A kind of stripping germanium method from germanium-containing fluorosilicate solution
A fluosilicic acid and extraction technology, applied in the field of hydrometallurgy, can solve the problems of poor organic phase regeneration ability, large amount of washing liquid, and large amount of wastewater, and achieve the effects of improving regeneration ability, reducing production cost, and reducing loss rate
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Embodiment 1
[0025] A method for stripping germanium from germanium-containing fluorosilicate solution, using N 235 Extract the germanium from the germanium-containing fluorosilicate solution to obtain the raffinate; then use the sodium hydroxide solution containing ammonium ions to perform back-extraction treatment on the extracted organic phase to obtain the back-extraction solution; then add sulfuric acid solution to the back-extraction solution The pH is adjusted to 9, so that the germanium undergoes hydrolysis treatment, and the filter residue is obtained by filtering; the filter residue is calcined at a temperature of 400° C. to obtain the germanium concentrate. The finally obtained germanium concentrate contains 7% germanium, 0.5% F and 4% Si.
[0026] In the above with N 235 Extract germanium from germanium-containing fluorosilicate solution by using N 235 - Kerosene system extracts germanium from germanium-containing fluorosilicate solution. where N 235 - The kerosene system i...
Embodiment 2
[0033] A method for back-extracting germanium from a germanium-containing fluorosilicate solution, using N235 to extract germanium from the germanium-containing fluorosilicate solution to obtain an extraction residue; and then using a sodium hydroxide solution containing ammonium ions to reverse the extracted organic phase Extraction treatment to obtain a back-extraction solution; adding sulfuric acid solution to the back-extraction solution to adjust the pH to 11, so that the germanium undergoes hydrolysis treatment, filtering to obtain a filter residue; calcining the filter residue at a temperature of 500°C to obtain a germanium concentrate. The finally obtained germanium concentrate contains 10% germanium, 0.3% F and 3% Si.
[0034] In the above, using N235 to extract germanium from the germanium-containing fluorosilicate solution is to use the N235-kerosene system to extract germanium from the germanium-containing fluorosilicate solution. The N235-kerosene system is 30% N2...
Embodiment 3
[0040] A method for back-extracting germanium from a germanium-containing fluorosilicate solution, using N235 to extract germanium from the germanium-containing fluorosilicate solution to obtain an extraction residue; and then using a sodium hydroxide solution containing ammonium ions to reverse the extracted organic phase Extraction treatment to obtain a back-extraction solution; adding sulfuric acid solution to the back-extraction solution to adjust the pH to 10, so that the germanium undergoes hydrolysis treatment, filtering to obtain a filter residue; calcining the filter residue at a temperature of 450°C to obtain a germanium concentrate. The finally obtained germanium concentrate contains 8% germanium, 0.1% F and 2% Si.
[0041] In the above, using N235 to extract germanium from the germanium-containing fluorosilicate solution is to use the N235-kerosene system to extract germanium from the germanium-containing fluorosilicate solution. The N235-kerosene system is 30% N23...
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