This note summarizes common material routes for scraper conveyor middle trough base plates used in underground coal mines. Options include carbon/low-alloy steels for general wear, NM-series/Hardox wear-resistant steels for higher abrasion, chromium carbide overlay plates for extreme sliding wear, and ceramic composite liners for low-impact, ultra-abrasive conditions. Selecting by abrasion level, impact severity, and compliance needs helps balance service life and cost.

The wear resistance of the middle trough is a key factor affecting the service life of scraper conveyors. By using wear-resistant steel, applying overlay welding, optimizing structure, and performing proper operation and maintenance, the wear resistance can be significantly improved, ensuring efficient and safe coal mine transportation.