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

A technology of potassium feldspar and compound fertilizer, applied in the directions of alkali metal chloride, application, fertilization device, etc., can solve the problems of low production efficiency, high labor intensity, low potassium content, etc., and achieves reduction of firing cost and manufacturing. Cost and sintering temperature reduction effect

Active Publication Date: 2013-07-03
江苏纳鼎材料科技有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Recently, the Institute of Chemistry, Chinese Academy of Sciences, Nanjing Agricultural University, and Jiangsu Academy of Agricultural Sciences launched "Production and Application of New Multi-Multiple Mineral Fertilizer Silicon Calcium Potassium Fertilizer". The firing temperature reaches 1350°C, and due to the low potassium content, its value is not high, and its transportation cost limits its large-scale production and long-distance sales

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: The method of using potash feldspar to produce potassium oxide and concurrently producing calcium, magnesium, phosphorus, and silicon compound fertilizer includes the following steps:

[0025] 1. Material preparation: prepare the following raw materials according to weight percentage:

[0026] Potash feldspar 43, phosphate rock 33, dolomite 14, industrial salt 10, total 100;

[0027] 2. Crushing and mixing into raw meal: firstly crush potash feldspar, phosphate rock, and dolomite to remove iron, then mix and grind together to 180-200 mesh to make raw meal;

[0028] 3. Homogenization: Pass the raw meal prepared in step 2 through a 180-mesh sieve to remove iron and then send it to the homogenization warehouse, and determine that the calcium carbonate titration value is less than 0.2% when it is qualified;

[0029] 4. Firing: After homogenization, the raw meal with uniform and stable composition is calcined in the kiln. If you choose a mechanical shaft kiln, the firing te...

Embodiment 2

[0033] 1. Material preparation: prepare the following raw materials by weight percentage

[0034] Potash feldspar 40, phosphate rock 36, dolomite 15, industrial salt 9, total 100;

[0035] 2. Crushing and mixing into raw meal: firstly crush potash feldspar, phosphate rock, and dolomite to remove iron, then mix and grind together to 180-220 mesh to make raw meal;

[0036] 3. Homogenization: pass the raw meal prepared in step 2 to a 180-mesh sieve to remove iron and then send it to the homogenization warehouse, and determine that the deviation of the calcium carbonate titration value is less than 0.2%, and it is qualified;

[0037] 4. Firing: After homogenization is qualified, the raw material with uniform and stable composition is put into the kiln for calcination. If the mechanical shaft kiln is selected, the firing temperature is 850℃~950℃. If the rotary kiln is selected, the firing temperature is 850℃~900℃. ;

[0038] 5. Make potassium chloride and calcium, magnesium, phosphorus, sil...

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PUM

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Abstract

The invention relates to a method for producing potassium chloride 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 chloride and calcium, magnesium, phosphorus and silicon composite fertilizer, wherein the raw materials comprise the components in percentage by weight as follows: 40-46% of potassium feldspar, 30-38% of phosphate ore, 12-16% of dolomite and 9-11% of industrial salt; calcining at 850-950 DEG C, and if a rotary kiln is selected, calcining at 850-900 DEG C; water-quenching red hot clinkers obtained, separating liquid from dregs and concentrating the liquid to obtain potassium chloride; drying, dehydrating and crushing residual solid dregs to 150-200 meshes, and packaging to obtain the calcium, magnesium, phosphorus and silicon composite fertilizer. Compared with the prior art, not only is the sintering temperature reduced by 40 DEG G, but also the calcining cost is reduced by 50% and the yield is improved by 5-6 times.

Description

Technical field [0001] The invention relates to the field of chemical fertilizers, in particular to a method for using potash feldspar to produce potassium chloride fertilizer and co-produce calcium-magnesium-phosphorus-silicon composite fertilizer. Background technique [0002] The use of potash feldspar, sericite, leucite, alunite and other potash-containing ores to produce potash has a history of one hundred years. During the First World War, due to the tight supply of potash fertilizer, potash feldspar and limestone were roasted and leached in the United States, Russia, and Japan. In the middle of the last century, the former Soviet Union, Brazil, South Africa and India successively made potash from insoluble potassium minerals, but these factories stopped production with the development and dumping of cheap soluble potash mines and the cessation of World War II. . my country started the research on this project in the early days of the founding of the People’s Republic of C...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D3/08C05G1/00
Inventor 雷志刚姚贤炜
Owner 江苏纳鼎材料科技有限公司
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