High-iron low-grade nickel sulfide ore selective biological leaching process
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
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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:
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