Method for synergistically strengthening sulfuric acid leaching of chalcopyrite

A chalcopyrite and leaching technology, applied in the field of hydrometallurgy, can solve the problems of limited improvement of surfactants, and achieve the effects of low price, elimination of passivation, and strong application prospects

Active Publication Date: 2022-04-22
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the improvement of the leaching rate of chalcopyrite by surfactants is very limited

Method used

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  • Method for synergistically strengthening sulfuric acid leaching of chalcopyrite
  • Method for synergistically strengthening sulfuric acid leaching of chalcopyrite
  • Method for synergistically strengthening sulfuric acid leaching of chalcopyrite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] In the present embodiment, the method for synergistically strengthening sulfuric acid leaching of chalcopyrite is carried out according to the following steps:

[0047] (1) Pyrite-type chalcopyrite is crushed and ground to -0.045mm as a leaching ore sample;

[0048] (2) Take 1g of ore sample in a 150mL Erlenmeyer flask, add 100mL Fe-free 2+ solution, followed by the addition of 0.5mol / L NH 4 Cl and 60mg / L CPB were placed in a conical flask, and the initial pH of the leachate was adjusted to 2.0 with a concentration of 5mol / L dilute sulfuric acid;

[0049] (3) Place the above leaching system in an air bath constant temperature oscillator at 30°C and 160r / min for shake flask leaching for 15 days, take samples regularly every 3 days and centrifuge to remove precipitated substances, then take the supernatant to detect the content of copper ions , replenish the evaporated water with deionized water, and supplement the amount of liquid consumed by the test with the correspo...

Embodiment 2

[0055] In the present embodiment, the method for synergistically strengthening sulfuric acid leaching of chalcopyrite is carried out according to the following steps:

[0056] (1) Crushing and grinding the pyrite-type chalcopyrite to -0.038mm or -0.045mm particle size level as a leaching ore sample;

[0057] (2) Take 1g of ore samples with particle size of -0.038mm in a 150mL Erlenmeyer flask, add 100mL deionized water, and then add 0.5mol / L NH 4 Cl, 120mg / L CPB and 0.5mol / L NH 4 Cl+120mg / L CPB, using dilute sulfuric acid with a concentration of 5mol / L to adjust the initial pH of the leaching solution to 1.5, and finally place the above leaching system in an air bath constant temperature oscillator at 50°C and 200r / min for shake flask leaching for 10 days;

[0058] (3) Taking NaCl and KCl two common chloride salts reported in the literature as a control, take 1g of ore samples with a particle size of -0.045mm in a 150mL conical flask, add 4.5g / L Fe 2+ As an oxidizing agent, ...

Embodiment 3

[0063] In the present embodiment, the method for synergistically strengthening sulfuric acid leaching of chalcopyrite is carried out according to the following steps:

[0064] (1) Porphyry-type chalcopyrite is crushed and ground to -0.045mm as a leached ore sample;

[0065] (2) Take 1g of ore sample in a 150mL Erlenmeyer flask, add 100mL Fe-free 2+ or 4.5g / L Fe 2+ solution, followed by adding 1mol / L NH 4 Cl and 30mg / L CPB were placed in a conical flask, and the initial pH of the leachate was adjusted to 2.0 with a concentration of 5mol / L dilute sulfuric acid;

[0066] (3) Anionic surfactant - sodium dodecyl sulfonate (SDS) and non-ionic Tween surfactant - polyoxyethylene sorbitan monolaurate (Tween20) two surfaces The active agent is used as a reference, and under the condition that the dosage is 30mg / L, in the absence of Fe 2+ In the sulfuric acid leaching system, with 1mol / L NH 4 Cl combination, to investigate the effect of different combinations of additives on the lea...

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Abstract

The invention relates to the technical field of hydrometallurgy, and provides a method for synergistically strengthening sulfuric acid leaching of chalcopyrite, which comprises the following steps: S1, crushing and grinding chalcopyrite ore blocks to obtain a leached ore sample; s2, a 0-9 g/L Fe < 2 + > solution is added into the leached ore sample, then 0.1-1 mol/L NH4Cl and 10-120 mg/L cetylpyridinium bromide (a pyridine heterocyclic quaternary ammonium salt type cationic surfactant) are added, and the initial pH of a leaching solution is adjusted to be 1.5-3.5 with dilute sulphuric acid; and S3, under the conditions of a certain temperature and a certain rotating speed, the leachate is placed in an oscillator to be oscillated and leached for 10-15 days. By adding NH4Cl and cetylpyridinium bromide, the leaching amount of the copper ions in the chalcopyrite is increased by 0.63-2.75 times, the leaching rate of the chalcopyrite can be remarkably increased, and the method has important significance on development and utilization of low-grade chalcopyrite resources.

Description

technical field [0001] The invention relates to the technical field of hydrometallurgy, in particular to a method for synergistically strengthening sulfuric acid leaching of chalcopyrite. Background technique [0002] About 70% of copper in nature exists in chalcopyrite. With the continuous mining of high-grade copper resources, copper resources tend to be depleted and their grades are declining. The traditional pyrometallurgy technology not only cannot economically and effectively recover low-grade copper ore resources, but also produces a large amount of SO during the smelting process. 2 gas, causing serious environmental pollution. Relatively speaking, the wet copper smelting technology has the advantages of low cost, less pollution, and high resource utilization, and has a good application prospect. Sulfuric acid is the most commonly used leaching medium in hydrometallurgical technology. However, due to the high lattice energy of chalcopyrite, stable structure and dif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/08C22B15/00
CPCC22B3/08C22B15/0071Y02P10/20
Inventor 张瑞洋毛宇宇张学进王培龙
Owner UNIV OF SCI & TECH BEIJING
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