The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 20, 2011
Filed:
Jul. 15, 2004
Aimo Järvinen, Kokkola, FI;
Kai Judin, Alaviirre, FI;
Harri Natunen, Kokkola, FI;
Yrjö Oinonen, Kokkola, FI;
Panu Talonen, Kokkola, FI;
Aimo Järvinen, Kokkola, FI;
Kai Judin, Alaviirre, FI;
Harri Natunen, Kokkola, FI;
Yrjö Oinonen, Kokkola, FI;
Panu Talonen, Kokkola, FI;
Outotec Oyj, Espoo, FI;
Abstract
The invention relates to a method and apparatus for controlling a continuous metal removal in conjunction with a zinc preparation process, in which the metal removal is performed in one or more reactors (-), in conjunction with the reactor, the redox potential (-) and the acidity and/or basicity are measured, and based on the measurement results, the process variables (-) of the metal removal are adjusted towards the desired direction. According to the invention, the redox potential measurements (-) are performed from the sludge produced in the reactor in conjunction with the outlet pipe of the reactor outside the reactor, and the measuring instrument (-) is purified at predetermined intervals.