Method and system for removing fluorine and/or chlorine from sulfate solution through flash evaporation
A sulphate and flash evaporation technology, which is applied in chemical instruments and methods, flash evaporation, copper sulfate, etc., can solve problems such as the difficulty in realizing the resource utilization of fluorine and chlorine, the difficulty in meeting the requirements of the hydrometallurgy system, and the inability to achieve simultaneous removal, etc. Achieve the effect of environmental friendliness, less investment in equipment, and low cost of removal
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Embodiment 1
[0046] Taking the removal of fluorine and chlorine in copper sulfate solution (Cu:84.4g / L; F:127.2mg / L; Cl:3.9g / L, pH=4.2) as an example, first add sulfuric acid to the copper sulfate solution to adjust the acidity of the solution (Referring to the concentration of sulfuric acid in the mixed solution) is 13.1g / L, after mixing evenly, pump it into the high-pressure plate heat exchanger with a high-pressure pump, control the flow rate to 4.2L / min, and ensure that the temperature of the copper sulfate solution at the outlet is 180±3 ℃, and then introduced into the preheated flash evaporation chamber. When performing flash evaporation, it is necessary to maintain the temperature of the volatilization chamber at 120°C and the pressure at 600-800Pa. After the flash evaporation is completed, copper sulfate crystalline slag can be obtained at the bottom of the flash reactor, and the crystalline slag is collected and sampled for analysis of fluorine and chlorine content. The fluorine ...
Embodiment 2
[0052] Taking the removal of fluorine and chlorine in zinc sulfate solution (Zn: 162.7g / L; F: 1207.8mg / L; Cl: 3.1g / L, pH=4.6) as an example, first add sulfuric acid to the copper sulfate solution to adjust the acidity of the solution After mixing evenly, pump it into the high-pressure plate heat exchanger with a high-pressure pump, control the flow rate to 4.5L / min, ensure that the temperature of the copper sulfate solution at the outlet is 210±3°C, and then introduce it into the preheated flash evaporation chamber. When performing flash evaporation, it is necessary to maintain the temperature of the volatilization chamber at 130°C and the pressure at 300-500Pa. After the flash evaporation is completed, zinc sulfate crystalline slag can be obtained at the bottom of the flash reactor, and the crystalline slag is collected and sampled for analysis of fluorine and chlorine content. The fluorine content in the zinc sulfate crystal slag is less than 1ppm, and the chlorine content ...
Embodiment 3
[0058] Taking the removal of fluorine and chlorine in nickel sulfate solution (Ni:92.4g / L; F:2415.4mg / L; Cl:1.4g / L, pH=2.5) as an example, first add sulfuric acid to the copper sulfate solution to adjust the acidity of the solution After mixing evenly, pump it into the high-pressure plate heat exchanger with a high-pressure pump, control the flow rate to 2.7L / min, ensure that the temperature of the copper sulfate solution at the outlet is 180±3°C, and then introduce it into the preheated flash evaporation chamber. When performing flash evaporation, it is necessary to maintain the temperature of the volatilization chamber at 120°C and the pressure at 400-600Pa. After the flash evaporation is completed, nickel sulfate crystalline slag can be obtained at the bottom of the flash reactor, and the crystalline slag is collected and sampled for analysis of fluorine and chlorine content. The fluorine content in the nickel sulfate crystal slag is less than 1ppm, and the chlorine conten...
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