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Method for synergistic extraction of iron in high-sulphur and high-arsenic gold concentrate leaching solution

A leachate and gold concentrate technology, which is applied in the field of iron preparation in the leachate of high-sulfur and high-arsenic gold concentrate, can solve the problems of low extraction rate, difficult back-extraction, high acidity, etc., to achieve improved purity, simple and fast preparation method, and environmental friendliness Effect

Inactive Publication Date: 2009-07-08
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both TBP and MIBK are neutral complexing extractants, and the data show that under a given acidity condition, MIBK has a 3+ The extraction rate is lower than that of TBP (tributyl phosphate)
At the same time, because MIBK has the disadvantages of low flash point, high evaporation pressure, easily soluble in water phase, suitable for low concentration iron solution and high acidity (>6mol / L), on the other hand, TBP has the disadvantages of easy generation of third phase and difficult stripping, etc. Disadvantages [J. Saji, M.L.P. Reddy. Hydrometallurgy, 61 (2001): 81-87]

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] After the gold concentrate is mechanically pulverized by a pulverizer, it is passed through a 100-mesh sieve by a vibrating sieve to obtain a powdery sample. Under the conditions of raw material ratio (mass ratio of nitric acid and gold concentrate): 1:1, initial concentration of nitric acid: 30%, initial oxidation temperature: 80°C, stirring speed: 1000r / min, the sample was dissolved and oxidized to prepare nitric acid Add 6.14mol / L hydrochloric acid as the raw material for extracting iron in the leach solution, adjust the feed solution to contain iron ions 18.09g / L, the organic phase composition TBP:MIBK=7:3, control the water bath constant temperature oscillator under the condition of 1:1 The temperature is room temperature for extraction, the extraction rate of iron reaches 99.32%, and the iron content in the raffinate is lower than 0.1g / L. Back-extraction with distilled water, the organic phase containing iron 17.97g / L when the ratio is 1:2, the iron is basically b...

Embodiment 2

[0020] After the gold concentrate is mechanically pulverized by a pulverizer, it is passed through a 100-mesh sieve by a vibrating sieve to obtain a powdery sample. Under the conditions of raw material ratio (mass ratio of nitric acid and gold concentrate): 1:1; initial concentration of nitric acid: 30%; initial oxidation temperature: 80°C, stirring speed: 1000r / min, the sample was dissolved and oxidized to prepare nitric acid Add 6.14mol / L hydrochloric acid as the raw material for extracting iron in the leach solution, adjust the feed solution to contain iron ions 18.09g / L, organic phase composition TBP:MIBK=10:1, control the water bath constant temperature oscillator under the condition of 1:1 The temperature is room temperature for extraction, the extraction rate of iron reaches 85.32%, and the iron content in the raffinate is lower than 5.0g / L. Back-extraction with distilled water, the organic phase containing iron 17.97g / L when the ratio is 1:2, the iron is basically back...

Embodiment 3

[0022] After the gold concentrate is mechanically pulverized by a pulverizer, it is passed through a 100-mesh sieve by a vibrating sieve to obtain a powdery sample. Under the conditions of raw material ratio (mass ratio of nitric acid and gold concentrate): 1:1; initial concentration of nitric acid: 30%; initial oxidation temperature: 80°C, stirring speed: 1000r / min, the sample was dissolved and oxidized to prepare nitric acid Add 6.14mol / L hydrochloric acid as raw material for extracting iron in the leach solution, adjust the feed solution to contain iron ions 18.09g / L, organic phase composition TBP:MIBK=1:1, control the water bath constant temperature oscillator under the condition of 1:1 The temperature is room temperature for extraction, the extraction rate of iron reaches 90.1%, and the iron content in the raffinate is lower than 2.0g / L. Back-extraction with distilled water, the organic phase containing iron 17.97g / L when the ratio is 1:2, the iron is basically back-extra...

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Abstract

The invention relates to a method of synergistic extraction of iron from a high-sulfur high-arsenic gold mine leaching liquid.The method comprises steps of mechanical-pulverizing gold mine by using a pulverizer and screening the pulverized gold mine through 100 meshes by using a sieve shaker to obtain a powdery sample; mixing hydrogen nitrate and the sample by a mass ratio of 1:1 and performing dissolution and oxidization to prepare a hydrogen nitrate leaching liquid; adjusting the iron content in the leaching liquid to 18.09g / L by using hydrochloric acid, and the adjusted liquid is used as raw materials for iron extraction; in a water-bath constant-temperature oscillator, pouring the organic phase and the raw materials for iron extraction with a phase ratio of 1:1 into a pear-shaped separatory funnel, oscillating, mixing, standing and separating, and the organic phase consisting of tri-butyl-phosphate and hexone with a ratio of 10-1:3; after the liquid separating, putting the organic phase containing Fe of 17.97 g / L and distilled water with a phase ratio of 1:2 into the water-bath constant-temperature oscillator for back extraction, therefore, iron can be obtained.The preparation method of the invention has characteristics of simple, quick, environment-friendly and improved purity degree of iron ion solution, therefore, a material for preparing high purity iron can be obtained.

Description

technical field [0001] The invention belongs to the field of preparation of iron in the leach solution of high-sulfur and high-arsenic gold concentrate, and in particular relates to a method for synergistically extracting iron in the leach solution of high-sulfur and high-arsenic gold concentrate. Background technique [0002] The fine-grained gold in the refractory gold concentrate is tightly wrapped by arsenic compounds and iron sulfide, and the existing gold extraction technology is used for the characteristics of low recovery rate of gold extraction from high-sulfur and high-arsenic refractory gold ores. Catalytic oxidation refractory gold concentrate technology: after nitric acid oxidizes tailings, pyrite is oxidized to ferric sulfate and sulfur, and oxidizes and removes the sulfides wrapped in gold in cyanidation tailings of gold smelting, increasing the contact between gold and leaching agent Opportunity, the oxidation slag is used to extract gold and silver, the tail...

Claims

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Application Information

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IPC IPC(8): C22B3/40C22B3/06
CPCY02P10/20
Inventor 李登新周勇
Owner DONGHUA UNIV
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