Title:
CONCENTRATION DETECTION METHOD AND CONCENTRATION DETECTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2024/062552
Kind Code:
A1
Abstract:
Provided is a method for detecting an Fe2+ ion concentration and/or an Fe3+ ion concentration in an acidic solution for pickling a material to be rolled, wherein the Fe2+ ion concentration and/or the Fe3+ ion concentration is determined on the basis of: a relational expression (1) of the Fe2+ ion concentration which is a function of an electrical conductivity EC, a specific gravity d, and a hydrochloric acid concentration in the acidic solution; a relational expression (2) of the Fe3+ ion concentration which is a function of the electrical conductivity EC, the specific gravity d, and the hydrochloric acid concentration in the acidic solution; a relational expression (3) of an oxidation reduction potential ORP which is a function of the Fe2+ ion concentration, the Fe3+ ion concentration, and the hydrochloric acid concentration in the acidic solution; and the electrical conductivity EC, the specific gravity d, and the oxidation reduction potential ORP which are measured of the basis of the acidic solution during pickling.
Inventors:
NAKATSUKA RYUSUKE (JP)
TSUJI KOSEI (JP)
NAKANO TAKASHI (JP)
MAEHASHI YUKI (JP)
YOSHIKAWA MASASHI (JP)
TSUJI KOSEI (JP)
NAKANO TAKASHI (JP)
MAEHASHI YUKI (JP)
YOSHIKAWA MASASHI (JP)
Application Number:
PCT/JP2022/035163
Publication Date:
March 28, 2024
Filing Date:
September 21, 2022
Export Citation:
Assignee:
PRIMETALS TECH JAPAN LTD (JP)
International Classes:
C23G1/08
Foreign References:
| JPH101791A | 1998-01-06 | |||
| JP2007162106A | 2007-06-28 | |||
| JP2000313978A | 2000-11-14 |
Attorney, Agent or Firm:
OBA, Mitsuru et al. (JP)
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