CN210886088U

CN210886088U - Slag skimmer for iron runner

Info

Publication number: CN210886088U
Application number: CN201921785504.3U
Authority: CN
Inventors: 姚华柏; 马晓明
Original assignee: Anshan City Liangzi Refractories Group Co ltd
Current assignee: Anshan City Liangzi Refractories Group Co ltd
Priority date: 2019-10-23
Filing date: 2019-10-23
Publication date: 2020-06-30
Anticipated expiration: 2029-10-23

Abstract

The utility model relates to a tapping runner skimmer, including main iron runner, skimmer body, passageway, molten iron small well, the skimmer body is established after the main iron runner, before the molten iron small well, and the passageway between the lower extreme of skimmer body and the ditch bottom is the passageway, its characterized in that, the skimmer body form by two refractory material prefabricates and the pouring of refractory material. The utility model has the advantages that: because increase two prefabricated sections in the skimmer, and evenly be equipped with the recess at the surface of two prefabricated sections, not only effectively improved whole skimmer intensity in addition, but also make the prefabricated section combine better with the castable, the skimmer lower part designs into the circular arc transition, in the little well of the more smooth entering of molten iron when making the separation of slag and iron.

Description

Slag skimmer for iron runner

Technical Field

The utility model belongs to the technical field of a tapping runner skimmer, in particular to a tapping runner skimmer.

Background

Blast furnace production is carried out continuously. The blast furnace is a generation from blow-in to overhaul blow-out, and the generation can continuously produce for several years to ten years. The main iron runner of the blast furnace is an important facility in front of the blast furnace, and the main iron runner of the blast furnace has the function of realizing the separation of liquid slag and iron. The slag skimmer is an essential part for the operation of the blast furnace in front of the blast furnace and is an important link for separating slag and iron during tapping. The skimmer is a container for separating iron slag during tapping of a blast furnace, and is subjected to ablation and washing of high-temperature iron slag. The normal skimmer is an indispensable part for the operation of the blast furnace in front of the blast furnace and is a place for separating slag and iron during tapping. The iron runner is mainly composed of a main iron runner, a skimmer, a passageway, a small well, a branch iron runner and the like. The skimmer is connected with a main iron runner, a branch iron runner and a side slag runner, and is positioned at an important position on a cast house. The structural requirements of the skimmer are as follows: 1. the passageway must ensure that the flow is not blocked when the large flow runs at the taphole, so the proper passageway size should be determined according to the size of the furnace volume and the number of tapping times. 2. The bottom of the sand dam is higher than the bottom of the sand gate by 100-150 mm. 3. The bottom of the sand gate and the bottom of the gully head (small well molten iron outlet) are kept on the same horizontal plane. The requirements on the material and the structure of the skimmer are very strict, most of the skimmers are cast at present, and some refractory manufacturers also adopt the combination of casting materials and precast blocks for casting. The skimmer has the following defects: 1. the slag skimmer has too long baking time, which affects tapping time and causes the whole process flow of the iron works to be interrupted. 2. The slag skimmer has short baking time, and the casting material contains undried water, so that the phenomenon of material collapse exists during tapping. So that the molten iron is diverted and lost for iron works.

The molten slag and the molten iron from the taphole float on the molten iron due to the different densities thereof. After the skimmer is filled with molten iron, the molten iron can pass through the small well and the main iron runner due to the communication of the small well and the main iron runner. The slag is blocked by the skimmer and can not flow into the small well, so that the slag-iron shunting work is completed.

Disclosure of Invention

The utility model aims at providing a casting runner skimmer which can enhance the overall strength of the skimmer and reduce the baking time of the skimmer.

The purpose of the utility model is realized just like this.

The utility model discloses a tapping runner skimmer, including main iron runner, skimmer body, passageway, molten iron small well and a indisputable runner, the skimmer body is established after the main iron runner, before the molten iron small well, and the passageway between the lower extreme of skimmer body and the ditch bottom is the passageway, its characterized in that, the skimmer body form by two refractory material prefabricates and the pouring of refractory material.

Preferably, the outer surfaces of the two prefabricated parts are uniformly provided with grooves, gaps between the prefabricated parts and the skimmer die are filled with refractory castable to form the skimmer, and the lower end of the outer side of the skimmer is in circular arc transition.

Preferably, the distance between the two preforms in the skimmer body is 200 mm-300 mm.

During manufacturing, the two prefabricated parts made of the refractory materials are baked in advance at the baking temperature of 200-200 ℃, and then the prefabricated parts are fixed on the passageway die, and gaps between the two prefabricated parts and a main channel die are filled with the refractory castable. After the main ditch is poured, curing, demolding and baking. Baking with small fire, and gradually turning to baking with big fire.

Compared with the prior art, the utility model has the advantages that:

because increase two prefabricated sections in the skimmer, and evenly be equipped with the recess at the surface of two prefabricated sections, not only effectively improved whole skimmer intensity in addition, but also make the prefabricated section better combine with the castable, the skimmer lower part designs into the circular arc transition, in the little well of the more smooth entering of molten iron when causing the separation of slag and iron, has increased the life of skimmer by a wide margin.

In addition, because the precast blocks are baked in advance and the precast blocks are designed in shape, the baking time of the skimmer is reduced, the influence on the strength, the scouring resistance and the erosion resistance of the skimmer due to the improper baking is avoided, the frequency of the traditional periodic overhaul of the skimmer is greatly reduced, the consumption of refractory materials can be reduced, and the labor intensity and the production cost of workers are reduced.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1, the utility model discloses a tapping runner skimmer, including main iron runner 1, skimmer body 5, passageway 8, molten iron small well 7 and a branch iron runner 6, skimmer body 5 is established behind main iron runner 1, before molten iron small well 7, and the passageway between the lower extreme of skimmer body 5 and the ditch bottom 9 is passageway 8, its characterized in that, skimmer body 5 form by two refractory material prefabricates 3 and 4 and the pouring of refractory material 2.

In order to make the prefabricated section combine better with the pouring material, the utility model discloses the surface of two prefabs evenly be equipped with the recess, make the skimmer after the gap between prefab and the skimmer mould is filled with refractory castable, and skimmer outside lower extreme is the circular arc transition. So that molten iron can more smoothly enter the small well during slag-iron separation.

The distance between the two prefabricated parts in the skimmer body is 200 mm-300 mm. Due to the fact that the precast block is baked in advance and the shape of the precast block is achieved, baking time of the skimmer is shortened, and meanwhile the fact that strength, scouring resistance and erosion resistance of the skimmer are affected due to the fact that baking is not in place is avoided.

Claims

1. The utility model provides a tap hole skimmer, includes main iron runner, skimmer body, passageway, molten iron small well and a branch iron runner, and the skimmer body is established behind the main iron runner, before the molten iron small well, and the passageway between the lower extreme of skimmer body and the ditch bottom is the passageway, its characterized in that, the skimmer body form by two refractory material prefabricates and the pouring of refractory material.

2. The tapping runner skimmer of claim 1, wherein grooves are uniformly formed in the outer surfaces of the two prefabricated members, a gap between the prefabricated members and the skimmer die is filled with a refractory castable to form the skimmer, and the lower end of the outer side of the skimmer is in arc transition.

3. A runner skimmer as claimed in claim 2, wherein said runner skimmer is adapted to remove slag from the runner

The distance between the two prefabricated parts in the skimmer body is 200 mm-300 mm.