WO2019114184A1 - Procédé de coupe à augmentation d'effet et économie d'énergie pour ébauche d'acier de coulée continue - Google Patents

Procédé de coupe à augmentation d'effet et économie d'énergie pour ébauche d'acier de coulée continue Download PDF

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Publication number
WO2019114184A1
WO2019114184A1 PCT/CN2018/085996 CN2018085996W WO2019114184A1 WO 2019114184 A1 WO2019114184 A1 WO 2019114184A1 CN 2018085996 W CN2018085996 W CN 2018085996W WO 2019114184 A1 WO2019114184 A1 WO 2019114184A1
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WO
WIPO (PCT)
Prior art keywords
cutting
continuous casting
saving
energy
mpa
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PCT/CN2018/085996
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English (en)
Chinese (zh)
Inventor
代纪东
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代纪东
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Application filed by 代纪东 filed Critical 代纪东
Publication of WO2019114184A1 publication Critical patent/WO2019114184A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K7/00—Cutting, scarfing, or desurfacing by applying flames

Definitions

  • the invention relates to a continuous casting steel billet cutting method, in particular to a continuous casting steel billet synergetic energy-saving cutting method.
  • Flame cutting refers to the process of melting and slaging and dividing steel materials by mixing industrial gas and oxygen and achieving the temperature required for cutting.
  • the specific method is to use industrial gas to preheat the cut metal to a burning point capable of intense combustion, and then to release the high pressure oxygen stream to further violently oxidize the metal and blow off the slag generated by the combustion to form a slit.
  • the industrial gas used is propane gas, natural gas or blast furnace gas. In the process of use, it is found that the gas and oxygen are not sufficiently saved in the process of cutting the steel billet by the above industrial gas, and the steel loss is large.
  • the continuous casting of billets for international and domestic steel companies generally uses traditional cutting nozzles that have continued for decades.
  • the present invention provides a method for synergistic energy-saving cutting of cast steel billets.
  • a method for synergistic energy-saving cutting of continuous casting steel billet comprises the following steps:
  • the first step adjusting the distance between the cutting nozzle and the continuous casting billet
  • the second step preheating oxygen enters the cutting nozzle through the preheating oxygen channel, and the synergistic energy-saving gas enters the cutting nozzle through the synergistic energy-saving gas tunnel, and the cutting oxygen enters the cutting nozzle through the cutting oxygen channel;
  • the third step set the preheating oxygen pressure to 0.2-0.3 mpa, set the synergistic energy-saving gas pressure to 0.02-0.1 mpa, and set the cutting oxygen pressure to 1-1.2 mpa for cutting.
  • synergistic energy-saving gas is mixed from the following raw materials by weight: 99.1%-99.3% of natural gas, 7 ⁇ -9 ⁇ of synergist; the synergist comprises the following components by weight: low
  • the carbon alcohol is 35-45%, the higher alcohol is 25-35%, and the lower ester is 20-40%.
  • the lower alcohol is methanol.
  • the lower ester is ethyl acetate or methyl acetate.
  • the cutting nozzle comprises 12 holes or 21 holes, and the hole has a hole diameter of 0.6-0.8 mm.
  • the synergistic energy-saving gas pressure is set to 0.02-0.08 mpa.
  • the synergistic energy-saving gas pressure is set to 0.08-0.1 mpa.
  • the distance between the cutting tip and the continuous casting billet is set to 30-50 mm in the first step.
  • the cutting method of the invention can save more than 60% of gas, up to 80%, oxygen saving 40%, steel slit width reduced by about 50%, production efficiency increased by about 30%, carbon dioxide emissions reduced by more than 60%, and on-site smoke reduction 50%, the steel cutting surface is smooth, no undercut burning and slag, no carbonization and hardening phenomenon, the steel cutting section is beautiful.
  • Figure 1 is a schematic view showing the structure of a 12-hole cutting nozzle in the present invention.
  • Figure 2 is a schematic cross-sectional view showing a 12-hole cutting nozzle of the present invention.
  • Figure 3 is a schematic view showing the structure of a 21-hole cutting nozzle in the present invention.
  • Figure 4 is a schematic cross-sectional view showing the 21-hole cutting nozzle of the present invention.
  • a method for synergistic energy-saving cutting of continuous casting steel billet comprises the following steps:
  • the first step adjusting the distance between the cutting nozzle and the continuous casting billet is 30mm;
  • the second step preheating oxygen enters the cutting nozzle through the preheating oxygen channel 3, and the synergistic energy-saving gas enters the cutting nozzle through the synergistic energy-saving gas channel 1, and the cutting oxygen enters the cutting nozzle through the cutting oxygen channel 2;
  • the third step is to set the preheating oxygen pressure to 0.2 mpa, set the synergistic energy-saving gas pressure to 0.02 mpa, and set the cutting oxygen pressure to 1 mpa for cutting.
  • the synergistic energy-saving gas is obtained by mixing the following raw materials by weight: 99.1% of natural gas and 9 ⁇ of synergist; the synergist comprises the following components by weight: 35% of methanol, 25% of high carbon alcohol, Ethyl acetate 40%.
  • the cutting tip includes 12 holes whose aperture is set to 0.8 mm.
  • a method for synergistic energy-saving cutting of continuous casting steel billet comprises the following steps:
  • the first step adjusting the distance between the cutting nozzle and the continuous casting billet is 40mm;
  • the second step preheating oxygen enters the cutting nozzle through the preheating oxygen channel 3, and the synergistic energy-saving gas enters the cutting nozzle through the synergistic energy-saving gas channel 1, and the cutting oxygen enters the cutting nozzle through the cutting oxygen channel 2;
  • the third step is to set the preheating oxygen pressure to 0.25 mpa, set the synergistic energy-saving gas pressure to 0.05 mpa, and set the cutting oxygen pressure to 1.1 mpa for cutting.
  • the synergistic energy-saving gas is composed of the following raw materials by weight percentage: natural gas 99.2%, synergist 8 ⁇ ; the synergist comprises the following components by weight: 40% methanol, 30% high alcohol, Ethyl acetate 30%.
  • the cutting tip includes 12 holes whose aperture is set to 0.8 mm.
  • a method for synergistic energy-saving cutting of continuous casting steel billet comprises the following steps:
  • the first step adjusting the distance between the cutting nozzle and the continuous casting billet is 50mm;
  • the second step preheating oxygen enters the cutting nozzle through the preheating oxygen channel, and the synergistic energy-saving gas enters the cutting nozzle through the synergistic energy-saving gas tunnel, and the cutting oxygen enters the cutting nozzle through the cutting oxygen channel;
  • the third step is to set the preheating oxygen pressure to 0.3 mpa, set the synergistic energy-saving gas pressure to 0.1 mpa, and set the cutting oxygen pressure to 1.2 mpa for cutting.
  • the synergistic energy-saving gas is composed of the following raw materials by weight percentage: natural gas 99.2%, synergist 8 ⁇ ; the synergist comprises the following components by weight: 45% methanol, 35% high carbon alcohol, Ethyl acetate 20%.
  • the cutting tip comprises 21 holes whose aperture is set to 0.6 mm.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)

Abstract

L'invention concerne un procédé d'augmentation d'effet et d'économie d'énergie pour une ébauche d'acier de coulée continue, comprenant les étapes suivantes : étape 1, ajuster la distance entre une buse de coupe et l'ébauche d'acier de coulée continue ; étape 2, fournir de l'oxygène de préchauffage dans la buse de coupe grâce à un canal d'oxygène de préchauffage, fournir du gaz d'augmentation d'effet et d'économie d'énergie dans la buse de coupe grâce à un canal de gaz d'augmentation d'effet et d'économie d'énergie, et fournir de l'oxygène de coupe dans la buse de coupe grâce à un canal d'oxygène de coupe ; et étape 3, régler la pression de l'oxygène de préchauffage dans une plage de 0,2 à 0,3 MPa, la pression du gaz d'augmentation d'effet et d'économie d'énergie dans une plage de 0,02 à 0,1 MPa, et la pression de l'oxygène de coupe dans une plage de 1 MPa à 1,2 MPa pour la coupe. Selon le procédé de coupe, une économie de gaz de 60 % ou plus peut être réalisée, jusqu'à environ 80 %, une économie d'oxygène pouvant atteindre environ 40 % peut être réalisée, la largeur d'espacement de coupe d'acier est réduite d'environ 50 %, le rendement de production est amélioré d'environ 30 %, les émissions de dioxyde de carbone sont réduites d'au moins 60 %, la fumée sur le terrain est réduite d'environ 50 %, la surface de coupe d'acier est lisse et sans phénomènes d'affaissement de brûlure de caniveau et d'adhérence de scories, de recarburation et de durcissement, et la section de coupe d'acier est d'apparence esthétique.
PCT/CN2018/085996 2017-12-13 2018-05-08 Procédé de coupe à augmentation d'effet et économie d'énergie pour ébauche d'acier de coulée continue WO2019114184A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201711330137.3 2017-12-13
CN201711330137.3A CN108067702B (zh) 2017-12-13 2017-12-13 一种连铸钢坯增效节能切割方法

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WO2019114184A1 true WO2019114184A1 (fr) 2019-06-20

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WO (1) WO2019114184A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110713856B (zh) * 2019-10-25 2021-06-25 崔旭 一种以天然气为原料的火焰切割气
CN111001894A (zh) * 2019-11-11 2020-04-14 苏德祥 一种可进行切割质量判定的钢材节能切割方法

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JPS56134066A (en) * 1980-03-24 1981-10-20 Agency Of Ind Science & Technol Method and device for starting underwater gas cutting of extra-thick plate
JPS60162589A (ja) * 1984-01-11 1985-08-24 Mitsubishi Electric Corp レ−ザ切断加工装置
CN201285047Y (zh) * 2008-09-12 2009-08-05 廖怀武 节能天然气割嘴
CN102229826A (zh) * 2011-06-14 2011-11-02 济源济钢石油有限公司 一种金属切割气
CN103146446A (zh) * 2013-04-01 2013-06-12 贵州纳斯新能源技术有限公司 一种高效节能的天然气添加剂及其应用
CN103968387A (zh) * 2014-04-28 2014-08-06 中国科学技术大学 一种带有催化燃烧的燃气割嘴
CN104130813A (zh) * 2014-08-19 2014-11-05 叶万久 一种新型清洁高能切割焊接气体
CN105333431A (zh) * 2014-08-17 2016-02-17 西安格瑞德化工新材料有限公司 一种利用天然气和氧气混合火焰切割钢材的装置
CN106244270A (zh) * 2016-08-15 2016-12-21 谢光玉 一种用于切割金属的天然气

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CN103710061A (zh) * 2012-09-29 2014-04-09 天津滨海新区金火焰科技有限公司 一种天然气专用增效添加剂
CN102922079B (zh) * 2012-10-23 2014-08-27 秦皇岛首秦金属材料有限公司 一种大倒角铸坯切割快速开口的方法
CN203364133U (zh) * 2013-06-19 2013-12-25 上海骐瑄智能科技有限公司 一种改进的节能割嘴
KR20150007748A (ko) * 2013-07-12 2015-01-21 주식회사 포스코 피처리물 절단 장치 및 절단 방법
CN104668709A (zh) * 2013-11-28 2015-06-03 天津兴船重机装备有限公司 一种厚钢板切割工艺
CN103897761A (zh) * 2014-04-11 2014-07-02 盐城蓝色星球树脂材料有限公司 一种高效能燃气
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Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56134066A (en) * 1980-03-24 1981-10-20 Agency Of Ind Science & Technol Method and device for starting underwater gas cutting of extra-thick plate
JPS60162589A (ja) * 1984-01-11 1985-08-24 Mitsubishi Electric Corp レ−ザ切断加工装置
CN201285047Y (zh) * 2008-09-12 2009-08-05 廖怀武 节能天然气割嘴
CN102229826A (zh) * 2011-06-14 2011-11-02 济源济钢石油有限公司 一种金属切割气
CN103146446A (zh) * 2013-04-01 2013-06-12 贵州纳斯新能源技术有限公司 一种高效节能的天然气添加剂及其应用
CN103968387A (zh) * 2014-04-28 2014-08-06 中国科学技术大学 一种带有催化燃烧的燃气割嘴
CN105333431A (zh) * 2014-08-17 2016-02-17 西安格瑞德化工新材料有限公司 一种利用天然气和氧气混合火焰切割钢材的装置
CN104130813A (zh) * 2014-08-19 2014-11-05 叶万久 一种新型清洁高能切割焊接气体
CN106244270A (zh) * 2016-08-15 2016-12-21 谢光玉 一种用于切割金属的天然气

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