Sturtevant Whirlwind Centrifugal Air Classifier
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Sturtevant Mill Company of Europe (SMCE) whirlwind centrifugal air classifiers are machines for separating fine material from coarse material with a usual fin-product range of from 40 to 400 mesh. Their accuracy in selecting the desired fine product is amazing.
As they are built in many sizes from 20” to 24’ in diameter with capacities from a few hundred pounds to over a hundred tons per hour, a size may be selected to give practically any desired tonnage.
As they are built in many sizes from 20” to 24’ in diameter with capacities from a few hundred pounds to over a hundred tons per hour, a size may be selected to give practically any desired tonnage.
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The Sturtevant Mill Company of Europe (SMCE) whirlwind centrifugal air classifier is essentially a sizing machine, a classifier or a selector. It does not crush nor reduce material, but is a carefully designed apparatus for sizing, by separating the fine material from the coarse.
It is efficient when operated alone or in a closed circuit with most types of grinding machines. Ground materials from the Mills are conveyed to the Air Classifier for particle size selection. The finer particles (fines) are selected for use or storage and the coarser particles rejected and may be returned to the Mill for further grinding.
They may be used for the removal of fine particles (dust) from materials already milled or in a natural fine state, but their most important function is to operate in closed-circuit with a pulverizer.
In “Closed-Circuit” grinding the air classifier becomes an important and integral part of the pulverizing system and the governing factor of the finished product.
“Closed-Circuit” allows both Mill and air classifier to function as each was designed to function; the one to grind, and grind only, without handicap or hindrance, and the other to select and remove the finished product from the pulverizer, easily, freely and as soon as made. This has been a real accomplishment of modern science availed of by many who have understood and appreciated its possibilities.
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The modern slow-speed durable Sturtevant Mill Company of Europe (SMCE) whirlwind centrifugal air classifier has truly revolutionized the pulverizing technique. It has not only been the means of materially reducing grinding costs by increasing mill capacities from 25 to 300 %, lowering power consumption from 10 to 50%, and decreasing upkeep, but has greatly improved efficiencies and made possible finer, and still finer products to meet ever more exacting trade requirements.
Its capacity is almost unlimited, and its ability to handle enormous circulating loads is unequaled. A 16’ Separator, for example, is taking a feed of 800 tons per hour containing an only small percentage of the desired product and is delivering 30 tons per hour of material 90% 200 mesh. Only a few years ago such a circulating load was unheard of, such a capacity unbelievable, such an efficiency unknown, yet today it is thoroughly practical, many times desirable and economical.
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The principle of Sturtevant Mill Company of Europe (SMCE) whirlwind centrifugal Air Classification is simple. It consists of the exact regulation and control of the centrifugal force and air currents, one counteracting and overbalancing the other to such a nicety that by simple adjustments a product of almost any desired fineness is selected and collected, while the coarser sizes are rejected. The efficiency of operation depends upon the reliable accuracy of these adjustments. And although the principle is simple it has been a most difficult matter to work out practically.
We are always at your disposal to provide you with all the original spare parts for your Air Classifiers provided by us and according to the original plans that we have.