Method for removing iron and aluminum from solution containing iron and aluminum and recycling aluminum
A technology for removing iron and aluminum solutions, applied in the fields of chemistry, hydrometallurgy, and materials, can solve the problems of loss of valuable metals, difficulty in filtering precipitated slag, etc., and achieve good removal, lower production costs, and good economic and environmental benefits. Effect
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Embodiment 1
[0058] The present embodiment provides a method for removing iron and aluminum from an iron-containing aluminum solution and recycling aluminum, the method comprising the following steps:
[0059] (1) The acidic leaching solution containing iron and aluminum elements includes: Ni 2+ : 20g / L, Co 2+ : 20g / L, Mn 2+ : 10g / L, Fe 3+ : 3g / L, Al 3+ : 1g / L, the pH value of the acid leaching solution is 0.5, and the Na concentration of 20g / L under air oxidation 2 CO 3 The solution was added dropwise to the acid leaching solution at a rate of 1 mL / min, adjusted to pH 3.5, and stirred at 80° C. for 300 min while heating.
[0060] (2) adding adenosine triphosphate dropwise to the iron removal solution described in step (1) at a speed of 1 mL / min, the Al in the iron removal solution 3+ The molar ratio to adenosine triphosphate is 1:0.5, and 5g / L of Na is added. 2 CO 3 The solution adjusts the pH of the solution to 2.5, and stirs for 20 minutes while heating at 70° C. The stirring sp...
Embodiment 2
[0063] The present embodiment provides a method for removing iron and aluminum from an iron-containing aluminum solution and recycling aluminum, the method comprising the following steps:
[0064] (1) The acidic leaching solution containing iron and aluminum elements includes: Ni 2+ : 30g / L, Co 2+ : 30g / L, Mn 2+ : 10g / L, Fe 3+ : 3g / L, Al 3+ : 2g / L, the pH value of the acid leaching solution is 1.0, and the Na concentration is 50g / L under air oxidation. 2 CO 3 The solution was added dropwise to the acid leachate at a speed of 5mL / min, adjusted to pH 3.5, and stirred at 80°C for 300min while heating, and the stirring speed was 150rpm, and the iron-aluminum slag and the iron-removing solution were obtained by solid-liquid separation;
[0065] (2) phytic acid is added dropwise to the iron removal solution described in step (1) at a speed of 5mL / min, the Al in the iron removal solution 3+ The molar ratio with phytic acid is 1:1, adding 5g / L of Na 2 CO 3The solution adjusts ...
Embodiment 3
[0068] The present embodiment provides a method for removing iron and aluminum from an iron-containing aluminum solution and recycling aluminum, the method comprising the following steps:
[0069] (1) The acidic leaching solution containing iron and aluminum elements includes: Cr 3+ : 30g / L, V 5+ : 1g / L, Fe 3+ : 3g / L, Al 3+ : 1g / L, the pH value of the acid leaching solution is 1.0, and the Na concentration of 30g / L under air oxidation 2 CO 3 The solution was added dropwise to the acid leaching solution at a speed of 5mL / min, the pH was adjusted to 3.5, and the mixture was heated and stirred at 80°C for 300min, and the stirring speed was 400rpm, and the iron-aluminum slag and the iron-removing solution were obtained by solid-liquid separation;
[0070] (2) cyclohexanecarboxylic acid is added dropwise to the iron removal solution described in step (1) at a speed of 5mL / min, the Al in the iron removal solution 3+ The molar ratio to cyclohexanecarboxylic acid is 1:0.25, and 5...
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