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Method for preparing manganese sulfate solution by removing high-concentration SO2 in flue gas by using manganese carbonate ore

A manganese sulfate solution, manganese carbonate ore technology, applied in the directions of manganese sulfate, separation method, chemical instrument and method, can solve the problems of high production cost and low oxidation efficiency, and achieve low production and operation cost, removal and oxidation conversion efficiency High, wide-ranging effects

Active Publication Date: 2020-05-08
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art, to provide a method of utilizing manganese carbonate ore to remove high-concentration SO in flue gas 2 The method for preparing manganese sulfate solution, to solve the SO existing in the prior art 2 Oxidation efficiency is low, special oxidation treatment is required, resulting in high production costs, and the improvement of SO 2 Oxidation efficiency, lower production costs

Method used

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  • Method for preparing manganese sulfate solution by removing high-concentration SO2 in flue gas by using manganese carbonate ore
  • Method for preparing manganese sulfate solution by removing high-concentration SO2 in flue gas by using manganese carbonate ore
  • Method for preparing manganese sulfate solution by removing high-concentration SO2 in flue gas by using manganese carbonate ore

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Embodiment 1

[0031] The manganese carbonate ore used in this example is produced in Ghana, and the composition analysis of the manganese carbonate ore is shown in Table 1. Iron ore is used as the iron-containing auxiliary agent. The manganese carbonate slurry was prepared with the electrolytic manganese anolyte. The concentration of manganese sulfate in the electrolytic manganese anolyte was 39.8 g / L and the acid concentration was 34 g / L. The flue gas adopts laboratory simulation flue gas, and the specific composition is 5% SO 2 , 12% oxygen, the balance is nitrogen.

[0032] Table 1 Composition analysis of manganese carbonate ore

[0033]

[0034] Specific steps are as follows:

[0035] (1) Blending

[0036] ① The manganese carbonate ore is crushed and passed through a 100 mesh sieve to obtain manganese carbonate ore powder, and the iron-containing auxiliary agent is crushed and passed through a 100 mesh sieve.

[0037] ②Prepare desulfurization slurry for the feed of the final tower section: mix...

Embodiment 2

[0044] The manganese carbonate ore used in this example is produced in Guangxi, and the composition analysis of the manganese carbonate ore is shown in Table 2. High-speed iron waste slag is used as the iron-containing auxiliary agent. The manganese carbonate slurry was prepared with the electrolytic manganese anolyte. The concentration of manganese sulfate in the electrolytic manganese anolyte was 39.8 g / L and the acid concentration was 34 g / L. The flue gas adopts laboratory simulation flue gas, and the specific composition is 7% SO 2 , 12% oxygen, the balance is nitrogen.

[0045] Table 2 Composition analysis of manganese carbonate ore

[0046]

[0047] Specific steps are as follows:

[0048] (1) Blending

[0049] ① The manganese carbonate ore is crushed and passed through a 100 mesh sieve to obtain manganese carbonate ore powder, and the iron-containing auxiliary agent is crushed and passed through a 100 mesh sieve.

[0050] ②Preparation of desulfurization slurry for the feed of t...

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Abstract

The invention provides a method for preparing a manganese sulfate solution by removing high-concentration SO2 in flue gas through manganese carbonate ore. The method mainly comprises the following steps of: feeding high-concentration SO2 flue gas from a first-stage tower section of a multi-stage spray tower, feeding desulfurization slurry from a last-stage tower section of the multi-stage spray tower, carrying out continuous graded feeding on each stage of tower section so that the pH value and the manganese-iron ratio of the desulfurization slurry in each stage of tower section are controlledto be in a proper range, wherein the desulfurization slurry and the flue gas reversely flow among tower sections of the multi-stage spray tower and the desulfurization slurry is circularly sprayed ineach tower section of the multi-stage spray tower to be in contact reaction with the flue gas entering from the lower part of the tower section, so that SO2 in the flue gas is removed and manganese in manganese carbonate ore is leached, discharging a manganese sulfate solution product from the first-stage tower section, and discharging fully desulfurized flue gas from the last-stage tower section. The method provided by the invention utilizes ferromanganese to synergistically catalyze desulfurization, and has the characteristics of high SO2 oxidation efficiency and low production cost.

Description

Technical field [0001] The invention relates to the technical field of hydrometallurgy and flue gas sulfur resource-based pollution treatment, and relates to a method for removing high-concentration SO in flue gas by using manganese carbonate ore 2 Method of preparing manganese sulfate solution. Background technique [0002] Manganese slurry flue gas desulfurization technology has been developed rapidly in the past ten years. This technology uses manganese oxide and SO in natural manganese ore 2 Realize SO through redox reaction 2 It is removed from the flue gas and then oxidized to obtain a manganese sulfate solution. Compared with traditional desulfurization technology, manganese ore desulfurization technology effectively solves the problems of waste of sulfur resources and the difficulty of disposal of desulfurization wastewater. At the same time, this technology effectively combines air pollution control with manganese metallurgical technology, and proposes the development of ...

Claims

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Application Information

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IPC IPC(8): B01D53/80C01G45/10B01D53/50
CPCB01D53/50B01D53/80B01D2258/0283C01G45/10
Inventor 蒋文举杨林
Owner SICHUAN UNIV
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