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Bioleaching process of sulfide mineral ore or concentrate or tailing containing alkaline veinstone

A technology for bioleaching and sulfide ore, applied in the direction of improving process efficiency, can solve the problems of slow metal leaching, high cost of chemicals, difficult to control, etc.

Inactive Publication Date: 2008-10-01
有研资源环境技术研究院(北京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large amount of acid consumption in bioleaching of sulfide ores or concentrates or tailings containing alkaline gangue, the prior art controls the pH value of the leaching process by adding sulfuric acid to the spray or dripping liquid. The disadvantages of this method are: the pH value of the leaching process is difficult to control by supplementing sulfuric acid from the outside, the growth of leaching microorganisms is slow, the activity is low, the metal leaching speed is slow, the leaching rate is low, the leaching cycle is long, the production cost is high, and even the biological process cannot be carried out normally. leaching
In addition, directly adding sulfuric acid to adjust the pH value of the leaching system will consume a large amount of sulfuric acid and the cost of chemicals will be high; if a sulfuric acid plant is built, the investment will be large and the cost of acid production will be high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The water sample containing Thiobacillus ferrooxidans, Thiobacillus thiooxidans and Microspirillum ferrooxidans collected from the acid mine water of copper mine, the pH value of the water sample is 2.3, and the water sample has a pH value of 1.7 to 2.0 9K basal medium for isolation and culture, the condition is that 1 liter of culture contains (NH4) 2 SO 4 3.0 g, KCl 0.1 g, K 2 HPO 4 0.5 g, MgSO 4 ·7H 2 O 0.5 g, Ca(NO 3 ) 2 0.01 g, FeSO 4 ·7H 2 O 44.43 grams, PH value 1.85, 20% of bacteria-containing water samples, temperature 30°C, shaker speed 150 rpm, the biological activity of the bacteria is autotrophic, and the energy is obtained by oxidizing ferrous iron and reduced sulfur , as CO in air 2 It is a carbon source, and ammonium nitrogen is used as a nitrogen source; the shape of the bacteria is rod-shaped and rod-shaped; the size of the bacteria is 0.5-1.0×1.0-2.0 microns. Then add alkaline gangue-containing copper sulfide ore with a particle size of le...

Embodiment 2

[0017] Take the acidic pit water from copper-cobalt ore, and adopt the same conditions as in Example 1 to carry out isolation and cultivation. The shape of the cultured bacteria obtained after the isolation and cultivation is rod-shaped and rod-shaped, and the size of the bacteria is 0.5~1.0×1.0~2.0 microns , Biological activity is autotrophic, obtains energy by oxidizing ferrous iron and reduced sulfur, and uses CO in the air 2 As a carbon source, ammonium nitrogen is used as a nitrogen source, and then in ordinary tap water with a pH value of 1.7 to 2.0, an alkaline gangue-containing nickel-cobalt-copper ore with a particle size of 76 microns and 95% (wherein the MgO content is 28.80 %, CaO content is 2.5%), and pyrite concentrate powder to carry out the adaptive domestication culture of leaching bacteria for more than 3 generations, in the domestication culture, the consumption of copper sulfide ore containing alkaline gangue is 2 ~ 20g / 100ml water, the consumption of pyri...

Embodiment 3

[0020] With embodiment 1, the ore containing alkaline gangue that adopts is the flotation tailings of nickel-cobalt-copper ore (wherein the MgO content is 29.60%, and the CaO content is 2.69%). The flotation tailings and pyrite concentrate powder (sulfur product. 39.2%) of 10% nickel-cobalt-copper sulfide were domesticated and cultivated, and then gradually amplified and cultivated to obtain a bacterial concentration of 10 8 ~10 9 individuals / ml of adaptive domestication leaching bacteria.

[0021] The flotation tailings of the nickel sulfide diamond-copper ore containing alkaline gangue, the particle size is less than 76 microns, accounting for 60-70%, (wherein the MgO content is 29.60%, and the CaO content is 2.69%), and then with the particle size Pyrite concentrate powder with less than 76 microns accounting for 95% and sulfur grade of 39.2% is mixed uniformly at a ratio of 100:30 and then pelletized. The pellet size is 8-12mm, and the pellets are cured for 24-48 hours be...

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Abstract

A biological extracting technology for the ore or ore comcentrate or tailings of sulfide containing alkaline vein rock includes separating and culturing the bacterial mixture of thiobacillus ferrooxidan and microspirillum ferrooxidan in 9K culture medium, naturalizing culture in the water in which said ore to be extracted and pyrite ore or sulfur are immersed, enlarge culture, mixing the ore tobe extracted with pyrite ore and sulfur powder, stacking, and showing the bacteria contained high-Fe liquid for extracting metal. Its advantages are short period, high extracting speed and rate, and low cost.

Description

technical field [0001] The invention relates to a biological leaching process, in particular to a biological leaching process for sulfide ore or concentrate or tailings containing alkaline gangue. Background technique [0002] In the process of biometallurgy, maintaining the activity of ore leaching microorganisms is the technical key of the bioleaching process, and one of the key factors affecting the activity of ore leaching microorganisms is the pH value of the bioleaching system. Due to the large amount of acid consumption in bioleaching of sulfide ores or concentrates or tailings containing alkaline gangue, the prior art controls the pH value of the leaching process by adding sulfuric acid to the spray or dripping liquid. The disadvantages of this method are: the pH value of the leaching process is difficult to control by supplementing sulfuric acid from the outside, the growth of leaching microorganisms is slow, the activity is low, the metal leaching speed is slow, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/18
CPCY02P10/20
Inventor 阮仁满温建康宋永胜
Owner 有研资源环境技术研究院(北京)有限公司
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