Achievements of K-rich hydrothermal rocks porous mineral calcium potassium fertilizer production process and the agricultural experiment effect was identified on March 2, 2011.

HAN Cheng and other researchers, the staffs of solid mineral resources research center, IGGCAS, research the project during 16 years. They invent the static hydrothermal process in the wet state of potassium-rich rocks with porous mineral calcium potassium fertilizer production using lime as activator.

The invention has been successful in the traditional hydrothermal water / solid ratio decreased from 15 to 25 To 1 to 1.5, achieved without stirring and rotating the static process, significantly reducing power consumption and cost, simplify the process, and there is no waste emissions, promoting the industry with both technical and economic feasibility.

Soluble potassium salt is the scarcity of resources in China, but there are very rich resources of insoluble potassium. Insoluble potassium Industrialization use has become the pursuit of several generations of scientists. Several methods have been explored such as calcination, bacterial decomposition, acid decomposition, hydrothermal technology. However, the bacteria solution is inefficient, acid decomposition method is serious pollution, the traditional hydrothermal method is too costly and difficult industrialization, calcination is low cost, but the calcined product could easily lead to soil compaction after applying.