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Leaching method of metals in lead-zinc sulfide mineral tailings and application of leaching method

A sulfide ore and leaching technology, applied in the direction of improving process efficiency, etc., can solve the problems of inability to realize full recovery of metals, low lead leaching rate, waste of resources, etc., to achieve waste of resources, less loss of valuable metals, and full recovery Effect

Inactive Publication Date: 2017-02-22
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a method for leaching metals in lead-zinc sulfide ore tailings and its application, which is used to solve the problem that in the existing biological leaching technology, the tailings treatment method has a low lead leaching rate and cannot realize the leaching of metals in tailings. Technical Defects of Total Metal Recycling
It realizes the full recovery of metals in the tailings, and at the same time, the treated tailings can be used in building materials and other fields, which solves the problem of waste of resources

Method used

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  • Leaching method of metals in lead-zinc sulfide mineral tailings and application of leaching method

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Embodiment 1

[0025] This embodiment is a specific embodiment of recovering lead and zinc in the tailings according to a method for leaching metals in the tailings of lead-zinc sulfide mines provided by the present invention. After testing, in this embodiment, the lead content in the lead-zinc sulfide tailings used is 4381 mg / kg, and the zinc content in the lead-zinc sulfide tailings used is 5467 mg / kg.

[0026] At room temperature, soak 0.005kg of lead-zinc sulfide ore tailings in 0.1L of bioleaching solution 1, and stir at 100rpm for 50 days. In this example, the pH of the bioleaching solution 1 used was adjusted to 1.5 with a sulfuric acid solution, and the active ingredient of the bioleaching solution 1 was Thiobacillus ferrooxidans. After soaking, the solid-liquid separation is carried out by suction filtration, and the filter residue is collected. The filter residue is pickled with dilute sulfuric acid with a pH of 2, and then dried to obtain the first product 1. The filtrate obtaine...

Embodiment 2

[0030] This embodiment is a specific embodiment of recovering lead and zinc in the tailings according to a method for leaching metals in the tailings of lead-zinc sulfide mines provided by the present invention. After testing, in this embodiment, the lead content in the lead-zinc sulfide tailings used is 4381 mg / kg, and the zinc content in the lead-zinc sulfide tailings used is 5467 mg / kg.

[0031] At room temperature, soak 0.10 kg of lead-zinc sulfide ore tailings in 1 L of bioleaching solution 2, and stir at a speed of 160 rpm for 20 days. In this embodiment, the pH of the bioleach solution 2 used is adjusted to 2 with a sulfuric acid solution, and the active ingredient of the bioleach solution 2 is Thiobacillus ferrooxidans. After soaking, natural sedimentation was used for solid-liquid separation, and after sedimentation for 30 minutes, the filter residue was collected, and the filter residue was acid-washed with dilute sulfuric acid with a pH of 2, and then dried to obtai...

Embodiment 3

[0035] This embodiment is a specific embodiment of recovering lead and zinc in the tailings according to a method for leaching metals in the tailings of lead-zinc sulfide mines provided by the present invention. After testing, in this embodiment, the lead content in the lead-zinc sulfide tailings used is 4381 mg / kg, and the zinc content in the lead-zinc sulfide tailings used is 5467 mg / kg.

[0036] At room temperature, soak 0.4kg of lead-zinc sulfide ore tailings in 2L of bioleaching solution 3, and stir at 200rpm for 40 days. In this embodiment, the pH of the bioleach solution 3 used is adjusted to 3 with a sulfuric acid solution, and the active ingredient of the bioleach solution 3 is Thiobacillus ferrooxidans. After soaking, natural sedimentation was used for solid-liquid separation, and after sedimentation for 120 minutes, the filter residue was collected, and the filter residue was acid-washed with dilute sulfuric acid with a pH of 2, and then dried to obtain the first pr...

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Abstract

The invention belongs to the field of exploitation of mineral resources, and particularly relates to a leaching method of metals in lead-zinc sulfide mineral tailings and application of the leaching method. The leaching method of the metals in the lead-zinc sulfide mineral tailings comprises the steps of biological leaching and sodium chloride leaching. The invention further provides application of the leaching method to recycling plumbum in the sulfide mineral tailings. In conclusion, according to the technical scheme, in the process of biological leaching, the leached plumbum can react with sulfate radicals to form a sediment, and plumbum recycling can be achieved through the leaching effect of sodium chloride. The plumbum in the lead-zinc sulfide mineral tailings can be efficiently leached out through the two-step method, the loss of valuable metal is less, total recycling of the metals in the tailings can be achieved, and the method has a very high popularization value. The technical defects that in the prior art, a method for treating plumbum-containing sulfide mineral tailings is low in plumbum leaching rate and can not achieve total recycling of the metals in the tailings are solved. Meanwhile, the treated tailings can be applied to building materials and other fields, and the problem of resource waste is solved.

Description

technical field [0001] The invention belongs to the field of mineral resource development, in particular to a method for leaching metals in lead-zinc sulfide ore tailings and an application thereof. Background technique [0002] With the continuous consumption and mining of mineral resources, a large amount of tailings are produced, which contain a large amount of rare metals and non-ferrous metals. During the oxidation process of sulfide ore tailings, a large amount of acid will be generated, and a large amount of heavy metal elements may be released. , thus causing serious pollution to the surrounding environment, so the comprehensive utilization of tailings has become more and more important. Bioleaching is a tailings treatment method with low energy consumption and environmental friendliness, which can treat complex polymetallic minerals. At present, bioleaching technology has been applied to low-grade sulfide ores, and can achieve good metal recovery results. [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/18C22B3/04C22B19/20C22B13/00
CPCC22B3/04C22B3/18C22B13/04C22B19/20Y02P10/20
Inventor 孙水裕叶茂友李国健张斯玮郑莉黄绍松
Owner GUANGDONG UNIV OF TECH