Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for improving biological leaching speed of metallic sulphide ore or concentrate by using leaching liquid containing separated microorganism to inoculate continuously

A metal sulfide, microorganism technology, applied in the direction of process efficiency improvement, etc., can solve the problem that microorganisms are not inoculated, and the precise concentration of cells is not indicated.

Active Publication Date: 2008-09-10
BIOSIGMA
View PDF8 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, U.S. Patent No. 6,284,530 does not indicate the precise concentration of cells used, and in U.S. Patent No. 6,284,530, the microorganisms are not inoculated

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for improving biological leaching speed of metallic sulphide ore or concentrate by using leaching liquid containing separated microorganism to inoculate continuously
  • Method for improving biological leaching speed of metallic sulphide ore or concentrate by using leaching liquid containing separated microorganism to inoculate continuously
  • Method for improving biological leaching speed of metallic sulphide ore or concentrate by using leaching liquid containing separated microorganism to inoculate continuously

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063]To compare the bioleaching activity of native bacteria (without microbial inoculum) relative to a serial inoculation of one microbial type Thiobacillus acidophilus thiooxidans (represented here as Licanantay DSM 17318), and by Wenelen DSM 16786 (acidophilic ferrous oxidizer Thiobacillus) with Licanantay DSM 17318 in a serial inoculation using a primary ore sample from the Codelco-Chile EITeniente Mine, consisting essentially of chalcopyrite (96.6%). The ore sample is bioleached in microcolumns, thereby simulating industrial process conditions in leaching of waste heaps or ore heaps. The experiment was carried out according to the following scheme:

[0064] 1. The column is made of polyvinyl chloride (vinyl polychloride) pipe, has an inner diameter of about 40mm, and contains a 20cm high compacted ore, and has a porous disc containing a 2cm high quartz sand bed at the bottom of the ore. Hold the ore.

[0065] 2. In the column, 225 grams of ores with a fraction of size l...

Embodiment 2

[0078] In order to examine the effect indicated in the previous example in secondary copper ores, the same experimental protocol as in Example 1 was used, but this time with a copper ore mainly composed of secondary copper sulphide species, The ore was obtained from the Codelco-Chile Radomiro Tomic Mine. The bacteria for the serial inoculation were microorganisms of the acidithiothiooxidans type (represented here by Licanantay DSM 17318), a mixture consisting of Wenelen DSM 16786 and Licanantay DSM 17318 was serially inoculated. The average concentration of total iron (as Fe(III)) in the leach solution was 0.17 g / l.

[0079] Be used for the characteristic of the ore of present embodiment as shown in table 2 below:

[0080] Table 2: Mineral composition of the ore used in the column of Example 2

[0081] substance

%Cu

Chalcocite

63.7

blue chalcocite

26.8

copper blue

1.9

Bornite

2.5

Chalcopyrite

0.1 ...

Embodiment 3

[0086] In order to check the effect of the previous examples, especially the initial stage of the method, under different concentrations of ferric ions, the same experimental scheme as described in Example 1 was adopted, this time from Codelco-Chile Mixed sulphide copper ore (40.8% of total copper as chalcopyrite) from the Radomiro Tomic Mine. The bacteria for the serial inoculation were microorganisms of the acidophilus thiothiooxidans type, represented here by Licanantay DSM 17318, and a mixture consisting of Wenelen DSM 16786 and Licanantay DSM 17318 was serially inoculated.

[0087] The performance of the ore used in the present embodiment is shown in table 3 below:

[0088] Table 3: Mineral composition of the ore used in the column of Example 3

[0089]

[0090] From image 3 As can be seen in the results, the iron content in the column is equivalent to 0.05g / L which is common in industrial water, column (i) shows the lowest copper recovery after 48 days of operation...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
electric potential / voltageaaaaaaaaaa
rate of recoveryaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for increasing biological lixiviating speed of metal sulphate ore or ore concentrate in waste pile, tailing dam, scrap yard or other on-line processing. The method is charactered in that an acidophilic thiobacillus thiooxidans type isolated microbe and an acidophilic thiobacillus ferrooxidans type isolated microbe process inoculability continuously to ore or ore concentrate in the event that nature microbe is not exist, and microbe total concentration in continuous inoculability flow reaches about 1*10<7> cells / ml to 5.6*10<7> cells / ml. Especially, the invention discloses continuous inoculability microbe as follows: acidophilic thiobacillus thiooxidans Licanantay DSM 17318, and acidophilic thiobacillus ferrooxidans Wenelen DSM 16786, or other nature microbe above 5*10<7> cells / ml concentration. The invention also includes adding oxide (for example, high-iron ion generated on outside), and adding nutriment in forms of ammonium salt, magnesium salt, ferric salt and kali salt, in addition, injecting air containing CO2 continuously for improving bacilli action in biological lixiviating process of ore or ore concentrate.

Description

field of invention [0001] The present invention discloses a method for increasing the rate of bioleaching of metal sulfide ores or concentrates in waste dumps, tailings dams, waste dumps or other "in situ" (in situ) operations. The method is characterized in that the ore or the concentrate is successively inoculated with a solution containing microorganisms of the Acidithiobacillus thiooxidans type, in the presence or absence of natural microorganisms, and acidophilic oxidase Microorganisms of the type Acidithiobacillus ferrooxidans in which the total concentration of microorganisms in the serial inoculation solution is higher than 1 × 10 7 cells / ml to 5 x 10 9 cells / ml. Among other things, these solutions are characterized in that the content of ferric ions in the seeding solution is higher than 2 g / L. Continuous inoculation was performed until the bioleaching became self-sustaining. In particular, the invention discloses the sequential inoculation of the following substa...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/18
CPCC22B15/0071C22B3/18Y02P10/20
Inventor C·P·A·莫拉莱斯O·R·巴迪利亚
Owner BIOSIGMA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com