A method and apparatus for blasting a substantially vertical outer surface of a ship's hull

摘要

The method comprises the steps of supplying dry abrasive grit from at least one supply hopper disposed at least one elevated location through a respective hose to a respective work head controlled by a respective operator on a respective tower-supported elevatable work platform. Each operator directs the respective work head towards the external surface of the ship hull as abrasive grit is propelled from it, thereby impacting and rebounding from the external surface together with removed debris and falling as spent abrasive mixed material. The next step is collecting the spent abrasive mixed material and subjecting the collected spent abrasive mixed material to classification into undersize dust, oversize trash and reusable dry abrasive grit. The final step is refilling each supply hopper with the reusable dry abrasive grit.