NEW RECYCLING METHOD FOR GRINDING SLUDGE FROM THE PRODUCTION OF PERMANENT MAGNETS (ALNICO)

1 KANIA Harald
Co-authors:
1 NOWACKI Krzysztof
Institution:
1 Silesian University of Technology, Faculty of Materials Engineering and Metallurgy, Katowice, Poland, EU, 1harald.kania@polsl.pl
Conference:
27th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 23rd - 25th 2018
Proceedings:
Proceedings 27th International Conference on Metallurgy and Materials
Pages:
136-142
ISBN:
978-80-87294-84-0
ISSN:
2694-9296
Published:
24th October 2018
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
38 views / 17 downloads
Abstract

In the grinding process of steel products, considerable amounts of grinding dust are generated, polluted with coolant (oil, oil emulsions), and non-metallic material from abrasive (silicon carbide, aluminum oxide and others). Grinding sludge generated as a result of this mechanism is a valuable source of post-industrial waste containing, apart from iron, such alloying elements as: cobalt, nickel, copper, tungsten, molybdenum, and vanadium. Considering the metallurgical value of grinding sludge, a method for recovering these elements from the sludge has been developed. The article presents a recycling method in a three-stage technological process consisting of sludge de-oiling, sintering, and re-melting in an electrical furnace.

Keywords: steel, grinding dust, new recycling method
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