- 업종: Government; Labor
- Number of terms: 77176
- Number of blossaries: 0
- Company Profile:
A professional who tends machine that forces mortar into spaces between firebrick and steel shell of taconite ore furnace. Respnsibilities include:
* Inspects furnace to detect discoloration spots which indicate flaws in firebrick inner wall of furnace.
* Shovels grout into reservoir of machine.
* Attaches airhose to compressed air system and grout hose to nipple on shell of furnace with wrench.
* Starts machine and observes pressure gauge to determine when space is filled.
* Caps nipple welded onto furnace shell, using wrench.
* May mix mortar, using electrically driven paddle wheel.
* May dismantle and clean grout machine and equipment, using wrenches, water, and airhoses.
Industry:Professional careers
A professional who tends oil-fired kettles that melt and fume antimony to make antimony oxide. Respnsibilities include:
* Charges antimony crystals into melting kettle with hoist, and fires burners.
* Regulates temperature according to thermometer readings and color and appearance of metal.
* Skims slag from surface of kettle.
* Connects trough from melting to fuming kettle, and pours metal into trough by tilting kettle.
* Heats metal to specified temperature to vaporize antimony which is drawn to baghouse and condensed as oxide dust.
* Fills buggy with antimony oxide from hoppers, and weighs filled buggy on floor scale.
* Empties buggy onto conveyor leading to rotating drum in which oxides from different charges are blended.
* Transfers blended dust to conveyor leading to automatic bagging machine.
* Determines antimony content by casting sample into rod of specified size, weighing it, and referring to standard chart.
Industry:Professional careers
A professional who tends series of oil-fired kettles that refine lead. Respnsibilities include:
* Charges kettle with lead in molten or pig form, and fires kettle.
* Adds specified type and amount of reagent and agitates mixture to cause impurities, such as antimony, arsenic, bismuth, and tin to form into dross.
* Skims dross off mixture, using ladle, shovel, or perforated dipper.
* Throws zinc bricks into kettle and agitates mixture to desilverize lead.
* Skims crust of silver and gold content into basket of press, and compresses dross with air-driven ram.
* Pumps lead through reaction cylinder while chlorine is admitted to form zinc chloride slag.
* Skims slag after completion of reaction as indicated by color of slag and molten metal.
* Pours metal into molds or dips samples into cold water to prepare them for laboratory analysis.
* May hook pot to crane and signal overhead crane operator to transfer lead from one kettle to another.
* May crystallize zinc in water-cooled vacuum tank to remove zinc from desilverized lead.
* May produce antimony crystals from antimonial lead by mixing prescribed reagents with molten metal in kettle, by skimming dross, and by cooling bath to specified temperature.
* May be known according to specific duty performed as Desilverizer.
Industry:Professional careers
A professional who tends mill that mixes flue dust with water to settle it for shipment. Respnsibilities include:
* Opens bin outlet allowing dust to fall into mixing mill.
* Dislodges banked dust in bin by hammering sides.
* Starts mill and opens valve of water spray.
* Opens door of mill allowing moistened dust to fall onto conveyor belt leading to railroad car.
* May distribute mixture evenly in car, using shovel.
Industry:Professional careers
A professional who tends rod mills that grind ore, clinkers, and rock into fine particles. Respnsibilities include:
* Starts mill and feed conveyors.
* Turns valves to feed lime, water, starch, soda ash, and other materials into mill to make slurry.
* Pushes button to start screw conveyor that separates coarse particles from slurry and returns them to mill for regrinding.
* Obtains sample of ore or slurry in bucket for laboratory analysis.
* Weighs sample on balance scales to determine density of slurry.
* Turns valves to feed water into mill to obtain specified density of slurry.
* Replaces worn rods in mill, using electric hoist.
* May record operating time of rod mills and levels of materials in storage bins.
Industry:Professional careers
A professional who tends rod mills that grind ore, clinkers, and rock into fine particles. Respnsibilities include:
* Starts mill and feed conveyors.
* Turns valves to feed lime, water, starch, soda ash, and other materials into mill to make slurry.
* Pushes button to start screw conveyor that separates coarse particles from slurry and returns them to mill for regrinding.
* Obtains sample of ore or slurry in bucket for laboratory analysis.
* Weighs sample on balance scales to determine density of slurry.
* Turns valves to feed water into mill to obtain specified density of slurry.
* Replaces worn rods in mill, using electric hoist.
* May record operating time of rod mills and levels of materials in storage bins.
Industry:Professional careers
A professional who seals opening around carbon anode, where it protrudes through cover of magnesium refining cell, to prevent leakage of chlorine gas and to secure anode in position.
* Applies mixture of asbestos fiber or pulp and water or oil, using trowel.
Industry:Professional careers
A professional who rakes or scrapes flue dust from converter flues or hoppers into larry cars or screw conveyors for shipment to furnaces.
* Breaks up packed dust with bar or pole, and hammers sides of hopper with mallet or bar to dislodge contents.
* May drive larry car to furnace, and dump load into furnace.
* May scrape dust into collecting hoppers.
* May measure depth of dust in flue, using sounding chain.
Industry:Professional careers
A professional who rakes or scrapes flue dust from converter flues or hoppers into larry cars or screw conveyors for shipment to furnaces.
* Breaks up packed dust with bar or pole, and hammers sides of hopper with mallet or bar to dislodge contents.
* May drive larry car to furnace, and dump load into furnace.
* May scrape dust into collecting hoppers.
* May measure depth of dust in flue, using sounding chain.
Industry:Professional careers
A professional who mixes flux for graphite tubes and replaces tubes and chemical supply tanks on aluminum remelt furnaces. Respnsibilities include:
* Mixes silicon aluminum paint solution (flux) and dips ends of new graphite tubes into solution to coat them.
* Transports tubes and tanks of chlorine and nitrogen to furnaces, using handtruck.
* Turns valves to shut off flow of chlorine and removes tubes from furnace, using handtools.
* Discards broken tubes and installs new ones.
* Cleans usable tubes, using wire brush, and installs them to specified depth.
* Installs replacement tanks of chlorine and nitrogen on furnace, using handtools, and adjusts valves until tank pressure and flowmeters reach specifications.
* Records amounts of chemicals and tubes used for each furnace.
* Tours furnace area to verify readings of pressure and flowmeter gauges and makes required adjustments.
Industry:Professional careers
