Method for comprehensively utilizing high-iron biological copper leaching liquid

A bioleaching and biological technology, applied in the direction of improving process efficiency, can solve the problem that copper cannot be recycled, and achieve the effect of saving water resources

Inactive Publication Date: 2010-06-16
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lime neutralization precipitation method requires aeration, multi-stage oxidation precipitation, and copper cannot be recycled

Method used

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  • Method for comprehensively utilizing high-iron biological copper leaching liquid
  • Method for comprehensively utilizing high-iron biological copper leaching liquid
  • Method for comprehensively utilizing high-iron biological copper leaching liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Add 2L of biological immersion copper solution into a 2L three-necked bottle, start stirring, heat to 85°C, add 200g of sodium thiosulfate, react for 60min and then filter. The compositions of the bioheap leaching solution and the post-reaction heap leaching solution are shown in Table 1 and Table 2, respectively, and the components of the obtained sediment are shown in Table 3.

[0015] Table 1 Main components of biological copper leaching solution

[0016]

[0017] Table 2 sodium thiosulfate treatment biological leaching copper solution result /

[0018]

[0019] Table 3 Sodium thiosulfate treatment of biological leaching copper solution obtained sediment composition / %

[0020]

Embodiment 2

[0022] Pass hydrogen sulfide into 4L of biological leaching copper solution, stir and react at room temperature for 30min, and then filter to obtain 3.85L of filtrate. The composition of the biological leaching copper solution is shown in Table 4, the composition of the biological leaching copper solution after hydrogen sulfide treatment is shown in Table 5, and the obtained precipitation components are shown in Table 6.

[0023] Table 4 Composition of biological leaching copper solution / g L -1

[0024]

[0025] Table 5 Composition of biological leaching copper solution after hydrogen sulfide treatment / g L -1

[0026]

[0027] It can be seen that the copper precipitation rate is 100%, the iron precipitation rate is 24.4%, the iron reduction rate is 95.2%, and the pH value after the reaction is 0.73.

[0028] Table 6 Hydrogen sulfide treatment obtained precipitation components / %

[0029]

[0030] It can be seen from Table 6 that the precipitates obtained after hydr...

Embodiment 3

[0032] 315g sodium sulfide (Na 2 S·9H 2 O) adding 4L of the above-mentioned biological immersion copper solution, stirring and reacting at room temperature for 30min and then filtering. The components of the biological copper leaching solution after sodium sulfide treatment are shown in Table 7, and the components of the obtained precipitate are shown in Table 8.

[0033] Table 7 Sodium sulfide treatment results of biological leaching copper solution / g L -1

[0034]

[0035] Table 8 Sodium sulfide treatment of biological leaching copper solution obtained precipitation components / %

[0036]

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Abstract

The invention relates to a method for comprehensively utilizing high-iron biological copper leaching liquid. The method comprises the following steps: adding hyposulphite, sulfide or hyposulphite and sulfide into ferriporphyrin biological copper leaching liquid; filtering to acquire copper sulfide sediment after full reaction and precipitation; returning filtrate for bioleaching, or adding alkali into the filtrate to regulate a pH value of between 2 and 10; introducing air or oxygen gas, stirring for reaction, and filtering to obtain iron-removed filtrate and scruff; and returning the filtrate for bioleaching. The copper sulfide sediment is used to reclaim Cu in the bioleaching liquid; Fe3+ is reduced or iron is removed in the leaching liquid and the iron is reclaimed; and water resource is saved, and acid in the leaching liquid is utilized so as to recycle the bioleaching liquid.

Description

Technical field: [0001] The invention relates to a technology for comprehensive utilization of high-iron biological copper leaching liquid, which realizes comprehensive utilization of high-iron biological copper leaching liquid. Background technique: [0002] With the continuous development and utilization of non-renewable mineral resources, ore resources are becoming increasingly impoverished. Lean ore, off-surface ore, refractory ore and residual ore after mining are too much, which makes the conventional dressing and smelting method face severe challenges in technology and economy, and the environmental pollution is also becoming more and more serious. [0003] Low-grade copper ore includes copper resources such as refractory low-grade copper oxide ore, mixed oxide-sulfide ore, low-grade copper sulfide ore, and copper-bearing waste rock, which are difficult to economically process and recover by traditional dressing and smelting processes. The microbial leaching technolo...

Claims

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Application Information

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IPC IPC(8): C22B3/18
CPCY02P10/20
Inventor 郑雅杰彭丽婧乐红春
Owner CENT SOUTH UNIV
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