Method for removing sulfur dioxide in smoke by using manganese carbonate ore and preparing manganese sulfate solution

A technology of manganese sulfate solution and manganese carbonate ore, applied in the direction of manganese sulfate, chemical instruments and methods, separation methods, etc., can solve the problems affecting the long-term process, continuous stability, lower than the national environmental protection emission standards, and affecting the application of desulfurization process, etc., to achieve The effects of fast filtration and impurity removal, easy reaction process, and low production cost

Inactive Publication Date: 2018-05-15
贵州大龙汇成新材料有限公司
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  • Abstract
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Problems solved by technology

[0003] In recent years, only a small number of documents and patent applications have proposed a process technology that combines flue gas desulfurization with manganese sulfate production. These processes are mainly divided into two types: one is wet desulfurization with manganese dioxide ore powder, and porous Plate tower, turbulent ball tower, packed tower, jet bubbling tower, spray tower and other commonly used chemical gas absorption towers are used as reactors to make the flue gas containing sulfur dioxide react with manganese dioxide raw materials in the absorption tower, and the absorption effect is very good. Well, the content of sulfur dioxide gas after absorption is far lower than the national environmental protection emission standards; but the manganese dioxide slurry in this type of method will gradually block in the tower after running for a period of time, and the air

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  • Method for removing sulfur dioxide in smoke by using manganese carbonate ore and preparing manganese sulfate solution

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Embodiment 1

[0035] In this embodiment, the raw material manganese carbonate ore from somewhere in Guizhou is used. The ore contains Mn8.8%, Ca8%, Mg0.5%, Fe1.9%.

[0036] A kind of method of using above-mentioned manganese carbonate of the present invention to remove sulfur dioxide in flue gas and produce manganese sulfate solution, process flow chart is as figure 1 shown, including the following steps:

[0037] (1) Grinding and pulping: Use a crusher to crush the manganese carbonate ore until the maximum particle size does not exceed 6mm, transport the manganese carbonate ore into the ball mill and add water at a solid-to-liquid ratio of 1:1.5 for wet ball milling, wet method After ball milling, use a hydrocyclone to classify, overflow to the slurry transfer barrel, and obtain manganese carbonate slurry. According to the particle size test of the BT-9300HT laser particle size distribution analyzer, the particle size of the ore in the reaction slurry is less than 45 μm, accounting for 92...

Embodiment 2

[0042] In this embodiment, manganese carbonate ore powder from a certain place in Guizhou is used. The ore contains 10.8% Mn, 5.4% Ca, 0.5% Mg, and 1.8% Fe.

[0043] A method of removing sulfur dioxide in flue gas and producing manganese sulfate solution with above-mentioned manganese carbonate ore powder of the present invention, comprises the following steps:

[0044] (1) Grinding and pulping: the maximum particle size of the manganese carbonate ore powder in this embodiment is no more than 0.3mm, and the manganese carbonate ore powder is transported into the ball mill and added with water at a solid-to-liquid ratio of 1:1.2 for wet ball milling. Use the hydrocyclone to classify, overflow to the slurry transfer barrel, and obtain the manganese carbonate slurry. According to the particle size test of the BT-9300HT laser particle size distribution analyzer, the particle size of the ore in the reaction slurry is less than 45 μm, accounting for 95%.

[0045] (2) Absorption desu...

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Abstract

The invention provides a method for removing sulfur dioxide in smoke by using manganese carbonate ore and preparing a manganese sulfate solution. The method comprises the following steps: (1) introducing smoke comprising the sulfur dioxide into an absorption apparatus with manganese carbonate ore slurry, controlling a flow rate of the smoke at 1 to 4.5 m<3>/s, controlling a liquid-gas ratio of theore slurry to the smoke at 12 to 35 L/m<3>, performing the reaction, obtaining slurry and discharged smoke, wherein the concentration of sulfur dioxide in the smoke reaches the environment-friendly emission requirement; and (2) introducing oxide gas into the slurry after step (1), reacting for 1 to 4 hours, after the reaction is ended, filtering, removing the filter residue, removing impurities of the filtrate, and obtaining a manganese sulfate solution. By adopting the method of the invention, the whole reaction process is easy to control. The method has the advantages of energy conservation, environmental protection, good smoke desulphurization effect, low production cost and the like and is easy in industrialized and continuous production.

Description

technical field [0001] The invention belongs to the intersecting technical field of hydrometallurgy and environmental protection, and in particular relates to a method for removing sulfur dioxide in flue gas and preparing manganese sulfate solution by using manganese carbonate ore powder. Background technique [0002] Wet flue gas desulfurization has been widely used in coal-fired power plants and small and medium-sized coal-fired boilers, and has become the leading desulfurization technology adopted by coal-fired power plants in the world today. At present, in coal-fired power plants at home and abroad, wet flue gas desulfurization accounts for about 85% of the total flue gas desulfurization, and there is an increasing trend year by year. In the wet flue gas desulfurization of coal-fired power plants at home and abroad, the limestone / lime-gypsum method and the limestone / lime discarding method account for about 83% of the total flue gas desulfurization. The environment does...

Claims

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Application Information

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IPC IPC(8): B01D53/75B01D53/50C01G45/10
CPCB01D53/50B01D53/75B01D2251/102B01D2251/606B01D2258/0283C01G45/10Y02P20/10
Inventor 申喜元黄亚君姚文德姚金华彭天剑
Owner 贵州大龙汇成新材料有限公司
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