Studies on the dissolution of phosphate ore in mineral acids

ABSTRACT

The dissolution of Abou-Tartor phosphate ore in sulphuric acid, phosphoric-sulphuric acid mixture and hydrochloric acid was studied. The effects of time, temperature, acid/ore ratio and shaking were investigated. The results indicated that the dissolution of the ore in sulphuric acid was rather difficult; but the dissolution in H3PO4- H2SO4 mixture [76.1 54.5 g] gave good result from 100 g of the ore at an acid/ore ratio of 1.4 after 30 min, at 70 degree and a shaking rate of 100-200 rhm. The optimum condition of the dissolution in HCl/ore ratio of 27 1 was 80 min, at 25 degree and a rate of shaking of 120 rhm. The obtained results showed that the dissolution of Abou- Tartor phosphate ore in HCl is more preferable than other mineral. acids