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Method for thermally replacing furnace bottom of high-flow top-bottom combined blown converter

A top-bottom re-blowing, high-flow technology, applied in the direction of manufacturing converters, etc., can solve the problems of loss of re-blowing effect and bottom blowing shutdown, and achieve the effect of improving converter operation rate, reducing occupied time, and reducing production costs.

Inactive Publication Date: 2022-03-18
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Claims
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Problems solved by technology

[0007] In order to overcome the deficiencies in the prior art and solve the technical problem of closing the bottom blowing and losing the effect of reblowing in the carbon steel smelting top and bottom reblowing converter due to the erosion of the furnace bottom gun, the present invention provides a large flow top and bottom reblowing converter Method of Hot Replacement Furnace Bottom

Method used

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  • Method for thermally replacing furnace bottom of high-flow top-bottom combined blown converter

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Embodiment Construction

[0031] The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention. Unless otherwise specified, the examples are all in accordance with conventional experimental conditions. In addition, for those skilled in the art, on the premise of not departing from the spirit and scope of the present invention, various modifications or improvements to the material components and dosage in these embodiments all belong to the protection scope of the present invention.

[0032] Such as figure 1 A method for thermally replacing the furnace bottom of a large-flow top-bottom compound-blowing converter shown includes the following steps:

[0033] S1. Furnace shutdown: When the erosion thickness of the bottom of the large-flow top-bottom combined blowing furnace reaches the replacement standard, the furnace is shut down to prepare for hot replacement of the old bottom; There is no need for slag splashing to protect the fu...

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Abstract

The invention discloses a method for thermally replacing a furnace bottom of a high-flow top-bottom combined blown converter, belongs to the technical field of converter steelmaking, and solves the technical problems of bottom blowing closing and combined blowing effect loss caused by erosion of a bottom gun at the furnace bottom of a carbon steel smelting top-bottom combined blown converter. Comprising the following steps: blowing down a furnace; dismounting a gas distribution pipe connected with a bottom gun of an old furnace bottom; dismounting the old furnace bottom; cleaning a residual furnace lining at the combined part of a furnace body and the furnace bottom; filling a repairing material into a circular seam at the connecting part of the new furnace bottom and the furnace body; baking the furnace bottom and the circular seam material; finishing hot replacement of the new furnace bottom, and recovering smelting of the converter. Full-furnace-service large-flow bottom blowing smelting can be achieved, steel material consumption of the converter is remarkably reduced, production cost is reduced, one set of furnace body is matched with 2-3 sets of furnace bottoms, the service life of the converter can reach the high level of 8000-10000 times, refractory materials of the furnace body can be fully utilized, the turnover occupation time of the converter is shortened, and the converter operation rate can be improved.

Description

technical field [0001] The invention belongs to the technical field of converter steelmaking, and in particular relates to a method for heat replacement of the furnace bottom of a large-flow top-bottom combined blowing converter. Background technique [0002] The oxygen top-bottom combined blowing converter steelmaking technology invented in the mid-1970s is the most significant steelmaking technological progress since the invention of the converter steelmaking technology. Smelting end slag oxidation and many other advantages. Usually under the same conditions, the consumption of iron and steel materials in the top-bottom combined-blown converter (the top-bottom combined-blown converter referred to in the present invention refers specifically to the stirring type double-blown converter with bottom-blown inert gas) is about 5-10kg / t lower than that of the top-blown converter, The smelting time can be shortened by 1-3 minutes. [0003] With the rapid development of China's i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/35C21C5/44C21C5/48
CPCC21C5/35C21C5/48C21C5/441
Inventor 刘卫东王建昌赵建伟陈洋
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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