- 업종: Government; Labor
- Number of terms: 77176
- Number of blossaries: 0
- Company Profile:
A professional who supervises and coordinates activities of workers engaged in refining scrap solder and tin and lead alloy with refined scrap to make solder. Respnsibilities include:
* Directs workers in weighing tin, lead, and scrap solder and in refining operations.
* Molds and weighs test piece to compute ratio of tin and lead in refined metal.
* Computes amounts of tin, lead, and refined solder to be used in making solder according to formula.
* Directs workers in melting and mixing metals in melting pot, molding solder, weighing, recording weights, and packing.
* Performs other duties as described under supervisor master title.
Industry:Professional careers
A professional who supervises and coordinates activities of workers engaged in relining aluminum-reduction pots with carbon paste to form cathode.
* Inspects work to verify conformance to standards.
* Trains new workers in job duties.
* Performs duties as described under supervisor master title.
Industry:Professional careers
A professional who supervises and coordinates activities of workers engaged in cleaning and coating molds used to cast steel ingots, and in relining and repairing mold covers (hot tops).
* Performs other duties as described under supervisor master title.
Industry:Professional careers
A professional who supervises and coordinates activities of workers engaged in various duties, such as unloading scrap material from cars, sorting different grades of scrap into piles, burning or shearing scrap to charging-box size, and handling and storing ingots.
* Performs duties as described under supervisor master title.
Industry:Professional careers
A professional who controls electrolysis tanks to purify electrolyte used in copper refining by removing copper, arsenic, and nickel. Respnsibilities include:
* Places lead anodes and copper cathode starting sheets in tanks and turns valves to fill tanks with impure electrolyte.
* Switches on current and starts circulation pumps to remove copper from solution and deposit it onto cathode.
* Pumps solution into high-voltage tank system to deposit arsenic on cathodes.
* Pumps electrolyte from high-voltage tanks into evaporators that concentrate solution to specified specific gravity.
* Turns valves to drain condensed solution into settling tanks and to recover acid after nickel sulfate has settled.
Industry:Professional careers
A professional who controls equipment to purify copper by electrorefining. Respnsibilities include:
* Signals monorail crane operator to lower impure copper anodes into tank filled with electrolyte.
* Immerses copper starter sheets (cathodes) into tank.
* Passes steel rod between electrodes to break off lumps which might cause short circuit and to verify specified clearance between electrodes.
* Examines, cleans, and tightens electrical connections, using steel wool and handtools.
* Turns on electrical current, and verifies voltage, using voltmeter.
* Measures density of electrolyte, using hydrometer.
* Observes deposition of copper on cathodes, and signals monorail crane operator to remove coated cathodes and depleted anodes from tank after specified time.
* Inspects tanks for defects, such as loose connections, leaks, deteriorated suspension bars and fittings, clogged floats, and drainage connections.
* Repairs or replaces parts, or notifies maintenance department.
* May cover lead sheets with primary coat of copper to make cathodes and be designated Starting-Sheet-Tank Operator.
* May operate equipment that purifies copper through electrolysis without anodes and be designated Electro-Winning Operator.
Industry:Professional careers
A professional who tests pulverized material and computes specific gravity, using manometer tube. Respnsibilities include:
* Collects mill samples, weighs specified amount of pulverized material, and pours it into cylinder and taps powder into compact mass.
* Raises mercury level in left side of manometer tube by pumping air into right side, using hand pump.
* Inserts cylinder of pulverized material into top of left tube.
* Releases air pressure from right side and times drop of mercury level in left side, using stopwatch.
* Computes specific surface of material, using standard algebraic formula.
* Reports below-standard reading to mill operator.
* May test milled sample of aluminum alloy to identify metals in sample and be designated Quantometer Operator.
Industry:Professional careers
A professional who mixes ingredients to prepare carnallite flux used in refining magnesium. Respnsibilities include:
* Weighs carnallite ingredients according to formula.
* Mixes ingredients on concrete floor, using shovel.
* Melts mixture in furnace crucible.
* Tilts furnace with handwheel to pour molten carnallite into cooling pans.
* Pulverizes solidified carnallite in grinding mill and shovels powder into metal drums.
Industry:Professional careers
A professional who collects and prepares laboratory samples of metal-bearing ores, refined metals, and other materials, such as coke, cryolite, slag, scrap, or flue dust, by any combination of following methods:
* (1) Collects samples of crushed ore, concentrates, or other material from conveyors, storage bins, carloads, or refining equipment, using sample containers or diverting mechanisms on conveyors or chutes.
** Grinds materials, using grinder mill.
** Weighs, dries, and reweighs material, using scales and oven, and computes moisture content.
** Sifts material through screen to remove oversized particles.
** Places sample in labeled containers, flasks, or bags for laboratory analysis.
* (2) Takes samples of molten metal from furnaces or casting stations, using ladle and wafer mold.
** Stamps or marks identifying information on cast wafer for delivery to laboratory.
* (3) Cuts samples of metal sheet or plate, using shears or punch.
** Saws sample sections from metal castings, plate, or rod for metallurgical analysis, using circular saw.
** Smooths cut surfaces of metal with grinder and sandpaper.
** Etches samples in acid to expose crystalline structure for spectrographic analysis.
** Drills holes in castings to obtain shavings for laboratory analysis.
** Stamps or labels samples for identification.
Industry:Professional careers
A professional who collects and prepares laboratory samples of metal-bearing ores, refined metals, and other materials, such as coke, cryolite, slag, scrap, or flue dust, by any combination of following methods:
* (1) Collects samples of crushed ore, concentrates, or other material from conveyors, storage bins, carloads, or refining equipment, using sample containers or diverting mechanisms on conveyors or chutes.
** Grinds materials, using grinder mill.
** Weighs, dries, and reweighs material, using scales and oven, and computes moisture content.
** Sifts material through screen to remove oversized particles.
** Places sample in labeled containers, flasks, or bags for laboratory analysis.
* (2) Takes samples of molten metal from furnaces or casting stations, using ladle and wafer mold.
** Stamps or marks identifying information on cast wafer for delivery to laboratory.
* (3) Cuts samples of metal sheet or plate, using shears or punch.
** Saws sample sections from metal castings, plate, or rod for metallurgical analysis, using circular saw.
** Smooths cut surfaces of metal with grinder and sandpaper.
** Etches samples in acid to expose crystalline structure for spectrographic analysis.
** Drills holes in castings to obtain shavings for laboratory analysis.
** Stamps or labels samples for identification.
Industry:Professional careers
