Process for producing electrolytic manganese metal by using charcoal powder to reduce and convert manganese oxide ore

A technology for electrolytic manganese metal and manganese oxide ore, which is applied in the direction of photography technology, photography auxiliary technology, instruments, etc., can solve the problems of unable to replace manganese carbonate ore, large coal consumption, high energy consumption and pollution, etc., and achieves huge market application prospects and economic efficiency, production cost reduction, and the effect of solving supply shortages

Inactive Publication Date: 2011-10-12
段友构
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, several enterprises have been using manganese oxide ore to produce electrolytic manganese metal process tests, mainly using fire reduction or wet reduction, but these two methods cannot replace manganese carbonate ore due to their high cost.
Among them, the fire method reduction conversion method is more common, but because the roasting furnaces used by many manufacturers are reverberatory furnaces that are simple and easy to manufacture, but have high energy consumption and relatively high pollution. The production process of the fire method mostly uses coal as the reducing agent, and a large amount of SO is produced during the roasting process. 2 Flue gas, and serious dust pollution, large coal consumption

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Take 500g of manganese oxide ore (containing 20.13% manganese) crushed through a 100-mesh sieve and mix evenly with 15g of carbon powder, put it into a rotary roaster at a temperature of 500°C and a pressure of 1.013×10 5 pa, rotating speed 60 rpm, roasting for 1.5 hours. Reduce the manganese oxide ore to generate MnO, and then leaching it with 1mol / L sulfuric acid at room temperature to obtain a manganese sulfate solution containing impurities. The obtained manganese sulfate solution is prepared into an electrolyte by a series of processes such as neutralization, purification and filtration of the manganese sulfate solution according to the existing electrolytic manganese production process, and then it can enter the electrolytic cell for electrolytic production of electrolytic manganese metal. After testing, the conversion rate of manganese oxide is 85%, and the manganese leaching rate is 98%.

Embodiment 2

[0017] Take 500g of manganese oxide ore (containing 20.13% manganese) that has been crushed through a 100-mesh sieve and mix evenly with 15g of carbon powder, and put it into a rotary roaster at a temperature of 950°C and a pressure of 1.013×10 5 pa, rotating speed 60 rpm, roasting for 2 hours. Reduce manganese oxide ore to generate MnO, and then leaching with 2mol / L sulfuric acid at 35°C to obtain a manganese sulfate solution containing impurities. The obtained manganese sulfate solution is prepared into an electrolyte by a series of processes such as neutralization, purification and filtration of the manganese sulfate solution according to the existing electrolytic manganese production process, and then it can enter the electrolytic cell for electrolytic production of electrolytic manganese metal. After testing, the conversion rate of manganese oxide is 95%, and the leaching rate of manganese is 98%.

Embodiment 3

[0019] Take 500g of manganese oxide ore (containing 20.13% manganese) that has been crushed through a 60-mesh sieve and mix evenly with 15g of carbon powder, and put it in a rotary roaster at a temperature of 950°C and a pressure of 1.013×10 5 pa, rotating speed 60 rpm, roasting for 2 hours. Reduce the manganese oxide ore to generate MnO, and then leaching it with 1mol / L sulfuric acid at room temperature to obtain a manganese sulfate solution containing impurities. The obtained manganese sulfate solution is prepared into an electrolyte by a series of processes such as neutralization, purification and filtration of the manganese sulfate solution according to the existing electrolytic manganese production process, and then it can enter the electrolytic cell for electrolytic production of electrolytic manganese metal. After testing, the conversion rate of manganese oxide is 90%, and the leaching rate of manganese is 98%.

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Abstract

The invention discloses a process for producing electrolytic manganese metal by using charcoal powder to reduce and convert manganese oxide ore. The process comprises the following steps of: crushing and sieving the manganese oxide ore and charcoal respectively, mixing the manganese oxide ore powder and the charcoal powder uniformly in a certain ratio, putting the mixed powder into a rotary roasting furnace, reacting for 1 to 2 hours at a certain temperature under certain pressure intensity so that the manganese oxide ore is reduced into MnO, and leaching in sulfuric acid of certain concentration at a certain temperature to obtain impurity-containing manganese sulfate solution; and preparing electrolyte by the conventional process for producing electrolytic manganese, and performing electrolysis in an electrolytic bath to produce the electrolytic manganese metal. By the process, the problem of tight supply of manganese carbonate ore can be solved, the production cost is remarkably reduced, and the cost of the ore is only 1/5 of the total cost of electrolytic manganese production; and compared with the cost of the conventional production process (using manganese carbonate as a raw material), the comprehensive cost of the process can be reduced by 10 to 15 percent.

Description

technical field [0001] The invention relates to a production process of electrolytic manganese metal, in particular to a process for producing electrolytic manganese metal by reducing and transforming manganese oxide ore with carbon powder. Background technique [0002] my country is a big producer of electrolytic manganese. There are thousands of manufacturers of electrolytic manganese and manganese series products, with annual production and sales exceeding one million tons. At present, the production of electrolytic manganese mainly uses manganese carbonate ore as raw material. Due to fierce market competition, coupled with the random mining of manganese carbonate ore in some places, mining rich and abandoning the poor, manganese carbonate ore resources are becoming increasingly scarce, and the ore grade has also changed from about 20% of the original Dropped to about 10%, the ore cost of producing electrolytic manganese has accounted for more than 1 / 3 of the total cost. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/02C22B3/08C25C1/10
Inventor 段友构
Owner 段友构
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