MATERIALS HANDLING Choosing Conveyors and Elevators for Specific Materials Transported Determining Equipment Design Parameters for Overhead Conveyors Screw Conveyor Power Input and Capacity Design and Layout of Pneumatic Conveying Systems | Source HANDBOOK OF MECHANICAL ENGINEERING CALCULATIONS SECTION 10 MATERIALS HANDLING Choosing Conveyors and Elevators for Specific Materials Transported Determining Equipment Design Parameters for Overhead Conveyors Bulk Material Elevator and Conveyor Selection Screw Conveyor Power Input and Capacity Design and Layout of Pneumatic Conveying Systems CHOOSING CONVEYORS AND ELEVATORS FOR SPECIFIC MATERIALS TRANSPORTED Determine the maximum allowable product weight between supports that can be handled by a belt conveyor at any one time when it conveys 100 000 lb h 4540 kg h of pulverized aluminum oxide in an abrasive state at a belt speed of 50 ft min m min with a center-to-center distance of 32 ft m between belt supports. Compare this capacity with that at belt speeds of 150 250 and 350 fpm and m min . Choose the type of conveyor and elevator to handle this material under the conditions given. Calculation Procedure 1. Find the maximum allowable product weight at the given belt speed Use the relation P KC 60 S where P maximum product weight on the belt at any one time lb kg between belt supports K load lb h kg h C center-to-center distance between belt supports ft m S belt speed ft min m min . Substituting we have P 100 000 32 50 60 lb kg . 2. Determine the maximum allowable product weight at other belt speeds Typical conveyor belt speeds vary from a low of 150 ft min m min to a high 800 ft min m min depending on belt width type of material conveyed belt construction etc. For this belt using the data given earlier P 100 000 32 150 60 lb kg when the speed is 150 ft min m min . Likewise for the two higher speeds respectively P 100 000 32 250 60 lb kg P 100 000 32 350 60 lb kg . 3. Verify the type of conveyor and elevator to use With such a wide variety of conveyors and elevators to choose from it is wise to verify the choice before a final decision is made.
