Industrial experiences of bending fatigue strength in table liner for cement mill

Abstract

A B S T R A C T Atable liner for the vertical roller mill has been used to grind natural limestone. Unexpected fatigue failure accidents have occurred during portland cement manufacturing process. The design life of a table liner is 4 × 10 7 cycles, but the actual fatigue life of a table liner is 2 × 10 6 to 8 × 10 6 cycles. The fatigue crack of a table liner initiates from the outside edge of the grinding path of the limestone. When such a crack occurs, the table liner has to be replaced, and this requires 30% of the total maintenance cost of the vertical roller mill. Therefore, this study examines the fatigue failure of a table liner by plane-bending fatigue test, stress measurement test, finite element analysis and fatigue fracture analysis.

Summary of intelligent fault diagnosis technology for vertical mills

“…S-H BAEK et al [19] focused on the failure and wear patterns of the worktable liner of vertical roller mills. Due to an unexpected fatigue failure accident during the production of Portland cement, the workbench liner cracked before reaching its design life, resulting in failure.…”