Manganese ore reduction calcination method and apparatus

A manganese ore and roasting technology is applied in the field of manganese dioxide ore reduction roasting into manganese monoxide, which can solve the problems of unreasonable design of roasting chamber and incomplete reaction of manganese dioxide, so as to achieve the same quality, production cost and roasting time , Guarantee the effect of product quality

Inactive Publication Date: 2009-04-22
朱军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of this roasting furnace is that the design of the roasting chamber is unreasonable, and the manganese dioxide ore powder is exposed to too much oxygen during the roasting process, resulting in incomplete reaction of part of the manganese dioxide.

Method used

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  • Manganese ore reduction calcination method and apparatus
  • Manganese ore reduction calcination method and apparatus
  • Manganese ore reduction calcination method and apparatus

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Experimental program
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Effect test

Embodiment 1

[0044] After drying, the manganese dioxide ore particle size <15mm and coke powder are evenly stirred at a ratio of 10:0.5, and then transported to the feeding bin at the top of the roasting chamber, and continuously and slowly enter the tubular roasting under the action of the automatic disc feeding device and gravity. inside the barrel. Manganese dioxide ore and reduced powder are heated and roasted to 920°C-950°C in a closed roasting cylinder, then cooled to about 250°C in a closed "oxygen-free" air waste heat recovery section, and then enter a closed "oxygen-free" water cooling section Medium cooling below 60°C, and finally discharged out of the furnace by an automatic discharge device with stepless speed regulation, and enters the next process. . Since the roasting material is not in contact with the external air in the waste heat recovery section and cooling section, it can effectively prevent the roasted manganese monoxide ore powder from reacting with the oxygen in th...

Embodiment 2

[0046] The dried manganese dioxide ore particle size <15mm and the reduced anthracite pulverized coal are evenly stirred at a ratio of 10:1, and are transported to the feeding bin at the top of the roasting chamber, and are continuously and slowly fed by the automatic disc feeding device and gravity. Inside the tubular roasting cylinder. Manganese dioxide ore and reduced powder are heated and roasted in a closed roasting cylinder to 930°C-970°C, then cooled to about 300°C in a closed "oxygen-free" air waste heat recovery section, and then enter a closed "oxygen-free" water cooling section Medium cooling below 60°C, and finally discharged out of the furnace by an automatic discharge device with stepless speed regulation, and enters the next process. . Since the roasting material is not in contact with the external air in the waste heat recovery section and cooling section, it can effectively prevent the roasted manganese monoxide ore powder from reacting with the oxygen in the...

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Abstract

The invention discloses a method and a device for reducing and roasting manganese dioxide into manganese monoxide in electrolytic manganese industry. The method comprises the following steps: dried manganese dioxide mineral powder is ground, well mixed with reducing powder and conveyed to a feeding bin on the top of a roasting furnace, and then enters hermetic roasting devices; a plurality of burners are arranged among the hermetic roasting devices; fuel is burnt so as to roast manganese dioxide ore; the manganese dioxide ore and the reducing powder are heated and roasted to 900 to 970 DEG C in the hermetic roasting devices with no oxygen supplement; under the circumstance of oxygen-free contact after reaction in the lower ends in the hermetic roasting devices, the temperature of roasted manganese ore is lowered, so as to recover heat and cool the manganese ore; and finally, the manganese ore is discharged out of a furnace by an automatic discharging device and then is subjected to a subsequent process. The method and the device can reduce and roast the high/low-grade manganese dioxide ore, have the advantages of low production cost, simple process and convenient operation, can control the reduction rate of manganese dioxide and other metals through the automatic discharging device, and improve the quality of final products.

Description

technical field [0001] The invention relates to a method and equipment for producing manganese monoxide, a raw material for electrolytic manganese, in particular to a method and equipment for manganese monoxide by reducing and roasting manganese dioxide ore powder. Background technique [0002] Manganese dioxide ore powder does not react with sulfuric acid under normal conditions, but after being roasted at high temperature and reduced to manganese monoxide, it can react with sulfuric acid to form manganese sulfate for electrolytic manganese production. The electrolytic manganese industry uses manganese dioxide ore powder after reduction and roasting. The production of electrolytic manganese from manganese oxide has entered the practical stage. The currently used roasting equipment includes: (1) reverberatory furnace, (2) fluidized fluidized furnace roasting, (3) shaft furnace, (4) rotary kiln, (5) microwave, etc. We first briefly describe the characteristics of these metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/02C22B5/10C22B47/00
Inventor 朱军
Owner 朱军
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