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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: 2005-10-12
河南省东辰钾肥工程技术研究中心
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  • 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

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Effect test

Embodiment 1

[0013] Embodiment 1, get potassium feldspar, limestone, dolomite purification treatment of potassium oxide mass percentage 15% and be crushed to particle diameter 10-20mm (millimeter) respectively, white coal is crushed to particle diameter 1-2mm, press 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 conversion agent (calcium chloride+sodium hydroxide) (calcium chloride: sodium hydroxide=1: 0.2) ingredients Mix evenly, grind into a ball mill to a particle size of 0.074mm, and then make balls with a diameter of about 10-15mm. Calcined in cement shaft kiln, sintered at 1000-1300°C for about 35 minutes, cooled and discharged out of the kiln. Then it is ground to a fineness of more than 90% and passed through a 120-mesh sieve to obtain a powdery product. After granulation, it is a granular product.

Embodiment 2

[0014] Embodiment 2, get the potassium ore (potassium feldspar and illite), limestone, dolomite purification treatment of 13% potassium oxide mass percentage and crush respectively to particle diameter 10-15mm (millimeter), and anthracite is crushed to particle diameter 1-1.5mm , according to 1 part of potassium ore (potassium feldspar: illite=1:0.45, parts by mass, the same below), 0.77 part of limestone, 0.43 part of dolomite, 0.21 part of anthracite, conversion agent (calcium chloride+ammonium sulfate+hydroxide Calcium) 0.09 part (calcium chloride: ammonium sulfate: calcium hydroxide=1: 0.6: 0.2) ingredients are mixed evenly, put into a ball mill and grind to a particle size of 0.074mm, and make balls, the ball diameter is about 8-12mm. Put it into cement rotary kiln for calcination, and sinter at 1000-1250°C for 30-35 minutes, and the balls will become gray-black lumps with a diameter of 30-50mm. After being cooled and discharged from the kiln, it is ground to a fineness o...

Embodiment 3

[0015] Embodiment 3, get the potash ore (potassium feldspar+illite+glaconite), limestone, dolomite purification treatment of potassium oxide mass percentage 12% and be crushed to particle diameter 5-15mm (millimeter) respectively, and white coal is broken to Particle size 1-2mm, according to 1 part of potassium ore (potassium feldspar: illite: glauconite = 1:0.40:0.15, parts by mass, the same below), 0.71 part of limestone, 0.48 part of dolomite, 0.23 part of white coal powder , conversion agent (magnesium chloride+calcium sulfate+calcium hydroxide) 0.1 part (magnesium chloride: calcium sulfate: calcium hydroxide=0.8: 1: 0.2) batching mixes evenly, enters ball mill and grinds to particle diameter 0.074mm, then ball making, ball diameter About 5-10mm. Put it into the cement vertical kiln for calcination, and sinter at 1000-1230°C for about 30 minutes, so that the balls are fired into gray-black cooked blocks with a diameter of 30-50mm. After cooling out of the kiln, grind to a...

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Abstract

Production of potassic-magnesian fertilizer is carried out by: 1) using carbonate minerals of potassium mineral, calcium, magnesium or calcium-magnesium with mass percent of burnt potash >=11% in mass ratio: 1:0.70-0.90:0.40-0.48, breaking, and mixing with powdered coal and converting agent; 2) powder milling, ball forming, putting into cement kiln at 1000-1300deg.C, sintering for 25-45 mins, and cooling; 3) powder milling, choosing two or three kinds of converting agent from (a) halide of Al3+, Mg2+, Ca2+, Na+ or NH4+, (b) sulfate and / or carbonate and (c) hydroxide, the ratio of a, b, c mass:0.8-1:0.6-1:0-0.2, converting agent mass is 2-8 wt% of furnace charge, and powdered coal mass is 8-13wt% of furnace charge. It achieves low cost and good performance.

Description

technical field [0001] The invention belongs to the technical field of producing potassium-containing fertilizers by utilizing potassium- and magnesium-containing ores, and in particular relates to a method for producing citrate-soluble potassium-magnesium fertilizers by utilizing potassium-containing ores. Background technique [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. Therefore, it is urgent to seek the production method of potassium magnesium fertilizer with low production cost and good fertilizer efficiency. In view of the principle that the sintering method used in cement production and powder metallurgy production makes the material undergo phase change and the principle of material transformation in the process of using insoluble potassium ore to produce potassium and magnesium fertilizers is very similar. Using the cement pro...

Claims

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Application Information

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IPC IPC(8): C05D1/04C05D3/02C05D5/00C05D11/00
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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