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文章以钾长石与中低品位磷矿石资源的合理利用为目的,借鉴窑法磷酸生产原理,以焦炭、磷矿粉和钾长石为主要原料,在高温下焙烧,以磷的反应率和钾的溶出率为主要指标,考察了还原剂焦炭用量、焙烧温度、焙烧时间、钙硅比、助剂种类及助剂添加量对反应的影响。实现了焦炭-磷矿石-钾长石体系同步提取磷和钾。
Taking the rational utilization of potassium feldspar and medium and low grade phosphate rock resources as reference, taking the production principle of kiln phosphoric acid as reference, the coke, phosphate rock and potassium feldspar were used as main raw materials and calcined at high temperature. The reaction rate of phosphorus And the dissolution rate of potassium as the main indexes. The influence of the amount of coke, the calcination temperature, the calcination time, the ratio of calcium and silicon, the types of auxiliaries and the amount of auxiliaries on the reaction were investigated. The simultaneous extraction of phosphorus and potassium from the coke-phosphate rock-potassium feldspar system was achieved.