Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
HVOF-SPRAYED COATING AGAINST WEAR OF SLURRY PUMP ROTORS AND TAILINGS FOR THE COAL MINING INDUSTRY
Submission Author:
Elvys Isaias Mercado Curi , SC
Co-Authors:
Milton Pereira, Richard de Medeiros Castro, Fábio Peruch, Vitor Gustavo Alves
Presenter: Vitor Gustavo Alves
doi://10.26678/ABCM.COBEM2023.COB2023-2383
Abstract
Separating the coal from the refuse, which is often accomplished using a cyclone, is a crucial stage in the processing of mineral coal. With a relative density of 1.8 to 1.9, the fragmented and pre-concentrated mineral is transports by the slurry pump to the inside of the cyclone. The slurry pump rotor typically lasts 30 days, during which time the substrate material must be partially recovered and completely coated. Surface coatings are a good way to improve rotor wear reduction. These coatings improve abrasion resistance and are used more often to lessen surface degradation brought on by abrasive and erosive wear. In order to compare the coating used in a coal mining industry to that used on stainless steel AISI 316 rotors coated with WC-10Co-4Cr and WC-10Ni using the high velocity oxygen fuel (HVOF) spraying method, the primary goal of this study is to examine the tribological behavior of these coatings through field testing. To evaluate the tribological performance of these alloys in situ in the coal processing facility with a capacity of 70 t/h, two rotors were produced. The key finding was that, in comparison to the rotor coated with silicon carbide (SiC), the wear rates on the WC-10Ni and WC-10Co-4Cr coatings were reduced, with WC-10Ni standing out. Material removal was seen by scratching at the rotor outlet while minor delamination was found in other places when examining the abrasion processes beneath the coatings and substrate. Another important observation was that when exposed to abrasion in the slurry pump, the samples lost a substantial amount of volume as a result of erosive wear.
Keywords
Erosive Wear, Abrasive wear, HVOF, WC
