a. Science: - categorize groups other residues have different origins as a basis for the recycling of waste from electroplating reasonable. In particular note the following issues: + Residues containing mainly electroplating Ni, Cr, Fe, then immediately apply hydrometallurgical processes eliminate impurities Cr, Fe by weak alkaline nickel content if > 5%. Waste residue remaining after solvent extraction or bauxite residue ≤5% nickel content, the continued application process for smelting refining fire to recover the radical ferro heavy metals. + Electroplating waste residue containing more heavy metal elements such as Cu, Zn is necessarily apply hydrometallurgical process for separating air max recovered them. Waste solvent extraction residue is then continued application process for smelting refining fire to recover the radical ferro heavy metals. - Completing the hydrometallurgical process solvent extraction residue, which apply effective way to remove impurities Cr, Fe, Cu, Zn to clean or service creates recovery of nickel sulfate in the preparation of the electrolyte material. - Suggest finishing process stages are recycled electrolyte after the cycle electrolysis using oxalic acid precipitation of nickel ion and nickel oxalate processing the electrolyte are high purity for reuse. - Improving manufacturing processes form the cathode mixture to foam SLS-1 reduced the humus sludge generated during electrolysis. - Completing the electrolytic process according to the plans connected to the anode and cathode electrodes, ensuring basic investment costs for electricity distribution system (mainly plant-level line 10 times cheaper than its supply lines under principle of parallel connection). At the same time simple operating procedures and ensure effective. - Completing the process of waste generated by the process. - Selection is approximately 3 material system CaO - SiO2 - Al2O3 suitable for smelting residues into ferro chrome nickel alloy. - Determining the influence of agents to efficiently and quality of products smelting. - Construction process of ferro smelting residues - Already registered intellectual property ferro nickel smelting process residues from electroplating and accepted applications. b. production testing: - Apply hydrometallurgical process technology has been perfected to produce 3025 kg of nickel electrolyte purity> 99% from 100 tons of fresh residues - Application of fire training process technology has been developed to produce 15,030 kg of ferro chrome nickel quality indicators meet with registration from hydrometallurgical residue after solvent extraction. Some images of the project:   
|