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

Moderate thermophilic enriched substance used for mineral leaching of copper pyrites

A moderately thermophilic and enrichment technology, applied in the direction of microorganism-based methods, microorganisms, biochemical equipment and methods, etc., can solve problems such as slow progress, achieve faster reaction speed, increase bioleaching rate and leaching rate, The effect of shortening the leaching cycle

Inactive Publication Date: 2009-10-21
CENT SOUTH UNIV
View PDF0 Cites 31 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, domestic research has been slow

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
  • Moderate thermophilic enriched substance used for mineral leaching of copper pyrites
  • Moderate thermophilic enriched substance used for mineral leaching of copper pyrites

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Example 1 The collection, cultivation and domestication of the moderate thermophilic enrichment of the present invention

[0012] Prepare liquid medium (or claim B-type medium) to consist of: (NH 4 ) 2 SO 4 3.0g / L, Na 2 SO 4 2.1g / L, MgSO 4 ·7H 2 O 0.5g / L, K 2 HPO 4 0.05g / L, KCl 0.1g / L, Ca(NO 3 ) 2 0.01g / L, 0.1g / L yeast powder, the rest is water.

[0013] Pit water was collected from the Dexing copper mine in Jiangxi, China, the Dabaoshan mine in Guangdong, and the lead-zinc mine in Chenzhou, Hunan. Then these pit waters were mixed together, centrifuged for 2 minutes by a low-speed centrifuge (3000r / min) to remove impurities, and the supernatant was collected. Put the supernatant in a 3L shake flask, add B-type medium, 10g / L ferrous sulfate and 2g / L elemental sulfur, and culture in a shaker at 200r / min at 48°C. When the concentration of microorganisms in the solution reaches 10 8 cells / ml for subculture.

[0014] In addition to 10g / L ferrous sulfate and 2g / ...

Embodiment 2

[0018] Embodiment 2 chalcopyrite ore leaching test 1

[0019] Taking the chalcopyrite produced in Meizhou, Guangdong as the ore sample, the particle size of the ore particles is less than 75 μm, and the composition of the ore sample is shown in Table 1.

[0020] Table 1 Mineral Phase Analysis of Chalcopyrite (Meizhou, Guangdong) Concentrate

[0021]

[0022] Acid leaching was carried out on the ore sample in a glass cylindrical reactor with a cover, and 1800mL of B-type medium was added to inoculate the moderately thermophilic enrichment, the inoculation amount was 10%, and the pulp concentration was 80g / L. The mechanical stirring speed is 500 rpm. The reactor was placed in a constant temperature bath at 48°C with an initial pH value of 2.0. The acid consumption in the leaching process is supplemented by 10mol / L sulfuric acid, and the water lost by evaporation is supplemented by continuous flow of distilled water through a peristaltic pump. After the leaching, the clarif...

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

No PUM Login to View More

Abstract

The invention discloses a moderate thermophilic enriched substance used for mineral leaching of copper pyrites, comprising five mineral leaching microorganisms: acidithiobacillus caldus S2, leptospirillum ferriphilum YSK, sulfobacillus acidophilus ZW-1, sulfobacillus thermosulfidooxidans YN22 and ferroplasma thermophilum L1; the pH value and the temperature which are most suitable for the growth of the enriched substance are respectively 1.4-2.0 and 45-48 DEG C. Compared with the existing microorganisms used for brass bio-heap leaching, the enriched substance not only improves the leaching reaction kinetics and shortens the leaching period, but also reduces the passivation inhibition phenomenon and increases the bioleaching speed and the leaching rate of the copper pyrites; furthermore, the enriched substance can endure high concentration metallic ion at the late stage of bioleaching.

Description

technical field [0001] The invention relates to biometallurgy or bioleaching technology, in particular to enrichment for bioleaching copper. Background technique [0002] Chalcopyrite is a primary sulfide ore that accounts for 70% of copper ore resources in my country. Because chalcopyrite is an insoluble primary sulfide ore with high lattice energy, it has certain difficulties in chemical leaching and biological leaching. In addition, the extracellular polymers produced during the bioleaching process of chalcopyrite, ferropotassium vanadium, ferrovanadium yellowamine, elemental sulfur and some insoluble leaching by-products are wrapped on the surface of chalcopyrite minerals, which together constitute the mineral’s passivation film. It is speculated that this passivation film greatly hinders the absorption of nutrients and oxygen in the solution by the adsorbing microorganisms, and at the same time prevents the metal ions decomposed on the mineral surface from reaching the...

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): C12N1/20C22B3/18C22B15/00C12R1/01
Inventor 邱冠周曾伟民周洪波刘学端徐竞
Owner CENT SOUTH UNIV
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