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Organic-inorganic combined pyrolusite reduction method

A technology of inorganic composite and pyrolusite powder, which is applied in the field of wet reduction pyrolusite

Inactive Publication Date: 2014-07-23
GUANGXI UNIV FOR NATITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The first purpose of the present invention is to overcome the complex oxidation products of the reducing agent in the pyrolusite organic reduction method, which causes corrosion of the anode plate, low current efficiency, and difficulty in waste liquid treatment The second is to overcome the low manganese leaching rate and the deficiency of by-products in the inorganic reduction method of pyrolusite, and provide a method for organic-inorganic composite reduction of pyrolusite that does not produce or reduce organic products or inorganic by-products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1. Raw material composition and weight:

[0032] 10 kg of pyrolusite, 0.3 kg of oxalic acid, 1 kg of iron filings and ferrous sulfate, 12 kg of concentrated sulfuric acid, 90 kg of water, and 0.01 kg of impurity remover potassium permanganate.

[0033] 2. Preparation method:

[0034] Add 90 kg of water to the reaction kettle, add 10 kg of pyrolusite powder under stirring, slowly add 12 kg of concentrated sulfuric acid, and continue stirring for 10 minutes; then add 0.3 kg of oxalic acid, 1 kg of iron filings, and ferrous sulfate in turn. React at 50°C for 4 hours; filter the reaction materials according to conventional methods to obtain manganese sulfate solution; add 0.01 kg of impurity remover potassium permanganate, stir and react at 50°C for 60 minutes, and filter; measure manganese in manganese sulfate solution according to conventional methods content, calculate the manganese leaching rate, and use high performance liquid phase to measure the organic matter conte...

Embodiment 2

[0036] 1. Raw material composition and weight:

[0037] 10 kg of pyrolusite, 0.2 kg of glucose, 0.5 kg of sulfurous acid and ammonium sulfite, 20 kg of concentrated sulfuric acid, 100 kg of water, and 0.05 kg of impurity remover hydrogen peroxide.

[0038] 2. Preparation method:

[0039] Add 100 kg of water to the reaction kettle, add 10 kg of pyrolusite powder under stirring, slowly add 20 kg of concentrated sulfuric acid, and continue stirring for 30 minutes; then add 0.2 kg of glucose, 0.5 kg of sulfurous acid and ammonium sulfite in sequence, After reacting at low temperature for 3 hours, heat up to react at 95°C for 2 hours; filter the reaction materials according to the conventional method to obtain a manganese sulfate solution; The content of manganese in manganese sulfate solution was determined, the leaching rate of manganese was calculated, and the content of organic matter was determined by HPLC. In this example, the leaching rate of manganese is 95.11%, and the o...

Embodiment 3

[0041] 1. Raw material composition and weight:

[0042] 10 kg of pyrolusite, 0.3 kg of molasses, 2 kg of carbon powder, 15 kg of concentrated sulfuric acid, 80 kg of water, and 0.02 kg of ammonium persulfate for removing impurities.

[0043] 2. Preparation method:

[0044]Add 80 kg of water to the reaction kettle, add 10 kg of pyrolusite powder under stirring, slowly add 15 kg of concentrated sulfuric acid, and continue stirring for 30 minutes; then add 0.3 kg of molasses and 2 kg of carbon powder in sequence, and react at 95°C for 4 hours ; The reaction material is filtered according to a conventional method to obtain a manganese sulfate solution; then add 0.02 kg of impurity remover ammonium persulfate, continue to react for 1.5 hours at 45°C, and filter; measure the manganese content in the manganese sulfate solution according to a conventional method, and calculate the manganese leaching Rate, while using high performance liquid phase determination of organic matter conte...

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Abstract

The invention discloses an organic-inorganic combined pyrolusite reduction method. In 10 parts (by weight) of pyrolusite powder, raw material ingredients are as follows in parts by weight: 0.1-0.3 part of organic reducing agent, 1-3 parts of inorganic reducing agent, 12-20 parts of concentrated sulfuric acid, 80-100 parts of water and 0.01-0.05 part of impurity remover. The method comprises the processes of infiltration reaction, one-step reduction, filtration and impurity removal, namely comprises the concrete steps: reacting the pyrolusite powder and the concentrated sulfuric acid for 10-30 minutes; then, sequentially adding the organic reducing agent and the inorganic reducing agent, reacting for 3-5 hours at the temperature of 60-95 DEG C, filtrating, then, adding the 0.01-0.05 part of impurity remover at the temperature of 35-50 DEG C, and reacting for 0.5-1.5 hours. According to the method, the leaching rate of manganese is higher than 90%, the problem of byproduct of a single organic reduction method is solved, and the problems of low manganese leaching rate or inorganic byproduct generation of a single inorganic reduction agent are solved; the manganese leaching rate is high, the cost of reducing agents is low, the requirements on reducing condition are low, the process is simple, the operation is easy, and the industrial production is facilitated, so that the method has relatively good economic and social benefits.

Description

Technical field [0001] The present invention involves the method of restoring soft manganese ore, and specially involves a method of organic-inorganic composite to restore soft manganese ore. Background technique [0002] The production electrolytic aggravation with soft manganese ore (dioxide) must first be the original manganese.There are two types of restoration methods: fire reduction and wet restoration.The wet reduction method is generally inorganic and organic reducing agents. Inorganic reducing agents include iron sulfate, hydrogen peroxide, sulfur dioxide, etc. These inorganic reducing agents are not ideal, some produce inorganic by -products, and some follow -up processing processesLong, some of the exhaust gas or liquids generated are large. Except for the two mineral methods, most of them do not have industrialized trial production. [0003] The wet process can also use organic matter and natural plant powder as a reducing agent for restoration.However, due to the uns...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/04
Inventor 袁爱群郭雨桐卢友志马少妹黄增尉明宪权李维健周泽广韦冬萍
Owner GUANGXI UNIV FOR NATITIES
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