Extraction decontamination method for industrial iron slag sulfuric acid leaching

An iron slag sulfuric acid and leaching solution technology, applied in the preparation of nickel sulfate, iron compounds, iron halide and other directions, can solve the problems of high consumption of electrolysis, small solution processing capacity, unsuitable for large-scale production, etc., and achieves high impurity removal rate , the effect of simple process flow

Inactive Publication Date: 2017-09-26
甘肃有色冶金职业技术学院
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The electrolysis method consumes high electric energy, the cathode current efficiency is low, and the solution treatment capacity is small, so it is not suitable for large-scale production; the ion exchange method produces a large amount of washing water, and is not s

Method used

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  • Extraction decontamination method for industrial iron slag sulfuric acid leaching
  • Extraction decontamination method for industrial iron slag sulfuric acid leaching
  • Extraction decontamination method for industrial iron slag sulfuric acid leaching

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Embodiment 1

[0032] A method for extracting and removing impurities from industrial iron slag sulfuric acid leaching solution, comprising the following steps:

[0033] Step 1: Preparation of the pre-extraction solution. During the sulfuric acid leaching reaction of industrial iron slag, the iron slag slurry has a liquid-solid ratio of 4:1, the temperature is 76°C, the sulfuric acid concentration is 80.5g / L, and the reaction is 0.5h; then add iron powder, the amount of iron powder added is the leaching solution Cu 2+ 1 times the concentration, react for 0.5h, then add sodium sulfite, the amount added is Fe in the leaching solution 3+ 1.1 times the concentration, and reacted for 2 hours to obtain a sulfuric acid leaching solution of industrial iron slag with higher impurity content. The components of the industrial iron slag leaching solution used are shown in Table 4.

[0034] Table 4 Composition of industrial iron slag sulfuric acid leaching solution g / L

[0035]

[0036] Step 2: Sodi...

Embodiment 2

[0046] A method for extracting and removing impurities from industrial iron slag sulfuric acid leaching solution, comprising the following steps:

[0047] Step 1: Preparation of the pre-extraction solution. During the leaching reaction, the iron slag slurry has a liquid-solid ratio of 4.5:1. The temperature is 80°C, the concentration of sulfuric acid is 83g / L, and the reaction is 0.5h; then add iron powder, and the amount of iron powder added is the leachate Cu 2+ 1.2 times the concentration, react for 0.5h, then add sodium sulfite, the amount added is the leachate Fe 3+ 1 times the concentration, and reacted for 2 hours to obtain a sulfuric acid leaching solution of industrial iron slag with higher impurity content. The components of the industrial iron slag leaching solution used are shown in Table 7.

[0048] Table 7 Composition of industrial iron slag sulfuric acid leaching solution g / L

[0049]

[0050] Step 2: Sodium soap, using P 507 As the extractant, the preparat...

Embodiment 3

[0060] A method for extracting and removing impurities from industrial iron slag sulfuric acid leaching solution, comprising the following steps:

[0061] Step 1: Prepare the pre-extraction solution. During the leaching reaction, the iron slag slurry has a liquid-solid ratio of 5:1, the temperature is 85°C, the concentration of sulfuric acid is 85g / L, and the reaction is 0.5h; then add iron powder, the amount of iron powder added is the leaching solution Cu 2+ 1.1 times the concentration, react for 0.5h, then add sodium sulfite, the amount added is the leachate Fe 3+ 1.1 times the concentration, and reacted for 2 hours to obtain a sulfuric acid leaching solution of industrial iron slag with higher impurity content. The components of the industrial iron slag leaching solution used are shown in Table 10.

[0062] Table 10 Composition of industrial iron slag sulfuric acid leaching solution g / L

[0063]

[0064] Step 2: Sodium soap, using P 507 As the extractant, the preparat...

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Abstract

The invention discloses an extraction decontamination method for industrial iron slag sulfuric acid leaching. The extraction decontamination method comprises five procedures of sodium saponification, nickel saponification, extraction, washing and back extraction. P507 is adopted as an extraction agent, solvent oil or sulfonated kerosene is adopted as a diluent, on the basis of different combination properties of different metal ion extraction agents and the principle that the combination property of one metal with the extraction agents can be damaged by hydrochloric acid of different concentrations, target metals of Ni and Fe ions can be separated, metal ions such as Co, Cu, Pb, Zn, Ca and Mg in the leaching can be further removed, then the industrial iron slag sulfuric acid leaching can be deeply purified, and a nickel sulfate solution and a ferrous chloride solution with low impurity contents can be prepared. The extraction decontamination method disclosed by the invention is simple and convenient in process procedure and high in impurity removal rate, and the quality of the produced nickel sulfate solution and ferrous chloride solution meets quality requirements for producing nickel sulfate and ferric oxide products.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy, relates to a large amount of industrial iron slag produced in the hydrometallurgy of non-ferrous metals nickel and cobalt, and specifically relates to a method for extracting and removing impurities from sulfuric acid leachate of industrial iron slag. Background technique [0002] A large amount of industrial iron slag is produced in the nickel and cobalt hydrometallurgy process, and the industrial iron slag is stored in the slag yard, which not only occupies the space, but also has the hidden danger of polluting the soil. At the same time, the industrial iron slag is accompanied by a large amount of valuable nickel metal, resulting in a waste of resources. [0003] In order to realize the recycling of resources, it is necessary to carry out technical research on the recycling of industrial iron slag; the best way to extract the valuable metals nickel and iron from solid matter is to leac...

Claims

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Application Information

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IPC IPC(8): C01G53/10C01G49/10
CPCC01G49/0009C01G49/10C01G53/003C01G53/10
Inventor 刘瑜苏瑞娟张仲利
Owner 甘肃有色冶金职业技术学院
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