APPARATUS FOR CLEANING A HOT DIP GALVANIZED STEEL SHEET

• US 20130284219A1
• Filed: 06/05/2013
• Published: 10/31/2013
• Est. Priority Date: 01/26/2006
• Status: Abandoned Application

• Current Assignee: JFE Steel Corporation (JFE Holdings Incorporated)
• Original Assignee: JFE Steel Corporation (JFE Holdings Incorporated)
• Inventors: YONEDA, Satoshi, SUGANO, Takahiro
• Application Number:
  US13/910,664
• Publication Number:
  US 20130284219A1
• Time in Patent Office: Days
• US Class Current: 134/64.R
• CPC Class Codes: B08B 3/022 Cleaning travelling work B08B3/042 takes precedence
• CPC Class Codes: C23G 1/02 with acid solutions
• CPC Class Codes: C23G 3/023 by spraying

Abstract

An apparatus for cleaning a hot dip galvanized steel sheet including: a cleaning liquid spray nozzle which sprays a cleaning liquid to both surfaces of a strip-shaped hot dip galvanized steel sheet which was treated by surface oxidation and which is continuously traveling; and a pure water spray nozzle which sprays pure water to both surfaces of the hot dip galvanized steel sheet a position where the hot dip galvanized steel sheet travels 1 second or more after being sprayed with the cleaning liquid.

Claims

1. An apparatus for cleaning a hot dip galvanized steel sheet comprising:

a cleaning liquid spray nozzle which sprays a cleaning liquid to both surfaces of a strip-shaped hot dip galvanized steel sheet which was treated by surface oxidation and which is continuously traveling; and

a pure water spray nozzle which sprays pure water to both surfaces of the hot dip galvanized steel sheet at a position where the hot dip galvanized steel sheet travels 1 second or more after being sprayed with the cleaning liquid.

2. The apparatus for cleaning a hot dip galvanized steel sheet according to claim 1, further comprising an inverting roller to invert a traveling direction of the hot dip galvanized steel sheet, at a position between the spraying position of the cleaning liquid spray nozzle and the spraying position of the pure water spray nozzle.

3. The apparatus for cleaning a hot dip galvanized steel sheet according to claim 1, wherein both the cleaning liquid spray nozzle and the pure water spray nozzle are arranged in a single cleaning tank.

4. The apparatus for cleaning a hot dip galvanized steel sheet according to claim 3, further comprising:

a circulation tank which stores a diluted cleaning liquid prepared by mixing the cleaning liquid with the pure water in the single cleaning tank; and

a diluted cleaning liquid spray nozzle which sprays the diluted cleaning liquid in the circulation tank to both surfaces of the hot dip galvanized steel sheet.

5. The apparatus for cleaning a hot dip galvanized steel sheet according to claim 4, wherein the diluted cleaning liquid spray nozzle is located between a spraying position of the cleaning liquid spray nozzle and a spraying position of the pure water spray nozzle.