MARCH-PUMPEN supplies globally active plant builders for battery recycling plants. In total, processing capacities of more than 15,000 tonnes of electric vehicle batteries can thus be returned to the value chain. MARCH-PUMPEN thus actively supports sustainability in environmental protection by contributing to the avoidance of residual battery waste, with the production and supply of patented, chemical-resistant, magnetic-drive gear pumps made entirely of non-metallic materials of the TEF-MAG® series, for metering a wide variety of acids and other highly corrosive liquids.
Pumps used
- TEF-MAG® – chemical-resistant gear pumps made entirely of non-metallic materials for battery recycling
In the process itself, the batteries are first treated mechanically to obtain the so-called black mass, which consists of valuable raw materials such as lithium, cobalt, nickel and manganese. The black mass is then processed further hydrometallurgically using strong acids and other aggressive liquids. The metals are dissolved and separated in a special process.
Very small flow rates of the highly corrosive process liquids of 5–1500 l/h have to be metered with low pulsation at differential pressures of 5 bar or more.
The patented TEF-MAG® gear pump from MARCH-PUMPEN combines the good metering capability of rotary positive displacement pumps, chemical resistance through the use of entirely non-metallic materials, and leak-free operation through the use of magnetic coupling technology.
MARCH PUMPEN pays attention not only to the chemical resistance of the wetted parts. Components that are exposed to the chemically aggressive atmosphere are also specially selected or treated. The pump lantern is made of high-quality EN-GJS-400-15 and wet-painted throughout to corrosion protection class C5 high. The drive motors are also specially designed for the harsh atmosphere. A wide range of options is possible for this, such as the VIK design, special wet paint finishes, stainless steel screws, shaft and nameplates, or even coating and treating the winding packages or the inner casing.
Pump types used
| Casing | PVC and PVDF |
|---|---|
| Shafts | SSiC |
| Gears | PEEK, PVDF and PTFEC |
| Plain bearings | PTFEC and graphite |
| O-rings | FKM and FFKM |
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