CN220393784U

CN220393784U - Prefabricated block for impact area of main iron runner of blast furnace

Info

Publication number: CN220393784U
Application number: CN202321723943.8U
Authority: CN
Inventors: 李新健; 朱子江; 黄锋; 金从进; 李�杰; 杨政宏
Original assignee: Jiangsu Jiaht Materials Co ltd
Current assignee: Jiangsu Jiaht Materials Co ltd
Priority date: 2023-07-04
Filing date: 2023-07-04
Publication date: 2024-01-26
Anticipated expiration: 2033-07-04

Abstract

The utility model relates to the technical field of blast furnace ironmaking, in particular to a precast block for a main iron runner impact zone of a blast furnace, which comprises a precast block body with a cuboid structure, wherein grooves are vertically formed at the edges of two ends of the precast block body in the length direction, a cuboid boss is arranged at the bottom of one side of the precast block body in the width direction, the boss and the precast block body are integrally formed, the longitudinal sections of the boss and the precast block body are inverted L-shaped, and the bottom suspension area of the precast block body is communicated with the grooves.

Description

Prefabricated block for impact area of main iron runner of blast furnace

Technical Field

The utility model relates to the technical field of blast furnace ironmaking, in particular to a precast block for a main iron runner impact zone of a blast furnace.

Background

At present, in the operation mode of high wind temperature and high wind pressure, the tapping temperature of the blast furnace is greatly increased and is increased to be higher than 1520 ℃, and the flow rate of molten iron is also increased. Along with the continuous improvement of molten iron temperature and smelting intensity, the refractory material for a blast furnace cast house comprises the refractory material for a main runner impact area, the main runner impact area is flushed by molten iron and slag at high temperature and is also mechanically worn and chemically eroded, and meanwhile, the refractory material in the area is damaged quickly due to comprehensive effects such as rapid change of temperature gradient, the situation that the service lives of the main runner impact area and a advection area are not synchronous often occurs, and even the situation that the residual thickness of the impact area is too thin and the continuous line is taken off in advance in the later use period seriously affects the normal operation of the blast furnace.

At present, most blast furnace main iron runner middle repair mainly adopts a hot repair mode, the repair mode is to put residual iron first, then use a digging machine to clean damaged parts, then cast by a lower die, and demould and bake after casting is completed, and the whole process takes about 12-24 hours. Because repair time is short, the temperature of the residual lining of the main iron runner is higher (more than 500 ℃), the water adding amount of the main runner castable needs to be increased much than that of the main runner castable under normal conditions, and the internal moisture of the castable can be volatilized rapidly after the stirred main runner castable is poured into the main iron runner, and the structure is loose due to the rapid volatilization of the moisture, so that the compactness and the physical performance of the main iron runner are greatly reduced, and because the impact area is more severe than the use environment of the advection area, the service life of the impact area is lower than that of the advection area, and the service life is not matched, if the impact area is too thin, the excessive waste of the advection area refractory material can be caused by the fact that the impact area is taken off in advance. Therefore, research and development of a precast block for the impact zone of the main iron runner of the blast furnace are needed, so that the physical properties of materials can be effectively enhanced, the baking time is shortened, the service life of the impact zone of the main iron runner of the blast furnace is greatly prolonged, and the matching of the service lives of the impact zone and the advection zone is realized.

Disclosure of Invention

In order to solve the technical problems, the utility model provides the precast block for the impact area of the main iron runner of the blast furnace, which is directly replaced and used after the impact area of the main iron runner is damaged, solves the problems that the normal production of the blast furnace is affected by loose structure, low service life and the like of the main iron runner during on-site casting of the impact area of the main iron runner in the prior art, can prolong the path of iron infiltration by utilizing the design of the grooves and the bosses, and reduces the phenomena of iron infiltration and iron leakage at the joint of the precast block and castable in the use process.

The blast furnace main iron runner impact zone prefabricated section in this scheme, including the prefabricated section body of cuboid column structure, the both ends edge of prefabricated section body length direction is all vertical to be seted up flutedly, one side bottom of prefabricated section body width direction is provided with the boss of cuboid column shape, boss and prefabricated section body integrated into one piece and both longitudinal sections are the type of falling L, the unsettled region in bottom of this prefabricated section body with the recess intercommunication, when using, the pouring material can be poured into the unsettled region in bottom (i.e. the side of boss) that the recess got into prefabricated section body into, from this can increase the inboard molten iron infiltration route to the outside of main runner, effectively reduce the condition of oozing iron.

The technical scheme of the utility model is as follows:

further, the precast block body is provided with a lifting lug.

Further, two lifting lugs are arranged and symmetrically arranged on the precast block body.

Further, the prefabricated block body has a size of 1500×300×500mm.

Further, the size of the boss is 1500×110×150mm.

Further, the cross section of the groove is square.

The beneficial effects of the utility model are as follows:

1. according to the utility model, through the design of the precast block grooves and the bosses, the molten iron infiltration path from the inner side to the outer side of the main channel can be increased, and the conditions of iron infiltration and iron leakage at the joint of the precast block and the castable can be reduced;

2. the water adding amount and vibration can be accurately controlled when the precast block is formed, so that the compactness of the precast block is ensured;

3. the prefabricated block is fully maintained and baked, so that the excellent physical properties of the prefabricated block are ensured, and the prefabricated block is directly used without bursting;

4. the design of the precast block lifting lug not only can be used for transporting and lifting precast blocks, but also can be used for positioning and fixing the precast blocks when in use;

5. the precast block provided by the utility model effectively prolongs the service life of the impact area of the main iron runner of the blast furnace, realizes the matching of the service lives of the impact area and the advection area, and reduces the unit consumption of refractory materials.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a precast block in the impact zone of a main iron runner of a blast furnace;

FIG. 2 is a schematic diagram of the front structure of a precast block in the impact area of a main iron runner of the blast furnace;

FIG. 3 is a schematic side view of a precast block in the impact area of a main iron runner of the blast furnace;

FIG. 4 is a top view of a prefabricated block of the blast furnace main iron runner impact zone of the present utility model;

FIG. 5 is a schematic view of the blast furnace main iron runner impact zone precast block of the present utility model when applied to a main runner;

wherein: 1. a precast block body; 2. a groove; 3. a boss; 4. lifting lugs; 5. a main trench; 6. and (5) casting materials.

Detailed Description

As shown in fig. 1-4, the precast block for the blast furnace main iron runner impact zone provided by the embodiment comprises a cuboid precast block body 1, wherein the size of the precast block body is 1500×300×500mm, grooves 2 are vertically formed in two side edges of the precast block body 1 in the length direction, the cross section of each groove 2 is 80×80mm, a cuboid boss 3 is arranged on one side of the bottom surface of the precast block body 1, the size of each boss 3 is 1500×110×150mm, and two lifting lugs 4 are symmetrically arranged on the top surface of the precast block body 1.

The prefabricated block of the blast furnace main iron runner impact area in the embodiment is prefabricated firstly, the prefabricated block body 1, the groove 2 and the boss 3 are uniformly and integrally formed, baking is carried out after demoulding and curing, the baking temperature is higher than 360 ℃, free water and combined water in the prefabricated block can be guaranteed to be fully discharged, and burst is avoided when the prefabricated block is put into use.

As shown in fig. 5, after the impact area precast block is matched with the main ditch to reach the service life, after the old skimming tool precast block is broken by using a hook machine during repairing in the main ditch, peripheral scraps are cleaned, then a new main ditch impact area precast block body 1 is hung in by using lifting lugs 4 and is arranged on two sides of the main ditch 5, the main ditch castable 6 is poured into the periphery of the impact area precast block to be used, the castable 6 can be poured into the grooves 2 and the bottoms (namely, beside the boss 3) of the precast block body 1, and the design of the grooves 2 and the boss 3 is utilized to enlarge the infiltration path of molten iron and reduce the iron infiltration condition.

In addition to the above embodiments, the present utility model may have other embodiments; all technical schemes formed by equivalent substitution or equivalent transformation fall within the protection scope of the utility model.

Claims

1. The utility model provides a blast furnace main iron runner impact zone prefabricated section, its characterized in that includes the prefabricated section body of cuboid column structure, prefabricated section body length direction's both ends edge is all vertical to be seted up flutedly, one side bottom of prefabricated section body width direction is provided with cuboid column boss, boss and prefabricated section body integrated into one piece and both longitudinal section are the type of falling L, the unsettled region in bottom of this prefabricated section body with the recess intercommunication.

2. A prefabricated block according to claim 1, wherein the prefabricated block body is provided with lifting lugs.

3. A prefabricated block according to claim 2, wherein two lifting lugs are provided and symmetrically arranged on the prefabricated block body.

4. A prefabricated block according to claim 1, wherein the prefabricated block body has dimensions of 1500 x 300 x 500mm.

5. A prefabricated block according to claim 1 wherein the boss is 1500 x 110 x 150mm in size.

6. A prefabricated block according to claim 1 wherein the grooves are square in cross section.