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Electrolytic manganese slag source decrement method

A technology of electrolytic manganese slag and source, applied in the field of hydrometallurgical clean production, can solve problems such as failure to consider high moisture content of manganese slag

Active Publication Date: 2020-10-23
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Similarly, while strengthening the leaching of manganese ore, the problem of high moisture content in manganese slag due to the fine particles of manganese slag was not considered

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Take 50 kg of manganese carbonate ore powder, add 250 L of water according to the solid-to-liquid ratio of 1:5 to obtain the ore slurry, place the ore slurry on the reactor, add 90 mg of sodium oleate, and then add 13 L of 98% concentrated sulfuric acid. Control the temperature at 65°C and continue stirring. After 3.5 hours of leaching reaction, calcium oxide is added to the leached ore slurry according to the solid-to-liquid ratio to adjust the pH value to 6.6. After 1 hour of reaction, the manganese-containing solution and manganese slag are obtained through a filter press. In this example, 230 L of manganese-containing solution was finally obtained. The leaching rate of manganese was 82.23%, and the moisture content of manganese slag was 26.50%. .

Embodiment 2

[0019] Take 50 kg of manganese carbonate ore powder, add 225 L of water according to the solid-to-liquid ratio of 1:4.5 to obtain the ore slurry, place the ore slurry on the reactor, add 100 mg of trisodium citrate, and then add 12.5 L of 98% of concentrated sulfuric acid. Control the temperature at 55°C and continue stirring. After 4.5 hours of leaching reaction, add calcium carbonate and calcium oxide to the leaching slurry according to the solid-to-liquid ratio and react for 2 hours to adjust the pH value to 7. Manganese-containing solution and manganese slag are obtained through a filter press. In this example, 236 L of manganese-containing solution was finally obtained. The leaching rate of manganese was 98.08%, and the moisture content of manganese slag was 23.2%. .

Embodiment 3

[0021] Take 50 kg of manganese carbonate ore powder, add 250 L of water according to the solid-to-liquid ratio of 1:5 to obtain the ore slurry, place the ore slurry on the reactor, add 50 mg of sodium lauryl sulfate, and then add 12.5 L of 98% concentrated sulfuric acid. Control the temperature at 55°C and continue stirring. After 4.5 hours of leaching reaction, add ammonia water and calcium oxide to the leaching slurry according to the solid-to-liquid ratio and react for 2.5 hours to adjust the pH value to 7. Manganese-containing solution and manganese slag are obtained through a filter press. In this example, 231 L of manganese-containing solution was finally obtained. The leaching rate of manganese was 90.00%, and the moisture content of manganese slag was 24.38%. .

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PUM

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Abstract

The invention discloses an electrolytic manganese slag source decrement method. The method is characterized by comprising the following steps that ore slurry is prepared according to a certain solid-liquid ratio of rhodochrosite powder, the ore slurry is fed into a reactor, the proper reaction temperature and the mineral acid ratio are controlled, and after the ore slurry is stirred and mixed, a surfactant with a certain concentration range is added, the pH of the ore slurry is adjusted by adopting an alkaline agent after the reaction is finished, and solid-liquid separation is performed. Compared with a traditional non-surfactant process, the manganese leaching rate is increased by 7-14%, and the water content of manganese slag is reduced by 2-5%. According to the method, by adding the surfactant, the manganese slag particle size in the manganese ore leaching process can be regulated and controlled, the dispersion of manganese slag particles is strengthened, the utilization rate of manganese ore resources is improved, and valuable resources and pollutants entrained in the manganese slag are reduced. Compared with the prior art, the method has the advantages of being simple in process, low in cost and high in operability.

Description

technical field [0001] The invention relates to the field of clean production of hydrometallurgy, in particular to a method for source reduction of electrolytic manganese slag. Background technique [0002] Electrolytic manganese slag is a kind of industrial solid waste with high water content produced after manganese ore leaching in the process of wet electrolytic metal manganese production. Its main components are calcium sulfate dihydrate, silicon dioxide and a large amount of soluble manganese and ammonia nitrogen. In 2019, my country's electrolytic manganese production accounted for more than 98% of the world's total. With the development of my country's electrolytic manganese industry, the mainstream manganese ore grade in the market has dropped to 13%. Due to the low grade of manganese ore and low leaching efficiency, 8-10 tons of electrolytic manganese slag will be produced for every ton of manganese metal produced. There are 150 million to 160 million tons in my co...

Claims

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Application Information

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IPC IPC(8): C22B3/08C22B3/44C22B47/00
CPCC22B3/08C22B3/44C22B47/00Y02P10/20
Inventor 舒建成曾祥菲陈梦君王瑞黄金凤罗正刚赵航
Owner SOUTHWEAT UNIV OF SCI & TECH
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