Material Handling/Conveying
6/8/2009

In the pit-and-quarry industry, not all material is of the same consistency and value. The equipment needed to move it efficiently and profitably varies, and savvy producers study their operation and buy equipment suited to the task at hand.
An operator would not, for example, use a pneumatic cement-conveying system to move a pile of heavy rock. Nor would he move powder over a conveyor system exposed to high winds and weather extremes. In short, different materials require different transportation practices. This is easily noted when comparing the angles of repose and surcharge of various products.
Wet sand, for example, is sluggish compared to dry. If aerated, cement flows freely but compacts after the air is removed. Marble chunks are free-flowing, as is crushed traprock, but broken sandstone and bentonite are sluggish. In any case, the flowability of any material may change depending on factors such as the weather, temperature and storage conditions.
The best advice is to rely on the opinions of qualified manufacturers or consultants when deciding to buy a new system or add to an existing one to make it more versatile and efficient. Virtually all manufacturers employ in-house specialists who answer questions about system design and operation. It also is a good idea to take topography into account. The higher a system is off the ground, the harder it is to maintain. Cost savings is always a goal. A well-engineered material-handling system may help producers spare the expense of additional payroll, heavy equipment and haul vehicles.
Tag:Material Handling/Conveying
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