Extraction process of low-grade, complicated and difficultly separated metal sulfide ore
An extraction process, low-grade technology, applied in the direction of improving process efficiency, to achieve the effect of reducing operating costs and omitting the beneficiation process
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Embodiment 1
[0033] Take 1000g of refractory copper-cobalt ore from a place in Jilin: the ore contains Co, Cu, Ni, Pb, Zn, As and other elements, among which Cu and Co are valuable elements that can be comprehensively recovered, and the mass fraction of Cu is 0.19 / 10 -2 , Co mass fraction is 0.045 / 10 -2 , the intercalation relationship between sulfides is close, and the particle size is very fine. Due to the different mineralization stages, the particle size of Cu and Co sulfides is very different. The flotation recovery rate is below 70%, and the grade is also low, which cannot be used. The economic indicators become sluggish ore.
[0034] a. Grinding copper and cobalt raw ore to -180 mesh accounts for more than 85%;
[0035] b. Add 50g of ammonium chloride according to the mass ratio of the ground copper and cobalt ore, stir evenly, and place for 10 hours;
[0036] c. place the mixed material in a roasting furnace, and roast for 30 minutes at air: nitrogen = 1:1, 500°C in an oxygen-def...
Embodiment 2
[0042] Take 1000g of whole mud hydrogenation tailings from a gold mine in Heilongjiang. The whole mud hydrogenation tailings contain 0.035% Co, 0.038% Ni, 0.14% C, and 0.12 As. The cobalt-containing minerals in the ore contain relatively high arsenic.
[0043] a. Add 30g of ammonium chloride to the cyanide tailings according to the mass ratio, stir evenly, and place for 12 hours;
[0044] b. Place the mixed material in a roasting furnace, and roast for 30 minutes at 500°C in an oxygen-deficient atmosphere at air: nitrogen = 1:1;
[0045] c. Then in oxygen: air=1:1 oxygen-enriched atmosphere, the temperature was raised to 650° C. and then roasted for 90 minutes;
[0046] d. Put the calcined sand in a sulfuric acid solution with a temperature of 90°C and a concentration of (1+9), solid:liquid=1:9, and stir for leaching for 4 hours;
[0047] e. The leaching solution is sent to the metal separation section, and different metals are separated and recovered by using the existing ...
Embodiment 3
[0050] Take 1000g of flotation tailings from a closed copper mine in Jilin Province. The metal mass fractions of the tailings are: Co 0.048%, Cu 0.71%, Zn 2.2%;
[0051] a. Add 40g of ammonium chloride according to the mass ratio of the materials, stir evenly, and place for 11 hours for later use;
[0052] b. The mixed material is placed in a roasting furnace, and roasted for 30 minutes at 500 ° C under an oxygen-deficient atmosphere at air: nitrogen = 1:1;
[0053] c. Then heat up to 600°C under air atmosphere and bake for 90 minutes;
[0054]d. Put the calcined sand in a sulfuric acid solution with a temperature of 90°C and a concentration of (1+9), solid:liquid=1:7, and stir and leach for 4 hours;
[0055] e. The leachate is sent to the metal separation and enrichment section;
[0056] Using this method, the leaching rates of Co, Cu, and Zn are 92.3%, 94.4%, and 92.6%, respectively.
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