Laterite-nickel ore leaching and nickel separating method
A laterite nickel ore and separation method technology, applied in the field of mineral processing, can solve problems such as complex process routes, poor material recycling, and high requirements for equipment and process conditions
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Embodiment 1
[0040] A kind of laterite nickel ore leaching and nickel separation method, method steps are as follows:
[0041] Step 1, select the laterite nickel ore containing 0.5-2.0% Ni by weight, and grind the laterite nickel ore until the particle size is less than or equal to 200 mesh, which accounts for 60% of the total amount, so as to make nickel-containing fine ore;
[0042] Step 2, adding the nickel-containing fine ore into the ammonium bisulfate solution and mixing it into a slurry, the ammonium bisulfate solution of the slurry and the nickel-containing fine ore have a liquid-solid ratio of 3:1; the mass concentration of the ammonium bisulfate solution is 80%;
[0043] Step 3: Heat the ore pulp to 180°C under stirring conditions for reaction, and perform solid-liquid separation for the first time after the reaction to obtain crude liquid and leaching slag; the stirring rate is 80 rpm, and the reaction time is 140 minutes;
Embodiment 2
[0049] A kind of laterite nickel ore leaching and nickel separation method, method steps are as follows:
[0050]Step 1, select the laterite nickel ore containing 0.5-2.0% Ni by weight, and grind the laterite nickel ore until the particle size is less than or equal to 200 mesh, which accounts for 80% of the total amount, and make nickel-containing fine ore;
[0051] Step 2, adding the nickel-containing fine ore into the ammonium bisulfate solution and mixing to make a pulp, the liquid-solid ratio of the ammonium bisulfate solution of the pulp and the nickel-containing fine ore is 6:1; the mass concentration of the ammonium bisulfate solution is 20%;
[0052] Step 3: Heat the ore pulp to 60°C under stirring conditions for reaction, and perform solid-liquid separation for the first time after the reaction to obtain crude liquid and leaching slag; the stirring rate is 150 rpm, and the reaction time is 5 minutes;
[0053] Step 4. After removing metal impurity ions, the obtained cr...
Embodiment 3
[0058] A kind of laterite nickel ore leaching and nickel separation method, method steps are as follows:
[0059] Step 1, select the laterite nickel ore containing Ni 0.5~2.0% by weight, and grind the laterite nickel ore until the particle size is less than or equal to 200 mesh, which accounts for 70% of the total amount, and make nickel-containing fine ore;
[0060] Step 2, adding the nickel-containing fine ore into the ammonium bisulfate solution and mixing it to make ore pulp, the liquid-solid ratio of the ammonium bisulfate solution of the ore pulp and the nickel-containing fine ore is 4.5:1; the mass concentration of the ammonium bisulfate solution is 50%;
[0061] Step 3: Heat the ore pulp to 120°C under agitation for reaction. After the reaction, perform solid-liquid separation for the first time to obtain crude liquid and leaching slag; the agitation rate is 120 rpm, and the reaction time is 75 minutes;
[0062] Step 4. After removing metal impurity ions, the obtained ...
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