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Method for leaching manganese carbonate ore

A manganese carbonate ore, leaching technology, applied in the direction of improving process efficiency, to achieve the effect of wide adaptability, fast speed and saving production cost

Inactive Publication Date: 2015-06-17
SICHUAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For the current problem of manganese carbonate leaching, the purpose of this invention is to find a method for leaching manganese carbonate with high leaching rate, fast leaching speed, low energy consumption, and no increase in the burden of subsequent processes. Add the powder into a pressure-resistant, sulfuric acid-resistant reaction kettle with no less than two air inlets, and add sulfuric acid solution under the condition that the reactor exhaust port is open and the air inlet is closed for the first stage of leaching. produced CO 2 Exhaust from the exhaust port

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: 1000g manganese carbonate ore powder (containing divalent manganese 25.2%, tetravalent manganese 3.1%, Fe 2 o 3 10.7%, particle size 180 mesh) into a titanium-lined pressure reactor with a volume of 5L, add 2576ml of 2.0mol / L sulfuric acid solution under the condition that the exhaust valve is open and the intake valve is closed, and stirred at 60-70°C (stirring speed 80r / min) leaching for 1h. Then close the exhaust valve and open the SO 2 Intake valve into SO 2 Continue leaching for 1.5h (SO 2 The feeding amount is about 36.5g, and the relative pressure in the reactor is 0.03MPa). Close SO thereafter 2 Intake valve, and open O 2 Intake valve into O 2 Oxidize the leach solution for 0.5h (the relative pressure in the reactor is 0.3MPa). After the leaching is finished, liquid-solid separation and washing of the leaching residue are carried out. According to the laboratory analysis results of the washed leaching slag, the leaching rate of mangan...

Embodiment 2

[0025] Embodiment 2: 10kg manganese carbonate ore powder (containing divalent manganese 25.2%, tetravalent manganese 3.1%, Fe 2 o 3 10.7%, particle size 180 mesh) was added into a titanium-lined pressure reactor with a volume of 150L, ​​and 117L of 0.446mol / L sulfuric acid solution was added under the condition that the exhaust valve was opened and the intake valve was closed (the sulfuric acid solution was produced by the electrolytic manganese plant Preparation of the electrolytic raffinate, the raffinate contains Mn 2+ 13.5g / L,H 2 SO 4 34.5g / L). Stir at 50-60°C (stirring speed 70r / min) for leaching for 2h. Then close the exhaust valve and open the SO 2 Intake valve into SO 2 Continue leaching for 1 h (SO 2 The feeding amount is about 368g, and the relative pressure in the reactor is 0.01MPa). Close SO thereafter 2 Intake valve, and open O 2 Intake valve into O 2 Oxidize the leaching solution for 1 hour (the relative pressure in the reactor is 0.1MPa). After ...

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Abstract

The invention discloses a method for leaching manganese carbonate ore. The method comprises the steps of adding manganese carbonate ore powder into a reaction kettle which is resistant to pressure and the corrosion of sulfuric acid and is provided with not less than two gas inlets, and adding a sulfuric acid solution to carry out first-stage leaching under the condition that an exhaust opening of the reaction kettle is opened and the gas inlets of the reaction kettle are closed; after the first-stage leaching is ended, closing an exhaust valve, opening a SO2 inlet valve, and introducing SO2 to carry out second-stage reduction leaching; after the reduction leaching is ended, closing the SO2 inlet valve, then, opening an industrial pure oxygen inlet valve, and introducing industrial pure oxygen to oxidize a leachate.

Description

Technical field [0001] The present invention involves a method of immersion in manganese carbonate. Background technique [0002] Manganese carbonate is an important raw material for the production of manganese, manganese sulfate, manganese dioxide, manganese nitrate and other materials.The wet process is the main process of the production of the above materials. This process is an indispensable process.In the wet process of manganese, manganese sulfate, and manganese dioxide, the sulfuric acid immersion system is basically adopted.Since manganese carbonate ore contains a certain MNO 2 , Mno 2 When it is insoluble in sulfuric acid, the target metal manganese immersion rate is not high when using sulfuric acid immersion manganese carbonate ore, causing waste of resources.Although adding Fe in the immersion system 2+ , Glucose and other reducing agents can increase the immersion rate of manganese, but add Fe 2+ It will increase the burden of subsequent solution purification, and th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B47/00C22B3/08
CPCY02P10/20
Inventor 龙炳清李贵林春
Owner SICHUAN NORMAL UNIV
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