Know-how-

Slag/Dross Recovery

Slag/dross and leaching residue are produced from the process of metal extraction. The commonly-seen slag/dross/residue includes copper dross, lead dross, tin slag, zinc leaching residue, antimony/arsenic dross, cadmium residue/cake, sulfur residue/cake, vanadium slag, nickel slag, iron tailing and iron bearing red-mud waste.

Due to its low concentration, it may be not profitable to extract single metal, so it is usually landfilled. However, the increasing awareness of environment protection requires a safer and better treatment method. Comprehensive recovery of these slag/dross has been emphasized with greater attention.

Metalcess is a professional company offering metal extracting/ recovery/ recycling solutions. We have rich experience in slag treatment. We cater for smelting process to coordinate with clients’ existing operation, achieving safe and comprehensive slag recovery and high ROI.

Recommended Process:

Silver Froth (Parkes Dross) Distillation to separate Silver,Lead & Zinc

Silver foam (also named as silver-zinc crust or silver froth), main content Ag/Zn alloy, is the product of Parkes process when zinc is added to the molten silver-containing lead.
Lead Bullion Fire Refining Process Overview (How to Remove Cu Sn Ag)

Metalcess provides solution on treating copper dross from lead bullion, tin slag from Harris process, silver froth from Parkes process by distillation technology to get high purity copper tin silver and zinc.
Crude Zinc Oxide Dust Recovery

Metalcess offers ammonium leaching + zinc electro-winning to treat high fluorine and chlorine-bearing crude zinc oxide to produce high purity zinc 99.99%.
Hot Dip Galvanizing Slag (Hard Zinc) Recovery

Metalcess provides distillation technology to recycle Hot dip galvanizing slag generated as blue sticky crystal at the bottom of galvanizing pot/kettle, containing impurities like iron and aluminum.
Vanadium Recovery from Fume Dust and Slag

Metalcess provides solution of alkaline process to reduce inclusion of impurities during leaching while ensures relatively high leaching rate. We can produce high quality V2O5 (higher than 99.95%) through simplified and high efficient process flow.

Metal Recycling

Modern technology diversifies people’s lifestyle and also accelerates the generation of all kinds of scraps, for example, the electric and electronics are updated every 1-3 years. Among these scraps, WEEE/PCB, spent lead acid battery, nickel metal hydride battery, lithium-ion battery are of great value and have to be treated in a safe and economic manner.

Metalcess is a professional company offering metal extracting/ recovery/ recycling solution. We provide customer-tailored engineering process and service for medium and small-scale metal recycling projects. Whether standard or non-standard application, we are confident to offer the most optimal solution targeting stable performance, flexible and clean operation and environmental-friendly effects.

Recommended Process:

Copper Scrap Recycling

Metalcess provides high grade copper scrap directly producing hot-rolled electrical grade copper rod, and for low grade copper scrap providing TBRC smelting, copper electrorefining to produce LME-1 copper cathode.
Soldering Tin Recycling

The tin & lead alloy, being soldering tin from WEEE recycling process or the byproduct from spiral finned crystallizer, and tin-containing lead grid from the lead acid battery are required by to remove lead from tin. Vacuum distillation furnace is highly recommended for tin & lead separation.
WEEE/PCB

Metalcess provides two recycling process for different treatment capacity of WEEE/PCB, Recovery rate of precious and rare metal is higher than 97-99%.
Spent Lead Acid Battery Recycling

Metalcess provides full process service covering crushing and separation, lead paste converting and smelting, lead paste solution purification and crystallization, lead grid smelting, refining and casting, treatment capacity from 2t/h -20 t/h are available.
Spent Lithium Battery

Spent lithium battery contains valuable metals, with each representing in mass friction, including 5-10% cobalt, 5-7% lithium, 5-10% nickel, 5-10% copper and 5-10% aluminum, etc. The recovery of spent lithium battery will, especially, mitigate the shortage of cobalt.

Metal Distillation Separation

Metal distillation is the thermodynamics process using the difference of boiling points of metal alloy to separate them from each other. Usually, the metal of low boiling points is evaporated from the liquid alloy and later the vapor is condensed in a separate container. In a distillation system, by setting up condensing elements along the evaporation passage, the metal of high boiling point gets condensed before taking away by the vapor. Consequently, low boiling point metal are purified.

Distillation technology is applied for many industrial sectors to treat scrap/waste generated from industrial production and daily use household, especially favored by high purity product application.

Metalcess is a professional company offering metal distillation technology. Metalcess is specialized in treating waste acid with organics from chemical plant and pharmaceutical factory, lead-tin alloy, silver froth, crude zinc with lead and cadmium, hard zinc with aluminum and iron from hot galvanizing, waste acid with selenium and mercury from acid-making process, and soldering tin from waste electrical and electronic element, etc.

No.	Raw material	Main source	Product A	Product B
1	Silver froth (Pb-Ag-Zn-Bi)	Lead bullion fire-refining process	Rich silver ingot	Crude zinc/ crude Pb-Bi alloy
2	Copper dross (CuS, Pb)	Lead bullion solidification process	Copper matte (Pb≤2%)	Crude lead
3	Anode slime (with Au/Ag)	Copper/lead electro-refining	Dore alloy	Crude Pb-Sb-Bi alloy
4	Soldering tin (Pb/Sn alloy)	WEEE/PCB recycling	High purity tin (99.996%)	High purity lead (99.994%)
5	Cadmium oxides residue/ slag	Zinc electrolyte purification/ spent Cd-Ni battery	Cadmium ingot (99.998%)
6	Crude zinc/ hard zinc	ISP furnace /galvanizing zinc	High purity zinc ingot (99.999%)	High purity zinc powder(99.99%, 2-15μm)
7	WEEE refined alloy	WEEE/PCB refining process	Dore alloy	Crude lead
8	Se/Hg-containing slurry	Sulfuric acid generation plant	Se ingot/powder (99.99%)	Hg (99.99%)
9	Indium residue/dross	Zinc electrolyte purification/ Tin fire-refining process	High purity Indium (Zn/Cd≤0.0010%).
10	Crude Mg	Pidgeon process	High purity Mg

Recommended Process:

Hot Dip Galvanizing Slag (Hard Zinc) Recovery

Metalcess provides distillation technology to recycle Hot dip galvanizing slag generated as blue sticky crystal at the bottom of galvanizing pot/kettle, containing impurities like iron and aluminum.
Silver Froth Distillation Treatment

Silver foam (also named as silver-zinc crust or silver froth), main content Ag/Zn alloy, is the product of Parkes process when zinc is added to the molten silver-containing lead.
Lead & Tin Distillation Separation

Metalcess provides vacuum distillation furnace for tin & lead separation and purification. Raw material can be soldering tin, Pb-Sn alloy and tin-containing lead grid from lead acid battery.