Process for producing potassium sulfate and ammonia sulfate by wet decomposing potassium feldspar

Abstract

The invention discloses a process for producing potassium sulfate and ammonia sulfate by wet decomposing potassium feldspar, comprising the steps of: decomposing potassium feldspar under low-temperature normal atmosphere condition, separating the materials under certain technical conditions to obtain products like ammonia sulfate, potassium sulfate, white carbon black, aluminum hydroxide and sodium silicate, etc., thereby comprehensively developing and utilizing potassium feldspar resources, solving the problem that the potash fertilizer in China depends on import, and satisfying the need of agricultural production.

Description

technical field [0001] The invention belongs to the technical field of potassium sulfate and ammonium sulfate production, and relates to a process for producing potassium sulfate and ammonium sulfate by wet decomposition of potassium feldspar. Background technique [0002] The fertilizers used in farmland are mainly inorganic compound fertilizers of nitrogen, phosphorus and potassium. However, in the 1970s, my country’s cultivated land was generally deficient in nitrogen, in the 1980s, phosphorus was generally deficient, and in the 1990s, potassium was deficient. After 2000, the soil Fertility has excess nitrogen and phosphorus elements and insufficient potassium elements. The production process of potassium sulfate and ammonium sulfate in the prior art has the technical problems of high requirements on process conditions, high cost of raw materials, and low content of potassium in its products. At present, my country's potash fertilizer mainly depends on imports. Contents...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the technical problems of high raw material cost and low potassium element content in the prior art, and pr