CN219174527U

CN219174527U - Swinging launder for blast furnace ironmaking

Info

Publication number: CN219174527U
Application number: CN202223437239.4U
Authority: CN
Inventors: 刘云飞; 高冲锋; 张扬; 李纪伟; 谢国锋; 郭忠航
Original assignee: Luoyang Sheng Iron Refractories Co ltd
Current assignee: Luoyang Sheng Iron Refractories Co ltd
Priority date: 2022-12-22
Filing date: 2022-12-22
Publication date: 2023-06-13
Anticipated expiration: 2032-12-22

Abstract

The utility model discloses a swinging launder for blast furnace ironmaking, which comprises a steel shell, wherein a groove is formed in the middle of the steel shell, clay slurry with the thickness smaller than that of a steel shell is filled in the groove, a permanent lining is formed by casting a lightweight high-strength casting material on the upper part of the steel shell, a weak bonding layer is formed by paving corundum aggregate or dry material with the granularity of 10-20 meshes twice on the upper part of the permanent lining, and a working lining is cast on the upper part of the weak bonding layer; the weak bonding layer plays a role in buffering, the service lives of the working lining and the permanent lining are prolonged, the working lining is easy and convenient to disassemble after being damaged, the permanent lining is not easy to damage, the utilization rate of refractory materials is improved, and the production cost is saved.

Description

Swinging launder for blast furnace ironmaking

Technical Field

The utility model belongs to the technical field of blast furnace iron smelting, and particularly relates to a swinging launder for blast furnace iron making.

Background

In the blast furnace ironmaking process, the smelted molten iron is collected, and two forms are generally adopted, one is in a fixed molten iron runner form, the other is in a movable molten iron runner form, wherein one of main equipment in the movable molten iron runner form is a swinging launder, and the main functions of the swinging launder are to receive and transfer the molten iron. After tapping of the blast furnace, high-temperature molten iron flows to the swing launder through the iron runner, is transported to the ladle or the torpedo tank through the swing launder, and as the fall between the iron hook and the swing launder is very large, the impact force of the high-temperature molten iron is very strong, especially in a molten iron impact area, vertical seams are easily formed due to the impact of the high-temperature molten iron, so that the service life of the swing launder is shortened, when maintaining, slag-hanging residual iron is more, the slag-hanging residual iron is difficult to clean and can only be cleaned in a large area, the waste of refractory materials is caused, the existing swing launder has severe service conditions, and the swing launder capable of reducing the loss of the refractory materials and having long service life is needed to solve the problems.

Disclosure of Invention

The utility model aims to solve the technical problems and provides the swinging launder for blast furnace ironmaking, which has the advantages of simple structural design and convenient operation, and can prolong the service life of the swinging launder and reduce material loss.

The technical scheme adopted by the utility model is as follows: the swinging launder for blast furnace ironmaking includes steel casing, permanent lining in the upper part of the steel casing, weak binding layer in the upper part of the permanent lining and working lining in the upper part of the weak binding layer.

The middle of the steel shell is a plane, two sides of the steel shell incline towards the middle, a groove is formed in the middle of the whole steel shell, and clay slurry with the thickness smaller than that of the steel shell is filled in the groove.

The cross sections of the steel shell, the permanent liner, the weak bonding layer and the working liner are all trapezoidal.

The permanent lining is formed by casting light-weight high-strength casting materials.

The weak bonding layer is formed by pouring corundum aggregate or dry material, has granularity of 10-20 meshes, and has paving thickness of 80-100mm, and is paved twice.

The working lining is cast from a normal launder casting, which is a conventional arrangement in the prior art and will not be described in detail here.

When the swing launder for blast furnace ironmaking is used, firstly, clay slurry is filled in a groove in the middle part of a steel shell, a permanent lining is poured on the upper part of the steel shell by using a lightweight high-strength castable, corundum aggregate or dry material with the granularity of 10-20 meshes is paved on the upper part of the permanent lining twice, a weak bonding layer with the thickness of 80-100mm is formed, and a working lining is poured on the upper part of the weak bonding layer by using a normal launder castable, and the working lining is put into use after the manufacturing is finished.

The weak bonding layer adopts corundum aggregate or dry material with granularity of 10-20 meshes, so that a certain buffer effect can be achieved when molten iron is poured into the swing launder, the impact strength of the molten iron to the working lining is reduced, the service life of the working lining is further prolonged, when the working lining is damaged, the working lining is easy to detach due to the existence of the weak bonding layer, the new working lining is replaced, the permanent lining is continuously used, the loss of refractory materials is reduced, and the production cost is reduced.

The middle part of the steel shell is provided with a groove and filled with clay mud with the thickness smaller than the total thickness of the steel shell, and the effect is that: the swinging plate is fixedly connected with the middle of the swinging chute support frame, so that the swinging chute can be embedded into a groove in the middle of the bottom of the swinging chute with the swinging plate in the middle of the support frame, and the stability of the swinging chute in the use process is kept.

The weak bonding layer is cast twice, so that the overall stability of the material can be improved.

The beneficial effects of the utility model are as follows:

the utility model has simple design structure and convenient operation, combines the steel shell, the permanent lining, the weak bonding layer and the working lining, and has the advantages that the weak bonding layer can play a role in buffering, the working lining and the permanent lining are protected, the loss of the working lining and the permanent lining due to molten iron impact is reduced, the service lives of the working lining and the permanent lining are prolonged, the working lining is easy to detach from the weak bonding layer for replacement when being damaged, the lower permanent lining is not easy to damage, the loss of refractory materials is reduced, and the production cost is reduced.

Drawings

FIG. 1 is a schematic left-hand view of the present utility model;

FIG. 2 is a schematic top view of the present utility model;

fig. 3 is a schematic front view of the present utility model.

The marks in the figure: 1. a steel housing; 2. a permanent liner; 3. a weak bond layer; 4. a working liner; 5. a groove.

Detailed Description

The following describes the embodiments of the present utility model in further detail with reference to the drawings.

As shown in the figure, the swinging launder for blast furnace ironmaking comprises a steel shell 1, wherein a groove 5 is formed in the middle of the steel shell 1, a permanent lining 2 is cast on the upper part of the steel shell 1, a weak bonding layer 3 is laid on the upper part of the permanent lining 2, and a working lining 4 is cast on the upper part of the weak bonding layer 3.

The steel shell 1 is flat in the middle, two sides of the steel shell incline towards the middle, and the cross sections of the steel shell 1, the permanent liner 2, the weak bonding layer 3 and the working liner 4 are trapezoidal.

The permanent lining 2 is formed by casting lightweight high-strength casting materials, so that the self weight of the swing launder prefabricated member can be reduced while the high strength of the permanent lining is ensured.

The weakly bonded layer 3 corundum aggregate or the dry material is formed by casting, the granularity is 10-20 meshes, the paving thickness is 80-100mm, and the paving is carried out twice.

And clay slurry with the thickness smaller than that of the steel shell 1 is poured into the grooves 5.

When the swinging launder for blast furnace ironmaking is used, firstly, clay slurry is poured into the groove 5, light-weight high-strength castable is poured on the upper part of the steel shell 1 to form the permanent lining 2, corundum aggregate with the granularity of 10-20 meshes is paved on the upper part of the permanent lining 2 twice, the thickness is finally paved to be 90mm, the weak bonding layer 3 is formed, normal launder castable is poured above the weak bonding layer 3 to form the working lining 4, the working lining 4 is put into use after manufacturing, when the working lining 4 is impacted by molten iron, the weak bonding layer 3 plays a buffering role, the service lives of the working lining 4 and the permanent lining 2 are prolonged, after the working lining 4 is damaged, the working lining 4 can be independently removed and replaced, the permanent lining 2 and the weak bonding layer 3 are continuously used, the loss of refractory materials is reduced, and the production cost is reduced.

Claims

1. A swing launder for blast furnace ironmaking is characterized in that: the steel shell comprises a steel shell, wherein a permanent lining is cast on the upper part of the steel shell, a weak bonding layer is paved on the upper part of the permanent lining twice by corundum aggregate or dry material with the granularity of 10-20 meshes, the thickness of the weak bonding layer is 80-100mm, and a working lining is cast on the upper part of the weak bonding layer.

2. The swinging launder for blast furnace ironmaking according to claim 1, characterized in that: the permanent lining is formed by pouring lightweight high-strength castable, a groove is formed in the middle of the steel shell, and clay slurry with the thickness smaller than that of the steel shell is filled in the groove.

3. The swinging launder for blast furnace ironmaking according to claim 1, characterized in that: the middle of the steel shell is a plane, two sides of the steel shell incline towards the middle, and the cross sections of the steel shell, the permanent liner, the weak bonding layer and the working liner are trapezoidal.