Powdered abrasive material has been used in ship sandblasting for quite some time, but now some shipyards have begun to study alternatives to sandblasting. For example, the steel shot peening technology is used to remove the oxide scale and rust on the surface of the steel plate, and then the primer is sprayed in the spraying workshop, which can protect the steel plate from rusting during the shipbuilding process. The increase in shipbuilding has also increased the number and size of segments. At present, the sectional brick spraying rooms of various factories can no longer meet the requirements of secondary rust removal. Therefore, more and more manufacturers have begun to adopt the outdoor copper slag spraying process.