Method for producing thin gauge high carbon steel based on esp thin slab continuous casting and rolling process

A thin slab continuous casting, continuous casting and rolling technology, applied in the direction of manufacturing converters, etc., can solve the problems of high energy consumption and high hot rolling cost, and achieve the effects of low temperature, short rolling time and fast solidification speed.

Active Publication Date: 2018-11-09
RIZHAO STEEL HLDG GROUP
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of the above problems, the purpose of the present invention is to provide a method for producing thin-gauge high-carbon steel based on the ESP thin slab continuous casting and rolling process, so as to solve the problems of high cost and high energy consumption of traditional hot rolling, and achieve energy saving, environmental protection and cost reduction the goal of

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  • Method for producing thin gauge high carbon steel based on esp thin slab continuous casting and rolling process
  • Method for producing thin gauge high carbon steel based on esp thin slab continuous casting and rolling process
  • Method for producing thin gauge high carbon steel based on esp thin slab continuous casting and rolling process

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Embodiment 1

[0046] In the embodiment, the process of producing S355J0W steel by the full-endless ESP thin slab continuous casting and rolling process is iron mixing furnace → molten iron pretreatment → BOF → LF → ESP continuous casting and rolling → laminar cooling → coiling → slow cooling → finished product.

[0047] Converter smelting: 300t top-bottom double-blowing converter is used for smelting, and the molten iron is decarburized, dephosphorized and desulfurized in the converter. 0.009%, [S]0.006%, the tapping temperature is 1640°C, the tapping operation is carried out by sliding plate slag control, the amount of slag under the converter is controlled to 40mm, the tapping process adopts argon blowing, deoxidation alloying: add 200Kg of aluminum ingot, carburizer, Ferro-silicon, high-carbon ferrochromium, silicon-manganese alloying, top slag 1 ton.

[0048] LF refining: deoxidation, desulfurization, alloying, inclusion removal in LF furnace, LF refining slag (FeO) 0.55%, binary basic...

Embodiment 2

[0062] In the embodiment, the process of producing S355J0W steel by the full-endless ESP thin slab continuous casting and rolling process is iron mixing furnace → molten iron pretreatment → BOF → LF → ESP continuous casting and rolling → laminar cooling → coiling → slow cooling → finished product.

[0063] Converter smelting: 300t top-bottom double-blowing converter is used for smelting, and the molten iron is decarburized, dephosphorized and desulfurized in the converter. The end point of the converter is controlled at [C]0.12%, [Si]0.01%, [Mn]0.12%, [P] 0.008%, [S]0.0050%, the tapping temperature is 1650°C, the tapping operation is carried out by sliding plate slag control, the amount of slag lowered by the converter is controlled to 40mm, and the tapping process adopts argon blowing deoxidation alloying: add 230Kg of aluminum ingot, carburant, silicon Iron, high-carbon ferrochromium, silicon-manganese alloy, top slag 1.2 tons.

[0064] LF refining: deoxidation, desulfuriza...

Embodiment 3

[0078] In the embodiment, the process of producing S355J0W steel by the full-endless ESP thin slab continuous casting and rolling process is iron mixing furnace → molten iron pretreatment → BOF → LF → ESP continuous casting and rolling → laminar cooling → coiling → slow cooling → finished product.

[0079] Converter smelting: use 300t top-bottom combined blowing converter to smelt, decarburize, dephosphorize and desulfurize the molten iron in the converter, control the end point of the converter at [C]0.15%, [Si]0.01%, [Mn]0.15%, [P] 0.007%, [S]0.0045%, the tapping temperature is 1650°C, the tapping operation is carried out by sliding plate slag control, the amount of slag in the converter is controlled to 40mm, the tapping process adopts argon blowing, deoxidation and alloying: add 240Kg of aluminum ingots, carburizer, Ferro-silicon, high-carbon ferrochromium, silicon-manganese alloying, top slag 1.5 tons.

[0080] LF refining: deoxidation, desulfurization, alloying, inclusi...

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Abstract

The invention provides a method for producing a thin-specification high-carbon steel based on an ESP thin slab continuous casting and rolling procedure. The method comprises the steps of conducting pretreatment on molten iron, conducting converter smelting, conducting LF furnace refining, conducting ESP continuous casting and rolling, and conducting cooling, wherein decarburization, dephosphorization, desulfuration and oxidized alloy removal are conducted on the molten iron in a converter; in the process of LF furnace refining, deoxidization, desulfuration and occluded foreign substance removal are conducted in a LF furnace; the molten steel obtained through LF furnace refining comprises, by mass percentage, 0.48-0.54% of C, 0.15-0.25% of Si, 0.50-0.80% of Mn, 0.16-0.20% of Cr, less than or equal to 0.012% of P, less than or equal to 0.003% of S and less than or equal to 0.005% of N; the molten iron formed through LF furnace refining is made into hot rolled strip steels different in thickness through ESP continuous casting and rolling; the temperature of a rough rolling outlet is 900-960 DEG C, and the temperature of a finish rolling outlet is 800-860 DEG C; the hot rolled strip steels are cooled to 640-740 DEG C through laminar flow, and then the hot rolled strip steels enter a reeling machine for reeling; and after being cooled slowly, the hot rolled strip steels are delivered out of a warehouse. By means of the method, the problems that traditional hot rolling methods are high in cost and energy consumption, and atmospheric corrosion is caused are solved, and the purposes of energy conservation, environmental protection and cost reduction are achieved.

Description

technical field [0001] The invention relates to the technical field of metal material processing and forming, and more specifically relates to a method for producing thin-gauge high-carbon steel based on the ESP thin slab continuous casting and rolling process. Background technique [0002] In recent years, with the continuous decline of the steel market, steel has been in a state of meager or no profit, forcing steel manufacturers to explore ways to reduce costs. At present, the domestic emphasis on environmental protection has been further strengthened, and environmental protection requirements are unprecedentedly strict. Therefore, Exploring cost-reducing and environmentally friendly steel production processes has become a very necessary way of survival. [0003] Making full use of ESP to develop and apply new products is in line with the national overall planning and industry planning, in line with the relevant policies and regulations of the national transfer and creati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/18C22C33/06C21C5/28C21C7/06C21C7/064C21D8/02
CPCC21C5/28C21C7/06C21C7/064C21D8/0226C22C33/06C22C38/001C22C38/02C22C38/04C22C38/18
Inventor 朱经涛秦哲谢国海刘宏志狄丽华严进宝尚天傲罗继锋于长江喻尧谢基表王学伦陆显然徐由标安守勇孙庆强季伟斌
Owner RIZHAO STEEL HLDG GROUP
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