... coal ,fly ash,mine dust,metallurgy slag ,sand,and concrete,etc. wear resisting pipe1. steel-corundum ceramic composite pipe for ... mining, metaullurg industry, etc.2. Inner hardened pipe are used for concrete pumping.High frequency and heat treatment process makes the ... high chromium alloy iron by centrifugal casting process are used for coal fired power plant, steel and iron metallurgy plant,cement ...