| 摘要 |
<p>A jet apparatus for jetting two kinds of fluids includes a first header which extends in a linear direction and to which a first fluid is supplied, a second header which extends along the first header at its back and is fixed thereto, a nozzle introduction member which guides the first fluid in the first header and the second fluid in the second header in the direction opposite to the second header relative to the first header and a nozzle which mixes the two fluids from the nozzle introduction member and injects the mixed fluid. Such a two-fluid jet apparatus is simple in structure and has high productivity. When a hot-dipped steel sheet with minimum spangle is produced by jetting water which is atomized by compressed air to the surface of a steel sheet strip passing through a plating tank and travelling from below to above by use of such a two-fluid jet apparatus, a main spangle removing means and an auxiliary spangle removing means are prepared at upper and lower portions and these two spangle removing means are operated alternately and selectively so that the operation can be continued even when one of them is out of order.</p> |
