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U.S. Department of Labor
Industry: 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
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