Zinc Pressure Leaching Oxygen Pressure Leaching Tank
Zinc Pressure Leaching Oxygen pressure leaching tank
Zinc Pressure Leaching Process(ZPL) is the most advanced Zinc leaching technology in the world. During pressure leaching process, the Zn sulfide in concentrate will be turned into Zn Sulfate conditioned by proper temperature, acid amount and oxygen pressure etc. Then the Zn Sulfate solution will be precipitated and electro-winned to produce Zn; The S in concentrate is turned into elemental S in residue which can be further purified as a S product for sale.
1. Process features
- Wide flexibility of raw materials
- Eco-friendly
- S is transformed into elemental S which will facilitate transfer, storage and sale.
- Pressure leaching action takes place in a closed container with less steam consumption.
- High recovery of other valuable elements.
- Not need a pyro-metallurgical facility like rotary kiln to treat Zn residue
2. Process flow
3. Equipment required
- 3.2m2or larger cathode plate
- Automatic crane/cathode stripping /anode flatten system
- 11m Polymer concrete electrowinning tank and mist control system
- Automatic Zinc melting-casting-stacking-packing system
4. Leaching tank
The leaching tank, which is constructed of carbon steel shell and Acid resistant brick lining, is distributed into 6-8 chambers.
The milled concentrate slurry, with sulphur anti - packing reagent, will be pump into 1# leaching chamber. And the depleted electrolyte will be pump into 1# and 2# chambers. 98% oxygen and steam will be injected into each till oxygen pressure reaches 700kpa.


Unionsum, a subsidiary of CRIMM, provides sustainable system solution for mining and
metallurgy industry, including engineering, procurement and construction, and offers a widerange of
scientific research and consultingservices.
Mining and Metallurgy Experts
History from 1953
Most authoritative and comprehensive organization in China mining and metallurgy industry
2 academicians of China Engineering Academy, 108 professors and 500 senior engineers
50 Laboratories and Pilot Plants (2 state key Labs)
Decades experiences in research and engineering service
Qualifications
Clients Visiting


Contact information
Skype: claire.zhou
M.P: 86-18890384660
Web: http://unionsum.en.china.cn
Add: F3, Yubang Internation Plaza, No.222, Xinyao Road (S),
Tianxin District,Changsha, Hunan, China
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