Production of potassium and magnesium fertilizer

A production method and technology of potassium and magnesium fertilizers, applied in the direction of magnesium fertilizers, potash fertilizers, inorganic fertilizers, etc., can solve the problems of losing market competitive advantages and high costs of potassium and magnesium fertilizers, and achieve the goals of enhanced resistance to diseases and insect pests, improved rice grades, and foreign exchange savings Effect

Inactive Publication Date: 2006-06-14
河南省东辰钾肥工程技术研究中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The cost of producing potassium and magnesium fertilizers by blast furnace fusion thermochemical method is relatively high, and gradually loses its market competitive advantage

Method used

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  • Production of potassium and magnesium fertilizer

Examples

Experimental program
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Effect test

Embodiment 1

[0013] Example 1. Potassium feldspar, limestone, and dolomite with 15% potassium oxide mass percentage were purified and crushed to a particle size of 10-20mm (mm) respectively, and white coal was crushed to a particle size of 1-2mm, and 1 part of potassium ore (Parts by mass, the same below), 0.84 parts of limestone, 0.40 parts of dolomite, 0.22 parts of white coal powder, 0.085 parts of transforming agent (calcium chloride + sodium hydroxide) (calcium chloride: sodium hydroxide = 1: 0.2) Mix evenly, grind into a ball mill to a particle size of 0.074mm, and then make a ball with a ball diameter of about 10-15mm. It is calcined in a cement shaft kiln, sintered at 1000-1300°C for about 35 minutes, and discharged out of the kiln after cooling. After grinding to a fineness of 90% or more, pass through a 120-mesh sieve, which is a powdery product. After granulation, it becomes a granular product.

Embodiment 2

[0014] Example 2. Potassium ore (potassium feldspar and illite), limestone and dolomite with a mass percentage of potassium oxide of 13% were crushed to a particle size of 10-15mm (mm), and anthracite coal to a particle size of 1-1.5mm. ,According to 1 part of potassium ore (potassium feldspar: illite = 1:0.45, parts by mass, the same below), 0.77 parts of limestone, 0.43 parts of dolomite, 0.21 parts of anthracite, conversion agent (calcium chloride + ammonium sulfate + hydroxide Calcium) 0.09 parts (calcium chloride: ammonium sulfate: calcium hydroxide = 1: 0.6: 0.2), mix the ingredients evenly, and grind them into a ball mill to a particle size of 0.074 mm, and make a ball with a ball diameter of about 8-12 mm. It is calcined in a cement rotary kiln and sintered at 1000-1250°C for 30-35 minutes. The pellets become gray-black lumps with a block diameter of 30-50mm. After cooling and unloading from the kiln, it is pulverized to a fineness of 90% or more and passed through a 120-m...

Embodiment 3

[0015] Example 3. Potassium ore (potassium feldspar + illite + sea green stone), limestone and dolomite with a mass percentage of potassium oxide of 12% were crushed to a particle size of 5-15 mm (mm), and white coal was crushed to The particle size is 1-2mm, based on 1 part of potassium ore (potash feldspar: illite: sea green stone = 1:0.40:0.15, parts by mass, the same below), 0.71 parts of limestone, 0.48 parts of dolomite, 0.23 parts of white coal powder , Transforming agent (magnesium chloride+calcium sulfate+calcium hydroxide) 0.1 part (magnesium chloride: calcium sulfate: calcium hydroxide = 0.8:1:0.2), mix the ingredients evenly, and grind them into a ball mill to a particle size of 0.074mm, and then make a ball. About 5-10mm. It is calcined in a cement vertical kiln, and sintered at 1000-1230°C for about 30 minutes, so that the pellets are fired into gray-black mature blocks with a block diameter of 30-50mm. After cooling out of the kiln, it is ground to a fineness of mor...

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Abstract

The invention discloses a method for producing potassium-magnesium fertilizer, which belongs to the technical field of producing potassium-containing fertilizer by using ore containing potassium and magnesium. The method comprises the following steps: (1) according to the mass ratio of 1:0.70-0.90:0.40-0.48, potassium ore, calcium carbonate minerals, magnesium or calcium-magnesium carbonate minerals with a mass percentage of potassium oxide ≥ 11% are taken, and after crushing Mix with coal powder and conversion agent, (2) Grind and pelletize, put into cement kiln and sinter at 1000-1300°C for 25-45 minutes, cool, (3) Grind; conversion agent is from Al 3+ , Mg 2+ , Ca 2+ 、Na + or NH 4 + (a) halides, (b) sulfates or / and carbonates, (c) hydroxides, optionally two or three, the mass ratio of a, b, c is 0.8-1: 0.6- 1:0-0.2, the mass dosage of the conversion agent is 2-8% of the total amount of charge; the mass amount of pulverized coal is 8-13% of the total charge. Utilizing the method of the invention to produce the citrate-soluble potassium-magnesium fertilizer has low production cost and good product performance.

Description

Technical field [0001] The invention belongs to the technical field of production of potassium-containing fertilizers by using potassium and magnesium-containing ores, and particularly relates to a method for producing citrate-soluble potassium-magnesium fertilizers by using potassium-containing ores. Background technique [0002] The use of blast furnace melting thermochemical method to produce potassium and magnesium fertilizers is costly and gradually loses market competitive advantage. Therefore, it has become an urgent task to seek a production method of potassium-magnesium fertilizer with low production cost and good fertilizer efficiency. In view of the fact that the sintering method used in cement production and powder metallurgy production is very similar to the principle of material transformation in the process of using insoluble potash ore to produce potash and magnesium fertilizer, the principle of material transformation in the process of using insoluble potash ore ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05D11/00C05D1/04C05D3/02C05D5/00
Inventor 陈廷臻张军营毛俊卿
Owner 河南省东辰钾肥工程技术研究中心
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