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Device for removing iron from iron-containing solution of hydrometallurgy

A hydrometallurgical and solution technology, applied in the direction of improving process efficiency, can solve the problems of large consumption of reducing agent and oxidant, and achieve the effect of easy solid-liquid separation, improving recovery rate and reducing entrainment

Inactive Publication Date: 2018-03-30
CHINA ENFI ENGINEERING CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to provide a device for removing iron in iron-containing solution by hydrometallurgy, so as to solve the technical problem of consuming a large amount of reducing agent and oxidizing agent in the prior art

Method used

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  • Device for removing iron from iron-containing solution of hydrometallurgy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] use as figure 1 For the device shown, the concentration of ferric iron in the reactor is lower than 1g / L, and the pH of the solution in the reactor is controlled at 15g / L of ferric iron in the iron-containing solution after pressurized oxidation of a gold pressurized pre-oxidation project. =3~4, temperature 70°C, sulfuric acid 10g / L, using 4 goethite iron removal tanks (reactors), reaction time 2 hours, the concentration of ferric iron in the solution after iron removal is about 0.07g / L, except The iron rate is about 99%, and the underflow concentration of the thickener is 40%.

Embodiment 2

[0030] use as figure 1 For the device shown, a certain project contains 11g / L of ferric iron in copper solution, the concentration of ferric iron in the reactor is controlled to be lower than 1g / L, and the pH of the solution in the reactor is controlled to be 3~4, the temperature is 80°C, sulfuric acid 5g / L, using 3 goethite iron removal tanks (reactors), the reaction time is 1.5 hours, the concentration of ferric iron in the solution after iron removal is about 0.05g / L, the iron removal rate is about 99%, and the underflow concentration of the thickener 36%.

Embodiment 3

[0032] use as figure 1 For the device shown in the laboratory, for a certain iron-containing solution 6g / L, the concentration of ferric iron in the reactor is controlled to be lower than 1g / L, and the pH of the solution in the reactor is controlled to be 3-4, the temperature is 65°C, sulfuric acid 2g / L, using goethite iron removal tank (reactor), the reaction time is 2.5 hours, the concentration of ferric iron in the solution after iron removal is about 0.3g / L, the iron removal rate is about 95%, the bottom flow of the solid-liquid separation thickener Concentration 35%.

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Abstract

The invention discloses a device for removing iron from an iron-containing solution of hydrometallurgy. The device comprises a first homogenizing distributing device, a reactor and a thickener, wherein the first homogenizing distributing device is used for adding the iron-containing solution of hydrometallurgy to the reactor; the reactor is used for reacting iron in the iron-containing solution ofhydrometallurgy so as to generate goethite; and the thickener is used for removing the goethite generated in the reactor through solid-liquid separation. By applying the technical scheme of the device, the iron-containing solution of hydrometallurgy is added to the reactor by the homogenizing distributing device, so that the solution can be directly neutralized so as to convert ferric iron into goethite deposit, a large amount of reductant and oxidant does not need to be added for ferric iron-ferrous iron-ferric iron conversion like the prior art, and seed crystal return is not needed, so that the operating cost is reduced.

Description

technical field [0001] The invention relates to the technical field of metal smelting, in particular to a device for removing iron in a hydrometallurgy iron-containing solution. Background technique [0002] Iron is usually an impurity element in the hydrometallurgy process and needs to be removed. When the iron in the solution is trivalent iron, the method of direct neutralization and hydrolysis precipitation is mainly used at present, but the main product of this method is ferric hydroxide, which is in the form of colloid, and it is difficult to separate solid and liquid. If a thickener is used for precipitation , the underflow concentration is usually less than 20%, and the underflow pulp will entrain a large amount of water, which requires further treatment. Or as described in patent CN 102010994A and patent CN 103468951A, first add a reducing agent to reduce ferric iron to ferrous iron, and then pass oxygen or hydrogen peroxide as an oxidant to slowly oxidize ferrous i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/44C22B3/02
CPCC22B3/02C22B3/44Y02P10/20
Inventor 殷书岩陆业大赵鹏飞傅建国李少龙李斌秦明晓
Owner CHINA ENFI ENGINEERING CORPORATION