Modern Quarrying Q1 2023
Figure 1: CEMA standard belt edge distance recommendations. © 2023 Martin Engineering
Figure 2: Comparison of capacity increase by changing idler trough angle. ©2023 Martin Engineering.
Changing from a 35 to 45-degree trough angle and the wider belt and idlers would result in a 90% increase in cross-sectional area. This method is not often used, because there is resistance to increasing capital cost for a wider and higher load-bearing structure, higher material mass and larger drive. However, it is an excellent approach if there is an expecta tion of increasing capacity in the future. l
Martin Engineering has been a global innovator in the bulk material handling industry for more than 75 years, developing new solu tions to common problems and participating in industry organi sations to improve safety and productivity. The company’s series of Foundations books is an internationally-recognised resource for safety, maintenance and operations training. Martin Engineering prod ucts, sales, service and training are available from 16 factory-owned facilities worldwide, with wholly-owned business units in Australia, Brazil, China, Colombia, France, Germany, India, Indonesia, Italy, Mexico, Peru, Spain, South Africa, Turkey, the USA and UK.
MODERN QUARRYING QUARTER 1 | 2023 10
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