CN217418744U

CN217418744U - Open hearth for shortening converter masonry period

Info

Publication number: CN217418744U
Application number: CN202123036405.5U
Authority: CN
Inventors: 吴宝明; 王建林; 张瑞煊; 蔡学惠
Original assignee: Baotou Iron and Steel Group Co Ltd
Current assignee: Baotou Iron and Steel Group Co Ltd
Priority date: 2021-12-06
Filing date: 2021-12-06
Publication date: 2022-09-13
Anticipated expiration: 2031-12-06

Abstract

The utility model provides an open hearth for shortening the masonry period of a converter, belonging to the technical field of metallurgical equipment. The open hearth comprises an open hearth body arranged above a furnace shell of a converter body; the flat furnace mouth body comprises a plane structure formed by enclosing 4 converter mouth guard plates; the converter mouth guard plate is connected with a converter mouth flange plate arranged above the converter body shell, and the converter mouth guard plate is positioned above the converter mouth flange plate; the furnace shell of the converter body is filled with refractory materials consisting of magnesia carbon bricks and magnesia. The utility model provides a shorten open hearth furnace mouth of converter cycle of building by laying bricks or stones can reduce the use amount of resistant material, and converter cycle of building by laying bricks or stones shortens when resistant material cost reduction.

Description

Open hearth for shortening converter masonry period

Technical Field

The utility model relates to a metallurgical equipment technical field especially relates to an open hearth that shortens converter cycle of building by laying bricks or stones.

Background

The converter is one of the indispensable main equipments in the metallurgical industry, and the converter shell is generally composed of four parts, namely, a furnace bottom, a furnace body, a furnace cap and a furnace opening. The inside refractory material that adopts the refractory material to build by laying bricks or stones, outside use fire door backplate fixed refractory material, fire door backplate generally adopts cambered surface cast steel plate, and the inboard refractory material of cambered surface cast steel plate uses triangle magnesia carbon brick to fill. The converter mouth guard plate is characterized by large size, large replacement difficulty, large replacement workload, severe replacement working environment, about 1400 ℃ of the temperature in the converter, waiting for the temperature of the converter mouth to be reduced to meet the temperature which can be born by operators when the converter mouth guard plate is replaced, waiting for 2-3 hours, long replacement period, and about 10-12 hours of replacement period, thus seriously restricting the production operation rate.

The open hearth structure has the following defects:

in the early stage of production of a new converter, careful operation is needed, the oxidizability of the slag is well controlled, the slag pouring time in the early stage is well controlled, and the high-temperature and high-oxidizability steel slag is prevented from burning and leaking the furnace mouth guard plate, particularly the lower edge of the furnace mouth guard plate and the bolt part. Along with continuous production, after steel slag is bonded on the furnace mouth guard plate, the furnace mouth guard plate can be effectively prevented from being burnt and leaked.

SUMMERY OF THE UTILITY MODEL

In view of this, in order to solve the deficiencies existing in the background art, the utility model provides an open hearth that shortens the converter masonry cycle, can reduce the use amount of refractory material, and the converter masonry cycle shortens when refractory material cost reduces.

In order to achieve the above object, the utility model provides a following technical scheme:

an open hearth for shortening the masonry cycle of a converter comprises an open hearth body arranged above a converter shell of a converter body;

the flat furnace mouth body comprises a plane structure formed by enclosing 4 converter mouth guard plates;

the converter mouth guard plate is connected with a converter mouth furnace shell flange plate arranged above the converter body furnace shell, and the converter mouth guard plate is positioned above the converter mouth furnace shell flange plate;

and a refractory material consisting of common magnesia carbon bricks and magnesia at the furnace mouth is filled in the furnace shell of the converter body.

Preferably, the converter mouth guard plate is connected with the converter mouth furnace shell flange plate through a bolt.

Preferably, the number of the bolts is 40.

Preferably, the furnace shell flange plate of the converter mouth is welded with the furnace shell of the converter body.

Preferably, the converter mouth guard plate is a plane cast steel plate.

The utility model discloses relative and prior art, following beneficial effect has:

the utility model provides a shorten open hearth of converter cycle of building by laying bricks or stones because flat fire door body is planar structure, in the aspect of resistant material uses, the fire door brick no longer uses triangle magnesia carbon brick type and effectively reduces the fire door height to reduce resistant material use amount. Since the amount of the refractory used is reduced, the refractory cost is reduced and the converter masonry period is shortened.

Drawings

Fig. 1 is a front view of the present invention;

fig. 2 is a top view of the present invention;

FIG. 3 is a front view of a common magnesia carbon brick at a furnace mouth;

in the figure, 1 is an open hearth body, 11 is a converter hearth guard plate, 2 is a bolt, 3 is a converter hearth shell flange, 4 is a refractory material, and 5 is a converter body shell.

Detailed Description

The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention based on the embodiments of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided", "sleeved/connected", "connected", and the like are to be understood in a broad sense, such as "connected", which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in the figures 1-2, the utility model provides an open hearth for shortening the masonry cycle of a converter, which comprises an open hearth body 1 arranged above a converter body shell 5;

the flat furnace mouth body 1 comprises a plane structure which is formed by enclosing 4 converter mouth guard plates 11;

the converter mouth guard plate 11 is connected with a converter mouth furnace shell flange 3 arranged above the converter body furnace shell 5, and the converter mouth guard plate 11 is positioned above the converter mouth furnace shell flange 3;

and a refractory material 4 consisting of common magnesia carbon bricks and magnesia at a furnace mouth is filled in the furnace shell 5 of the converter body.

The utility model provides an above-mentioned flat fire door that shortens converter masonry cycle, wherein, the ordinary magnesia carbon brick of fire door is shown as figure 3, and its appearance is trapezoidal.

In the utility model, the converter mouth guard plate 11 is connected with the converter mouth furnace shell flange 3 through the bolt 2.

In the present invention, the number of the bolts 2 is 40.

In the utility model, the furnace shell flange 3 at the converter mouth is welded with the furnace shell 5 of the converter body.

In the utility model, the converter mouth guard plate 11 is a plane cast steel plate.

The utility model provides an above-mentioned flat fire door that shortens converter masonry cycle encloses jointly through 4 converter fire door backplate 11 and closes the flat fire door body that forms planar structure, wherein every converter fire door backplate is with 10 each bolt fastenings, 40 bolts altogether, uses refractory material 4 to fill in the converter body stove outer covering 5, refractory material 4 comprises magnesia carbon brick and magnesia, constitutes the main framework with magnesia carbon brick, adopts the magnesia to fill with the gap between converter fire door backplate 11, forms complete converter fire door;

because flat fire door body is planar structure, in the aspect of resistant material use, fire door brick no longer uses triangle magnesia carbon brick type and effectively reduces the fire door height to reduce 4 use amounts of resistant material. Since the amount of the refractory 4 used is reduced, the cost of the refractory 4 is reduced and the converter masonry cycle is shortened.

Before implementation: before the implementation, a converter mouth guard plate of a cambered cast steel plate is adopted, and the inner side of the converter mouth guard plate is provided with more than 450 triangular magnesia carbon bricks. Each brick is about 40 kg, the total weight is 18 tons, the month brick of the furnace mouth is 8000 yuan/ton, and the total amount is 14.4 ten thousand yuan. The amount of the magnesium sand used by the arc surface furnace mouth and the plane furnace mouth is basically consistent with the price of the cast steel plate.

After the implementation: after the implementation, a converter mouth guard plate 11 with a plane structure is formed by enclosing a plane cast steel plate,

the height of the furnace mouth is reduced, and 3 layers of furnace mouth triangular magnesia carbon bricks are reduced.

And (3) benefit measurement: the implementation of the patent can save the cost: 14.4 ten thousand yuan/campaign period. The masonry period of the converter is shortened, the operation rate of the converter is improved, and partial invisible benefits can be generated.

The above-mentioned embodiments are only intended to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and those skilled in the art should also be able to make various modifications and improvements to the technical solution of the present invention without departing from the spirit of the present invention, and all such modifications and improvements are intended to fall within the scope of the present invention as defined in the appended claims.

Claims

1. An open hearth for shortening the masonry cycle of a converter is characterized by comprising an open hearth body arranged above a converter shell of a converter body;

2. The open hearth according to claim 1, wherein the converter mouth guard plate is connected to the converter mouth shell flange by bolts.

3. The open hearth according to claim 2, wherein the number of said bolts is 40.

4. The open hearth according to claim 1, wherein the flange of the shell of the converter mouth is welded to the shell of the converter body.

5. The open hearth according to any one of claims 1 to 4, wherein said converter hearth protecting plate is a flat cast steel plate.