Method for producing potassium magnesium sulfate fertilizer and manganese sulfate from manganese-containing fly ash

A technology of potassium magnesium sulfate fertilizer and manganese sulfate, which is applied in the direction of manganese sulfate, can solve the problems of environmental secondary pollution, environmental pollution, and low consumption, and achieve significant economic value and the effect of solving environmental pollution problems

Inactive Publication Date: 2017-03-22
LINGQIU XINGGUANG MINING IND DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of these manganese-containing dedusting ash are simply piled up, resulting in a great waste of resources. When the air is dry, the dust will be blown by the wind, causing serious pollution to the environment.
[0003] Although some enterprises have adopted sintering for manganese-containing dust removal ash, and then return it to the furnace for use, but this treatment method consumes too little (the addition ratio is small), and cannot make full use of the beneficial ingredients in it, and cannot properly handle the manganese-containing dust. Dust removal still causes secondary pollution to the environment

Method used

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  • Method for producing potassium magnesium sulfate fertilizer and manganese sulfate from manganese-containing fly ash
  • Method for producing potassium magnesium sulfate fertilizer and manganese sulfate from manganese-containing fly ash
  • Method for producing potassium magnesium sulfate fertilizer and manganese sulfate from manganese-containing fly ash

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method of producing potassium magnesium sulfate fertilizer and manganese sulfate with manganese-containing dust removal ash:

[0023] Select 20 tons of manganese-containing dust removal ash and 40 tons of water; the composition of manganese-containing dust removal dust is (mass percentage): manganese 15.8%, potassium oxide 18.3%, magnesium 7.3%, and the remaining components are Pb, As, Cd, Ni, Co heavy metals.

[0024] The preparation method is as follows:

[0025] (1) Ball milling: Put manganese-containing dedusting ash into a ball mill and add water to wet mill. The particle size of the material after ball milling is 98% of the total material by mass after passing through a 100-mesh sieve;

[0026] (2) Fertilizer immersion: put the ball-milled material in a leaching tank, and feed sulfur dioxide gas into the material while stirring. After 3 hours, the pH value of the material reaches 5.0, and stop supplying sulfur dioxide gas;

[0027] (3) Solid-liquid separation ...

Embodiment 2

[0036] A method of producing potassium magnesium sulfate fertilizer and manganese sulfate with manganese-containing dust removal ash:

[0037] Select 15 tons of manganese-containing dust removal ash and 32 tons of water; the composition of manganese-containing dust removal dust is (mass percentage): manganese 19.2%, potassium oxide 15.6%, magnesium 5.8%, and the remaining components are Pb, As, Cd, Ni, Co heavy metals.

[0038] The preparation method is as follows:

[0039] (1) Ball milling: Manganese-containing dedusting dust is wet-milled in a ball mill with water, and the particle size of the material after ball milling is: the material passing through a 100-mesh sieve accounts for 99% of the total;

[0040] (2) Fertilizer immersion: put the ball-milled material in a leaching tank, and feed sulfur dioxide gas into the material while stirring. After 2.5 hours, the pH value of the material reaches 5.0, and stop supplying sulfur dioxide gas;

[0041] (3) Solid-liquid separat...

Embodiment 3

[0050] A method of producing potassium magnesium sulfate fertilizer and manganese sulfate with manganese-containing dust removal ash:

[0051] Select 20 tons of manganese-containing dust removal ash and 41 tons of water; the composition of manganese-containing dust removal dust is (mass percentage): manganese 14.3%, potassium oxide 11.7%, magnesium 9.5%, and the remaining components are Pb, As, Cd, Ni, Co heavy metals.

[0052] The preparation method is as follows:

[0053] (1) Ball milling: add manganese-containing dust to the ball mill and add water to wet mill. The particle size of the material after ball milling is: the material passing through the 100-mesh sieve accounts for 98% of the total;

[0054] (2) Fertilizer immersion: put the ball-milled material in a leaching tank, and feed sulfur dioxide gas into the material while stirring. After 3.5 hours, the pH value of the material reaches 5.0, and stop supplying sulfur dioxide gas;

[0055] (3) Solid-liquid separation (...

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PUM

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Abstract

The invention discloses a method for producing potassium magnesium sulfate fertilizer and manganese sulfate from manganese-containing fly ash and belongs to the field of resource recycling and chemical industry. The method comprises ball milling, soaking in fertilizer, solid-liquid separation (1), residue washing, soaking in manganese, solid-liquid separation (2), magnesium potassium sulfate solution preparation and manganese sulfate preparation. The method realizes recovery and use of beneficial components in manganese-containing fly ash and solves the problem of environmental pollution caused by the manganese-containing fly ash stacking process. The produced potassium magnesium sulfate fertilizer and manganese sulfate products provide economic benefits for enterprises. The method realizes recycling of manganese-containing fly ash, is simple and practical, is feasible, is especially suitable for the recovery of potassium and has substantial the economic value.

Description

technical field [0001] The invention belongs to the field of resource recycling and chemical production, and in particular relates to a method for producing magnesium sulfate fertilizer and manganese sulfate by using manganese-containing dedusting ash. Background technique [0002] Manganese-containing dedusting ash is the dedusting ash obtained by bag-type dust collection of blast furnace flue gas produced by manganese separation by fire method. The main components are manganese, potassium oxide, and magnesium, and it also contains heavy metal components such as Pb, As, Cd, Ni, and Co. There are a large number of smelting blast furnaces in Shanxi, Inner Mongolia, and the surrounding areas of North China, which produce hundreds of thousands of tons of smelting manganese-containing dust ash every year, and the stockpiling over the years can reach several million tons. At present, most of these manganese-containing dedusting ash are simply piled up, resulting in a great waste...

Claims

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Application Information

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IPC IPC(8): C05D11/00C01G45/10
Inventor 白光郑和雁
Owner LINGQIU XINGGUANG MINING IND DEV CO LTD
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