- 업종: Government; Labor
- Number of terms: 77176
- Number of blossaries: 0
- Company Profile:
A professional who tends series of vibrating screens that separate crushed ore or stone according to size. Respnsibilities include:
* Pushes controls to start screens vibrating and move ore on conveyors or belts.
* Pulls levers to discharge crushed ore from conveyor or chute onto vibrating screens.
* Clears screen holes clogged with oversize ore, using bar.
* Removes clogged screens, using wrenches, and cleans them with compressed air.
* May tend conveyor belts and process ore through crushers.
* May obtain ore samples, using mechanical sampler, hand sieve, or splitter.
* May tend screens that separate phosphate rock from matrix and be designated Feed-Preparation Operator.
Industry:Professional careers
A professional who tends equipment, such as grinders, leachers, filters, pressers, and evaporators that recover gold, silver, selenium, and other minerals from impurities. Respnsibilities include:
* Grinds impure slag or ore in ball mill, and mixes slag with water to form slurry.
* Turns valves and starts pumps to force mixture into leaching tanks.
* Starts agitators and adds chemicals to leach combined solutions.
* Starts pumps to force leached solution into settling tanks, and installs orifices to control rate of flow of sediment and liquids to and from settling tanks to remove liquid.
* Feeds settled solution through rotary-drum filters, and presses filtered slime in press.
* Boils selenium residue to remove moisture for barreling.
* Obtains and weighs samples of slimes during process, using container and platform scales, and delivers samples to laboratory for analysis.
* Drains and cleans tanks, wire screens, inflow pipes, and equipment with water hose.
* May be designated according to mineral recovered as Selenium-Plant Operator.
Industry:Professional careers
A professional who assists slime-plant operator ii in separating ore concentrate from slurry. Respnsibilities include:
* Turns valves to regulate flow of liquids into tank.
* Observes operation of filters and notifies slime-plant operator ii of malfunctions.
* Replaces worn filters, using handtools.
* Lubricates valves and adjusts packing glands.
* May record operating data in log.
* May tend overhead bridge crane to transport filters and equipment.
* Performs other duties as described under helper master title.
Industry:Professional careers
A professional who tends concentrating tables that separate valuable metals from gangue of ore and scrap. Respnsibilities include:
* Turns valves to regulate flow of pulp onto tables.
* Regulates speed of reciprocating tables to effect maximum separation and recovery of metals.
* Adjusts slope of tables to establish line of separation between ore and gangue and between valuable metal and scrap.
* Repairs tables, and adjusts and lubricates driving mechanism.
* May be designated according to materials processed as Table Tender, Sludge.
Industry:Professional careers
A professional who tends trommel (revolving drumlike sieve) that washes copper precipitate from scrap iron. Respnsibilities include:
* Starts previously loaded trommel and turns on water sprays.
* Pumps precipitated copper and water mixture into settling tank.
* Shovels spilled scrap iron back into tank.
* Lubricates trommel bearings, and washes copper from equipment with water hose.
* May line bottom of railroad car with precut wooden boards preparatory to loading car with copper.
Industry:Professional careers
A professional who assists reagent tender in separating metallic particles from gangue of ore. Respnsibilities include:
* Connects air line and line from storage tank to tank car, using handtools.
* Turns valves to release air pressure into lines, and observes connections for leaks.
* Turns valves to pump chemical solutions, such as chlorine, caustic soda, and fuel oils, from tank cars into storage tanks.
* May weigh steel rods and balls and transport them to mills, using air-powered dinkey engine.
* Performs other duties as described under helper master title.
Industry:Professional careers
A professional who cleans flannel blankets over which mixture of finely ground gold ore and cyanide solution from grinding mills is passed to collect free particles of gold not dissolved by cyanide. Respnsibilities include:
* Collects blankets from frames at outflow point of mills.
* Washes blankets in pans of weak cyanide solution to dislodge gold particles so they may be collected in amalgamation process.
* Replaces blankets on frames after washing.
Industry:Professional careers
A professional who assists dust-collector operator in collecting metallic dust particles from fumes of smelting copper ore. Respnsibilities include:
* Pushes switches to shut off electric current to precipitators, and observes amount of dust accumulated on electrode pipes and plates.
* Pulls levers to start hammers that knock dust from electrodes into collecting chambers.
* Opens chamber doors and blows down dust remaining in chamber, using airhose.
* Replaces broken wires in precipitators, using pliers.
* Turns valves to add acid solution and water to chambers to cool and treat fumes.
* Performs other duties as described under helper master title.
* May be designated Acid Conditioner; Cottrell Blower.
Industry:Professional careers
A professional who assists dust-collector operator in collecting metallic dust particles from fumes of smelting copper ore. Respnsibilities include:
* Pushes switches to shut off electric current to precipitators, and observes amount of dust accumulated on electrode pipes and plates.
* Pulls levers to start hammers that knock dust from electrodes into collecting chambers.
* Opens chamber doors and blows down dust remaining in chamber, using airhose.
* Replaces broken wires in precipitators, using pliers.
* Turns valves to add acid solution and water to chambers to cool and treat fumes.
* Performs other duties as described under helper master title.
* May be designated Acid Conditioner; Cottrell Blower.
Industry:Professional careers
A professional who scrapes caked waste material from sides of flotation cells, and washes cells with water.
* May ream out air passages of agitators, using steel rod.
* May collect samples of pulp and concentrate at prescribed intervals for analysis.
* May assist in dismantling and repair of equipment.
* May record details of operating conditions in log.
Industry:Professional careers
