Evolution of sandwich belt high-angle conveyors

Abstract Conventional belt conveyors offer an economical method for transporting materials at inclines approaching 18 degrees. Sandwich belt conveyors may be used to transport materials at high angles, to 90 degrees, while maintaining the most positive features of conventional conveyors, that is, (1) proven conventional conveyor components, (2) high-speed operation, (3) high-single lifts, (4) continuous cleaning of the smooth surfaced belts, and (5) easy, quick repair by hot or cold vulcanizing. The present discussion deals with the evolution and development of sandwich belt conveyors to satisfy the operational requirements of the open-pit mining and materials-handling industries.
A look at the limitations of conventional shallow angle conveyors reveals the conveying angle at which a cover belt is needed. The relationship between conveying angle and hugging pressure by the cover belt is developed mathematically. A study of past and current developments reveals that the Loop Belt and Beltavator are significant advances in the state-of-the-art. The vertical radius of curvature constraints are discussed in detail and the constraint equations are developed. Criteria for future development is established as a basis for evolutionary developments in sandwich belt high-angle conveyors. The use of intermediate drives in sandwich belt high-angle conveyors is investigated.
Keywords: Open-pit mining, Belt conveyors, Materials handling, Sandwich belt high-angle conveyors, Mechanically-pressed sandwich conveyor, Pneumatically-pressed sandwich conveyor, Air-slide sandwich conveyor, S-shape sandwich conveyor, Snake sandwich conveyor.
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Publication: CIM Bulletin
Author(s): DAVID J. McDOUGALL
Issue: 855
Volume: 76
Year: 1983
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Publication: CIM Bulletin
Author(s): KRIS INWOOD
Issue: 855
Volume: 76
Year: 1983
Text
Publication: CIM Bulletin
Author(s): BERT S. HALL
Issue: 855
Volume: 76
Year: 1983
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Summary: Although the April 19, 1983 federal budget appears to put greater emphasis on new or expanded government spending programs in an effort to get Canadians working again, the budget proposals contain a light sprinkling of tax changes which could be of some direct benefit to the mining industry. This month, Tax Notes examines some of the more important of these changes.
Publication: CIM Bulletin
Author(s): ROBERT B. PARSONS
Issue: 855
Volume: 76
Year: 1983
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Summary: With the advent in Canada of large open-pit equipment, the associated wire rope required must keep pace, especially in design and construction, along with the field that leads to increased rope life.
This paper will first describe the various types of shovels and draglines in use today and also the unique characteristics of the wire rope required to efficiently service this equipment.
Emphasis will be placed on the special equipment and techniques required in the wire rope manufacturing,...
Publication: CIM Bulletin
Author(s): RONALD G. HAMM
Keywords: Open-Pit mining, Shovels, Draglines, Hoist ropes, Drag ropes, Installation, Maintenance, Inspection, Excavators.
Issue: 855
Volume: 76
Year: 1983
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