云南磷矿夹石层资源化方向、方法及其意义

The Orientation Method and Significance of ResourceRecovery on Phosphate Deposit Bands in Yunnan

云南磷矿夹石层是磷化工开发中的废弃物，含Ｋ２Ｏ４％～１２％，属含钾较高的矿岩，可以通过物理、化学或生物的方法研制成农业生产急需的钾质复合肥．但化学法和生物法因成本高、周期长和难度大、经济上不可行．唯有用物理法才能克服上述缺点，生产出无污染的钾质复合肥，经济上也是可行的．

The bands of phosphate deposit which are the waste in the course of the exploitation of phosphate chemical industry are k-bearing minerals and rocks,containing K2O from 4% to 12% .By means of physics,chenistry or biology,they can be used to produce K-bearing compound fertilizer of urgent need in agriculture,However,the chemical and biological productions are not practicable because the cost is high,the cycle is long and the difficulty is great.The physical one can overcome these shortcomings and produce a kind of ecological K-bearing compound fertilizer.