CN209890657U

CN209890657U - Blast furnace air inlet blowpipe

Info

Publication number: CN209890657U
Application number: CN201920327193.XU
Authority: CN
Inventors: 方明宇; 陈现华; 张立鸽
Original assignee: Luohe Xinshitong Metallurgical Equipment Co Ltd
Current assignee: Luohe Xinshitong Metallurgical Equipment Co Ltd
Priority date: 2019-03-15
Filing date: 2019-03-15
Publication date: 2020-01-03
Anticipated expiration: 2029-03-15

Abstract

The utility model provides an air inlet blowpipe of a blast furnace, which comprises a pipe wall, a lining material, a hot air pipe cavity and a pulverized coal spray pipe; the inner lining material is cast and molded in the pipe wall to cover the inner wall of the whole blowing pipe and form a hot air pipe cavity; the pipeline of the pulverized coal spray pipe is communicated with the hot air pipe cavity; the wall of the hot air pipe cavity formed by the lining material is provided with a thread groove. The blast furnace air inlet blowpipe enables pulverized coal sprayed by a coal injection gun to be diffused and fully combusted, and the washout of the tuyere small sleeve by the pulverized coal is reduced.

Description

Blast furnace air inlet blowpipe

Technical Field

The utility model relates to a blast furnace air inlet blowpipe belongs to blast furnace ironmaking equipment field.

Background

In the blast furnace ironmaking process, high-temperature hot air generated in a hot blast furnace needs to be sent to the blast furnace, a blast furnace air inlet device is a specially arranged air inlet channel device, and a belly pipe belongs to a part of the air inlet device. At present, in domestic air supply devices, lining channels of straight-through blowing pipes are straight-through, so that the coal dust is not beneficial to fully diffusing, and the coal dust seriously erodes small air port sleeves.

Disclosure of Invention

The utility model provides a blast furnace air inlet blowpipe which can diffuse the coal powder sprayed by a coal injection gun, fully burn and reduce the coal powder to erode the tuyere small sleeve.

The utility model relates to an air inlet blowpipe of a blast furnace, which comprises a pipe wall, a lining material, a hot air pipe cavity and a pulverized coal spray pipe; the inner lining material is cast and molded in the pipe wall to cover the inner wall of the whole blowing pipe and form a hot air pipe cavity; the pipeline of the pulverized coal spray pipe is communicated with the hot air pipe cavity; the wall of the hot air pipe cavity formed by the lining material is provided with a thread groove.

The inner diameter of the hot air pipe cavity is gradually reduced or reduced step by step in the wind flow direction, and the inner diameter of the same step is the same.

The thread groove of the hot blast pipe cavity wall is a multi-thread.

The thread groove of the hot air pipe cavity wall is cut at the outlet of the pulverized coal spray pipe.

Blast furnace air inlet blowpipe is at the air supply in-process, and in the blast furnace was sent into to hot-blast rotation type, it was rotatory, the diffusion to drive the buggy, and the burning is abundant, under equal smelting condition, reduces coal injection volume 1% -4%, practices thrift and smelts the cost, and the buggy distributes the diffusion, and rotatory hot-blast reduction erodees tuyere small sleeve part, extension small sleeve life.

Drawings

Fig. 1 is a diagram illustrating the results of the embodiment of the present invention.

Detailed Description

The following embodiments of the present invention will be further explained with reference to the accompanying drawings:

as shown in fig. 1, the blast furnace air intake blowpipe of the present invention comprises a pipe wall 4, a lining material 3, a hot air pipe cavity 1, and a pulverized coal nozzle 2; the lining material 3 is cast and molded in the tube wall to cover the inner wall of the whole blowing tube and form a hot air tube cavity 1; the pipeline of the pulverized coal spray pipe 2 is communicated with the hot air pipe cavity 1; the wall of the hot air pipe cavity 1 formed by the lining material 3 is provided with a three-thread groove.

The inner diameter of the hot air pipe cavity 1 is gradually reduced in the wind flow direction, and the inner diameter of the same step is the same.

The thread groove on the wall of the hot air pipe cavity 1 is cut at the outlet of the pulverized coal spray pipe 2.

Claims

1. An air inlet blowpipe of a blast furnace comprises a pipe wall, a lining material, a hot air pipe cavity and a coal powder spray pipe; the inner lining material is cast and molded in the pipe wall to cover the inner wall of the whole blowing pipe and form a hot air pipe cavity; the pipeline of the pulverized coal spray pipe is communicated with the hot air pipe cavity; the hot air pipe cavity is characterized in that the wall of the hot air pipe cavity formed by lining materials is provided with a thread groove, the inner diameter of the hot air pipe cavity is gradually reduced or gradually reduced in the direction of wind flow, and the inner diameters of the same step are the same.

2. The blast furnace air intake lance tube as set forth in claim 1, wherein the thread groove in the wall of the hot blast furnace chamber is a multi-start thread.

3. The blast furnace air intake blowpipe of claim 1, wherein the threaded groove in the wall of the hot blast pipe terminates at the exit of the pulverized coal injection lance.