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Method for producing compound fertilizer by wet decomposing potassium feldspar

A technology of potassium feldspar and compound fertilizer, which is applied in the field of wet decomposition of potassium feldspar to produce compound fertilizer, which can solve the problems of high raw material cost and low content of potassium element, and achieve low environmental hazards, low power and energy consumption, and low raw material consumption. The effect of high recycling rate

Active Publication Date: 2009-10-21
青海禾坤农业科技有限公司
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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 provide a method for producing compound fertilizer by wet decomposition of potassium feldspar, so as to overcome the deficiencies of the prior art

Method used

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Embodiment Construction

[0018] The method for producing compound fertilizer by wet decomposition of potassium feldspar of the present invention, its processing step is as follows:

[0019] 1) Ingredients: Potassium feldspar powder, fluosilicic acid with a concentration of 30%, and industrial concentrated sulfuric acid with a concentration of 98%, according to the mass ratio of 1:4.5:0.5;

[0020] 2), the preparation of potassium feldspar powder: the potassium feldspar is crushed into stones with a particle size of <2cm with a jaw crusher, and then ground with a 150-mesh high-pressure suspension roller mill and iron-removed by a strong magnetic field to obtain potassium feldspar powder;

[0021] 3) Feeding reaction: put fluosilicic acid, potassium feldspar powder, and concentrated sulfuric acid into the reaction kettle in sequence according to the batching ratio, stir, and react at a constant temperature of 100°C for 3 hours to obtain a solid-liquid mixture. The tetrafluoride produced during the reacti...

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Abstract

The invention discloses a method for producing compound fertilizer by wet decomposing potassium feldspar, comprising the steps of: decomposing potassium feldspar under normal temperature atmosphere condition, separating the materials under certain technical conditions to obtain products like ammonium-potassium sulfate mother liquid, white carbon black, aluminum hydroxide and sodium silicate, taking the ammonium-potassium sulfate mother liquid as a raw material, replenishing fertilizer raw materials and auxiliary raw materials enriched with phosphorus to produce the chemical fertilizers containing standard nutrient contents of nitrogen, phosphorus, potassium and silicon such that the insoluble potassium contained in the potassium feldspar is converted into soluble potassium, and by-producing white carbon black and aluminum hydroxide, etc, thereby comprehensively utilizing potassium feldspar resources, solving the problem that the potash fertilizer in China depends on import, and satisfying the need of agricultural production. The invention has low demand on the apparatus, has simple process, convenient production operation and is easy to realize the large scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of compound fertilizer production, and relates to a method for producing compound fertilizer by wet decomposition of potassium feldspar. Background technique [0002] At present, the fertilizers used in farmland are mainly nitrogen, phosphorus, and potassium inorganic compound fertilizers. 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. , Soil fertility has excess nitrogen and phosphorus elements and insufficient potassium elements. The inorganic compound fertilizer in the prior art is mainly composed of nitrogen, phosphorus and potassium fertilizers directly, and has the technical problems of high raw material cost and low content of potassium element. Contents of the invention [0003] The purpose of the present invention is to solve the technical problems of high raw mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G1/00C05D1/04C01B33/12C01B33/32
Inventor 陈锋王严民杨威王金燕
Owner 青海禾坤农业科技有限公司
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