High-iron low-grade nickel sulfide ore selective biological leaching process
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology of biological leaching and nickel sulfide ore, applied in the direction of improving process efficiency, etc., can solve the problem of high recovery cost of valuable metals, achieve low cost, reduce processing cost, and save investment
Active Publication Date: 2019-06-25
有研资源环境技术研究院(北京)有限公司
View PDF13 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0005] The purpose of the present invention is to overcome the deficiencies of the above-mentioned technologies, and provide a selective bioleaching process for high-iron and low-grade sulfide ores, which can effectively suppress the growth of dominant species, potential, temperature and other process parameters in the leaching process. Dissolving to achieve selective leaching of nickel-containing minerals to solve the problem of high recovery costs of valuable metals
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
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0051] A domestic company in Jilin flotation nickel concentrate, the iron content is relatively high, and most of them exist in the form of pyrrhotite and pyrite, the main element analysis is shown in Table 1:
[0052] Table 1 Analysis of main elements of ore
[0053]
[0054]
[0055] The ore contains a large amount of quartz and silicate, nickel exists in the form of nickel sulfide and pentlandite, and iron mainly exists in the form of pyrite and pyrrhotite.
[0056] condition:
[0057] The pulp concentration is 18%, the pH value is 1.2, the inoculation amount of the exclusive sulfur oxidizing bacteria Sulfolobus metallicus Retech-ETC-1 is 10%, the shaking table speed is 200r / min, the temperature is 45°C, and the leaching cycle is 12d.
[0058] The results are shown in Table 2:
[0059] Table 2 Leaching results
[0060]
[0061] According to the above conditions, the leaching rate of nickel reached 86.78%, the leaching rate of sulfur was 46.24%, and the le...
Embodiment 2
[0063] A domestic company in Gansu flotation nickel concentrate, the iron content is relatively high, and most of them exist in the form of pyrrhotite and pyrite, the main element analysis is shown in Table 3:
[0064] Table 3 Analysis of main elements of ore
[0065] element
Ni
co
Zn
Fe
Cu
content / %
4.72
0.18
0.13
32.43
0.18
element / %
S
Ca
Mg
SiO 2
other
content
16.85
2.34
7.89
34.15
1.13
[0066] The ore contains a large amount of quartz and silicate, nickel exists in the form of nickel sulfide and pentlandite, and iron mainly exists in the form of pyrite and pyrrhotite.
[0067] condition:
[0068] The pulp concentration is 18%, the pH value is 1.2, the inoculation amount of bacteria Sulfolobus metallicus Retech-ETC-1 is 10%, the shaking table speed is 200r / min, the temperature is 40-45°C, and the leaching cycle is 12d.
[0069] The results are shown in Table 4:
[0...
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
Property
Measurement
Unit
particle size
aaaaa
aaaaa
Login to view more
Abstract
The invention provides a high-iron low-grade nickel sulfide ore selective biological leaching process. The process comprises the following steps of stirring and leaching, selective leaching, deironing, extraction, reverse extraction and electrodeposition, then obtaining a cathode nickel. According to the process, in particular with respect to a flotation nickel sulfide ore concentrate with high iron content and low nickel grade, a stirring biological leaching process is adopted, measures for controlling growth, pH value, temperature and ventilatory capacity of vulcanized bacteria are adopted,redox potential in the leaching process is controlled, dissolution of iron-containing sulfide minerals such as pyrite is effectively inhibited, and selective leaching of the nickel-containing sulfidemineral is realized. The process is short in procedure, simple in equipment, saving in investment, low in cost, free of pollution, high in valuable metal recovery rate and capable of treating low-grade nickel sulfide ore resources which cannot be treated by a pyrogenic process smelting process, utilization range of resources can be expanded, comprehensive recovery level of the nickel metal is improved, and economic benefits, social benefits and environmental benefits of the process is remarkable.
Description
technical field [0001] The invention belongs to the field of biometallurgy of nonferrous metals, and relates to a selective bioleaching process of nickel sulfide ore, in particular to a biostirring leaching process of flotation nickel sulfide concentrate with high iron content and low nickel grade. Background technique [0002] With the continuous mining of mineral resources, the ore tends to be poor and hybridized gradually, with high content of toxic metal ions and impurity minerals, and a close relationship of polymetallic associations. In nature, nickel mainly exists in the form of compounds, and 1 / 2 to 2 / 3 occurs in sulfide minerals in the form of isomorphism. Among them, nickel sulfide ore mainly includes nickel pyrrhotite, chalcopyrite, sulfur nickel diamond ore and sulfur diamond iron ore, etc. my country's nickel ore is dominated by copper nickel sulfide ore, accounting for 86% of the country's total reserves. However, as the grade of nickel resources continues to ...
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
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more