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The impeller, casing, liner, throatbush, and other components in contact with the slurry in a metal slurry pump are typically the primary wear parts. Their service performance depends not only on the metal materials, but also on particle characteristics, pump speed, duty point, and pipeline conditions.

Before material selection, the following should be confirmed: primary particle composition; particle hardness; maximum particle size; whether particles are sharp;

slurry solid content and density; medium temperature; pH value and corrosiveness; pump operating speed; daily operating hours.

High-hardness materials are not necessarily suitable for all operating conditions. If the medium contains large particles and strong impact, the material's impact resistance must be considered alongside its wear resistance; if the medium is also corrosive, both wear and corrosion must be comprehensively evaluated.

To reduce unnecessary wear, the pump should be operated within a reasonable operating range as much as possible. Long-term low-flow operation, pipeline blockages, abnormal impeller clearances, slurry concentration variations, or poor suction conditions can all lead to localized wear, vibration, and reduced efficiency.

It is recommended to periodically record: flow rate and pressure; motor current; vibration and noise; replacement dates of wear parts; operating hours; photos of removed components; and changes in slurry conditions.

These records can be used to assess wear trends, optimize maintenance intervals, and plan spare parts inventory. When abnormal wear occurs, do not merely replace the parts; also check whether the pump's duty point, piping, and medium conditions have changed.