US 12,241,685 B2
Device and method for controlling a reheating furnace
Yee Yuen Chan, Maisons-Alfort (FR); and Jean-Luc Magalhaes, Boissy-sans-Avoir (FR)
Assigned to FIVES STEIN, (FR)
Appl. No. 17/771,885
Filed by FIVES STEIN, Maisons-Alfort (FR)
PCT Filed Oct. 7, 2020, PCT No. PCT/FR2020/051762
§ 371(c)(1), (2) Date Apr. 26, 2022,
PCT Pub. No. WO2021/084174, PCT Pub. Date May 6, 2021.
Claims priority of application No. 1912077 (FR), filed on Oct. 28, 2019.
Prior Publication US 2022/0404098 A1, Dec. 22, 2022
Int. Cl. F27B 9/40 (2006.01); F27D 19/00 (2006.01); F27D 21/02 (2006.01); F27B 9/20 (2006.01)
CPC F27B 9/40 (2013.01) [F27D 19/00 (2013.01); F27D 21/02 (2013.01); F27B 9/20 (2013.01); F27D 2019/0003 (2013.01); F27D 2019/0065 (2013.01); F27D 2021/026 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method for controlling a furnace for reheating iron and steel products having an inlet and an outlet in a reeling-off direction of the product, comprising:
forming an infrared image, using an infrared camera, of an upper face of a product over the width and at least partially over the length thereof when said product is arranged on a predetermined discharging surface;
digital processing comprising binarization of the infrared image into two classes of pixels, one class of pixels that corresponds to the pixels associated with the presence of scale that is bonded on the face of the product and the other class of pixels that corresponds to the pixels associated with the presence of scale that is not bonded on the upper face of the product;
determining the amounts of non-bonded scale and of bonded scale on the upper face of the product on the basis of the binarized image;
modifying furnace control parameters on the basis of the determined amounts of non-bonded scale and bonded scale.