Conveyor Slopes

Maximum conveyor slopes for various materials

conveyor slopes

Maximum conveyor slopes for various materials are indicated below:

Material Maximum Slope
(degrees)
Anthracite coal 16
Cement - loose 22
Coke - screened 18
Coke - breeze 20
Concrete - 6 inch slump (how wet the concrete is - based on the "slump test") 12
Concrete - 4 inch slump 20
Concrete - 2 inch slope 24 - 26
Coal - soft lumps > 4 inches 15
Coal - soft lumps < 4 inches 16
Coal - unsized 18
Coal - soft fine 20 - 22
Earth - loose 20
Earth - sluggish 22
Gravel - sized and washed 12
Gravel - unsized 18 - 20
Gypsum powder 23
Logs - no bark 10
Ore - larger than 4 inches 18
Ore - less than 4 inches 20
Packages - wrapped in paper on smooth belts 16
Packages - wrapped in paper on ribflex belts or similar 25 - 45
Salt 20
Sand - dry 16
Sand - moist 20
Sand - uniformly sized foundry high-quality silica sand or lake 24
Sulphur - powder 21
Stones - larger than 4 inches 15
Stones - less than 4 inches 16
Whole grain 15
Wood chips 25

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