Acid production from pyrite
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I am seeking information on the methods for removing the slag from the calcination furnace. In the entire system for producing acid from pyrite, the total water consumption is 178,513 cubic meters per day, of which 5,800 cubic meters per day is fresh water, while 172,456 cubic meters per day comes from recycled water. Is 5,800 cubic meters of fresh water an excessive amount? Additionally, I need to know about the methods for wastewater treatment; the process that is being used involves two-stage neutralization with lime. Is this process feasible? And will the addition of two box-type filter presses be sufficient to extract the lime slurry?
The process of neutralizing with lime in two stages and then adding iron salts is feasible; if further treatment of the wastewater from the system is desired, a membrane treatment system can be added! It’s just that the cost is a bit high, hehe
I am not aware of your sulfuric acid production capacity or the specific manufacturing processes you use. From the perspective of water conservation, dry slag disposal should be employed for removing slag. Additionally, I noticed that your wastewater treatment process still relies on lime neutralization, which incurs significant costs. I suggest that you avoid using lime for neutralization and instead opt for a filtering system followed by a closed-loop system; this will help save a considerable amount of money. If you are interested, I can assist you with designing such a system. You can contact me at zhaoqimin.1965@163.com.
To add to what wasn’t mentioned above: for the wastewater treatment process, if I design it for you, it’s not necessary to use a filter press, which can **save on investment; of course, environmental standards must still be met.
I’d like to ask the person upstairs: could you explain in more detail the process that doesn’t involve using lime for neutralization? I want to learn about it
I can’t explain it clearly; if you want to learn*, you can look for some materials or books.