Characteristics of Bulk Materials

The information contained within this section has been accumulated over a period of several years from various sources that we have deemed reliable. Some entries are for materials that we have either stored or conveyed and for which, the information shown was obtained directly from the producer or user.

We believe that in most cases, you may use this data base for the purpose of preliminary sizing and early stage system design. However, Cambelt International makes no guarantee of accuracy or completeness. You must always verify the actual material characteristics with a knowledgeable source prior to making your conclusions firm and/or setting into place your final design parameters.

To search for the characteristics of a specific material, you can do so alphabetically or by keyword search in the fields below:

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Please reference the materials in the data base to the table below:

Flow Very free Free flowing Average Average Sluggish
Angle of Surcharge 510202530
Angle of Repose 0-1920-2930-3435-3940 up
Characteristics Uniform size, very small rounded particles, either very wet or very dry, such as dry silica sand, cement, wet concrete, etc. Rounded, dry polished particles, of medium weight, such as whole grain and beans. Irregular, granular or lumpy materials of medium weight, such as anthracite coal, cottonseed, meal, clay, etc. Typical common materials such as bituminous coal, stone, most ores, etc. Irregular, stringy, fibrous, interlocking material, such as wood chips, bagasse, tempered foundry sand, etc.

The angle of repose of a material is the angle which the surface of a normal, freely formed pile makes to the horizontal.

The angle of surcharge of a material is the angle to the horizontal which the surface of the material assumes while the material is at rest on a moving conveyor belt. This angle usually is 5 to 15 less than the angle of repose, though in some materials it may be as much as 20 less.

Please consider the data base to be a "live" document as we regularly change and update the information when new materials and better information become available.

If you wish to contribute corrections, update or additions to the list, please feel free to contact us via email.

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