Potassium feldspar

Potassium is an important element for crop growth. There are many potassium-containing resources in the world, but most of them are water-insoluble or insoluble. Potassium resources are abundant in China, but soluble potassium resources are very poor. Foreign soluble potassium resources are sufficient to meet the needs of agriculture, so there are few studies on making potassium fertilizer from water-insoluble potassium resources. China from the early 1960s began to use potassium feldspar potash fertilizer research, has carried out dozens of technology research, comprehensive can be divided into: sintering method, high temperature melting method, hydrothermal method, blast furnace smelting method and low temperature decomposition method.