TWO-FLUID JET APPARATUS AND APPARATUS FOR PRODUCING HOT-DIPPED STEEL SHEET WITH MINIMUM SPANGLE USING SAID JET APPARATUS

摘要

PCT No. PCT/JP88/01009 Sec. 371 Date May 29, 1990 Sec. 102(e) Date May 29, 1990 PCT Filed Sep. 30, 1988 PCT Pub. No. WO90/03451 PCT Pub. Date Apr. 5, 1990.An apparatus for injecting two fluids is provided with a first elongated header which extends in a straight line and is supplied with a first fluid, a second elongated header which extends along the first header and is fixed to the backside of the first header, a nozzle lead-in member for leading the first fluid from the first header and the second fluid from the second header, and a nozzle for mixing and injecting the fluids from the nozzle lead-in member. Such apparatus for injecting two fluids has a simple construction and can be produced efficiently. In using this apparatus for injecting two fluids in manufacturing minimized spangle molten plated steel plate, for which water atomized by compressed air is injected toward a surface of the steel plate strip running from bottom to top while passing through a plating bath, a main spangle removing mechanism and a spare spangle removing mechanism are provided and operated selectively and alternately, so that operation can be continued even when either of the mechanisms breaks down.