Mitsubishi Heavy Industries Limited

Masato Saka

Nobuyuki Taniguchi

Etsuro Hirai

Takumi Furuya

An acid pickling tank is filled with an acid liquid L, and a lid is attached to the acid pickling tank . A central part of the lid is depressed downwards to form a covering portion . The covering portion is located at a lower position than the liquid level of the acid liquid L in the acid pickling tank to cover a free surface of the acid liquid L. Immersion guide rolls to are provided on the covering portion , support blocks to are provided at the bottom of the acid pickling tank , and skids to are provided on the support blocks to via a bottom plate . Thus, the free surface of the acid liquid L in the acid pickling tank is decreased to suppress a loss of the acid, and prevent an overflow of the acid liquid L to the outside of the tank, thereby making acid pickling of the strip steel plate S efficient.

Pickling device

An acid pickling tank body,is partitioned with a partition wall,into a first tank,and a second tank,. The first tank,and the second tank,are filled with acid liquids L,and L,, respectively, of different concentrations. A lid,is attached to the top of the acid pickling tank body,. On the lid,, immersion guide rolls,to,to,are mounted. On the bottom surface of the first tank,and the second tank,, skids,to,to,are mounted via support blocks,to,to,. A liquid seal,is provided which has a cushion nozzle,for jetting the acid liquids L,and L,toward the surface of a strip steel plate S. traveling above the partition wall,for the first tank,and the second tank

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Hiroshima, Japan

Masato Saka