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Method for producing potassium sulphate and co-producing calcium, magnesium, phosphorus and silicon composite fertilizer by potassium feldspar

A technology of potassium feldspar and potassium sulfate, which is applied in sulfate/bisulfate preparation, application, and fertilization devices, etc., can solve the problems of high labor intensity, high firing temperature, low production efficiency, etc. The effect of lowering the temperature and reducing the firing cost

Inactive Publication Date: 2015-07-08
兴安盟隆华农业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the last ten years, due to the high price of potassium fertilizers, the research on making potassium fertilizers from potassium feldspar has become more active. For example, Xue Yanhui of Shandong University of Science and Technology proposed a method of using a catalyst to decompose potassium feldspar at low temperature to produce potassium sulfate, and at the same time by-product white carbon black and hydrogen oxidation. Aluminum; Changsha Design and Research Institute of Chemical Industry proposed "wet decomposition method of potassium feldspar ore" ZL96118069.2; "flotation separation technology of wet decomposition material of potassium feldspar ore" 97108312.6. Pollution to the environment and high energy consumption, complex process, long product chain, and the safety production of high-risk items such as concentrated sulfuric acid is worrying
The Institute of Chemistry, Chinese Academy of Sciences, Nanjing Agricultural University, and Jiangsu Academy of Agricultural Sciences launched the "Production and Application of New Multi-Multiple Mineral Fertilizer Silicon Calcium Potassium Fertilizer". The formation temperature is as high as 1350°C, which limits its large-scale application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment one: utilize potassium feldspar to produce potassium sulfate and co-produce calcium, magnesium, phosphorus, the method for silicon compound fertilizer comprises the steps:

[0026] 1. Raw material preparation: Prepare the following raw materials according to the weight ratio:

[0027] Potassium feldspar 50, gypsum 18, apatite 20, zinc slag 2, dolomite: 20, total 110;

[0028] 2. Crush and mix into raw meal: firstly crush potassium feldspar, dolomite, apatite and gypsum separately to remove iron, then mix and grind together to 180-200 mesh to form raw meal for use;

[0029] 3. Homogenization: pass the raw meal prepared from the ingredients in step 1 through a 180-mesh sieve to remove iron and then send it to the homogenization storehouse. It is qualified when the deviation of the calcium carbonate titer value is less than 0.2%.

[0030] 4. Firing: Put the raw material with uniform and stable composition after homogenization into the kiln for calcination. If y...

Embodiment 2

[0034] The method for utilizing potassium feldspar to produce potassium fertilizer and co-produce calcium, magnesium, phosphorus and silicon compound fertilizer comprises the following steps:

[0035] 1. Raw material preparation: prepare the following raw materials according to weight ratio: 55 potassium feldspar, 15 gypsum, 18 apatite, 2 zinc slag, 22 dolomite, total 112;

[0036] 2. Crush and mix into raw meal: firstly crush potassium feldspar, dolomite, apatite and gypsum separately to remove iron, then mix and grind together to 180-200 mesh to form raw meal for use;

[0037] 3. Homogenization: pass the raw meal prepared from the ingredients in step 1 through a 180-mesh sieve to remove iron and then send it to the homogenization storehouse. It is qualified when the deviation of the calcium carbonate titer value is less than 0.2%.

[0038] 4. Firing: Put the raw material with uniform and stable composition after homogenization into the kiln for calcination. If the mechanical...

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Abstract

The invention relates to a method for producing potassium sulphate and co-producing a calcium, magnesium, phosphorus and silicon composite fertilizer by potassium feldspar. The method comprises the following steps of: preparing materials, crushing and mixing the materials to form raw materials, homogenizing and calcining, and finally preparing potassium sulphate and calcium, magnesium, phosphorus and silicon composite fertilizer. According to the method provided by the invention, compared with the prior art, not only is the sintering temperature reduced by 200 DEG G, but also the calcining cost is reduced by about 40% and the yield is improved by 4-5 times. The method is suitable for middle and medium enterprises in potassium feldspar, gypsum, apatite, cadmia or dolomite mineral resource areas to produce potash fertilizers and calcium, magnesium, phosphorus and silicon composite fertilizers.

Description

technical field [0001] The invention relates to the field of chemical fertilizers, in particular to using potassium feldspar to produce potassium sulfate fertilizer to co-produce calcium, magnesium, phosphorus and silicon multi-component compound fertilizer and a manufacturing method thereof. Background technique [0002] The research of using potassium feldspar to produce potash fertilizer has a history of more than 100 years. During World War I, due to the shortage of potash fertilizer supply, potash feldspar and limestone were used to make potash fertilizer in the United States, Russia, Japan and other countries. In the middle of the 20th century, the former Soviet Union, Brazil, South Africa and India successively extracted potassium salts from insoluble potassium minerals to make potassium fertilizers, but there was no major breakthrough. There are many ways to decompose potassium feldspar, which can be divided into volatilization and roasting according to the decomposit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01D5/10C05G1/00
Inventor 雷志刚陈淑萍
Owner 兴安盟隆华农业科技有限公司
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