancement by Coagulation/Flocculation
Day: 12 October 2016
Time: 16:45 - 18:00 h

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