With the development of PCB industry, pouring into the market, many enterprises in PCB production etching, pickling, brush grinding and washing process can produce a large amount of wastewater containing copper, such wastewater caused serious pollution to the environment, to effectively processing, recycling organic copper recycling, waste water meet emissions standards, is the need to study the direction of the industry.
at present, on PCB copper sludge wastewater treatment methods are: 1, solidified sludge landfill treatment;
2, the material of sludge;
3, sludge thermal chemical treatment;
4, metal copper recovery technology in sewage sludge.
Copper in the comprehensive market effect, the sludge recycle is a good solution.
the PCB copper sludge by acid leaching, ammonia leaching first or biological leaching method such as copper leaching from the sludge, and then take the chemical precipitation, ion exchange, electrolysis and solvent extraction method to recycle and elemental or microbial purification method and so on copper or copper salt.
The solvent extraction method with environmental protection, the advantages of quickly and quickly occupied the important status.
Machine adopts the centrifugal extraction solvent extraction of copper waste water recycling, on the one hand, reduce the cost of sludge landfill, incineration disposal;
'Into' on the other hand, to achieve the recycling of copper resources, brought good economic benefit for the enterprise, reduce the enterprise cost, the economic value of the sludge can be fully realized.
in the process of operation, the copper wastewater treatment sludge by acid leaching -
Extraction of copper in the process of sludge resource recycling.
First copper sludge by sulfuric acid leaching of copper, copper leaching liquid and extraction agent according to certain proportion into the centrifugal extraction machine, with the aid of the rotation of the drum, through the impeller the two-phase mixing and dispersing quickly, and complete the mixing and mass transfer process.
After mixing liquid under the action of vortex disk into the rotary drum, in under the action of centrifugal force, two phase fluid fast separation and through different export eduction body, completed two phase separation process, finally through extraction and reverse extraction agent cycle running recycle leaching of copper liquid.