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A hot-pressed oxidation leaching system and process

A hot-pressed oxidation and leaching technology, applied in the direction of improving process efficiency, can solve the problems of difficult to achieve selective leaching, high cost of autoclave, large maintenance workload, etc., to reduce equipment maintenance costs, reduce equipment manufacturing costs, The effect of reducing energy consumption

Active Publication Date: 2020-09-08
灵宝灵金科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its sealing, lubrication and other systems must work under high temperature, high pressure, and high corrosion conditions, making it difficult to manufacture
[0006] However, the high cost of autoclave and heavy maintenance workload are the main reasons restricting the application of hot-press leaching.
[0007] At the same time, due to the structure of the reactor, the volume filling rate of the reactor is generally about 70%, and the utilization factor is low.
Due to the use of multiple chambers sharing one kettle, the reaction conditions in the kettle are the same, and it is difficult to achieve selective leaching under different conditions

Method used

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  • A hot-pressed oxidation leaching system and process
  • A hot-pressed oxidation leaching system and process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The chemical composition of gold concentrate from a mine in Gansu is shown in the following table:

[0053] Element Ag(g / t) Au(g / t) As Cu Pb C S content(%) 17.32 32.65 3.72 0.15 0.28 0.13 19.92

[0054] The gold leaching rate of the gold concentrate is 32% by direct cyanidation treatment, the sales price is low, and the economic benefit is poor, so it needs to be pretreated by hot pressing leaching.

[0055] The above-mentioned gold concentrate is processed by the present invention, and compared with the processing of the mechanical stirring high-pressure reaction kettle, and the specific conditions are as follows:

[0056] Step 1. Grinding: firstly grind 1 t of raw material to -0.037mm, accounting for 85% (mass ratio), add water to make ore pulp with a solid-liquid mass ratio of 1:1.5; except for leaving 750ml for step 4, all the steps are given together 2.

[0057] Step 2. Hot-press oxidation: the pulp from step 1 is diluted wit...

Embodiment 2

[0065] The chemical composition of gold concentrate from a mine in Henan is shown in the following table:

[0066] Element Ag(g / t) Au(g / t) As Cu Pb C S content(%) 160.20 54.85 / 0.15 / / 27.52

[0067] The gold leaching rate of the gold concentrate is 95.5% by direct cyanidation treatment, but the leaching time is long, reaching 60h. The use of hot-pressure oxygen leaching can greatly shorten the leaching time.

[0068] The above-mentioned gold concentrate is processed by the present invention, and compared with the processing of the mechanical stirring high-pressure reaction kettle, and the specific conditions are as follows:

[0069] Step 1. Grinding: firstly grind 4t of raw materials to -0.037mm, accounting for 80% (mass ratio), add water to make ore pulp with a solid-liquid mass ratio of 1:1.5; except for leaving 1000ml for step 3, all the steps are given together 2.

[0070] Step 2. Hot pressure oxidation: the pulp from step 1, the ...

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Abstract

The invention discloses a hot-pressing oxidation leaching system and process. A fluidization technology is adopted, mechanical stirring is eliminated, and the manufacturing difficulty and equipment investment of reactors are reduced. Through the combination of the reactors, high-efficiency hot-pressing leaching of minerals is realized. Meanwhile, because moving parts are eliminated, the equipmentmaintenance workload is greatly reduced, the operation rate is greatly improved, and the operation cost of the hot-pressing leaching process is also greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of hot-press leaching, and in particular relates to a hot-press oxidation leaching system and process. Background technique [0002] The most important equipment of the hot-press leaching technology is a high-pressure reactor, and the stirring method usually adopts mechanical stirring. Hot-press leaching is generally carried out in high-acid, high-temperature, and high-pressure pulp, so high requirements are placed on the autoclave, that is, not only high temperature and high pressure resistance, but also corrosion and wear resistance, and the equipment structure has certain particularities. [0003] The structure of the existing high-pressure reactor is generally horizontal, divided into multiple compartments, separated by partitions in the middle, refer to figure 1 , mainly consists of the following parts: vertical stirring device 101, cabin isolation device 102, inspection and maintenance port 103, carbo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/02C22B3/04C22B11/08
CPCC22B3/02C22B3/04C22B11/08Y02P10/20
Inventor 张伟晓
Owner 灵宝灵金科技有限公司
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