HYDRAULIC HOISTING OF COAL AND ORES

Although it has often proved profitable for horizontal or gently sloping installations, the principle of hydraulic transportation has rarely been applied to the hoisting of materials to any significant height. Investigations, and the design of several projects, including the Saint Etienne installation in France, have shown that the hydraulic hoisting of solids is not only feasible but, owing in part at least to the fact that it is a continuous process, it can offer a number of attractive features such as: 1. Small shaft space requirements. Example: 9000 tons of coal can be hoisted daily through a 16-in. pipe. 2. Low investment costs. Example: $1 per ton-hour-foot for a typical installation for coal and less for denser materials. 3. Low operating costs resulting from a good power efficiency. Example: 15 cents per ton-mile of hoisting. 4. Ease in combining hoisting with horizontal transport. The materials take an even distribution within the cross-sectional area of the pipe and the velocity distribution appears to be about the same as for clear water. The apparent absence of friction between the particles and the pipe wall was confirmed by velocity and concentration curves obtained during systematic tests. The amount of energy dissipation associated with the transportation of materials in a vertical pipe can therefore be anticipated to be small. The process appears to be inherently economical and is explained in greater detail in the article.

  • Corporate Authors:

    American Mining Congress

    Ring Building, 1200 18th Street, NW
    Washington, DC  USA  20036
  • Authors:
    • Chapus, E E
    • Condolios, E
    • Couratin, P
  • Publication Date: 1972-9

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Filing Info

  • Accession Number: 00056444
  • Record Type: Publication
  • Source Agency: American Mining Congress
  • Files: TRIS
  • Created Date: Jul 15 1974 12:00AM