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Furnace protection method for bottom blowing powder spraying converter

A converter and furnace protection technology, which is applied in the manufacture of converters, etc., can solve the problems of large bottom blowing gas volume, intensified furnace bottom erosion, strong stirring of molten pool, etc., and achieve the effect of ensuring erosion and improving the quality of converter protection

Pending Publication Date: 2021-08-13
GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to solve the problems existing in the prior art, to provide a method for protecting the bottom-blown powder-spraying converter, which solves the problem that the bottom-blowing powder-spraying gun system of the converter has a large amount of bottom blowing gas and strong stirring of the molten pool, which causes the bottom of the furnace to Problems exacerbated by erosion

Method used

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Embodiment Construction

[0010] The technical solutions of the present invention will be described below in conjunction with specific embodiments.

[0011] A furnace protection method for a bottom-blown powder-injected converter, comprising the following measures:

[0012] a. Bottom gun slag splashing: After the converter tapping is completed, adjust the flow valve of the bottom blowing lance to 50% of the opening, and the flow rate is 1440Nm 3 / h, splash slag on the furnace body, the operation time is 5 minutes, the furnace body stays at 0 degrees for 3 minutes, and the front and back of the furnace need to be tilted 30-50 degrees when in use;

[0013] b. Combined slag splashing of the top gun and the bottom gun: the spray holes of the top gun and the bottom gun need to be staggered to reduce mutual interference and avoid the blockage of the bottom gun. Among them, the top gun adopts the traditional slag splashing parameters, and the bottom gun flow valve is adjusted to open The speed is not lower t...

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Abstract

The invention provides a furnace protection method for a bottom blowing powder spraying converter. The furnace protection quality of a molten pool part of the converter can be effectively improved through the modes of bottom gun slag splashing, top gun and bottom gun combined slag splashing and bottom gun slag hanging; the steelmaking safety of the bottom blowing powder spraying converter is guaranteed; and the service life of a furnace lining of the bottom blowing powder spraying converter is prolonged.

Description

technical field [0001] The invention belongs to the technical field of mining and smelting, and relates to a furnace protection method for a bottom blowing powder spraying converter. Background technique [0002] In the steelmaking process of the bottom-blown powder-injection converter, due to the large amount of bottom blowing gas and strong stirring of the molten pool, the furnace bottom is affected by the high temperature of the oxygen fire point area, and the erosion is intensified. The location is a severely eroded area, and the maintenance of the furnace lining by conventional top lance slag splash protection is limited, which may easily cause the bottom of the furnace to rise, resulting in blockage of the bottom blowing lance. Contents of the invention [0003] The object of the present invention is to solve the problems existing in the prior art, to provide a method for protecting the bottom-blown powder-spraying converter, which solves the problem that the bottom-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/28C21C5/44C21C5/46
CPCC21C5/28C21C5/462C21C5/441
Inventor 王德勇张英嘉茹作栋韩志国王春江赵志银
Owner GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD