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Preparation method and application of Fe < 3 + > precipitant in manganese sulfate solution

A technology of manganese sulfate solution and precipitant, which is applied in the direction of manganese sulfate, electrolytic components, electrolytic process, etc., can solve the problems of high energy consumption, high cost of hematite treatment, difficult to filter and remove, and achieve the effect of less dosage

Pending Publication Date: 2022-06-21
GUANGXI ERAMET COMILOG CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the goethite method is suitable for Fe 3+ Acid leaching medium liquid with content less than 2g / l, easy to form Fe(OH) by oxidative hydrolysis 3 Colloids not only adsorb valuable metals such as manganese, cobalt, and nickel, but are also difficult to remove by filtration. The hematite method is costly and energy-intensive

Method used

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Examples

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Comparison scheme
Effect test

Embodiment 1

[0016] Fe in the manganese sulfate solution of the present invention 3+ An example of the preparation method of precipitant, comprises the following steps:

[0017] At first, amino-o-xylylenediamine with a mass concentration of 30% was added to a sodium hydroxide solution with a mass concentration of 15% under stirring conditions at a mass ratio of 1:3, and the reaction was performed at a temperature of 22-25°C for 2.5 hours to obtain solution 1; Then, carbon disulfide gas was introduced into solution 1 under the condition of 30-35 °C, and after stirring for 35 minutes, the temperature was lowered to 10-12 °C for natural cooling crystallization; White crystals are Fe 3+ Precipitant.

Embodiment 2

[0019] Fe in the manganese sulfate solution of the present invention 3+ Another example of the preparation method of the precipitant, comprising the following steps:

[0020] At first, amino-o-xylylenediamine with a mass concentration of 35% was added to a sodium hydroxide solution with a mass concentration of 20% under stirring conditions at a mass ratio of 1.5:5, and the temperature was controlled at 22 to 25° C. to react for 3 hours to obtain solution 1; Then, carbon disulfide gas was introduced into solution 1 under the condition of 30-35 ℃, and after stirring and reacting for 40 minutes, the temperature was lowered to 10-12 ℃ for natural cooling and crystallization; White crystals are Fe 3+ Precipitant.

Embodiment 3

[0022] This embodiment is Fe in the manganese sulfate solution of the present invention 3+ Fe prepared by the preparation method of precipitant 3+ Application example of precipitant in manganese sulfate solution.

[0023] will contain Ca 2+ 26.15mg / L, Fe 3+ 6.23mg / L, Co 2+ 34.53mg / L, Ni 2+ 18.45mg / L, Mn 2+ 18674.54mg / L of acid leaching manganese sulfate solution was taken 200mL and placed in a 250mL three-necked flask, and 4mL of 10% Fe 3+ precipitating agent, and then put the three-necked flask in a collector-type constant temperature magnetic heating stirrer, heat it to 85°C, adjust the rotation speed to 10 rpm and slowly stir for 10 minutes, then take the supernatant for testing. The results show that the manganese sulfate solution contains Ca 2+ 25.77mg / L, Fe 3+ 0.49mg / L, Co 2+ 33.81mg / L, Ni 2+ 17.67mg / L, Mn 2+ 18425.14mg / L, Fe in manganese sulfate solution 3+ from Fe 3+ 6.23mg / L down to Fe 3+ 0.49mg / L, Fe 3+ The removal rate is 92.13%, effectively removing ...

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Abstract

The invention relates to a preparation method and application of a Fe < 3 + > precipitant in a manganese sulfate solution, and the preparation method comprises the following steps: firstly, adding amino o-xylylenediamine with the mass concentration of 30-35% into a sodium hydroxide solution with the mass concentration of 15-20% in a mass ratio of (1-1.5): (3-5) under a stirring condition, controlling the temperature to be 22-25 DEG C, and reacting for 2.5-3 hours to prepare a solution 1; introducing carbon disulfide gas into the solution 1 under the condition of 30-35 DEG C, stirring for 35-40 minutes, reducing the temperature to 10-12 DEG C, and naturally cooling and crystallizing; and finally, separating by adopting a centrifugal machine at the speed of 3000-3200r / min to obtain scaly white crystals, namely the Fe < 3 + > precipitant.

Description

technical field [0001] The present invention relates to a kind of Fe 3+ The preparation method of the precipitant, especially for the electrolytic manganese oxide enterprise, adopts sulfuric acid leaching in the production process, so that the Fe in the manganese sulfate solution is leached. 3+ High content, need to remove Fe 3+ The preparation method of the precipitant and its application. Background technique [0002] In recent years, many electrolytic manganese oxidation enterprises use pyrolusite to produce electrolytic manganese oxide products. After pyrolusite is leached by sulfuric acid, the impurity elements such as Ca, Fe, Co, Ni in the original ore are leached together with Mn into the manganese sulfate solution, while Ca 2+ , Fe 3 + , Co 2+ , Ni 2+ The existence of such things will lead to the decrease of current efficiency and the low quality of electrolytic manganese oxide during subsequent electrolysis of manganese oxide. Therefore, for Ca in manganese s...

Claims

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Application Information

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IPC IPC(8): C01G45/10C25B1/21
CPCC01G45/10C25B1/21C01P2006/80
Inventor 陈昌李铁晶贺钢李国新魏宗武刘海燕沈芳方海嫣魏雪艳王臣
Owner GUANGXI ERAMET COMILOG CHEM
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