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Iron-containing solution treatment method

A treatment method and solution technology, applied in the field of metallurgy, can solve problems such as environmental pollution, large amount of slag, and large land occupation

Active Publication Date: 2014-08-20
CHINA ENFI ENGINEERING CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has a large amount of slag after iron removal. At present, the slag cannot be recycled as a resource. It not only occupies a large amount of land for storage, but also causes environmental pollution due to the slow dissolution of harmful components.

Method used

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  • Iron-containing solution treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] refer to figure 2 1L of nickel laterite acid leaching solution was taken, wherein the iron content was 42g / L (ferric iron content was 98%), and the acid content was 50g / L, and sodium hydroxide was added to adjust the pH to 1.2. Put it into an autoclave at a temperature of 200 degrees Celsius, circulate the seed crystal 6 times, filter after reaction, wash with 3 times the weight of water, and finally dry to obtain a precipitate. After analysis, the iron precipitation rate in the solution after acid leaching is 90.6%, and the XRD pattern of the precipitate is shown in image 3 shown by image 3 It can be seen that the phase of the precipitate is a single basic ferric sulfate.

Embodiment 2

[0037] refer to figure 2 , get 1L of zinc leaching solution, wherein iron content is 30g / L (ferric iron content is 98%). Add NaOH to adjust the pH to 1.0, add it into an autoclave at a temperature of 180 degrees Celsius, circulate the seed crystal 4 times, filter after reaction, wash with 3 times the weight of water, and finally dry to obtain a precipitate. After analysis, the iron precipitation rate in the solution after acid leaching was 95.0%, and the phase of the precipitate was single basic ferric sulfate.

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Abstract

The invention provides an iron-containing solution treatment method, comprising the following steps: regulating the pH value of an iron-containing solution to 0.5-1.5; precipitating alkaline ferric sulfate in the iron-containing solution at high temperature of 180-220 DEG C and under high pressure of 1.0MPa to 2.4MPa; filtering the solution which contains the alkaline ferric sulfate precipitate to obtain a filter cake and filtrate; and washing the filter cake so as to obtain an alkaline ferric sulfate product. By adopting the method, the iron removal rate of the iron-containing solution can be increased effectively, and the iron in the iron-containing solution can be transformed into recyclable alkaline ferric sulfate.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular, the invention relates to a treatment method for iron-containing solution. Background technique [0002] At present, when zinc, nickel, cobalt or other valuable metals are produced by wet method, the acid leaching process is usually adopted. When the valuable metals are leached, the iron in the ore is also leached. The subsequent purification process includes the step of iron removal. In the industry, yellow (sodium, ammonium) jarosite or goethite method is usually used to remove iron, that is, the temperature of the leaching solution is controlled at a relatively high level, and sodium / potassium is introduced into the leaching solution. / ammonium ions, and the iron ions in it to synthesize iron vitriol, or reduce the ferric iron in the leaching solution to divalent, and remove the iron as goethite under oxidation conditions. The iron slag after iron removal is sent to the tailings dam fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/44C22B3/08
CPCY02P10/20
Inventor 孙宁磊李斌赵鹏飞聂颖殷书岩戴江洪李少龙陆业大
Owner CHINA ENFI ENGINEERING CORPORATION