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Using Manganese Carbonate to Remove High Concentration SO from Flue Gas 2 The method for preparing manganese sulfate solution

A technology of manganese sulfate solution and manganese carbonate ore, which is applied in the direction of manganese sulfate, separation methods, chemical instruments and methods, can solve the problems of high production cost and low oxidation efficiency, and achieve low production and operation costs, removal and oxidation conversion efficiency The effect of high and low investment and operating production costs

Active Publication Date: 2021-03-23
SICHUAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Using Manganese Carbonate to Remove High Concentration SO from Flue Gas <sub>2</sub> The method for preparing manganese sulfate solution
  • Using Manganese Carbonate to Remove High Concentration SO from Flue Gas <sub>2</sub> The method for preparing manganese sulfate solution
  • Using Manganese Carbonate to Remove High Concentration SO from Flue Gas <sub>2</sub> The method for preparing manganese sulfate solution

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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. The iron-containing auxiliary agent adopts iron ore. 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 the simulated flue gas in the laboratory, and the specific composition is 5% SO 2 , 12% oxygen, the balance being nitrogen.

[0032] Table 1 Composition analysis of manganese carbonate ore

[0033]

[0034] Specific steps are as follows:

[0035] (1) mix pulp

[0036] ① Grinding the manganese carbonate ore and passing through a 100-mesh sieve to obtain manganese carbonate ore powder, and crushing the iron-containing auxiliary agent and passing through a 100-mesh sieve.

[0037] ② Prepare the desulfurization slurry used for feeding...

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. The iron-containing auxiliary agent adopts high-iron waste slag. Prepare manganese carbonate slurry with electrolytic manganese anolyte, the concentration of manganese sulfate in the electrolytic manganese anolyte is 39.8g / L, and the acid concentration is 34g / L. The flue gas adopts the simulated flue gas in the laboratory, and the specific composition is 7% SO 2 , 12% oxygen, the balance being nitrogen.

[0045] Table 2 Composition analysis of manganese carbonate ore

[0046]

[0047] Specific steps are as follows:

[0048] (1) mix pulp

[0049] ① Grinding the manganese carbonate ore and passing through a 100-mesh sieve to obtain manganese carbonate ore powder, and crushing the iron-containing auxiliary agent and passing through a 100-mesh sieve.

[0050] ② Prepare the desulfurization slurry used for feeding th...

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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 pollution control, and relates to a method for removing high-concentration SO in flue gas by using manganese carbonate ore. 2 Method for preparing manganese sulfate solution. Background technique [0002] Manganese ore slurry flue gas desulfurization technology has been developed rapidly in the past ten years. This technology utilizes manganese oxide and SO in natural manganese ore 2 Realization of SO through redox reactions 2 Removal from flue gas, and then oxidation to obtain manganese sulfate solution. Compared with the traditional desulfurization technology, manganese ore desulfurization technology effectively solves the problems of waste of sulfur resources and difficult treatment of desulfurization waste water and residue. a new direction. However, in the existing technical reports on desulfurization control and resource utilization of manganese ore p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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