Method and device for reducing and baking for high-valent manganese minerals

A roasting device and high-priced manganese technology, which is applied in the field of electrolytic manganese metal roasting equipment, can solve the problems of increased reduction cost, complicated process, easy ring formation, etc., and achieve good reduction effect, sufficient reduction reaction, and long residence time.

Active Publication Date: 2009-12-02
CHANGSHA RES INST OF MINING & METALLURGY
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

Problems in rotary kiln reduction: large investment, easy to form rings, high coal consumption
[0005] At present, there are attempts in the industry to reduce pyrolusite with an externally heated electric

Method used

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  • Method and device for reducing and baking for high-valent manganese minerals
  • Method and device for reducing and baking for high-valent manganese minerals

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Embodiment Construction

[0026] The present invention will be further described in detail below in conjunction with specific embodiments and accompanying drawings.

[0027] The present invention is used for the reduction roasting method of high-valent manganese ore, and its steps are:

[0028] (1), combustible gas and air are passed into the burner 2 installed on the hot blast stove 3 and burned in the hot blast stove 3, and the air excess coefficient of the control combustion is 0.7~0.9, so that the temperature of the gas coming out of the hot blast stove 3 reaches 700-1000°C, the reducing atmosphere meets the process requirements of 3-10% CO, and then this gas is introduced from the bottom and side of the fluidized roaster 4;

[0029] (2) Finely grind the manganese ore until 80% passes through a 100-mesh sieve and lift it to the feeding bin 8 on the upper part of the reduction roasting device through the lifting conveying device 11, and then feed it into the suspension preheating assembly through th...

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Abstract

The invention provides a method and a device for reducing and baking for high-valent manganese minerals. The method comprises the following steps: (1) combusting combustible gas and air in a hot blast furnace through a nozzle, controlling coefficient of excess air to ensure that the gas of the hot blast furnace is required reduction atmosphere and temperature, and introducing a fluidized roaster; (2) finely grinding manganese minerals, feeding the manganese minerals into a suspension preheat assembly for sufficient heat exchange in several times, separating gas and mineral powder granules, and feeding the granules into the fluidized roaster for a reduction reaction; and (3) controlling the CO content and solid-gas ratio in the fluidized roaster; reducing manganese mineral powder in the fluidized roaster into acidsoluble manganous oxide, and discharging the manganous oxide from a solid material outlet of a cyclone preheater in the last stage. The device comprises a feed assembly, the suspension preheat assembly, the fluidized roaster, a dust-removal exhaust assembly, a gas feed assembly and a combustion assembly. The method and the device have the advantages of simple and compact structure, low cost, simple and convenient operation, good reduction effect, low energy consumption and the like.

Description

technical field [0001] The present invention mainly relates to the field of electrolytic manganese metal roasting equipment, in particular to a reduction roasting method and device for high-priced manganese minerals, which can be applied to pyrolusite, manganese ore, metamanganate, manganese ore, brown manganese ore or black manganese ore wait. Background technique [0002] In the past, there were several methods of reduction roasting in industry, including reverberatory furnace method, rotary kiln method, etc. The characteristics of the above methods are as follows: [0003] 1. Reverberatory furnace method: the reaction temperature is about 800°C, the reduction is carried out by anthracite coal powder mixed in the ore powder, and the furnace gas can be a neutral or slightly oxidizing atmosphere. The heating and reduction time is as long as 3.5 hours or more. The reducing agent is anthracite coal powder with little coking property, and the general calorific value is betwee...

Claims

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Application Information

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IPC IPC(8): C22B1/10C22B5/08C22B5/14
Inventor 侯拥和吴鋆欧召欧阳建侯季淹王朋生杨克辉彭伟
Owner CHANGSHA RES INST OF MINING & METALLURGY
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