- المجال: Government; Labor
- Number of terms: 77176
- Number of blossaries: 0
- Company Profile:
A professional who tends oil-fired, rotary, magnetic drier that removes oil and iron from aluminum-scrap turnings. Respnsibilities include:
* Ignites burner, and adjusts mixture of oil and air to obtain desired temperature.
* Starts drier, and turns on current to remove iron magnetically.
* Signals workers to load scrap into drier, and regulates rate of feed in accordance with oil content of scrap.
* Places wheelbarrow at discharge end of drier to receive processed turnings.
* Weighs filled wheelbarrow, records weight, and dumps load onto pile.
Industry:Professional careers
A professional who tends iron launders that precipitate copper from solution. Respnsibilities include:
* Signals overhead crane operator to load launders with shredded tin cans (iron).
* Starts pumps and turns valves to regulate flow of solution through series of launders to ensure maximum precipitation of copper.
* Measures copper content of solution at various stages of processing by titration tests.
* Adds iron to launders to maintain maximum recovery of copper.
* Excavates precipitated copper from launders and cleans tanks.
* Keeps record of titration tests.
Industry:Professional careers
A professional who controls equipment to leach out metal from ore in solution. Respnsibilities include:
* Weighs sample of solution and evaporates moisture from it, using heater.
* Reweighs sample to determine percentage of solid material in solution.
* Siphons water from solution to obtain specified concentration, following chart.
* Turns valves to feed chemicals, such as cyanide or acid, into tank of ground ore or filtered slime.
* Starts mechanical agitators and observes percolation of solution to ascertain dissolution of ore.
* Tests solution with hydrometer to determine degree of ore concentration.
* Obtains sample of solution for laboratory analysis.
* May supervise workers in loading and excavating leaching tanks.
* May tend filtering machine to separate fluids from metal.
* May tend pumps to force ground ore and solution into or from tanks.
* May lubricate equipment and clean tank with water hose.
* May heat solution in tank with steam and add premeasured amounts of solid materials, such as manganese.
* May be designated according to ore leached as Molybdenum-Leaching-Plant Operator.
Industry:Professional careers
A professional who tends equipment that pumps aluminum hydrate from secondary thickeners through wash tanks to storage tanks. Respnsibilities include:
* Turns valves to regulate amount of hydrate flowing into thickeners and washing tanks to maintain specified density of hydrate.
* Adjusts valves and pumps to transfer hydrate from secondary thickeners through wash tanks into seed storage tanks.
* Tests sample of hydrate to determine its density, using hydrometer.
* Lubricates valves and adjusts packing glands to prevent leaks.
* Keeps operating log.
Industry:Professional careers
A professional who assists top-precipitator operator in precipitating aluminum hydroxide from rich liquor. Respnsibilities include:
* Opens valves and starts pumps to fill precipitators according to schedule and to add specified seed charges to tanks as directed, using levelometer to determine amount of seed added.
* Raises and lowers circulating lines, using electric hoist.
* Drops metal weights from tops of tanks to break scale and crust formations in empty tanks.
* Lubricates valves and adjusts packing glands to prevent leaks.
* Examines precipitator tanks for adequate circulation and empty tanks for cleanliness.
* Performs other duties as described under helper master title.
Industry:Professional careers
A professional who controls equipment that separates mud from alumina liquor and recovers soda from mud. Respnsibilities include:
* Pumps thickened mud to washers and turns valves to regulate flow of water into washers.
* Turns valves to release specified amount of mud into washers to maintain sludge balance.
* Turns valves to pump sediments from washer into earthen thickeners.
* Opens valves to introduce starch into mud settlement and to regulate flow of milk of lime at specified rates.
* Lubricates valves and adjusts packing glands, using grease guns and wrench.
Industry:Professional careers
A professional who empties slurry from precipitator tanks as directed by top-precipitator operator. Respnsibilities include:
* Starts and stops pumps to transfer slurry to thickener tanks.
* Adjusts valves to control rate of discharge of slurry and to maintain required level of mixture in equalizer tanks.
* Removes barrel flanges, using handtools.
* Cleans precipitator barrels and screen boxes, using hose and cleanup tools.
* Cleans airline of precipitator tank, using metal rod.
* Lubricates valves and adjusts packing glands to prevent leaks.
Industry:Professional careers
A professional who assists clarifier operator in separating mud from alumina liquor and in recovering soda from mud. Respnsibilities include:
* Turns valves to flush lines.
* Turns valves to divert flow of alumina liquor through standby equipment as directed by clarifier operator.
* Reads tank gauge and records sludge levels of mud settlers and washers.
* Takes sample of mud sediments and weighs it to determine density.
* Lubricates valves and adjusts packing glands to prevent leaks, using grease gun and wrench.
* Cleans screen boxes.
* Performs other duties as described under helper master title.
Industry:Professional careers
A professional who collects and tests samples of copper-ore slurries. Respnsibilities include:
* Draws samples from processing tanks or vats at specified times and locations, and labels containers with identifying data.
* Weighs samples, compares color against chart, and measures acidity or alkalinity, using pH meter.
* Records test results on product-control forms.
* Observes equipment during rounds to detect malfunctions, and notifies filter-plant supervisor of irregularities.
Industry:Professional careers
A professional who operates dust-collecting equipment in crushing department of copper refinery to recover dust from ore. Respnsibilities include:
* Starts feed conveyors, suction fans, impellers, and electrodes, and moves controls to regulate dampers, equalizing ports, and water eliminators.
* Turns valves to fill and maintain level of water in tanks.
* Observes operation of equipment and filling of collected dust in hoppers to ensure efficient operation.
* Inspects and cleans water eliminators, impellers, hopper walls, air chambers, fan housings and wheels, safety switches, and water-level control devices, using water and airhose.
* Removes and cleans strainers in waterlines.
* Adjusts and tightens belts on motors or pulley wheels to maintain tension, using handtools.
* Lubricates motors and exhaust bearings.
Industry:Professional careers
