Molten zinc and lead anodes (zinc electrowinning)

During the zinc electrolysis, insoluble oxy-sulphates (i.e. Lead- & calcium-sulphate and Manganese di-oxide) can be formed at the Lead- anode surface ; part of it falls down in the cells another part sticks to the Lead-anode surface and is separated during the anode-cleaning steps. The Pb.Mn.cellmud is regularly collected from the bottom of the cells and from the anode-cleaning devices, is washed and filtered.  The ‘Pb Mn cellmud’ is a lumpy wet filtercake with an average Lead-content of 20-30% w/w and is typically used in production units of Lead metal (EC 231-100-4) or Lead compounds and recovery of precious metals.
 Transfer of the Pb-Mn cellmud occurs in big-bags or containers or covered bulk load trucks, according to applicable regulation. The ‘Pb Mn cellmud’ is unloaded from transport trucks, ADR-big-bags or containers ..and transferred to storage silo’s through especially designed transfer units. The ‘Pb Mn cellmud’ is optionally blended with other Lead-containing primary or secondary materials. The mixture is continuously fed to smelting furnaces (i.e. ISA, Blast furnace, ISF, ...) or similar for further smelting extraction of lead and lead compounds, and precious metals.

Slimes and Sludges resulting from zinc electrolytic refinining processing mainly consists of lead and manganese sulfates. 

min (% w/w)