Stave, blast furnace, and blast furnace operation method

A cooling stave and vertical technology, applied in vertical furnaces, blast furnaces, cooling devices, etc., can solve the problems of wear and surface damage of vertical cooling staves, and achieve the effect of achieving stabilization and preventing the deterioration of the inner contour of the furnace.

Pending Publication Date: 2012-07-25
NIPPON STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, after a certain period of refractory bricks wear and disappear, the surface of the stave is damaged and worn

Method used

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  • Stave, blast furnace, and blast furnace operation method
  • Stave, blast furnace, and blast furnace operation method
  • Stave, blast furnace, and blast furnace operation method

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach 〕

[0068] exist figure 1 Among them, a blast furnace 1 has a cylindrical furnace body 2 constructed on a foundation base.

[0069] The furnace body 2 is cylindrical, and the gas collection mantel 3 at the upper part is sequentially divided into a furnace mouth part S1, a furnace body part S2, a furnace belly part S3, a furnace waist part S4, a tuyere part S5 and a furnace bottom part S6. Usually, the inner diameter of the shaft portion S2 expands downward, the inner diameter of the belly portion S3 becomes the largest diameter, and the inner diameter of the furnace waist portion S4 decreases downward.

[0070] In the furnace body 2 , usually a charging device is arranged on the gas collecting mantel 3 , and the blast furnace 1 is charged with a granular charge 4 by this charging device. As the charge 4 , an ore-based charge with a particle size of about 8 to 25 mm and a coke-based charge with a particle size of about 20 to 55 mm are charged alternately. As a result, massive ban...

no. 2 Embodiment approach 〕

[0157] exist Figure 12 , Figure 13 and Figure 14 , shows the second embodiment of the present invention.

[0158] The stave 20 for the furnace belly and the furnace belly of the present embodiment serves as a stave for the region S8 from the lower part of the furnace shaft S2 in the blast furnace 1 of the above-mentioned first embodiment to the furnace belly S3 and the furnace waist S4. 2C use. The structure of the blast furnace 1 is the same as that of the above-mentioned first embodiment, and the basic structure of the stave 20 installed on the furnace waist S4 and the belly S3 of this embodiment is the same as that of the furnace waist S4 and the belly S3 of the above-mentioned first embodiment. The stave 10 is the same. Therefore, description is abbreviate|omitted about the part common to the stave 10 of said 1st Embodiment, and a different part is demonstrated below.

[0159] exist Figure 12 , Figure 13 and Figure 14Among them, the stave 20 provided on the f...

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Abstract

Disclosed is a stave which is provided with a stave provided on the inner peripheries of the bosh and the belly of a blast furnace. The stave is provided with: a copper or copper-alloy stave body having a reference surface facing the internal space of the blast furnace; and a plurality of protrusions protruding from the reference surface toward the internal side of the blast furnace.

Description

technical field [0001] The present invention relates to a stave, a blast furnace provided with the stave, and an operating method of the blast furnace. [0002] this application claims priority based on Japanese Patent Application No. 2009-263589 for which it applied to Japan on November 19, 2009, and uses the content here. Background technique [0003] For existing blast furnaces, a structure in which staves are installed on the inner side of the iron shell and refractory bricks are arranged on the inner side is often used. The inner surface of the blast furnace is exposed to the high temperature in the furnace and is exposed to the charge falling in the furnace to be mechanically worn. In addition, after a certain period of time, the refractory bricks wear and disappear, and the surface of the stave is damaged and worn. In order to cope with such damage and wear, a structure in which recesses are arranged on the surface of the stave inside the furnace and a refractory or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B7/10C21B7/24
CPCC21B7/106C21B7/24F27B1/24F27D1/12C21B5/006C21B7/10
Inventor 阿南邦义中马俊之川冈浩二松冈芳幸本田基树
Owner NIPPON STEEL CORP
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