窑法磷酸工艺中球团内碳还原剂烧损的抑制

PREVENTION OF BURNING LOSS OF CARBON REDUCTANT IN PELLETS DURING ROTARY KILN PREPARATION OF PHOSPHORIC ACID

针对窑法磷酸工艺中球团内碳还原剂烧损，致使Ｐ２Ｏ５收率降低问题进行了研究，分析了球团内碳还原剂的烧损过程。试验结果表明，采用球团外包保护层，可防止球团内碳还原剂烧损，提高Ｐ２Ｏ５的收率，球团中磷的还原率达到８１７％。

Burning loss of carbon reductant in pellets during rotary kiln preparation of phosphoric acid resulted to a reduction in P 2O 5 recovery. This paper analysed the process of burning loss and studied the method capable of increasing P 2O 5 recovery by coating pellets to avoid the burning loss of carbon in pellets.