Method for extracting ferric oxide, aluminum oxide and scandium oxide through neutralization of cobaltous hydroxide nickel smelting slag and waste titanium dioxide acid
A technology of cobalt-nickel hydroxide and titanium dioxide waste acid is applied in the direction of improving process efficiency, which can solve the problems of high cost, long process flow, loss of scandium, etc., so as to improve the utilization rate of ore materials, reduce environmental pollution, and reduce the cost. Effect
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Embodiment 1
[0028] A method for neutralizing and extracting iron oxide, aluminum oxide and scandium oxide by using cobalt-nickel hydroxide smelting slag and titanium white waste acid, comprising the following steps:
[0029] 1) Mix cobalt-nickel hydroxide smelting slag with titanium white waste acid and water, the weight ratio of the three is 3:1:8, carry out neutralization reaction at 45°C, and control the pH of the reaction end point to 0.5-2.5;
[0030] 2) Add flocculant gelatin to the reaction product of step 1), the amount of gelatin added is 2 / 1000 of the cobalt-nickel hydroxide smelting slag, to precipitate the silicon in the cobalt-nickel hydroxide smelting slag, and then filter the product Obtain filtrate and filter residue;
[0031] 3) Extract the filtrate obtained in step 2) at 60°C. The extraction solvent includes an organic phase and water. The volume ratio of the organic phase to water is 3:1. The number of extraction stages is 8. The organic phase includes an extractant, C...
Embodiment 2
[0038] A method for neutralizing and extracting iron oxide, aluminum oxide and scandium oxide by using cobalt-nickel hydroxide smelting slag and titanium white waste acid, comprising the following steps:
[0039]1) Mix cobalt-nickel hydroxide smelting slag with titanium white waste acid and water, the weight ratio of the three is 3:1:8, carry out neutralization reaction at 65°C, and control the pH of the reaction end point to 0.5-2.5;
[0040] 2) Add flocculant bone glue to the reaction product of step 1), the amount of bone glue added is 5 / 1000 of the mass of the cobalt-nickel hydroxide smelting slag, so as to precipitate the silicon in the cobalt-nickel hydroxide smelting slag, and then the product Filter to obtain filtrate and filter residue;
[0041] 3) Extract the filtrate obtained in step 2) at 40°C, the extraction solvent includes organic phase and water, the volume ratio of the organic phase to water is 5:1, the number of extraction stages is 10, the organic phase incl...
Embodiment 3
[0048] A method for neutralizing and extracting iron oxide, aluminum oxide and scandium oxide by using cobalt-nickel hydroxide smelting slag and titanium white waste acid, comprising the following steps:
[0049] 1) Mix cobalt-nickel hydroxide smelting slag with titanium white waste acid and water, the weight ratio of the three is 3:2:9, carry out neutralization reaction at 85°C, and control the pH of the reaction end point to 0.5-2.5;
[0050] 2) Add flocculant polyacrylamide to the reaction product of step 1), the amount of polyacrylamide added is one-thousandth of the mass of cobalt-nickel hydroxide smelting slag, so as to precipitate the silicon in the cobalt-nickel hydroxide smelting slag , and then filter the product to obtain filtrate and filter residue;
[0051] 3) Extract the filtrate obtained in step 2) at 60°C. The extraction solvent includes an organic phase and water. The volume ratio of the organic phase to water is 3:1. The number of extraction stages is 10. The...
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