Slurry wear properties of pump lining materials
Wear, 210 (1):
211-219 (1997)DOI: https://doi.org/10.1016/S0043-1648(97)00055-0
Abstract
In order to study the slurry wear properties of elastomeric lining materials for sand, sludge and sewage pumps, several tests were carried out under various test conditions with a slurry jet device and prototype pump. Preliminary tests were done with 13 materials including polymers, metals and ceramic coatings. Polyurethane, fluid elastomer and rubber showed good wear resistance compared with the hard metals, and were examined in detail. The test conditions were as follows: jet velocity v (8–25 m s−1), impingement angle α(10°−90°), mean diameter of silica sand d (42–415 μm), and sand concentration by weight c (0.1–7 wt.%). The slurry wear rates of the polyurethane and the fluid elastomer were maximum at the impingement angle of approximately 30°. The rubber showed almost the same wear rate regardless of impingement angle. The slurry were rate increased according to a power law of the jet velocity above a critical velocity and sand concentration. As the particle size increased above a critical size at the same weight concentration, the wear rate first increased but then decreased. The influence of impingement variables and particle variables observed using both test methods shows a similar tendency for each lining material, so the slurry wear loss can be described with a single empirical equation. Comparing the slurry wear resistance of three lining materials, the polyurethane showed the lowest resistance because it contained many pores which were produced during the lining process. The rubber showed the highest slurry wear resistance which is probably related to its high tear strength.