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Vertical cell immobilized reactor for producing ferric irons by biological oxidation

A biological oxidation and reactor technology, applied in the direction of improving process efficiency, can solve the problems of slow oxidation rate of ferrous iron and long leaching time, and achieve the effect of easy suspension and low density

Active Publication Date: 2013-04-24
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

[0009] The purpose of the present invention is to provide a vertical cell immobilization reactor to solve the problems of slow ferrous iron oxidation rate and long leaching time in bioleaching

Method used

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  • Vertical cell immobilized reactor for producing ferric irons by biological oxidation
  • Vertical cell immobilized reactor for producing ferric irons by biological oxidation
  • Vertical cell immobilized reactor for producing ferric irons by biological oxidation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Continuous Oxidation of Fe by Immobilized Moderate Thermophilic Rheobacterium siberia S.s with 1 / 2 Loading Volume 2+ The rate determination of:

[0036] Cut the polyurethane foam into cubes of a certain size and fill them into the reactor cylinder 3 with a filling volume of 1 / 2. Configuration contains 10g / LFe 2+ , 0.2g / L yeast extract powder, leathern medium of 10% S.s bacterial liquid, with 1:1 H 2 SO 4 Adjust the pH to 1.5, use a pump to add the prepared medium into the reactor cylinder 3 through the feed port 7, turn on the air compressor pump, adjust the air rotameter to an appropriate flow rate, and set it between 30 and 100 °C At a good temperature, run the reactor for bacteria immobilization experiments. When the load of bacteria on the carrier is stable, continuous operation is carried out. The pump continuously inputs the culture medium from the feed port 7 into the reactor cylinder 3, and the feed port 11 is at the same time. Drain liquid at the same rate,...

Embodiment 2

[0038] Continuous Oxidation of Fe by Immobilized Moderate Thermophilic Rheobacterium siberia S.s with 3 / 4 Loading Volume 2+ The rate determination of:

[0039]Cut the polyurethane foam into cubes of a certain size and fill them into the reactor cylinder 3 with a filling volume of 3 / 4. Configuration contains 10g / LFe 2+ , 0.2g / L yeast extract powder, leathern medium of 10% S.s bacterial liquid, with 1:1 H 2 SO 4 Adjust the pH to 1.5, use a pump to add the prepared medium into the reactor cylinder 3 through the feed port 7, turn on the air compressor pump, adjust the air rotameter to an appropriate flow rate, and set it between 30 and 100 °C At a good temperature, run the reactor for bacteria immobilization experiments, and when the bacteria load on the carrier is stable, proceed to continuous operation. The pump continuously inputs the culture medium from the feed port 7 into the reactor cylinder 3, while the discharge port 11 drains at the same rate, and samples are taken a...

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Abstract

The invention discloses a vertical cell immobilized reactor for producing ferric irons by biological oxidation. The immobilized reactor is mainly composed of a round top cover (1), an upper flange (2), a reactor cylinder (3), a gas distributor (4), a lower flange (5), an inverted cone pedestal (6), a feeding inlet (7), a waste liquid-discharging port (8), an air vent (9), a sampling outlet (10), a discharging port (11) and an air hole board (12). The immobilized reactor is a cell immobilized reactor for producing the ferric irons which employs moderate thermophilic Siberian influenza bacteria as immobilized bacteria and polyurethane foam as a vector. The immobilized reactor solves the problem of low reaction rate and toxicity by toxic ions in a solution during a process of oxidizing Fe2+ into Fe3+ by bacterial oxidation in a biology process during a preoxidation treatment process of minerals during a gold production process, and can increase the oxidation rate of Fe2+ by the bacteria. The vertical cell immobilized reactor has the advantages of few bacterial contaminations, uniform and sufficient air supply, capacity for continuous operation, high oxidation rate, etc.

Description

technical field [0001] The invention relates to production equipment for producing ferric iron by bacteria oxidation of divalent iron in the mineral pre-oxidation treatment process in the gold production process. Background technique [0002] Bioleaching is one of the pretreatment processes for refractory ores. With the continuous reduction of rich ores, refractory and low-grade gold ores will become the main raw materials for gold production in my country, that is, the main target of bacterial oxidation pretreatment. Low-grade ores are mainly For sulfide ores, the microorganisms involved in the leaching process are diverse. Since the reaction temperature of room temperature bacteria is up to 40-45°C, it generally takes 4-5 days to achieve the necessary oxidation rate of sulfide ore, while most thermophilic bacteria growing above 60°C lack cell walls and cannot tolerate high ore pulp. The strong shear force caused by the concentration, and the moderate thermophilic bacteria ...

Claims

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Application Information

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IPC IPC(8): C22B3/18
CPCY02P10/20
Inventor 李媛媛张广积曹俊雅杨超
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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