The leaching rate of zinc monoxide produced in rotary kilns is not high; please help think of a solution
Thread Content
Firstly, the zinc content in the zinc oxide we produce is around 41-42, while the lead content is around 11. The raw materials we use include coal with a calorific value of 6000 kcal, a volatilization rate of 12%, sulfur content of 4%, acid-leached residue containing 7% zinc and 8% lead; the sulfur content here is relatively high, at 10%. There’s also electrolytic red mud, which contains 4-5% sulfur. Additionally, we use recycled materials – steel slag isn’t available, so it’s not being used at the moment. The zinc content in the products we produce is still around 41-42, with a lead content of around 11, chlorine content of 2-3%, and sulfur content of 10%. Coal accounts for 300 kcal in these materials, and the leaching efficiency is only 60%. I would like to ask everyone what might be the reasons for this low leaching efficiency, and how it can be addressed
Under a reducing atmosphere at high temperatures, zinc sulfate is reduced to zinc sulfide, with some also forming zinc sulfite.
It’s probably mainly because some of the zinc has turned into zinc sulfide; zinc sulfite is soluble
Is it normal leaching or oxygen pressure leaching? Why prepare zinc or zinc sulfate!
Zinc is problematic in the sense that zinc ferrite and zinc silicate are two forms of zinc from which little to no leaching occurs
Mainly, some of the zinc turned into zinc sulfide
Ten points of sulfur is not considered high levels of sulfur either. Could the original poster explain the leaching process?
We produce zinc monoxide, which is sold to zinc electrolysis plants. The leaching rate I’m referring to is the one determined through laboratory tests
We produce zinc hydrosulfide, which is sold to zinc electrolysis plants. By leaching rate, I mean the value determined through laboratory tests. Our leaching rate is not high, but the leaching rate after surface cooling is over 90%; however, it drops significantly after passing through the fabric bags