A professional who tends equipment that separates crushed ore into sands (coarse particles) and slimes (fine particles), preparatory to concentration of metal. Respnsibilities include:

• Starts equipment, and regulates flow of crushed ore, water, and flotation reagent into classifiers which separate coarse particles by raking mechanism or swirling action of water while fine particles are carried off in overflow.
• Observes meter indicating alkalinity of slime, and adds lime solution, as necessary.
• Removes sand to prevent clogging by flushing or pulling lever on classifier to dump it.
• May lubricate machines.
• May replace defective parts, using handtools.
• May be designated according to type of classifier used as Cone-Classifier Tender.