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Materials obtained from a natural ore through a process of purification by physical or chemically removing all or part of any undesired materials in the ore.



Related Terms

FROTH FLOTATION

A process for recovery of particles of ore or other material, in which the particles adhere to bubbles and can be removed as part of the froth.

FLANGING

A forming process in which the edge of a metal part is bent over to make a flange at a sharp angle to the body of the part.

FINEBLANKING

A manufacturing process in which a part is fabricated to a shape very close to its final dimensions by use of high-precision tools that yield a final workpiece with smoothly sheared edges.

OBSERVATION SPILLOVER

The part of the sensor output of an active control system caused by modes that have been omited from the control algorithm in the process of model reduction.

FORMING

  1. Application of voltage to an electrolytic capacitor, electrolytic rectifier, or semiconductor device to produce a desired permanent change in electrical characteristics as a part of the manufacturing process. 2. A process for shaping or molding sheets, rods, or other pieces of hot glass, ceramic ware, plastic, or metal by the application of pressure.

PARCEL

1) Part of the process of protecting a wire or rope by worm, parcelling and serving. 2) Small tarred stuff is wound into the grooves of the lay to give the rope a smooth surface (worming). 3) Tarred canvas is then wound around the smooth surface (parcelling) 4) Finally a tarred seizing of thin wire or twine is tightly wound around all using a serving mallet to apply tension (serving).

GAY-LUSSAC TOWER

A component part in the chamber process for sulfuric acid production that absorbs nitrogen oxides to form nitrous vitriol.

CONDITION BASED MAINTENANCE

(CBM) a maintenance plan, conducted on a frequent or real-time basis, which is based on the use of Condition Monitoring to determine when part replacement or other corrective action is required. This process involves establishing a baseline and operating parameters, then frequently monitoring the machine and comparing any changes in operating conditions to the baseline. Repairs or replacement of parts are carried out before the machinery fails based upon the use of the tools prescribed for CM.

BACK-RUN PROCESS

A process for manufacturing water gas in which part of the run is made down, by passing steam through the superheater, thence up through the carburetor, down through the generator, and direct to the scrubbers.

SERVE

1) Part of the process of protecting a wire or rope by worm, parcelling and serving. 2) Small tarred stuff is wound into the grooves of the lay to give the rope a smooth surface (worming). 3) Tarred canvas is then wound around the smooth surface (parcelling). 4) Finally a tarred seizing of thin wire or twine is tightly wound around all using a serving mallet to apply tension (serving).

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