A professional who tends furnace that heats perlite to expel volatile material and reduce ore to powder (calcine) for use as insulating material, plaster, and concrete aggregate. Respnsibilities include:

• Dumps pulverized perlite onto shaker screen that sifts perlite to specified fineness.
• Starts conveyor that feeds screened material into furnace.
• Shovels calcined perlite into sack or fills sack by holding it under discharge hopper.