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Steel-making method and application thereof and continuous casting method

A technology of molten steel and steel types, applied in the field of continuous casting, which can solve the problems of long heating time of LF furnace, increased energy consumption, long time of steelmaking process, etc.

Inactive Publication Date: 2013-06-19
PANGANG GRP PANZHIHUA STEEL & VANADIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, often due to the limitation of the site and the complexity of the process line, ladle transport vehicles, turntables, cranes, etc. are often required from the upper process to the next process, so there is a longer process time for the steelmaking process. The temperature drop in the process is large, and the heating time of the LF furnace is long, which leads to the increase of energy consumption and other problems

Method used

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  • Steel-making method and application thereof and continuous casting method
  • Steel-making method and application thereof and continuous casting method
  • Steel-making method and application thereof and continuous casting method

Examples

Experimental program
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preparation example Construction

[0044] The preparation method of the mold powder is well known to those skilled in the art, for example, it can be pre-melted slag or mechanically mixed slag, wherein: CaO can be derived from pre-melted slag, wollastonite, cement clinker and other CaO-containing Material; SiO 2 Can be derived from pre-melted slag, wollastonite, cement clinker, quartz sand, feldspar, etc. containing SiO 2 Material; Al 2 O 3 It can be derived from pre-melted slag, bauxite, cement clinker, white mud, etc. containing Al 2 O 3 Material; Na 2 O can come from pre-melted slag, Na 2 CO 3 Wait for Na 2 O's material; F - Can be derived from pre-melted slag, CaF 2 (Fluorite) etc. containing F - C can be derived from materials containing C such as carbon black, graphite and coke.

[0045] According to the present invention, the surface of the molten steel is condensed into a hard shell through the cooling of the crystallizer, the molten steel with the hard shell is continuously drawn from the outlet of the crys...

Embodiment 1

[0052] The mold powder used in Example 1 contains CaO and SiO 2 , Al 2 O 3 , MgO, MnO, Na 2 O, CaF 2 , C, wherein, based on the total weight of the mold powder, the content of CaO is 18% by weight, SiO 2 The content is 30% by weight, the Al 2 O 3 The content of MnO is 10% by weight, the content of MgO is 1% by weight, the content of MnO is 2% by weight, Na 2 The content of O is 7% by weight, CaF 2 The content of C is 7% by weight, and the content of C is 25% by weight. The basicity of the mold powder is 0.6, the melting point is 980-1020°C, and the viscosity is 0.1-0.2 Pa·S.

Embodiment 2

[0053] The mold powder used in Example 2 contains CaO and SiO 2 , Al 2 O 3 , MgO, MnO, Na 2 O, CaF 2 , C, wherein, based on the total weight of the mold powder, the content of CaO is 22% by weight, and SiO 2 The content is 28% by weight, the Al 2 O 3 The content of MnO is 9% by weight, the content of MgO is 2% by weight, the content of MnO is 4% by weight, Na 2 The content of O is 6% by weight, CaF 2 The content of C is 6% by weight, and the content of C is 23% by weight. The basicity of the mold powder is 0.78, the melting point is 980-1020°C, and the viscosity is 0.1-0.2 Pa·S.

[0054] The tundish covering agent used in the following Examples 1-2 contains CaO, SiO 2 , Al 2 O 3 , MgO and CaF 2 , Based on the total weight of the tundish covering agent, the content of the CaO is 45% by weight, the SiO 2 The content is 6% by weight, the Al 2 O 3 The content of MgO is 37% by weight, the content of MgO is 5% by weight, and the CaF 2 The content is 7% by weight.

[0055] Example 1

[0056...

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Abstract

The invention discloses a steel-making method and an application thereof and a continuous casting method, wherein the method comprising the following steps: firstly, a converter can be used for an primary making and then molten steel obtained from the primary making can be tapped in a steel ladle; secondly, in a steel tapping process, before steel is alloyed, the molten steel can be in recarburization and in selective deoxidization so as to regard total weight of the molten steel as a basic standard and activated oxygen contents of the molten steel is less than or equal to 100 parts per million (ppm); a slag foaming agent can be added to absorb impurities in the molten steel and gas evolution of the slag foaming agent is larger and equal to 90 liters per kilogram; thirdly, after the steel tapping argon can be blew into the molten steel of the steel ladle so that the molten steel can be in thermoregulation process; an selective feeding aluminum and a selective feeding carbon can be carried out according to ingredients of the molten steel so as to regard the total weight of the molten steel as the basic standard and the activated oxygen contents of the molten steel is less than and equal to the 50 ppm and carbon content of the molten steel can be adjusted as a middle limitation of ingredient demands of steel types. According to steel-making method and the application and the continuous casting method, the steel-making method which is provided can be used for accurately controlling the ingredients of the molten steel and regulating rhythms of making steel. The steel-making method is short in process time, small in temperature fall degree and low in energy consumption.

Description

Technical field [0001] The invention relates to a steelmaking method and its application as well as a continuous casting method. Background technique [0002] Traditional steelmaking process usually includes converter steelmaking, argon station blowing argon, LF furnace refining, RH vacuum refining and other steps. However, the traditional steelmaking production process has irreplaceable advantages in the quality control of high-quality steel. For example, LF furnace is used for slagging refining and temperature adjustment treatment, and RH vacuum refining treatment can be used to further remove inclusions and fine adjustment of alloy composition. figure 1 The schematic diagram of the traditional steelmaking process shown. However, in the smelting of some ordinary steels, it is generally not necessary to use RH vacuum refining treatment, nor to use LF furnace for slagging refining, but only use LF furnace as a heating tool for temperature control. Therefore, due to site restrict...

Claims

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Application Information

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IPC IPC(8): C21C5/28C21C7/06C21C7/00
Inventor 李盛黄登华陈怀杰李利刚聂绍刚雷辉彭琦
Owner PANGANG GRP PANZHIHUA STEEL & VANADIUM
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