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Preoxidation treating method for leaching arsenic golden ores by using drum type reactor organisms

A pre-oxidation treatment and bioleaching technology, applied in the direction of improving process efficiency, can solve the problems of harsh pulp concentration, pH and temperature control conditions, unsatisfactory oxidation effect, high mass transfer and low shear, etc., to achieve dissolved oxygen supply. Fully, improve the leaching effect, the effect of uniform gas-liquid distribution

Inactive Publication Date: 2010-12-01
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the disadvantages of this process are that the pulp concentration, pH and temperature control conditions are relatively strict; the oxidation speed is slow, the process time is long, and the oxidation effect is not ideal.
[0006] The fundamental problem of traditional bioleaching reactors is the contradiction between high mass transfer and low shear

Method used

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  • Preoxidation treating method for leaching arsenic golden ores by using drum type reactor organisms
  • Preoxidation treating method for leaching arsenic golden ores by using drum type reactor organisms
  • Preoxidation treating method for leaching arsenic golden ores by using drum type reactor organisms

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Example 1 Using a drum reactor to bioleach simulated systems with different pulp concentrations

[0039] Use alumina inert particles to simulate minerals, and change the particle concentration (particle collision frequency) in the reactor by adding different amounts of alumina particles in the drum bioreactor to induce mixed bacteria to oxidize Fe 2+ The process represents the effect of different particle concentrations on the oxidation activity of leaching microorganisms. During the controlled leaching process, the rotational speed of the drum bioreactor was 3.33r / min, and the ventilation rate was 6L / min. The inoculation amount is 3% of the liquid volume, and the reaction temperature is 30°C. At various solid particle concentrations, Fe in the drum bioreactor 2+ The oxidation process showed the same characteristics, that is, in the first 8h Fe 2+ The concentration did not decrease basically, and the effect of the lag period in the corresponding bacterial growth proc...

Embodiment 2

[0040] Embodiment 2 adopts the pre-oxidation treatment method of arsenic-containing gold ore bioleaching by drum reactor

[0041] The bioleaching experiment of arsenic-containing gold ore was carried out in a drum bioreactor to examine the performance of the drum reactor in the actual bioleaching process. Fe was not added to the seed solution 2+ And add ore sample as the energy source of microbial growth, the inoculum size is 10% of the liquid volume. Temperature, rotating speed and ventilation rate are with embodiment (1). Harmful substances released during bioleaching, such as arsenic oxidation products, may inhibit the activity of leaching microorganisms. In order to avoid the influence of the above factors, keep the mineral concentration consistent, and change the total solid particle concentration in the reactor by adding different concentrations of alumina particles. During the bioleaching process of arsenic-containing gold ore in a drum bioreactor, the total iron con...

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Abstract

The invention relates to a preoxidation treating method for leaching arsenic golden ores by using drum type reactor organisms. The method comprises the following steps of: (1) rinsing arsenic golden concentrate ores; (2) filtering, drying, grinding, activating and acid presoaking the rinsed arsenic golden concentrate ores; (3) acclimating and culturing the induced bacteria of acidithiobacillus ferrooxidans and acidithiobacillus thiooxidans, and amplifying and culturing to prepare induced mixing bacteria; (4) inoculating the induced mixed bacteria into the drum type reactor to leach the organisms of high-concentration arsenic golden ores; and (5) cyanizing and extracting golden from the arsenic golden ores leached residues. The drum type reactor comprises a gas distributor, wherein the gas distributor comprises a gas inlet pipe, a gas guide branch pipe, a gas distributing pipe and a gas outlet pipe. The gas distributor realizes the gas predispersing and sufficient gas and liquid contact and mixing, and promotes the sufficient gas and liquid mass transfer and dissolved oxygen supply. The invention fundamentally solves the problems of high mass transfer rate and low shearing in high ore slurry concentration, and realizes the high-efficiency biology preoxidation of arsenic golden ores.

Description

technical field [0001] The present invention relates to a biological oxidation treatment method for arsenic-containing gold ore, specifically, the present invention relates to a pre-oxidation treatment method for bioleaching high-concentration arsenic-containing gold ore using a drum reactor. A pre-oxidation treatment method for reactor leaching of arsenic-containing gold ore. Background technique [0002] Arsenic-containing gold ore is a typical refractory gold ore. It is directly treated by traditional cyanidation method, and the gold leaching rate is very low. The treatment process is different from conventional gold ore. It is necessary to add a pretreatment process before cyanidation. Its purpose is to oxidize and decompose gold-bearing minerals such as pyrite, arsenopyrite and other metal sulfides, and separate the oxidized sulfur, arsenic, etc. Elements that hinder cyanidation enable the conventional cyanidation method to obtain quite ideal indicators. [0003] At p...

Claims

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Application Information

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IPC IPC(8): C22B3/18C22B3/02C22B11/00
CPCY02P10/20
Inventor 石绍渊丛威刘国梁金建温树梅伍志春
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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