- Industry: Government; Labor
- Number of terms: 77176
- Number of blossaries: 0
- Company Profile:
A professional who tends equipment to prepare basic chemical solutions used in production of synthetic rubber. Respnsibilities include:
* Opens valves and starts pumps to admit chlorobutadiene into weigh tank.
* Adds specified ingredients into tank, according to formula.
* Starts agitator in tank to mix contents.
* Turns valve to control flow of steam into tank jacket to maintain specified temperature of solution.
* Mixes persulfate and water in tank according to formula.
* Pumps prepared solution to processing areas.
* Records data, such as materials prepared and chemicals used.
* Pumps brine or nitrogen through chlorobutadiene stored in tanks to prevent spontaneous polymerization.
* Disassembles and cleans scrubbers, using handtools and steam hose.
Industry:Professional careers
A professional who tends machine that compresses loose salt into blocks for use as cattle feed supplement. Respnsibilities include:
* Opens gate to transfer premixed salt from bin to measuring hopper.
* Starts press that automatically admits measured amount of salt into compression chamber, compresses salt into blocks, and ejects blocks onto chute.
* Lifts blocks from chute and stacks them on pallet.
* Cleans machine.
* May fortify salt by adding and mixing specified amounts of potassium iodide or other fortifiers to salt before it is compressed into blocks.
Industry:Professional careers
A professional who tends crystallizer to process chemical solution into crystalline form. Respnsibilities include:
* Pumps specified amounts of materials and solvent or dumps drums of solutions into crystallizer.
* Starts agitator and pumps coolants into coils of crystallizer.
* Reads thermometer, observes product, and turns coolant valve to regulate temperature and control rate of crystallization according to specifications.
* May heat ingredients in crystallizer to prevent premature crystallization.
* May start centrifuge to separate crystallized substances from solvent.
Industry:Professional careers
A professional who tends machines that dry, grind, and screen materials, such as sodium nitrate, apricot pits, sulfur, and clay for use in making dynamite. Respnsibilities include:
* Shovels or dumps materials into drier hopper and adjusts temperature of steam-heated drier to specified reading.
* Starts conveyors and elevators that convey materials through drier and grinder.
* Starts grinder and sifting screens that grind and screen materials and deposit them in bins.
* May drive scoop tractor to fill drier hopper.
* May test moisture content of ingredients, using carbide-filled jar and gauge that registers gas produced.
* May weigh out dried ingredients according to formula, to prepare batches for mixing with nitroglycerin.
* May be designated according to ingredient treated as soda-dry-house operator.
Industry:Professional careers
A professional who tends mill that dries and pulverizes pasty chemical materials. Respnsibilities include:
* Starts mill, turns valves, and observes gauges to regulate temperature and suction as specified.
* Hoists containers of materials to be milled onto loading platform, using chain fall, and dumps specified quantity of materials into mill.
* Regulates flow of hot air through mill, according to size of milled batch, and controls speed of suction pump that removes pulverized product after milling and drying.
Industry:Professional careers
A professional who tends machines that automatically dust uncured sponge rubber sheeting with talc powder to prevent rolled surfaces sticking together or remove excess powder from sheeting. Respnsibilities include:
* Shovels powder into hopper to load machine for dusting.
* Mounts roll of sheeting in cradle and threads end between fleece rollers or brushing unit of machine to dust surface with talc or remove excess talc, and wind sheeting onto empty roll.
* Starts machine, observes feeding of material, and keeps hopper filled with talc, when dusting.
* Blows dust from operating parts of machine, using airhose.
Industry:Professional careers
A professional who tends mixing machine, evaporating pans, grinding mills, and drying oven that process powdered ingredients into granulated effervescent salts for use in drug preparations. Respnsibilities include:
* Dumps prescribed quantity of citric acid crystals into mill and starts machine to grind crystals.
* Starts mixer and adds ground crystals and specified amount of powdered ingredients to blend for designated time.
* Sets thermostat to regulate temperature of steam-jacketed evaporator pans, and dumps mixture into pans to heat for specified period and remove moisture.
* Inserts screen in mill and dumps contents of evaporator pans into machine to granulate to uniform size.
* Scoops granules into trays.
* Places trays in drying oven for predetermined time.
* Dumps or scoops dried granules into hopper or chute for transfer to storage or packaging area.
* May screen granules to remove particles smaller than specified size, using sieve.
Industry:Professional careers
A professional who tends mixing machine, evaporating pans, grinding mills, and drying oven that process powdered ingredients into granulated effervescent salts for use in drug preparations. Respnsibilities include:
* Dumps prescribed quantity of citric acid crystals into mill and starts machine to grind crystals.
* Starts mixer and adds ground crystals and specified amount of powdered ingredients to blend for designated time.
* Sets thermostat to regulate temperature of steam-jacketed evaporator pans, and dumps mixture into pans to heat for specified period and remove moisture.
* Inserts screen in mill and dumps contents of evaporator pans into machine to granulate to uniform size.
* Scoops granules into trays.
* Places trays in drying oven for predetermined time.
* Dumps or scoops dried granules into hopper or chute for transfer to storage or packaging area.
* May screen granules to remove particles smaller than specified size, using sieve.
Industry:Professional careers
A professional who tends electrode cleaning machine that scrapes excess carbon from baked or graphitized electrodes. Respnsibilities include:
* Pushes machine, mounted on rails, to area where electrodes are stacked horizontally on racks and aligns machine with guide bars extending from rack.
* Blocks wheels to prevent machine from rolling during cleaning process.
* Moves levers that lower stop bar on machine and allow electrode to roll from rack onto rollers of machine.
* Starts machine to rotate electrode on rollers and moves lever to lower abrasive belt onto electrode to scrape away excess carbon.
* Stops machine when scraping is complete and moves lever that raises abrasive belt and ejects cleaned electrode onto rack adjacent to machine.
* Inspects cleaned electrode to ensure that excess carbon is removed.
Industry:Professional careers
A professional who tends equipment that shrinks rubberized fabric sheeting or tubing to increase strength of material. Respnsibilities include:
* Positions reel of rubberized stock in letoff rack, by hand or using hoist.
* Adjusts stock guides and tension rollers on machine, using handtools, to accommodate stock.
* Dumps powdered soapstone in hopper of equipment to dust stock.
* Moves controls to regulate temperature of water in dip tank and speed of equipment.
* Threads rubberized fabric stock through machine.
* Starts equipment that moves stock through water bath, drying compartment, under soapstone dispenser, and onto windup reel.
Industry:Professional careers
