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Technological process for producing manganese oxide mineral powder using industrial microwave furnace

A microwave and kiln technology, applied in the field of ore processing, can solve the problems of unstable product quality, uneven heating of materials, low utilization rate of raw materials, etc., and achieve the effects of improving utilization rate of raw materials, shortening production cycle, and high utilization rate of raw materials

Inactive Publication Date: 2012-07-25
湖南阳东微波科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The defect of adopting the above method to reduce soft iron ore lies in the following two points: the first, the material is heated unevenly, the product quality is unstable, and the utilization rate of raw materials is low; can be higher

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 1. Select pyrolusite with a particle size of 0.4 mm to 0.6 mm, mix the above pyrolusite with anthracite ash at a ratio of 1:0.34, and then agglomerate the mixed material to obtain a mixture.

[0042]2. Put the mixture obtained in step 1 into the sagger and put it on the push plate, and send it to the sintering area and cooling area of ​​the microwave high-temperature kiln in turn. The air pressure in the kiln is 0.1MPa~0.15MPa; The frequency is 2450MHz, the power is 75KW, the sintering temperature is 850°C, the sintering time is 2h, and the pushing plate speed is 3.5m / h; the cooling method of the kiln body in the cooling zone is water cooling, and the mixture is cooled to below 100°C before exiting the kiln.

Embodiment 2

[0044] 1. Select pyrolusite with a particle size of 0.08 mm to 0.15 mm, mix the above pyrolusite with activated carbon at a ratio of 1:0.25, and then agglomerate the mixed material to obtain a mixture.

[0045] 2. Put the mixture obtained in step 1 into the sagger and put it on the push plate, and send it to the sintering area and cooling area of ​​the microwave high-temperature kiln in turn. The air pressure in the kiln is 0.1MPa~0.15MPa; The frequency is 2450MHz, the power is 65KW, the sintering temperature is 840°C, the sintering time is 2.5h, and the pushing plate speed is 3m / h; the cooling method of the kiln body in the cooling zone is water cooling, and the mixture is cooled to below 100°C before exiting the kiln.

Embodiment 3

[0047] 1. Select pyrolusite with a particle size of 0.8 mm to 1 mm, mix the above pyrolusite with charcoal at a ratio of 1:0.45, and then agglomerate the mixed material to obtain a mixture.

[0048] 2. Put the mixture obtained in step 1 into the sagger and put it on the push plate, and send it to the sintering area and cooling area of ​​the microwave high-temperature kiln in turn. The air pressure in the kiln is 0.1MPa~0.15MPa; The frequency is 2450MHz, the power is 85KW, the sintering temperature is 850°C, the sintering time is 1.5h, and the pushing plate speed is 4m / h; the cooling method of the kiln body in the cooling zone is water cooling, and the mixture is cooled to below 100°C before exiting the kiln.

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Abstract

The invention provides a pyrolusite reduction method, comprising the following steps of: mixing the pyrolusite and reductant and agglomerating the mixture to obtain mixtures; feeding the mixtures into a microwave high-temperature kiln to microwave sinter the mixtures at the microwave sintering frequency of 2450MHz and the sintering temperature of 800-900 DEG C; and cooling the sintered mixtures to obtain manganese oxide. The microwave sintering way provides the energy to the reduction reaction and during the sintering process, the mixtures quickly absorb the microwave energy from inwards to outwards, the whole body of the material is uniformly heated, and the heated uniformity of the raw material is improved, thus the pyrolusite completely participates into the reduction reaction and the utilization rate of the raw material is increased. In addition, the heating way makes the mixtures achieve the temperature required by the reduction reaction n short time, furthermore the production period is shortened and the energy consumption is also reduced.

Description

technical field [0001] The invention relates to the field of ore processing, in particular to a process for producing manganese oxide ore powder with an industrial microwave kiln. Background technique [0002] Manganese and its compounds have important applications in industrial production. Among them, the iron and steel industry is the most important application field of manganese, and manganese is a deoxidizer and desulfurizer for ironmaking and steelmaking. In addition, manganese is a coloring and discoloring agent for glass and ceramics. Manganese can also be used to prepare batteries, matches, printing paint, alloys, etc. It also has important applications in light industry, building materials industry, and electrical industry. [0003] Common manganese ores include pyrolusite, hard manganese ore, black manganese ore, brown manganese ore and rhodochrosite. Pyrolulusite is an important ore raw material for manganese smelting. my country's pyrolusite reserves are abun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/16C22B47/00
Inventor 刘伏初李蔚霞陶立平
Owner 湖南阳东微波科技有限公司
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