Cobalt is a non-metallurgical metal used for the production of alloys for the ceramics and glass industries (as a pigment). In the paint and lacquer industry, cobalt is also used as a pigment.
Morocco is an important supplier of cobalt for European industries. To enhance productivity and efficiency a new project has been started. To keep up with the demands of the market, facilities for mining cobalt had to be increased.
Some 30 Verderflex peristaltic hose pumps will fulfil an essential role in refining the cobalt for the transfer of sulfuric acid solution (30%) and ammonia (25%) from the storage and dilution tanks to several reactors and baths.
The peristaltic hose pumps will pump these fluids, and especially the sulfuric acid, to rinse the cobalt and eliminate impurities and separate the cobalt from other materials such as nickel, iron and arsenic in the ore.
This stage in the production process is called electrolysis. Electrolysis ensures the cobalt is purer and more concentrated.
The capacity of the peristaltic pumps must be adjusted continuously to the pH value of the mined cobalt. In this way the exact concentration of sulfuric acid for the specific quantity of cobalt is pumped. To achieve this precise dosing automatically, the pump speed is controlled by a frequency control that is driven by a pH meter.
Feed pump for filter press
The process water, left over from the band filtration process, results in a filter cake with residues. The fluids, acid and abrasive, are caught in collection basins. Another Verderflex peristaltic hose pump functions as a feed pump for a centrifuge and a very fine powder is separated from the process waste water.
Tests on pilot-plant level have resulted in the selection of Verderflex peristaltic hose pumps. The simple, very robust construction of the Verderflex peristaltic pump is excellent for the heavy-duty demands of mining.