- Industry: Government; Labor
- Number of terms: 77176
- Number of blossaries: 0
- Company Profile:
A professional who operates pebble mill to grind emery, rouge, and other abrasives and separates them according to fineness by water suspension method. Respnsibilities include:
* Examines abrasive under microscope to determine grinding time required, and grinds abrasive in pebble mill.
* Turns valve to allow ground particles and water to flow into agitator tank.
* Presses button to start agitator which stirs particles into suspension.
* Stops machine and determines by microscopic examination when particles of particular grade have settled below tank outlet.
* Opens stopcock to allow particles remaining above the outlet to descend into vat.
* Repeats separation process for other grades, regrinding as required.
Industry:Professional careers
A professional who operates concrete, asphalt, or sand and gravel plant to batch, crush, or segregate materials used in construction. Respnsibilities include:
* Moves controls on panelboard or control board to heat, dry, and mix ingredients, such as asphalt, sand, stone, and naphtha, to produce asphalt paving materials; to weigh and mix aggregate, cement, and water to produce concrete; or to control feeding, crushing, and sifting machinery in sand and gravel plant.
* Observes gauges, dials, and operation of machinery to ensure conformance to processing specifications.
* May repair machinery, using handtools, power tools, and welding equipment.
* May be designated according to type of plant operated as asphalt-plant operator; concrete-batch-plant operator; sand-and-gravel-plant operator; or according to machine function as crusher operator.
Industry:Professional careers
A professional who operates machine to mix or recondition molding sand. Respnsibilities include:
* Weighs out specified amounts of ingredients, such as sand, sea coal, and bonding agents, and shovels them into machine or automatic hopper.
* Sets dials for specified amounts of water, core oil, and other ingredients that are automatically measured and fed into machine.
* Turns dials to time mixing cycle of machine.
* Removes sample of sand and feels sand for consistency.
* Adjusts controls and adds ingredients to vary mixture according to sampling.
* May be designated according to purpose for which sand is to be used as core-sand sand-mill operator; facing-sand sand-mill operator; molding-sand sand-mill operator.
Industry:Professional careers
A professional who transports, mixes, and charges specified quantities of clay into dry-pan hoppers, using overhead crane, equipped with clamshell, or lift-scoop tractor. Respnsibilities include:
* Reads production schedule to determine proportions of various clays needed for scheduled products.
* Transports specified amounts of clays from storage piles to mixing area and mixes clay by filling clamshell or scoop with clay and dumping clay back on pile.
* Transports mixed clay to dry-pan and charges it into hoppers.
* Lubricates equipment, using grease gun and oilcan.
* May press switches or buttons and turn dials and knobs to start and stop equipment used to pulverize, screen, and convey materials.
Industry:Professional careers
A professional who transports, mixes, and charges specified quantities of clay into dry-pan hoppers, using overhead crane, equipped with clamshell, or lift-scoop tractor. Respnsibilities include:
* Reads production schedule to determine proportions of various clays needed for scheduled products.
* Transports specified amounts of clays from storage piles to mixing area and mixes clay by filling clamshell or scoop with clay and dumping clay back on pile.
* Transports mixed clay to dry-pan and charges it into hoppers.
* Lubricates equipment, using grease gun and oilcan.
* May press switches or buttons and turn dials and knobs to start and stop equipment used to pulverize, screen, and convey materials.
Industry:Professional careers
A professional who controls machine equipped with cutting disks to mix binder and sand, and aerate sand used in construction of foundry molds and cores. Respnsibilities include:
* Sprays water over sand on foundry floor and adds binder (clay, flour, or molasses) to sand.
* Starts machine and steers it back and forth through pile to mix water, binder, and sand.
* Rubs sand through fingers to test cohesiveness of mixture and adds water or binder to sand to obtain mixture of desired consistency.
Industry:Professional careers
A professional who tends auxiliary equipment such as pumps, motors, and conveyors to supply materials and power to slurry tanks and other equipment to mix cement slurry for kilns. Respnsibilities include:
* Receives signal from rotary-kiln operator and starts pumps and conveyors to feed raw materials into kiln.
* Opens valves to fill slurry tanks with specified amounts of water and raw materials or to correct slurry mixture.
* Starts tank agitators that mix slurry.
* Greases and oils equipment.
* May be designated according to equipment tended as kiln feeder; mixer tender.
Industry:Professional careers
A professional who tends crushing machine that crushes and washes cullet (waste glass) for use in manufacturing glass. Respnsibilities include:
* Starts conveyor that transfers cullet from storage to crushing machine.
* Starts machine and observes its operation to determine whether cullet is ground to specified fineness.
* Starts water spray to wash crushed cullet.
* Inspects crushed cullet for foreign matter such as stones, bottle caps and neck rings.
* Directs flow of crushed cullet to specified bins by color and type of glass.
* May transfer cullet to and from crusher, using industrial truck.
* Workers who unload bulk ingredients from railcars and truck and tend crushers may be designated batch unloader.
Industry:Professional careers
A professional who tends one or more grinding mills to pulverize mica. Respnsibilities include:
* Fills hopper of mill with mica, using tractor equipped with scoop.
* Opens hopper gate to start flow of mica into mill and turns valve to admit specified amount of water into mill.
* Starts mill to grind mica for specified length of time.
* Feels sample of mixture and adds water to mill to maintain slurry-like consistency.
* Circulates water through mill at end of grinding cycle to flush ground mica from mill, through intermediate tank, and into settling tank.
* Shovels oversize mica from bottom of intermediate tank back into mill.
Industry:Professional careers
A professional who tends mill that pulverizes phosphate rock used in making fertilizer. Respnsibilities include:
* Starts conveyor that feeds rock to mill.
* Moves lever of feedgate to increase or decrease amount of rock fed to mill, according to grinding sound or ammeter readings.
* Applies preservative to belts and lubricates machine.
Industry:Professional careers
