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Method for preparing manganese sulfate solution with low manganous dithionate through desulfuration by using slurry prepared by anode liquid and manganese ore

A technology of manganese dithionate and anolyte, which is used in the improvement of process efficiency, photography process, instruments, etc., can solve the problems of small mass transfer driving force and so on.

Active Publication Date: 2018-06-22
四川恒泰环境技术有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the desulfurization process of sulfur-containing flue gas, due to the reaction consumption of desulfurizers, the mass transfer driving force of each stage of desulfurization is small. During the process, the manganese dithionate generated is not reduced

Method used

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  • Method for preparing manganese sulfate solution with low manganous dithionate through desulfuration by using slurry prepared by anode liquid and manganese ore
  • Method for preparing manganese sulfate solution with low manganous dithionate through desulfuration by using slurry prepared by anode liquid and manganese ore
  • Method for preparing manganese sulfate solution with low manganous dithionate through desulfuration by using slurry prepared by anode liquid and manganese ore

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] The temperature of flue gas to be treated entering the flue gas desulfurization system is 185°C, and the flue gas volume is 199,000m 3 / h, the composition of the flue gas is shown in Table 1 below.

[0064] Table 1 Smoke composition

[0065] components

N 2

CO 2

h 2 o

O 2

SO 2

Content, v%

65.28

16.00

11.18

2.78

4.75

[0066] The composition analysis in the manganese ore powder bin 32 is shown in Table 2 below.

[0067] Table 2 Composition of manganese ore powder

[0068]

[0069]

[0070] The composition of the electrolytic manganese anolyte used for slurry preparation is shown in Table 3 below.

[0071] Table 3 is used to configure the anolyte of manganese ore slurry

[0072] components

All Mn

Divalent Mn

H +

pH

Content g / l

14.19

13.41

14.74

0.35

[0073] The specific operation is as follows.

[0074] 1. The anolyte in the anolyte storage tank 30 is...

Embodiment 2

[0083] The temperature of the flue gas to be treated entering the flue gas desulfurization system is 200°C, and the flue gas volume is 158,000m 3 / h, the composition of the flue gas is shown in Table 4 below.

[0084] Table 4 Smoke composition

[0085] components

N 2

CO 2

h 2 o

O 2

SO 2

Content, v%

67.5

14.9

10.6

3.2

3.8

[0086] The composition analysis in the manganese ore powder bin 32 is shown in Table 5 below.

[0087] Table 5 Composition of manganese ore powder

[0088] components

All Mn

Tetravalent Mn

Divalent Mn

Content, wt%

37.48

16.90

4.52

[0089] The composition of the electrolytic manganese anolyte used for slurry preparation is shown in Table 6 below.

[0090] Table 6 is used to configure the anolyte of manganese ore slurry

[0091] components

All Mn

Divalent Mn

H +

pH

Content g / l

14.19

13.41

14.74

0.35

[...

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Abstract

The invention discloses a method for preparing a manganese sulfate solution with low manganous dithionate through desulfuration by using the slurry prepared by an anode liquid in electrolytic manganese production and manganese ore, and belongs to the field of electrolytic manganese production. According to method, the slurry prepared by the anode liquid and the manganese ore is used as a desulfurizing agent, meanwhile, a multi-stage spray washing tower with a sieve plate is additionally arranged for flue gas desulfurization and manganese immersion, after the obtained slurry is filtered, an oxidizing agent in the liquid phase is added to reduce the manganous dithionate in the slurry, so that the production of the electrolytic manganese and / or manganese sulfate is facilitate; the solid-phasesubstance obtained by filtering undergoes secondary acidolysis , and then the leaching rate of the manganese can be further improved; by adopting the process and the method, the leaching rate of themanganese can reach more than 94.3%, meanwhile, the high-concentration sulfur dioxide in the flue gas is reduced to the value lower than 100mg / m<3>, and the desulfurization efficiency can reach more than 99%; the prepared desulfurized manganese leaching solution is sent to an electrolysis section for electrolytic manganese production, the average single-shift yield is increased from 2.5kg-2.6kg inthe prior art to 3.1kg-3.2kg; and when the manganese sulfate solution which is prepared by the method and provided with the low manganous dithionate is used for electrolytic manganese production, theyield of the manganese can be improved, the plate loading rate of the manganese can be increased, the quality and the yield of the manganese can be improved, and the energy consumption and the production cost can be reduced.

Description

technical field [0001] The invention relates to the field of electrolytic manganese production, in particular to a method for preparing a manganese sulfate solution of low manganese dithionate by desulfurization and immersion of manganese in a slurry prepared by anolyte and manganese ore, that is, using a slurry prepared by electrolytic manganese anolyte and manganese ore to prepare a manganese sulfate solution by desulfurization and leaching of manganese ore Manganese dithionate in manganese sulfate solution method. The invention can be used in the fields of metallurgy and other environmental pollution control and resource utilization to realize the removal and resource utilization of high-concentration sulfur dioxide flue gas; when the prepared manganese sulfate solution with low manganese dithionate is used in the production of electrolytic manganese, it can Significantly improve the loading rate of manganese, improve the quality and yield of manganese, reduce energy consum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/02C22B3/08C22B3/44C22B3/22C22B47/00C25C1/10
CPCC22B3/02C22B3/08C22B3/22C22B3/44C22B47/00C25C1/10Y02P10/20
Inventor 任岷
Owner 四川恒泰环境技术有限责任公司
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