Method for producing electrolysis nickel from nickel-cobalt concentrate of laterite
A technology for enrichment and laterite ore, which is applied in the improvement of process efficiency, photography technology, instruments, etc., can solve the problems of low metal recovery rate, high production cost and high residual rate, and achieve high metal recovery rate and suitable raw materials. Wide range of effects and simple process
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Embodiment 1
[0033] The nickel-cobalt enrichment (Ni 24.80%, Co 1.16%, Mg 3.42%, Mn 3.01%, Fe 1.55%) (dry basis) was dried in an oven at 95°C until the water content was 8%. Weigh 100g of the dried material, add 10g of coke and 10g of quartz, pretreat it in a muffle furnace at 900°C for 2 hours, and produce 69.6g of the reduced material. The pretreated material was pyrolyzed at 1600°C for 0.5h to produce 40g of slag (Ni 1.64%, Co 0.042, Si 14.6, Mg 28.8, Mn 14.3), 35g of nickel-cobalt enrichment, and the composition was: Ni 85.5%, Co 4.03%, Si 0.28%, Mg<0.005%, Mn 4.2%.
[0034] The nickel-cobalt material is electrolyzed under the condition of cell voltage 1.8-2.2V, the electrolysis temperature is 60-65°C, the current efficiency of cathodic deposition of nickel is 98.6%, the current efficiency of thick nickel anode dissolution is 82%, and 30g of qualified electrolytic nickel is obtained. The anolyte is returned to use after oxidation neutralization to remove iron, sulfide to remove copper...
Embodiment 2
[0036] The nickel-cobalt enrichment (Ni 20.15%, Co 0.95%, Mg 2.85%, Mn 2.69%, Fe 2.01%) (dry basis) was dried in an oven at 95°C until the water content was 12%. Weigh 100g of the dried material, add 5g of coke and 5g of quartz, pretreat it in a muffle furnace at 300°C for 6h, and produce 72.35g of the reduced material. The pretreated material was pyrolyzed at 1000°C for 6 hours to produce 42g of slag (Ni 1.22%, Co 0.035, Si 12.34, Mg25.6, Mn 12.3), 29g of nickel-cobalt enrichment, and the composition was: Ni 84.9%, Co 3.85%, Si 0.25%, Mg<0.005%, Mn 2.1%.
[0037] The nickel-cobalt material is electrolyzed under the condition of cell voltage 1.8-2.2V, the electrolysis temperature is 60-65°C, the current efficiency of cathodic deposition of nickel is 98.5%, the current efficiency of thick nickel anode dissolution is 81%, and 26g of qualified electrolytic nickel is obtained. The anolyte is returned to use after oxidation neutralization to remove iron, sulfide to remove copper a...
Embodiment 3
[0039]The nickel-cobalt enrichment (Ni 25.68%, Co 1.13%, Mg 2.49%, Mn 2.87%, Fe 2.56%) (dry basis) was dried in an oven at 95°C until the water content was 10%. Weigh 100g of the dried material, add 10g of coke and 10g of quartz, pretreat it in a muffle furnace at 1200°C for 1 hour, and produce 68.54g of the reduced material. The pretreated material was pyrolyzed at 1200°C for 3 hours to produce 39g of slag (Ni 1.43%, Co 0.028, Si 12.34, Mg 23.45, Mn 13.6), 28g of nickel-cobalt enrichment, and the composition was: Ni 85.67%, Co 4.03%, Si 0.34%, Mg<0.005%, Mn 2.6%.
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