Is there any use for purifying dilute acid produced from sulfur mines?
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Question: Is there any method for purifying and reusing dilute acids? Our factory plans to use it for dry absorption and water addition. How about that?
Hehe, Binghe is familiar with a company that is currently in the initial stages of operation; it filters the acid from the purification cycle and then feeds it into the dry absorption system. Because pyrite is used to produce acid with fewer impurities, it is easy to filter. However, if the impurities in the purification acid, such as arsenic and fluorine, are present in high concentrations, it is not feasible to do so.
There are also cases where, after the mineral dust has settled, dilute acid is directly sent to the phosphoric acid extraction tank.
There are those used for acid preparation in the production of superphosphate.
The problem is that it has a high arsenic content and has not been used in the production of superphosphate; I wonder if there are any other methods?
Reply to 5# l5686182: It is possible to consider removing metal ions, but the investment in equipment for new processes is relatively high
My email address is csfuwsbok@tom.com. Could you provide technical information regarding the processes used to remove impurities such as metal ions and fluoride?
What should the acid concentration be? Weak acids contain too many impurities, which affect product quality
The acid concentration is generally around 5%, with a maximum of no more than 10%. The impurity ions are mainly Fe2+, F-, etc
Arsenic and fluorine can be removed before adding it to the absorption process
It can be used in the production of phosphoric acid and phosphate fertilizers. What are the specifications for the dilute acid at your facility – what is the acid concentration and the level of impurities?