Method for producing MnO through reducing roasting of MnO ore by utilizing wood chips

A technology of manganese oxide and manganese monoxide, which is applied in the fields of metallurgy and chemical industry, can solve the problems of high equipment operation and maintenance costs, high production energy consumption, etc., and achieve the effects of high equipment operation and maintenance costs, high production energy consumption, and convenient operation

Inactive Publication Date: 2018-06-15
DAXIN MANGANESE MINE BRANCH OF CITIC DAMENG MINING IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the two documents mentioned above have improved the process steps and equipment used in the fire reduction roasting of manganese oxide ore, thereby reducing energy consumption and pollution, the reducing agent they use is sulfur or bituminous coal. The high temperature required for roasting leads to high production energy consumption, high equipment operation and maintenance costs; and the high heating temperature is also a technical bottleneck for enterprises to realize continuous production

Method used

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  • Method for producing MnO through reducing roasting of MnO ore by utilizing wood chips
  • Method for producing MnO through reducing roasting of MnO ore by utilizing wood chips
  • Method for producing MnO through reducing roasting of MnO ore by utilizing wood chips

Examples

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Effect test

Embodiment 1

[0022] A method for producing manganese monoxide by reducing and roasting manganese oxide ore with sawdust, comprising the following steps:

[0023] (1) manganese oxide ore and sawdust are pulverized respectively through 10 mesh sieves; described manganese oxide ore is pyrolusite; the weight percentage of moisture in the described sawdust is 15%;

[0024] (2) Mix the pulverized manganese oxide ore and wood chips evenly to obtain a mixed material, and the amount of wood chips is 30% of the weight of the manganese oxide ore;

[0025] (3) Put the mixed material into the rotary roasting kiln and roast at 300°C for 70 minutes,

[0026] The roasted material enters the cooling kiln through the unloading device, and is cooled to within 100°C in an air-isolated environment to obtain the roasted material containing MnO.

Embodiment 2

[0028] A method for producing manganese monoxide by reducing and roasting manganese oxide ore with sawdust, comprising the following steps:

[0029] (1) manganese oxide ore and sawdust are pulverized respectively through a 50 mesh sieve; described manganese oxide ore is manganese ore and black manganese ore; the weight percentage of moisture in the described sawdust is 24%;

[0030] (2) Mix the pulverized manganese oxide ore and wood chips evenly to obtain a mixed material, and the amount of wood chips is 34% of the weight of the manganese oxide ore;

[0031] (3) Put the mixed material into the rotary roasting kiln and roast at 400°C for 60 minutes,

[0032] The roasted material enters the cooling kiln through the unloading device, and is cooled to within 100°C in an air-isolated environment to obtain the roasted material containing MnO.

Embodiment 3

[0034] A method for producing manganese monoxide by reducing and roasting manganese oxide ore with sawdust, comprising the following steps:

[0035] (1) manganese oxide ore and sawdust are pulverized respectively through 100 mesh sieves; described manganese oxide ore is brown manganese ore, hydromanganese ore and metamanganate; the weight percentage of moisture in the described sawdust is 30%;

[0036] (2) Mix the pulverized manganese oxide ore and wood chips evenly to obtain a mixed material, and the amount of wood chips is 36% of the weight of the manganese oxide ore;

[0037] (3) Put the mixed material into the rotary roasting kiln and roast at 500°C for 45 minutes,

[0038] The roasted material enters the cooling kiln through the unloading device, and is cooled to within 100°C in an air-isolated environment to obtain the roasted material containing MnO.

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PUM

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Abstract

The invention belongs to the fields of metallurgy and chemical engineering, and particularly relates to a method for producing MnO through the reducing roasting of MnO ore by utilizing wood chips. According to the method, the wood chips are adopted as a reductant, so that the MnO ore can be reduced into MnO under the condition of low temperature (300-500 DEG C); consequently, the production energyconsumption can be greatly reduced and the service life of equipment can be prolonged; the method is simple in process, convenient to operate, low in roasting temperature, and high in efficiency of the conversion from high-valent Mn to bivalent Mn; the cost of the reducing roasting of the MnO ore can be remarkably reduced; and furthermore, qualified MnO can be produced by adopting the method.

Description

technical field [0001] The invention belongs to the field of metallurgy and chemical industry, and in particular relates to a method for preparing manganese monoxide by reducing and roasting manganese oxide ore with sawdust. Background technique [0002] my country's manganese ore resources are mainly divided into two types: manganese oxide ore and manganese carbonate ore. Manganese carbonate ore is mainly used to produce electrolytic manganese, and the technology is mature and widely used at home and abroad. With the development of the manganese industry, the supply of high-quality manganese carbonate ore resources is becoming increasingly tight, which limits the development of the electrolytic manganese industry to a certain extent. High-grade and high-priced manganese ore can be used as a high-quality raw material for the preparation of manganese sulfate and electrolytic manganese in industry due to its low impurity content. However, manganese oxide minerals are general...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/02C22B47/00
CPCC22B1/02C22B47/00
Inventor 何溯结闭伟宁杨勇谢彦魏汉可陈南雄廖赞伟方广盛韦旭甜严超廖英欢
Owner DAXIN MANGANESE MINE BRANCH OF CITIC DAMENG MINING IND
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