Method for increasing leaching rate of copper in difficult-to-treat mineral

A difficult-to-handle and leaching rate technology, applied in the fields of acid leaching copper extraction and mineral roasting, can solve the problem of low copper recovery rate, and achieve the effect of significant economic benefits, simple process, and expanded processing adaptability.

Active Publication Date: 2014-12-10
SHANDONG GUODA GOLD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method for improving the leaching rate of copper in refractory minerals, and overcome the defects of low copper recovery rate in existing methods

Method used

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  • Method for increasing leaching rate of copper in difficult-to-treat mineral
  • Method for increasing leaching rate of copper in difficult-to-treat mineral
  • Method for increasing leaching rate of copper in difficult-to-treat mineral

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Ore blending: According to the fineness and content analysis of refractory minerals such as copper, arsenic, and sulfur entering the plant, the ore blending is organized in the stockyard, so that the ore pulp contains 25% sulfur and 10% arsenic, and water and additives are added. Adjust the pulp concentration to 65%;

[0022] The additives added are sodium thiosulfate and manganese dioxide, the mixing mass ratio is 1:1, and the addition amount is 5%.

[0023] (2) Roasting: Spray the evenly stirred ore slurry into the roasting furnace with a spray gun. The roasting temperature is controlled at 580°C. Dust-containing flue gas is discharged through the top of the furnace and enters the secondary cooling dust collector. The first and second cooling dust collection The flue gas of the device passes through the bag filter to recover arsenic trioxide, and then produces 15% dilute sulfuric acid through wet dust collection, and the rest of the flue gas enters the acid system...

Embodiment 2

[0035] (1) Ore blending: According to the detection of fineness and content analysis of refractory minerals such as copper, arsenic, and sulfur entering the plant, the ore blending in the stockyard is organized so that the ore pulp contains 26% sulfur and 8% arsenic, and water and additives are added. Adjust the slurry concentration to 68%;

[0036] The additives added are sodium thiosulfate and manganese dioxide, the mixing mass ratio is 1:1, and the addition amount is 3%.

[0037] (2) Roasting: Spray the evenly stirred ore slurry into the roasting furnace with a spray gun. The roasting temperature is controlled at 590°C. Dust-containing flue gas is discharged through the top of the furnace and enters the secondary cooling dust collector. The first and second cooling dust collection The flue gas of the device passes through the bag filter to recover arsenic trioxide, and then produces 14% dilute sulfuric acid through wet dust collection, and the rest of the flue gas enters th...

Embodiment 3

[0049] (1) Ore blending: According to the fineness and content analysis of refractory minerals such as copper, arsenic, and sulfur entering the plant, the ore blending is organized in the stockyard, so that the ore pulp contains 27% sulfur and 9% arsenic, and water and additives are added. Adjust the pulp concentration to 65%;

[0050] The additives added are sodium thiosulfate and manganese dioxide, the mixing mass ratio is 1:1, and the addition amount is 1%.

[0051] (2) Roasting: Spray the evenly stirred ore slurry into the roasting furnace with a spray gun. The roasting temperature is controlled at 600°C. Dust-containing flue gas is discharged through the top of the furnace and enters the secondary cooling dust collector. The first and second cooling dust collection The flue gas of the device passes through the bag filter to recover arsenic trioxide, and then produces 13% dilute sulfuric acid through wet dust collection, and the rest of the flue gas enters the acid system ...

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Abstract

The invention relates to a method for increasing a leaching rate of copper in a difficult-to-treat mineral. The method comprises the steps that the mineral is subjected to ore blending to allow the mineral to comprise 20-25% of sulfur and 6-10% of arsenic; water and an additive are added; the density of ore pulp is adjusted to be 65-70%; the ore pulp is put in a roasting furnace; exhausted ash-laden gas is subjected to arsenic trioxide recovery by an arsenic cloth bag collection device, and then subjected to wet dust collection to produce 5-15% dilute sulfuric acid; the rest ash-laden gas enters an acid making system to produce 98% sulfuric acid; a roasted product generated after roasting of the ore slurry is mixed with 5-15% dilute sulfuric acid produced by the wet dust collection; manganese dioxide and potassium permanganate are added; and copper in the mineral is leached and recovered by an acid leaching technology. The method overcomes the defect that the existing method is low in copper recovery rate; a recovery rate of copper in the complicated mineral containing copper, arsenic, sulfur and the like is increased by a production practice; and a significant economic benefit is achieved.

Description

technical field [0001] The invention relates to a method for increasing the leaching rate of copper in refractory minerals, and belongs to the technical field of mineral roasting and acid leaching copper extraction. Background technique [0002] At present, polymetallic minerals containing copper, arsenic, sulfur, etc. are complex minerals that are difficult to process in the field of metallurgy. There are usually two processes for extracting copper in minerals: pyrometallurgy and hydrometallurgy. Which method to use depends on the ore. The chemical composition and mineral composition of the ore, the copper content in the ore, the local conditions (the price of fuel, water, electricity, refractory materials, etc.) and other factors. [0003] At present, pyrometallurgy is mainly used for copper sulfide minerals. This method has relatively strong adaptability, but there are problems such as high cost and large environmental pollution; [0004] Hydrometallurgy is developed fro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B15/00C22B1/06C22B3/08
CPCY02P10/20
Inventor 吕寿明梁志伟李腾山郭建东
Owner SHANDONG GUODA GOLD
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