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Technology for preparing manganese carbonate from silver-manganese ores

A technology of silver manganese ore and manganese carbonate, applied in the field of manganese carbonate preparation

Inactive Publication Date: 2015-01-21
无锡永发电镀有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The production of manganese carbonate in my country mostly uses rhodochrosite and pyrolusite as raw materials, and manganese carbonate is prepared from the manganese leaching solution of silver manganese ore. There is no report of the same process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A kind of technique of producing manganese carbonate from silver manganese ore, it comprises the following steps:

[0034] Preparation of silver-manganese ore leaching manganese solution: use pyrolusite (MnO2) as oxidant, in sulfuric acid 4N, catalyst 0.4N, liquid-solid ratio L / S=3, pyrolusite content is 40% of silver-manganese concentrate, temperature 90°C , leaching under the condition of time 2h;

[0035] Neutralization: Use rhodochrosite (MnCO3) as a neutralizing agent to neutralize the sulfuric acid in the manganese leaching solution at 80°C, and the amount of manganese carbonate added is controlled by the end point pH=1.

[0036] E.Z. Iron removal by goethite method: add pyrolusite at 80°C to oxidize ferrous iron to ferric iron; use lime as neutralizer, end point pH=5.5, keep warm for 45 minutes after the reaction reaches the end point.

[0037] Removal of heavy metals by vulcanization method: use ethyl sulfur nitrogen as a precipitating agent to remove heavy met...

Embodiment 2

[0041] A kind of technique of producing manganese carbonate from silver manganese ore, it comprises the following steps:

[0042] Preparation of silver manganese ore leaching manganese solution: use pyrolusite (MnO2) as oxidant, sulfuric acid 3.5N, catalyst 0.35N, liquid-solid ratio L / S=2.5, pyrolusite content is 35% of silver manganese concentrate, temperature 85 ℃, time 1.5h under the condition of leaching;

[0043] Neutralization: using rhodochrosite (MnCO3) as a neutralizing agent to neutralize the sulfuric acid in the manganese immersion solution at 75°C, the amount of manganese carbonate added is controlled with the end point pH=1;

[0044] E.Z. Iron removal by goethite method: add pyrolusite at 75°C to oxidize ferrous iron to ferric iron; use lime as neutralizer, end point pH=5, keep warm for 0.5 hours after the reaction reaches the end point;

[0045] Sulfurization method to remove heavy metals: use ethyl sulfur nitrogen as a precipitating agent to remove heavy metal im...

Embodiment 3

[0049] A kind of technique of producing manganese carbonate from silver manganese ore, it comprises the following steps:

[0050] Preparation of silver manganese ore leaching manganese solution: use pyrolusite (MnO2) as oxidant, in sulfuric acid 4.5N, catalyst 0.45N, liquid-solid ratio L / S=3.5, pyrolusite content is 45% of silver manganese concentrate, temperature 95 ℃, time 2.5h under the condition of leaching;

[0051] Neutralization: Use rhodochrosite (MnCO3) as a neutralizing agent to neutralize the sulfuric acid in the manganese immersion solution at 85°C, and the amount of manganese carbonate added is controlled with the end point pH=1;

[0052] E.Z. Iron removal by goethite method: add pyrolusite at 85°C to oxidize ferrous iron to ferric iron; use lime as neutralizer, end point pH=6, keep warm for 1 hour after the reaction reaches the end point;

[0053] Sulfurization method to remove heavy metals: use ethyl sulfur nitrogen as a precipitating agent to remove heavy meta...

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PUM

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Abstract

The invention relates to a technology for preparing manganese carbonate from silver-manganese ores. The manganese leaching rate of the technology is greater than 98%, and the later stage silver leaching rate can reach 95%; Fe in a manganese leaching liquid can be completely removed through pre-oxidation and an E.Z. goethite process, and the Fe content in the iron removed liquid is less than 1mg / L, so the iron removal rate reaches 99.99%; heavy meal impurities in the manganese leaching liquid can be removed through a sulfuration process, and the removal rates of Co, Ni and Zn reach 97.19%, 99.84% and 72.10% respectively, so the purifying effect is good; and a manganese carbonate product is successfully prepared, and the quality of the product reaches requirements of one-grade products.

Description

technical field [0001] The invention relates to the field of manganese carbonate preparation, in particular to a process for preparing manganese carbonate from silver manganese ore. Background technique [0002] In recent years, silver-manganese deposits have been discovered in many provinces in my country. The manganese content in these deposits is generally 10%-30%, and the silver grade is 150g / t to several kg / t. my country's proven reserves of silver-manganese ore have reached thousands of tons (calculated as silver metal), but due to unresolved technical problems in dressing and smelting, this type of ore in my country has not been effectively developed and utilized. The manganese in silver-manganese ore is mainly oxidized minerals such as pyrolusite and hard manganese ore, which mainly exist in the form of MnO2 and MnS. The associated silver minerals mainly exist in the form of natural silver, gold-silver ore, silver-gold ore, etc., in the form of fine particles. It is...

Claims

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Application Information

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IPC IPC(8): C22B3/08C22B47/00
Inventor 石明
Owner 无锡永发电镀有限公司
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