Method of extracting nickel from nickel ores
A technology of nickel element and nickel ore, which is applied in the direction of improving process efficiency, can solve the problems of high cost, many operation steps, and low iron leaching rate, and achieve the effects of reducing processing difficulty, high product purity, and high extraction rate
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Embodiment 1
[0069] This embodiment provides a method for extracting nickel element from nickel sulfide ore, and the metal element composition of the nickel sulfide ore is shown in Table 1.
[0070] Table 1 Metal element composition table of nickel sulfide ore
[0071] Metal Fe Ni Cu co Al Content (wt%) 43.33 9.21 1.82 0.30 0.11
[0072] The process flow diagram of the method is as figure 1 shown, including the following steps:
[0073] (1) After mixing nickel sulfide ore and sulfuric acid at a molar ratio of 2:1, dry at 150°C for 8 hours, then ball mill the mixed material at a ball milling rate of 800r / min for 8 hours, and then grind the mixed material Heat treatment at 300°C for 10 hours in an air atmosphere;
[0074] (2) leaching the heat-treated product obtained in step (1) with water, the solid-to-liquid ratio of the heat-treated product and water being 50g L -1 , leached at 20°C for 400 minutes, and obtained nickel-rich solution and filter residue...
Embodiment 2
[0078] This embodiment provides a method for extracting nickel element from nickel sulfide ore, and the metal element composition of the nickel sulfide ore is the same as that in Embodiment 1.
[0079] The method comprises the steps of:
[0080] (1) Mix nickel sulfide ore and sulfuric acid at a molar ratio of 5:1, dry at 80°C for 12 hours, and then ball mill the mixed material at a ball milling rate of 400r / min for 12 hours, then mill the mixed material Heat treatment at 500°C for 3 hours in a nitrogen atmosphere;
[0081] (2) leaching the heat-treated product obtained in step (1) with water, the solid-to-liquid ratio of the heat-treated product and water being 200g L -1 , leached at 40°C for 120 minutes, and obtained nickel-rich solution and filter residue after filtration and separation;
[0082](3) Concentrating the nickel-rich solution obtained in step (2) to obtain nickel sulfate, and the filter residue is sequentially subjected to sulfuric acid leaching, extraction and...
Embodiment 3
[0085] This embodiment provides a method for extracting nickel element from nickel sulfide ore, and the metal element composition of the nickel sulfide ore is the same as that in Embodiment 1.
[0086] The method comprises the steps of:
[0087] (1) After mixing nickel sulfide ore, sulfuric acid and sodium sulfate in a molar ratio of 2:2:1, dry at 200°C for 4 hours, and then perform ball milling on the mixed material. The ball milling rate is 1000r / min, and the ball milling time is 1h , and then heat-treat the mixed material at 400°C for 8h under vacuum conditions;
[0088] (2) leaching the heat-treated product obtained in step (1) with water, the solid-to-liquid ratio of the heat-treated product and water being 100g L -1 , leached at 60°C for 100 minutes, filtered and separated to obtain nickel-rich solution and filter residue;
[0089] (3) Concentrating the nickel-rich solution obtained in step (2) to obtain nickel sulfate, and the filter residue is sequentially subjected ...
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Abstract
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