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A Method for Controlling Bottom Rise of Dephosphorization Furnace

A furnace bottom rise and dephosphorization furnace technology, applied in the direction of manufacturing converters, etc., can solve problems such as affecting the bottom blowing effect and furnace bottom rising.

Active Publication Date: 2019-06-04
SHOUGANG JINGTANG IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The embodiment of the present application provides a method for controlling the rise of the bottom of the dephosphorization furnace, which solves the technical problem in the prior art that the bottom of the furnace rises as a whole and affects the bottom blowing effect.

Method used

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  • A Method for Controlling Bottom Rise of Dephosphorization Furnace
  • A Method for Controlling Bottom Rise of Dephosphorization Furnace

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Embodiment 1

[0026] This embodiment provides a method for controlling the rising of the bottom of the dephosphorization furnace, such as figure 1 shown, including:

[0027] Step S101: During the smelting process of semi-steel in the dephosphorization furnace, oxygen lance blowing is used.

[0028] Step S102: In the later stage of blowing, lower the blowing lance position of the oxygen lance.

[0029] Step S103: controlling the impact depth of the oxygen stream generated by the oxygen lance on the molten pool of the dephosphorization furnace to a preset depth, so as to control the thickness of the furnace bottom to be stable within a predetermined range.

[0030] As an optional implementation, the oxygen lance is a four-hole oxygen lance.

[0031] As an optional implementation, the nozzle parameters of the oxygen lance are: center inclination angle 13°-14°, Mach number 2.10-2.20.

[0032] For example, the central inclination angle can be: 13.0°, or 13.1°, or 13.2°, or 13.3°, or 13.4°, or...

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Abstract

The invention discloses a method for controlling rising of a converter bottom of a dephosphorization converter. The method includes the steps that an oxygen lance is used for blowing in the semi-steel smelting process of the dephosphorization converter; in the later period of blowing, the smelting lance position of the oxygen lance is lowered; and the impact depth of oxygen streams on a molten pool of the dephosphorization converter is the preset depth and therefore the thickness of the converter bottom is stabilized to be in a preset range, and the oxygen streams are generated by the oxygen lance. By means of the method, the thickness of the converter bottom of the converter can be stably controlled, the bottom blowing effect of the converter is ensured, good dynamic conditions are provided for the dephosphorization converter, the semi-steel phosphorus content is reduced, and conditions are created for subsequent stable production of decarbonization converters.

Description

technical field [0001] The invention relates to the technical field of converter steelmaking, in particular to a method for controlling the bottom rise of a dephosphorization furnace. Background technique [0002] In the smelting process of semi-steel in dephosphorization furnace, a good kinetic basis is the prerequisite for smelting low-phosphorus semi-steel, that is, the kinetic condition is better than the thermodynamic condition in the smelting process of dephosphorization furnace. The good bottom blowing effect in the semi-steel smelting process can ensure the effective dynamic stirring of the molten pool, improve the mass transfer coefficient of the solute, promote the full mixing of steel slag, and increase the reaction interface area. [0003] However, due to the low-temperature smelting characteristics of the dephosphorization furnace, the viscosity of molten iron and slag is relatively high under low temperature conditions, and the overall fluidity is poor. The bo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/34C21C5/46
CPCC21C5/34C21C5/4606
Inventor 罗磊刘延强袁天祥赵长亮高宠光郭小龙张新国丁立丰安兰士梅宁安泽秋
Owner SHOUGANG JINGTANG IRON & STEEL CO LTD
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