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Low shear force and non-pulsating transport
Nickelhütte Aue operates systems in order to extract NE metals, inparticular nickel, cobalt and copper from scrap containing NE metals.The valuable substances gained in this way are returned to thecommercial cycle as metals, concentrates or as compounds. Thesubsidiary elements are bound within a recycling process to produceglass-like slag that is used as a construction material. The plant canlook back on over 150 years of tradition in the production of nickel.
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The starting situation
Until now, magnet-coupled centrifugal pumps had been used in order to transport crystalline, abrasive sludge to a chamber filter press. However, in view of the fact that the medium is exposed to excessive shear force when using this pump type and there is therefore an undesired susceptibility towards precipitation residue being rubbed off, a better solution was targeted.
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The solution
A decision was made to invest in seepex progressive cavity pumps of the BN range, as they transport the medium with low shear force and also practically no pulsation. They transfer crystalline pulp consisting of cobalt sulphate or nickel sulphate in a chamber filter press. After subsequent drying, this yields a high quality, crystalline raw material, used for example in galvanising technology or in the chemicals industry.
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The benefits
Until now, the pumps have worked without difficulty and without any replacement of parts. The nickel smelter has reaped the rewards of this switch to a different pump type and the company is highly satisfied with its decision.
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Key Facts
- Low shear
- Virtually pulsation free
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Significant cost savings
- Low wear
- Improvement in plant efficiency
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