Production method of potassic magnesium fertilizer

A production method and technology of potassium and magnesium fertilizers, applied in the direction of potassium fertilizers, inorganic fertilizers, fertilization devices, etc., can solve problems such as difficulty in producing citrate-soluble potassium and magnesium fertilizers, little gain in melting point mass conversion rate, limited serpentine resources, etc. , to achieve the effect of high effective potassium content and conversion rate, easy production and operation, and reduced viscosity

Inactive Publication Date: 2006-03-15
HENAN GEOLOGICAL SCI RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the flux used only has a limited solubilizing effect on the charge, and has little effect on lowering the melting point, improving the quality (grade) and conversion rate of the fertilizer.
Moreover, serpentine resources are limited and cannot be used more
If the phosphate rock is simply changed to potassium ore, it is difficult to produce citrate-soluble potassium and magnesium fertilizers by using the above method

Method used

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  • Production method of potassic magnesium fertilizer
  • Production method of potassic magnesium fertilizer
  • Production method of potassic magnesium fertilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1, get 1 part of potassium feldspar (parts by weight, the same below), 0.1 part of limestone, 0.78 part of dolomite, crush to about 50-80 mm in particle diameter, pour into the pickling tank, in the dilute hydrochloric acid aqueous solution of PH=3.5 Soak in water for 1 hour, remove and dry. Add 8% activator (which contains 10% sodium silicate, 50% calcium sulfate, and 40% sodium chloride) accounting for 8% of the total charge, and put them into the furnace for high temperature reaction for about 2 hours. Control the furnace temperature at 1350±50°C, furnace top temperature at 150-200°C, air temperature at 400°C, cold air pressure at 290-300 mm Hg, coke ratio at 0.30-0.31, and material rate at 7-8 tons / hour. The furnace material is melted and reacted at high temperature, and then quenched to 800°C at a cooling rate of 300°C / min to form a semi-finished glass body, which is then ground and pelletized into a potassium magnesium fertilizer product. In the presen...

Embodiment 2

[0018] Example 2. Take 1 part of potassium feldspar and 0.95 part of dolomite, crush them to 40-60 mm, pour them into dilute hydrochloric acid aqueous solution with pH=4.0 and soak for 1.5 hours, remove them and dry them in the air. Add 9% activator (including 5% magnesium silicate, 55% sodium carbonate, and 40% calcium chloride) accounting for 9% of the total charge, and put them into the furnace for high temperature reaction for about 2 hours. Control the furnace temperature at 1400±50°C, furnace top temperature at 150-200°C, air temperature at 390-400°C, cold air pressure at 290-300 mm Hg, coke ratio at 0.3, and material rate at 7-8 tons / hour. The furnace charge is melted and reacted at a high temperature, and then quenched at a cooling rate of 300°C / min to about 800°C to form a semi-finished glass body, which is then ground and pelletized into a potassium-magnesium fertilizer product. In the present embodiment, the structure factor of batching glass O b / y b =2.76, the r...

Embodiment 3

[0019] Example 3: Take 1 part of potassium feldspar and 1.02 parts of dolomite, crush them to 50-60 mm, pour them into dilute hydrochloric acid aqueous solution with pH=4.5 and soak them for 2 hours, remove them and dry them in the air. Add an activator (which contains 10% sodium silicate, 50% sodium carbonate, and 40% calcium chloride) accounting for 7% of the total charge, and put them into the furnace for high temperature reaction for about 2 hours. The furnace temperature is controlled at 1400±50°C, the furnace top temperature is 150-200°C, the air temperature is 400°C, the cold air pressure is 300 mm Hg, the coke ratio is 0.32, and the material rate is 7-8 tons / hour. The furnace charge is melted and reacted at a high temperature, and then quenched at a cooling rate of 300°C / min to about 850°C to form a semi-finished glass body, which is then ground and pelletized into a potassium-magnesium fertilizer product. In the present embodiment, the structure factor of batching gla...

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Abstract

A K-Mg fertilizer is prepared from the carbonate ore containing K ore and Ca and / or the carbonate ore containing Mg, proportional mixing, crushing, immersing in diluted hydrochloric acid, drying, adding activating agent, reacting at 1200-1450 deg.C for 2-4 hr by blast furnace smelting method, sudden cooling, pulverizing and granulating. Its advantages are high output rate and high fertility.

Description

technical field [0001] The invention belongs to the technical field of potassium-containing fertilizer production technology, and particularly relates to a method for producing citrate-soluble potassium-magnesium fertilizer by utilizing potassium-containing ore. Background technique [0002] When using the blast furnace melting method to produce calcium magnesium phosphate fertilizer, phosphate rock and serpentine, dolomite or limestone are mixed and melted, and the serpentine, dolomite or limestone is used as a flux. The method utilizes phosphate rock resources existing in nature to produce calcium-magnesium phosphate fertilizer, and the cost is relatively low. However, the flux used only has a limited solubilization effect on the charge, and has little effect on lowering the melting point, improving the quality (grade) and conversion rate of the fertilizer. And serpentine resource is limited, can not be used more. If simply change phosphate rock to potassium ore, it is d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05D11/00C05D1/04
Inventor 陈廷臻冯臣亭米清海
Owner HENAN GEOLOGICAL SCI RES INST
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