Phosphate Rock Treatment with Hydrochloric Acid for Increasing P2O5 Content

Abstract

The present paper deals with the treatment of phosphate obtained from a commercial sample of Akashat phosphate ore in hydrochloric acid. The factors studied are effects of the temperature of dissolution, acid concentration, and the time required for mixing phases. The experiments were performed with 100 kg/m 3 of solid/liquid ratio, the size of the particles ranged 125-140 µm, the initial acid concentrations were 20, 30 and 40 wt% HCl, and the temperature of dissolution was kept constant at 30, 40, 50, 60 and 70 o C. The results indicated that the percentage of P 2 O 5 increases as the HCl concentration increased using different time and temperatures. Also, the results showed that the best conditions for P 2 O 5 recovery process according were acid concentration 40%, reaction time of 90 min, and temperature 30 o C. Keywords: phosphate rock, dissolution, hydrochloric acid, P 2 O 5. ‫ﻤﺤﺘﻭﻯ‬ ‫ﺯﻴﺎﺩﺓ‬ ‫ﻟﻐﺭﺽ‬ ‫ﺍﻟﻬﻴﺩﺭﻭﻜﻠﻭﺭﻴﻙ‬ ‫ﺒﺤﺎﻤﺽ‬ ‫ﺍﻟﻔﻭﺴﻔﺎﺘﻴﺔ‬ ‫ﺍﻟﺼﺨﻭﺭ‬ ‫ﻤﻌﺎﻟﺠﺔ‬ ‫ﺍﻟﻔﺴﻔﻭﺭ‬ ‫ﺍﻭﻜﺴﻴﺩ‬ ‫ﺨﺎﻤﺱ‬ ‫ﺍﻟﺨﻼﺼﺔ‬ ‫ﺍﻟﻌﺭﺍﻗﻴـﺔ‬ ‫ﻋﻜﺎﺸـﺎﺕ‬ ‫ﻤﻨﻁﻘـﺔ‬ ‫ﻤﻥ‬ ‫ﺍﻟﻤﺴﺘﺨﺭﺝ‬ ‫ﺍﻟﻔﻭﺴﻔﺎﺘﻲ‬ ‫ﺍﻟﺤﺠﺭ‬ ‫ﻤﻌﺎﻟﺠﺔ‬ ‫ﻋﻤﻠﻴﺔ‬ ‫ﺍﻟﺤﺎﻟﻲ‬ ‫ﺍﻟﺒﺤﺙ‬ ‫ﻴﺘﻨﺎﻭل‬ ‫ﺍﻟﻬﻴﺩﺭﻭﻜﻠﻭﺭﻴﻙ‬ ‫ﺒﺤﺎﻤﺽ‬. ‫ﺍﻟﺤﺭﺍﺭﺓ‬ ‫ﺩﺭﺠﺔ‬ ‫ﺘﺎﺜﻴﺭ‬ ‫ﻫﻲ‬ ‫ﺩﺭﺍﺴﺘﻬﺎ‬ ‫ﺘﻡ‬ ‫ﺍﻟﺘﻲ‬ ‫ﺍﻟﻌﻭﺍﻤل‬ , ‫ﺍﻟﺤﺎﻤ‬ ‫ﺘﺭﻜﻴﺯ‬ ‫ﺽ‬ , ‫ﺍﻟﻭﻗـﺕ‬ ‫ﻟﻠﺨﻠﻁ‬ ‫ﺍﻟﻼﺯﻡ‬. ‫ﺒﺎﺴﺘﺨﺩﺍﻡ‬ ‫ﺍﻟﺘﺠﺎﺭﺏ‬ ‫ﺠﺭﺕ‬ ‫ﻟﻘﺩ‬ ‫ﺍﻟﺘﺎﻟﻴﺔ‬ ‫ﺍﻟﻅﺭﻭﻑ‬ : 100 ‫ﻤﺘـﺭ‬ ‫ﻟﻜـل‬ ‫ﺍﻟﺼـﻠﺒﺔ‬ ‫ﺍﻟﻤﺎﺩﺓ‬ ‫ﻤﻥ‬ ‫ﻜﻐﻡ‬ ‫ﺍﻟﺼﻠﺒﺔ‬ ‫ﺍﻟﺩﻗﺎﺌﻕ‬ ‫ﻟﺤﺠﻡ‬ ‫ﺍﻟﻌﺎﻡ‬ ‫ﺍﻟﻤﻌﺩل‬ ‫ﺍﻟﺴﺎﺌﻠﺔ؛‬ ‫ﺍﻟﻤﺎﺩﺓ‬ ‫ﻤﻥ‬ ‫ﻤﻜﻌﺏ‬ 125-140 ‫ﺤـﺎﻤﺽ‬ ‫ﺘﺭﻜﻴﺯ‬ ‫ﻤﺎﻴﻜﺭﻭﻤﺘﺭ؛‬ ‫ﻭﺯﻨﻴﺔ‬ ‫ﻜﻨﺴﺒﺔ‬ ‫ﺍﻟﻬﻴﺩﺭﻭﻜﻠﻭﺭﻴﻙ‬ 30,20 ‫ﻭ‬ 40 % ‫ﻋﻨـﺩ‬ ‫ﺍﻟﺘﻔﺎﻋل‬ ‫ﺍﻟﺤﺭﺍﺭﺓ‬ ‫ﺩﺭﺠﺔ‬ ‫ﻭ‬ ‫؛‬ 70,60,50,40,30 ‫ﻤﺌﻭﻴﺔ‬ ‫ﺩﺭﺠﺔ‬. ‫ﺘﺭﻜﻴـﺯ‬ ‫ﻋﻨـﺩ‬ ‫ﻜﺎﻨﺕ‬ ‫ﺍﻟﻔﺴﻔﻭﺭ‬ ‫ﺍﻭﻜﺴﻴﺩ‬ ‫ﻟﺨﺎﻤﺱ‬ ‫ﺍﺴﺘﺭﺠﺎﻉ‬ ‫ﻨﺴﺒﺔ‬ ‫ﺍﻓﻀل‬ ‫ﺒﺎﻥ‬ ‫ﺍﻟﻨﺘﺎﺌﺞ‬ ‫ﺍﺜﺒﺘﺕ‬ ‫ﻟﻘﺩ‬ ‫ﺍﻟﻬﻴﺩﺭﻭﻜﻠﻭﺭﻴﻙ‬ ‫ﺤﺎﻤﺽ‬ 40 % , ‫ﺘﻔﺎﻋل‬ ‫ﺯﻤﻥ‬ 90 ‫ﺤﺭﺍﺭﺓ‬ ‫ﻭﺩﺭﺠﺔ‬ ‫ﺩﻗﻴﻘﺔ‬ 30 ‫ﻤﺌﻭﻴﺔ‬ ‫ﺩﺭﺠﺔ‬. ‫اﻟﺪاﻟﺔ‬ ‫اﻟﻜﻠﻤﺎت‬ : ‫اﻟﻔﻮﺳﻔﺎﺗﯿﺔ‬ ‫اﻟﺼﺨﻮر‬ , ‫اﻟﻔﻮﺳﻔﺎﺗﻲ‬ ‫اﻟﺴﻤﺎد‬ , ‫اﻟﮭﯿﺪروﻛﻠﻮرﯾﻚ‬ ‫ﺣﺎﻣﺾ‬ , ‫اﻟ‬ ‫اوﻛﺴﯿﺪ‬ ‫ﺧﺎﻣﺲ‬ ‫ﻔﺴﻔﻮر‬ PDF created with pdfFactory Pro trial version www.pdffactory.com