The need for potash and phosphate is growing in step with a swelling global population putting the mineral fertilizer industry under pressure to ensure that nutrient supply keeps up with consumption. Deflourination of phosphate (DFP), 3CaF2 + 2H3PO4 = Ca3(PO4)2 + 6HF, is one process that is carried out in rotary kilns of various dimensions. Deflourination takes place at 1400°C (2550°F) capacities of 45 ft3/TPD at 15 TPH are common.
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