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Patent Searching and Data


Title:
MECHANICAL STIRRING-TYPE DESULFURIZATION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2021/070455
Kind Code:
A1
Abstract:
[Problem] To provide a mechanical stirring-type desulfurization system which is capable of detecting the level of the surface of a bath of hot metal using a simple method and automatically adjusting a lance to the optimum position in accordance with the detected bath surface level. [Solution] The present invention is characterized by comprising a control unit 14 that controls movement such that the tip end of a top lance 10 reaches a position at a prescribed height from the surface of the bath in a hot metal ladle 2, wherein the control unit 14 is provided with: a movement distance calculating means that calculates the freeboard ΔH of the hot metal ladle 2 from the inner diameter D of the hot metal ladle 2 and the inclination angle of the hot metal ladle 2 during slag removal, which is a pretreatment before desulfurization, and calculates a movement distance L for the top lance on the basis of the calculated freeboard; and a lance driving means that, on the basis of the calculated movement distance L, drives the top lance 10 such that the tip end of the top lance reaches a position at a prescribed height from the bath surface in the hot metal ladle 2.

Inventors:
HAMADA TAKANOBU (JP)
YOSHIZAWA MASAKATSU (JP)
YASUI YOSHIAKI (JP)
Application Number:
JP2020/029133
Publication Date:
April 15, 2021
Filing Date:
July 29, 2020
Export Citation:
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Assignee:
DIAMOND ENG CO LTD (JP)
International Classes:
B22D27/20; C21C7/064; C21C7/072; F27D3/16
Attorney, Agent or Firm:
IGARASHI Sadaki (Hijirigaoka Tama-sh, Tokyo 22, JP)
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