Cement Carriers

Fig. 34 Self-Unloading Vessel Cementkarrier Built in 1930

There is a considerable movement of bulk cement along the canals and in the lakes, two specially designed vessels being used for the trade. These vessels, the Cementkarrier and the Bulkarrier are generally similar in arrangements and are owned by the Canada Cement Company Limited. The Cementkarrier (Fig. 34) is a Diesel-electric vessel with electric auxiliary machinery. The cargo space is divided into 6 hopper-type holds by 4 transverse and one centerline bulkhead and to protect the cargo a double shell is fitted in way of the holds. The holds are filled by a shore pipe system led into small watertight hatches and discharge into two scraper tunnels running fore and aft.

The discharge gear consists of a Sauerman scraper, supported on an overhead trackway, situated in each tunnel and hauled along the scraper tunnels by steel wires led to two electric haulages. These drag the scrapers up an inclined path and discharge the cement into a hopper bunker which, in turn, feeds it through a sliding gate into the archimedean screw of an electrically driven highspeed Fuller Kenyon cement pump. The cement is then blown overboard through an 8-in-diameter compressed-air discharge line (11).

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This paper was presented at a meeting of the Society of Naval Architects and Marine Engineers and is reproduced with permission.