CN214458140U

CN214458140U - Converter bottom structure

Info

Publication number: CN214458140U
Application number: CN202120522714.4U
Authority: CN
Inventors: 肖邦志; 卢震亚; 梁明强; 杨文军; 周利刚; 张泰然; 邓伟; 邓志方
Original assignee: Wuhan Iron and Steel Co Ltd
Current assignee: Wuhan Iron and Steel Co Ltd
Priority date: 2021-03-12
Filing date: 2021-03-12
Publication date: 2021-10-22
Anticipated expiration: 2031-03-12

Abstract

A converter bottom structure sequentially comprises a metal shell, a refractory castable layer and a working layer from outside to inside, wherein the refractory castable layer, the refractory castable layer and the working layer are arranged on the metal shell, the working layer comprises air bricks and magnesia carbon bricks, the thickness of the magnesia carbon bricks arranged around the air bricks in the working layer is equal to that of the air bricks, and the magnesia carbon bricks are arranged around the air bricks. The utility model discloses an improve converter bottom construction to the protection air brick is decreased, increases the life cycle of air brick, and the converter bottom is maintained once by original use about 3500 times and is increased to the use and just maintain once not less than 5000 times, maintains the number of times and is showing the reduction, and the maintenance cost can reduce.

Description

Converter bottom structure

Technical Field

The utility model relates to a steelmaking converter, which belongs to a steelmaking converter bottom structure exactly.

Background

The design and arrangement of the air brick at the bottom of the top-bottom combined blown converter are used for realizing bottom blowing air supply. The thickness of the air brick designed and laid at present is larger than that of the magnesia carbon brick laid at the bottom of the furnace. Some steel plants directly adopt the design that the thickness of the air brick is 10cm higher than that of the magnesia carbon brick at the bottom of the furnace. The design of only increasing the thickness of the magnesia carbon brick has the problem that when scrap steel is added in steel making, the air brick is impacted by the scrap steel to break, and the converter cannot normally perform bottom blowing in serious conditions to influence production. According to statistics, the converter is maintained after the conventional furnace bottom structure can be used for 3500 times on average, so that normal production is ensured.

After retrieval:

the Chinese patent application No. CN200910017406.X discloses a bottom blowing air brick of a top-bottom combined blown converter and an installation structure thereof. This document takes a technical measure of providing a magnesia carbon brick structure having the same thickness as the air brick only on one side of the air brick. The design of the furnace bottom structure is difficult to solve the problem of impact of the scrap steel on the air brick when the scrap steel is added. Because the addition amount of the added waste steel is large, an operator cannot see the direction of the magnesia carbon brick with the same thickness as the air brick, and the air brick can hardly avoid the impact of the waste steel.

SUMMERY OF THE UTILITY MODEL

The utility model discloses lie in overcoming the above-mentioned not enough that prior art exists, provide one kind through improving converter bottom structure to the protection air brick is decreased, increases the life cycle of air brick, reduces the maintenance number of times of converter, and the converter bottom just must be maintained once by original use about 3500 times and increases to use and is not less than 5000 times just maintain converter bottom structure once.

The measures for realizing the aim are as follows:

the utility model provides a converter bottom construction, from the extroversion inwards constitute by refractory castable layer, refractory castable layer and working layer on metal-back, the metal-back in proper order, and the working layer comprises air brick and magnesia carbon brick one, and it lies in: in the working layer, the thickness of the magnesia carbon brick II paved around the air brick is equal to that of the air brick by taking the air brick as the center.

And further, 4 or 8 magnesia carbon bricks are paved around the air brick.

The utility model discloses an so take and be using the air brick as the center, the thickness and the air brick isopachous of the magnesia carbon brick two of laying around the air brick is because this kind of structure can effectively protect the air brick, thereby avoids receiving the impact when adding the scrap steel and impaired condition can improve the life cycle of air brick, reduces the maintenance number of times at the converter bottom.

Compared with the prior art, the utility model, through improving converter bottom construction to the protection air brick is decreased, increases the life cycle of air brick, and the converter bottom is maintained once by original use month 3500 and is increased to the use and is not less than 5000 just maintain once, maintains the number of times and is showing the reduction, and the maintenance cost can reduce.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic top view of 8 magnesia carbon bricks II arranged in FIG. 1;

FIG. 3 is a schematic top view of the second magnesia carbon brick of FIG. 1 with 4 bricks;

in the figure: 1-metal shell, 2-refractory castable layer, 3-working layer, 4-air brick, 5-magnesia carbon brick I, 6-magnesia carbon brick II.

Detailed Description

The present invention is described in detail below with reference to the attached drawings:

a converter bottom structure sequentially comprises a metal shell 1, a refractory castable layer 2 and a working layer 3 from outside to inside, wherein the refractory castable layer 2, the refractory castable layer 2 and the working layer 3 are arranged on the metal shell 1, the working layer 3 comprises air bricks 4 and magnesia carbon bricks one 5, the magnesia carbon bricks two 6 are laid around the air bricks 4 in the working layer 3 by taking the air bricks 4 as the center, the thickness of the magnesia carbon bricks two 6 is equal to that of the

air bricks

4, and 4/8 magnesia carbon bricks two 5 are laid according to the existing size.

The geometric dimension of the prior air brick 4 is as follows: length X width X thickness =1045mm 160mm 100 mm;

after 6000 trials, the phenomenon of impact damage of the waste steel is not found in the air brick 4.

The above examples are merely preferred examples and are not intended to be exhaustive of the invention.

Claims

1. The utility model provides a converter bottom construction, from the extroversion inwards constitute by refractory castable layer, refractory castable layer and the working layer on metal-back, the metal-back in proper order, and the working layer comprises air brick and magnesia carbon brick one, its characterized in that: in the working layer, the thickness of the magnesia carbon brick II paved around the air brick is equal to that of the air brick by taking the air brick as the center.

2. The converter bottom structure of claim 1, wherein: and 4 or 8 magnesia carbon bricks are paved around the air brick II.