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Title:
EFFECT-INCREASING AND ENERGY-SAVING CUTTING METHOD FOR CONTINUOUS CASTING STEEL BLANK
Document Type and Number:
WIPO Patent Application WO/2019/114184
Kind Code:
A1
Abstract:
An effect-increasing and energy-saving cutting method for a continuous casting steel blank, comprising the following steps: step 1, adjusting the distance between a cutting nozzle and the continuous casting steel blank; step 2, feeding preheat oxygen into the cutting nozzle by means of a preheat oxygen channel, feeding effect-increasing and energy-saving gas into the cutting nozzle by means of an effect-increasing and energy-saving gas channel, and feeding cutting oxygen into the cutting nozzle by means of a cutting oxygen channel; and step 3, setting the pressure of the preheat oxygen to range from 0.2 mpa to 0.3 mpa, the pressure of the effect-increasing and energy-saving gas to range from 0.02 mpa to 0.1 mpa, and the pressure of the cutting oxygen to range from 1 mpa to 1.2 mpa for cutting. According to the cutting method, the gas can be saved by 60% or more, up to about 80%, oxygen can be saved by about 40%, the steel cutting gap width is reduced by about 50%, the production efficiency is improved by about 30%, carbon dioxide emission is reduced by 60% or more, field smoke is reduced by about 50%, the steel cutting surface is smooth and free of phenomena of undercut burning collapse and adhering slag, re-carburization and hardening, and the steel cutting section is attractive in appearance.

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Inventors:
DAI JIDONG (CN)
Application Number:
PCT/CN2018/085996
Publication Date:
June 20, 2019
Filing Date:
May 08, 2018
Export Citation:
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Assignee:
DAI JIDONG (CN)
International Classes:
B23K7/00
Foreign References:
CN201285047Y2009-08-05
CN105333431A2016-02-17
CN103968387A2014-08-06
CN103146446A2013-06-12
CN104130813A2014-11-05
CN106244270A2016-12-21
CN102229826A2011-11-02
JPS56134066A1981-10-20
JPS60162589A1985-08-24
Attorney, Agent or Firm:
BTA INTELLECTUAL PROPERTY AGENCY CO., LTD (CN)
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