Effect of the temperature of acidic circulating water on concentration during phosphate concentration process
Thread Content
Hello, experts. I would like to ask what impact raising the temperature of the acidic circulating water from 33–41°C to 33–48°C has on the phosphoric acid concentration process; could this affect fluoride absorption or the quality of the concentrate?
Thank you for your answer. Based on my basic understanding: 1. As the temperature rises, more water evaporates, which affects the vacuum level and thus the phosphoric acid concentration； 2. As the temperature rises, fluorine absorption is affected, resulting in a decrease in the concentration of fluosilicic acid and an increase in the fluorine content in the exhaust gases ； However, it is possible to compensate for the loss of vacuum by increasing the power of the vacuum pump, thereby maintaining the phosphate concentration; at the same time, the amount of water circulated can be increased to ensure a high fluoride recovery rate.