Slurry pumps in the mineral processing industry are parts which erode very quickly. Erosion is predominantly caused by abrasion from fine particles of the ores. Because of this, the erosion process takes place on impeller blades and cover plates by direct contact with the slurry. This paper reports our wear investigations from a practical trial of laser-coated pump parts for the mineral processing industry, based on the conclusions of pre-investigations on model parts like simple plates. Building upon this previous research conducted by the authors, we aimed to determine the best laser coating powder system to extend the useful lifetime of specific laser-coated pump parts within the real industrial environment. In addition to one laser-treated cover plate, three blades of a 4-blade slurry pump impeller were treated with different laser powder coatings to compare the wear behavior in the industrial setup, with the uncoated fourth blade, after 19 days of operation. During this real-life trial, each powder system performed differently. The laser coatings were worn away in two general directions. The first direction was along with the blade pattern, but the second wear direction was from the center of the impeller to the direct blade surface. Partial surface cladding led the material to wear away faster than complete surface cladding due to perpendicular force. Based on these results, in order to use material hardness and wear resistance for higher efficiency, all surfaces need to be covered with different thicknesses, depending on the wear rate of the part. This study also showed that the powder system based on angular-shaped cast tungsten carbide was the most suitable coating material for this type of slurry pump.