Biological-chemical dipolar reactor leaching process

A bioreactor and reactor technology, applied in the field of metallurgical bioengineering, can solve the problems of increasing power consumption, limiting the application value of traditional heap leaching process, and limited leaching rate of sulfide ore, so as to increase economic benefits, improve ore leaching rate, The effect of reducing environmental pollution

Active Publication Date: 2008-11-05
LANZHOU UNIVERSITY
View PDF0 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the heap leaching process of sulfide ore still has many deficiencies: ①Temperature is the key factor affecting the leaching of sulfide ore, but Thiobacillus ferrooxidans, which is the most widely used among known ore leaching microorganisms, can only survive below 35°C [2]
Oxygen is usually required to feed the mine pile, which increases power consumption [3] , but the improvement of sulfide ore leaching rate is limited
These unsatisfactory aspects limit the application value of the traditional heap leaching process

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
  • Biological-chemical dipolar reactor leaching process
  • Biological-chemical dipolar reactor leaching process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0024] Example Biological-chemical bipolar reaction system leaching of Jinchuan nickel ore

[0025] The main body of the process device is composed of bioreactors and chemical reactors, which are bipolar reactors connected in series. The bioreactor is a hollow glass tube (Φ3.0cm×40cm) with stoppers at both ends, and its effective volume is 270ml. The effective volume of the chemical reactor is 300ml. When the bipolar reactor is in operation, the bioreactor is firstly connected with Thiobacillus ferrooxidans, and then the continuous culture system of Thiobacillus ferrooxidans is started, and the operating temperature is 30°C. When the microbial activity meets the requirements and the effective volumes of the bioreactor and the chemical reactor reach 270ml and 300ml respectively, the process of continuous leaching of Jinchuan nickel ore by Thiobacillus ferrooxidans begins. Wherein, 15g of Jinchuan nickel ore is added into the chemical reactor, and the operating temperature is ...

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 mineral leaching technique of a double-stage biological and chemical reactor, which separates the traditional biological mineral leaching process into a biological reacting process with bacteria growth and Fe2+ oxidation as well as a chemical reacting process with bacteria product oxidation and mineral leaching, and suitable conditions of the two processes are respectively controlled, thus improving efficiency of bacteria oxidation and mineral leaching. Compared with currently popular biological mineral leaching methods, the mineral leaching technique of the double-stage biological and chemical reactor greatly improves production efficiency.

Description

Technical field [0001] The invention relates to a biological-chemical bipolar reactor leaching process, which mainly relates to a process for treating sulfide ore in combination with biological and chemical reactions based on iron-oxidizing bacteria, and belongs to the field of metallurgical bioengineering. Background technique [0002] Bioleaching is a hydrometallurgical process in which metals in minerals are dissolved by the action of certain microorganisms. At present, bioleaching is mainly used in the leaching of sulfide ores. The bioleaching processes of Thiobacillus ferrooxidans mainly include tank leaching and heap leaching. Tank leaching is to fully grind the raw materials (0.04-0.1mm) to ensure sufficient specific surface area, then mix them with the leaching agent, and react under the condition of vigorous stirring and ensuring a certain temperature, so the contact area between the two phases is large and the mass transfer The conditions are good and the leachin...

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
IPC IPC(8): C22B3/18
CPCY02P10/20
Inventor 李红玉杨晓娟王玉建
Owner LANZHOU UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap