Definition:
Mineral and stone processing plant operators operate and monitor machinery and equipment for processing rocks, minerals and stone to recover refined products for immediate use or further processing.
Tasks include:
(a) setting up and operating stationary plant and machinery which grind, crush, cut, saw and slice rocks, minerals and stones according to the specifications for the job;
(b) positioning blocks and slabs of stone onto machines for sawing, cutting and further working;
(c) monitoring and maintaining the flow of unprocessed rocks, minerals and stones from conveyors into machines;
(d) operating washing, separating, leaching, precipitating, filtering, extracting and combining equipment to remove waste material and recover minerals;
(e) combining mineral ores with solvents to facilitate further processing;
(f) separating metal and mineral concentrates from ore and alluvial deposits by thickening, flotation, gravity separation, filtration, and or magnetic and electrostatic separation;
(g) observing meters, gauges and control panels, and adjusting valves and controls to ensure the safe and efficient operation of equipment, and detecting malfunctions, and assisting with plant and machinery maintenance and repair;
(h) examining processed materials visually or with hands to ensure compliance with established standards and job specifications, and collecting samples for testing in laboratories;
(i) recording information about processing completed during shifts, such as quantities, types and dimensions of materials produced;
(j) sorting, stacking and moving processed minerals and stone for packaging, further processing or shipping.
Job Description: 1) Assists ABRASIVE MIXER in mixing ingredients to form polishing and buffing compounds by performing any of following duties: Dumps specified ingredients in mixing machine. 2) Turns valve to drain finished mix from machine. 3) Transports supplies and products between plant locations, using handtruck. 4) Performs other duties as described under HELPER Master […]
ABRASIVE-MIXER HELPER Read More »
Job Description: 1) Dumps abrasives into pebble mill, connects hose from mill to agitator tank, and shovels graded abrasives from vats. 2) . 3) Dumps specified abrasive, such as flint, garnet, emery, or corundum into container on machine.
ABRASIVE-GRADER HELPER Read More »
Job Description: 1) Tends machine that mixes abrasive compounds for use in making polishing and buffing wheels, and hones: Calculates amount of grit, clay, and adhesive required according to formulas. 2) Weighs out ingredients, dumps ingredients into mixing machine, and starts mixing machine. 3) Feels mixture and adds water and resins until specified consistency is
Job Description: 1) Tends machine that faces and grinds specified radii on abrasives: Sets machine guides to regulate angle of feed of abrasive to grinder. 2) Places abrasive in fixture and manually feeds abrasive to grinding wheel, or starts machine that automatically feeds abrasive against grinder. 3) Inspects abrasives for conformance to specifications, using fixed
Job Description: 1) Operates pebble mill to grind emery, rouge, and other abrasives and separates them according to fineness by water suspension method: Examines abrasive under microscope to determine grinding time required, and grinds abrasive in pebble mill. 2) Turns valve to allow ground particles and water to flow into agitator tank. 3) Presses button