Lesson 1/Learning Event 1
Learning Event 1
DESCRIBE ROCK CRUSHING REQUIREMENTS AND EQUIPMENT SELECTION
Your selection of equipment for a rock processing facility is accomplished after a thorough study and evaluation
of five factors. These five factors are:
mission to be accomplished,
equipment available,
raw material to be crushed;
the amount and type of processing required, and
a chart depicting the anticipated flow of materials through the facility.
These factors make up the rock crushing requirement for your operation.
MISSION
The mission of your unit will indicate the size and amount of rock product desired and the time given to
accomplish this task. The size product desired may be given as a maximum top size or as a graded size product:
Maximum Top Size (Example): 7,000 tons of 3-inch minus material.
Graded Size Produce (Example): 7,000 tons of aggregate to meet the following specifications:
Size
Percent Passing
1-inch
100 percent
3/4-inch
90-100 percent
1/2-inch
20-55 percent
3/8-inch
0-15 percent
#4
0-5 percent
The mission will also indicate if washing is required or if sand should be reclaimed from the fines generated
through the crushing action.
EQUIPMENT AVAILABLE
You should make an assessment of the equipment available for your facility. This should include the unit's TOE
equipment as well as equipment from supporting organizations. This assessment should also include the
availability and skills of the personnel to operate the equipment.
RAW MATERIAL
The type and size of the raw material to be crushed will determine the type of crusher that you will need to
process the rock. If the raw material is quarry
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