- 업종: Government; Labor
- Number of terms: 77176
- Number of blossaries: 0
- Company Profile:
A professional who tends pug mill that mixes preheated magnesia and carbon with hot asphalt to form viscous mixture for use in making pellets. Respnsibilities include:
* Moves lever to open slide gate at outlet of heating chamber to permit heated mixture of magnesia and carbon to flow into pug mill.
* Opens and regulates valves to control flow of hot asphalt into mill.
* Opens valves to feed mixture into hoppers of briquetting machine.
Industry:Professional careers
A professional who tends sintering machine and auxiliary equipment, such as conveyors, pug mill, and suction fan, to produce sinter cake from finely ground iron ore, lead, coke, and flue dust. Respnsibilities include:
* Turns gas valve of sintering machine and ignites burner with torch.
* Moves controls on panelboard to start equipment.
* Signals sinter feeder to feed pug mill conveyor specified amounts of sinter material.
* Feels mixture processed by pug mill to determine moisture content.
* Moves controls to regulate water supply to pug mill to attain specified moisture in mixture.
* Examines sinter cake produced by sintering machine and moves controls of machine to produce cake to specifications.
* Chips sinter material from chutes and spouts of machine, using bar and hammer.
* Records weight and type of materials used.
Industry:Professional careers
A professional who tends agitation tanks that mix copper ore slime and acid solution preparatory to precipitation of copper. Respnsibilities include:
* Turns valves to regulate flow of slime and sulfuric acid from storage tanks into agitation tanks.
* Tests samples of solution for alkalinity or acidity, using filter paper, or by means of titration.
* Combines samples of solution from various stages of process for laboratory analysis.
* May dry, grind, or screen combined sample.
Industry:Professional careers
A professional who supervises and coordinates activities of workers engaged in extracting alumina from bauxite. Respnsibilities include:
* Calculates feed rates of raw materials, using formulas and chemical analysis reports.
* Inspects machines and equipment.
* Performs other duties as described under supervisor master title.
Industry:Professional careers
A professional who supervises and coordinates activities of workers engaged in operating electrostatic dust precipitators to control emission of air pollutants or to salvage usable dust from flue. Respnsibilities include:
* Inspects precipitators in service to determine adjustments required, and out-of-service precipitators for need of maintenance and repair.
* Trains new workers in adjusting operation and rapping, and explains plant layout, working procedures, and safety regulations.
* May notify air and water pollution-control personnel when operating difficulties cause deviations from pollution standards.
* May be designated according to type of precipitation as Stack Supervisor.
* Performs other duties as described under supervisor master title.
Industry:Professional careers
A professional who supervises and coordinates activities of workers engaged in tending machines and equipment, such as screens, settlers, flotation cells, thickeners, or filterers, to process ore concentrate and slurry. Respnsibilities include:
* Inspects machines, equipment, and conveyor systems to detect mechanical defects or malfunctions, and assigns workers to make repairs or adjustments.
* Observes workers to ensure compliance with safety regulations.
* Instructs new employees in machine and equipment operation.
* May be designated according to process supervised as Dewatering-Filtering Supervisor; Flotation Supervisor; Screen Supervisor.
* Performs other duties as described under supervisor master title.
Industry:Professional careers
A professional who controls chemical-processing equipment to recover tungsten oxide from ground concentrated ore. Respnsibilities include:
* Starts conveyor to fill reactor tank with ore.
* Turns valves to pump specified quantity of hydrochloric acid into tank and to admit steam into tank jacket.
* Observes temperature gauge and adjusts valves to maintain acid solution at specified temperature for specified time.
* Fills tank with water to wash slurry, and drains waste-bearing water.
* Turns valve to pour slurry into caustic tank.
* Precipitates impurities, such as chlorides and oxides, by adding ammonia and sulfuric acid to solution.
* Filters solution into holding tank to remove precipitate.
* Adds specified amount of hydrochloric acid to tank to crystallize solution.
* Dries tungsten oxide crystals by pumping them through filter or centrifuge.
Industry:Professional careers
A professional who controls chemical-processing equipment to recover tungsten oxide from ground concentrated ore. Respnsibilities include:
* Starts conveyor to fill reactor tank with ore.
* Turns valves to pump specified quantity of hydrochloric acid into tank and to admit steam into tank jacket.
* Observes temperature gauge and adjusts valves to maintain acid solution at specified temperature for specified time.
* Fills tank with water to wash slurry, and drains waste-bearing water.
* Turns valve to pour slurry into caustic tank.
* Precipitates impurities, such as chlorides and oxides, by adding ammonia and sulfuric acid to solution.
* Filters solution into holding tank to remove precipitate.
* Adds specified amount of hydrochloric acid to tank to crystallize solution.
* Dries tungsten oxide crystals by pumping them through filter or centrifuge.
Industry:Professional careers
A professional who tends equipment that separates zinc chloride from slag. Respnsibilities include:
* Breaks up slag, using sledgehammer.
* Loads slag into water-filled tank, using hoist.
* Agitates solution to dissolve zinc chloride from slag, using airhose.
* Determines specific gravity and acidity of solution, using hydrometer and chemical reagents.
* Pumps impurities from solution through filters.
* Samples solution and observes its color to determine need for additional reagents and agitation.
* Pumps treated solution to tank cars or drums.
* Cleans sediment from equipment, using shovel and water hose, and replaces filter cloths.
Industry:Professional careers
A professional who controls machines and equipment from instrumented control board to scrub, condition, float, classify, and convey phosphate rock for use in fertilizer and phosphoric acid. Respnsibilities include:
* Monitors recording instruments, gauges, panel lights, and other indicators, and listens for warning signal to verify conformance to plant standards.
* Turns screws and knobs on control board to adjust flow of reagents, airflow, phosphate-rock feed rate, and conveyor belts.
* Observes flotation tanks to determine amount of sand clinging to rock, cyclones to detect presence of solids, and classifiers to detect wobble in or uneven feed rate of screw.
* Reports belt weight, amount and evenness of feed rate, waterflow amount, and specific density of slurry to mine, using telephone.
* Weighs samples from scrubber and conditioner to determine that amount of reagents in tank meets specifications.
* Reviews laboratory test results and makes adjustments required on control board.
* Inspects machines and equipment for potential and actual hazards, wear, leaks, and mechanical malfunctions requiring maintenance.
* Collects samples at various stage of operation for laboratory analysis.
* Records instrument readings, process conditions, and other operating data in shift log.
* Manually regulates or shuts down equipment as directed by supervisor.
* May tag samples collected for laboratory analysis.
* May assist in making mechanical repairs to machines and equipment during shutdown.
Industry:Professional careers
