PART B: MECHANICAL PROCESSING INDUSTRIES
1. Mechanical processing industries primarily are those engaged in the sizing,
sorting, separating or otherwise changing the physical form or appearance of raw
materials. Like other processing industries, mechanical processing industries have
facilities for handling and storage of large quantities of bulk materials and
waste, large quantities of power, and large complex buildings.
Specific
identification features include:
Few pipelines or closed tanks
Small quantities of fuel
Few chimneys or stacks
Dams (hydroelectric power only).
2. The image components for a mechanical processing industry are divided into four
major categories:
Equipment
Buildings
Dams
Open storage and waste.
a. Equipment is presented under the following headings: chimneys, stacks, and
vents; silos, tanks, hoppers, and bunkers; pipelines, conveyors, cranes, and mobile
equipment; and complex equipment.
(1)
Chimneys, stacks, and vents all serve similar purposes--to dispose of
heat, waste gases, and fine dust. Stacks are built of masonry or sheet metal and
vary in diameter and height.
There are two types of vents--short, round vents,
usually covered, and monitor-like vents (Appendix A, page 101, Figures A-1 thru A-
10).
NOTE: The few stacks and vents associated with mechanical processing industries
rarely aid in analyzing and industry.
(2) Silos, tanks, hoppers, bins, and bunkers are all used for storage.
However, some of the low, open tanks have special processing functions.
Silos,
tall covered cylindrical containers usually found in groups, hold dry bulk
materials. Covered round tanks, for storage of water and fuel oil, are relatively
few in mechanical processing industries.
Low, open round tanks such as Dorr
thickeners and mixers are typical of ore concentration and water purification.
Tanks also may be square or rectangular, open or closed, buried or above ground.
Hoppers, bins, and bunkers hold bulk goods temporarily and help indicate the flow
of materials (Figures A-17 thru A-37).
(3) Pipelines, conveyors, cranes, and mobile equipment are used to handle or
transport materials.
Pipelines appear as slender connecting lines between
buildings and equipment. Conveyors, either inclined or horizontal, housed or open,
handle bulk materials between storage areas
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IT 0673
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