- 업종: Government; Labor
- Number of terms: 77176
- Number of blossaries: 0
- Company Profile:
A professional who controls charging machine to charge open-hearth furnaces with materials, such as limestone, pig iron, and metal scrap. Respnsibilities include:
* Moves controls to engage arm of charging machine in slot of charging box.
* Pushes levers to position charging machine at door of furnace, to thrust box through door, and to rotate arm, dumping contents of box on furnace floor.
* Withdraws empty box, disengages arm, and moves to next furnace to repeat process.
* May charge furnace with molten metal and be designated Hot-Metal Charger.
Industry:Professional careers
A professional who assists first helper to melt and cast iron and steel in open-hearth furnaces. Respnsibilities include:
* Cleans furnace tapholes, using scraper and oxygen lance.
* Closes furnace tapholes with pipe, chrome ore, dolomite, or magnesite to prevent loss of molten metal, and relines steel runners.
* Weighs additives, such as fluorspar, lime, and manganese, and trucks them to furnace areas.
* Shovels refractory materials into furnace.
* Assists crew in slagging or flushing furnace.
* Starts furnace by igniting gas, using torch.
* Performs other duties as described under helper master title.
Industry:Professional careers
A professional who assists first helper to melt and cast iron and steel in open-hearth furnaces. Respnsibilities include:
* Cleans furnace tapholes, using scraper and oxygen lance.
* Closes furnace tapholes with pipe, chrome ore, dolomite, or magnesite to prevent loss of molten metal, and relines steel runners.
* Weighs additives, such as fluorspar, lime, and manganese, and trucks them to furnace areas.
* Shovels refractory materials into furnace.
* Assists crew in slagging or flushing furnace.
* Starts furnace by igniting gas, using torch.
* Performs other duties as described under helper master title.
Industry:Professional careers
A professional who performs any combination of following tasks to charge smelting furnaces with aluminum scrap and ingots, and other nonferrous metals, as well as ore, coke, flux, and other materials. Respnsibilities include:
* Moves levers to open and close furnace doors and to pour specified materials into furnace.
* Moves controls of charging machine to lift, insert, and dump materials into furnace, or shovels materials into furnace, using hood shovel.
* Draws samples of molten metal from furnace for laboratory analysis.
* Reviews laboratory report to determine that smelting is within specified standards, and computes types and amounts of materials to add to furnace to correct smelting, using calculator.
* Rakes dross or flux from furnace, using skimming tool.
* Maintains production records of materials charged into furnace.
* May weigh out specified amounts of materials to be charged into furnace, using scale.
* May operate industrial dump or lift truck to transport, hoist, and dump scrap or refined aluminum into charging machine or furnace.
* May operate bucket loader to hoist, convey, and dump aluminum ore, coke, and flux into hopper of smelting furnace.
Industry:Professional careers
A professional who performs any combination of following tasks to charge smelting furnaces with aluminum scrap and ingots, and other nonferrous metals, as well as ore, coke, flux, and other materials. Respnsibilities include:
* Moves levers to open and close furnace doors and to pour specified materials into furnace.
* Moves controls of charging machine to lift, insert, and dump materials into furnace, or shovels materials into furnace, using hood shovel.
* Draws samples of molten metal from furnace for laboratory analysis.
* Reviews laboratory report to determine that smelting is within specified standards, and computes types and amounts of materials to add to furnace to correct smelting, using calculator.
* Rakes dross or flux from furnace, using skimming tool.
* Maintains production records of materials charged into furnace.
* May weigh out specified amounts of materials to be charged into furnace, using scale.
* May operate industrial dump or lift truck to transport, hoist, and dump scrap or refined aluminum into charging machine or furnace.
* May operate bucket loader to hoist, convey, and dump aluminum ore, coke, and flux into hopper of smelting furnace.
Industry:Professional careers
A professional who tends furnace that remelts nonferrous alloyed metals used in diecasting process. Respnsibilities include:
* Shovels specified proportions of scrap metal and ingots into furnace.
* Sprinkles fluxing compound on molten metal to bring impurities to surface.
* Skims slag from surface of molten metal, using hand strainer.
* May transfer molten metal from furnace to bull ladle, using hand ladle.
* May convey molten metal in bull ladle along overhead monorail, and pour metal into retainer of diecasting machine.
* May pour molten metal into sand molds, using power hoist.
* May clean furnaces and equipment.
Industry:Professional careers
A professional who tends equipment that produces aluminum powder from molten aluminum. Respnsibilities include:
* Installs ceramic tube in furnace and positions air nozzle and power collection duct as specified.
* Taps furnace to allow molten aluminum to flow through ceramic tube where it is transformed into powder by blast from air nozzle and blown into powder collection duct.
* Observes flow of metal and adjusts air nozzle to regulate fineness of powder.
* Sifts powder sample through series of sieves and weighs contents remaining in each sieve to estimate quantity of each grade of powder.
Industry:Professional careers
A professional who tends battery of reduction pots that smelt aluminum oxide into aluminum. Respnsibilities include:
* Adds specified amounts of oxide to pots from overhead hopper, at designated time intervals, and rakes oxide over crust formed by cooling of bath.
* Observes gas flames breaking through crust, and rakes oxide or pieces of crust over flames to prevent damage to anode.
* Watches warning lights and notes color of electrolyte (solution), and breaks up crust to add oxide to bath, using crowbar or pneumatic crust-breaking machine.
* Stirs bath to eliminate gas, using rake.
* Observes instruments and turns rheostat, or repositions anode in bath, to increase or decrease current flow and regulate temperature of solution.
* May train workers in operation of reduction pots.
Industry:Professional careers
A professional who tends battery of reduction pots that smelt aluminum oxide into aluminum. Respnsibilities include:
* Adds specified amounts of oxide to pots from overhead hopper, at designated time intervals, and rakes oxide over crust formed by cooling of bath.
* Observes gas flames breaking through crust, and rakes oxide or pieces of crust over flames to prevent damage to anode.
* Watches warning lights and notes color of electrolyte (solution), and breaks up crust to add oxide to bath, using crowbar or pneumatic crust-breaking machine.
* Stirs bath to eliminate gas, using rake.
* Observes instruments and turns rheostat, or repositions anode in bath, to increase or decrease current flow and regulate temperature of solution.
* May train workers in operation of reduction pots.
Industry:Professional careers
A professional who tends melting kettle to remelt metal scrap, dross, and skimmings to recover lead, cadmium, zinc, or other nonferrous metals and cast it into pig molds for reuse. Respnsibilities include:
* Charges kettle manually or using shovel or hoist.
* Ignites burner to melt and heat metal.
* Observes thermometer or color of molten metal and adjusts temperature control or turns valve to adjust fuel supply to obtain pour temperature.
* Stirs and skims molten metal, using bar and skimming tool.
* Drains, ladles, or pumps metal into molds.
Industry:Professional careers
