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Hole opening method for flange hole plate of blast furnace shell tuyere

A furnace shell tuyere, tuyere flange technology, applied in the tuyere and other directions, can solve the problems of difficult control of deformation, large shell thickness, large hole diameter, etc., to reduce the area of ​​the hole, ensure the rolling quality, and meet the tolerance Effects of Requirement Range Requirements

Active Publication Date: 2018-02-13
ANGANG CONSTR CONSORTIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large thickness of the shell and the large diameter of the opening, it is difficult to control the deformation during cutting and rolling

Method used

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  • Hole opening method for flange hole plate of blast furnace shell tuyere
  • Hole opening method for flange hole plate of blast furnace shell tuyere

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Such as Figure 1-2 , Anshan Iron and Steel No. 1 blast furnace shell, in which the fifth cone belt is the tuyere belt, the shell thickness is 80mm, the diameter of the large mouth is 14880mm, and the diameter of the small mouth is 14280mm. It is made of 10 tiles. There are 30 tuyeres in this belt. 3 air outlet flange holes, the radius R of the air outlet flange hole is 640mm.

[0027] The method of opening the flange hole plate of the blast furnace shell tuyere, the steps are as follows:

[0028] 1. The steel plate is cut into several fan-shaped tiles, and the flange hole line of the tuyere is marked at the position corresponding to the tuyere of the blast furnace;

[0029] 2. Place the cut furnace shell tile 1 on the platform of the CNC cutting machine for hole cutting, so that there is a connecting belt 3 in the middle of the cut flange hole 2 of the tuyere, and the cutting sequence of the flange hole of each tuyere is:

[0030] 1) The arc length AB=550mm is symmet...

Embodiment 2

[0042] Anshan Iron and Steel No. 9 blast furnace shell is made, the fifth cone belt is the tuyere belt, the shell thickness is 65mm, the diameter of the large mouth is 12900mm, and the diameter of the small mouth is 12100mm. It is made of 7 tiles. There are 28 tuyeres in this belt. There are two air outlet flange holes, and the radius R of the air outlet flange hole is 540mm.

[0043] The method of opening the flange hole plate of the blast furnace shell tuyere, the steps are as follows:

[0044] 1. The steel plate is cut into several fan-shaped tiles, and the flange hole line of the tuyere is marked at the position corresponding to the tuyere of the blast furnace;

[0045] 2. Place the cut furnace shell tile 1 on the platform of the CNC cutting machine for hole cutting, so that there is a connecting belt 3 in the middle of the cut flange hole 2 of the tuyere, and the cutting sequence of the flange hole of each tuyere is:

[0046] 1) Cut the arc length AB=500mm symmetrically ...

Embodiment 3

[0058] Anshan Iron and Steel No. 7 Blast Furnace shell is made, the fifth cone belt is the tuyeres belt, the shell thickness is 55mm, the diameter of the big mouth is 10800mm, and the diameter of the small mouth is 10100mm, and it is made of 6 tiles. A tuyere flange hole, the radius R of the tuyere flange hole is 510mm.

[0059] The method of opening the flange hole plate of the blast furnace shell tuyere, the steps are as follows:

[0060] 1. The steel plate is cut into several fan-shaped tiles, and the flange hole line of the tuyere is marked at the position corresponding to the tuyere of the blast furnace;

[0061] 2. Place the cut furnace shell tile 1 on the platform of the CNC cutting machine for hole cutting, so that there is a connecting belt 3 in the middle of the cut flange hole 2 of the tuyere, and the cutting sequence of the flange hole of each tuyere is:

[0062] 1) The arc length AB=450mm is symmetrically cut at the vertical center line of the hole at 0°;

[006...

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Abstract

The invention relates to a method punching air opening flange holes of a blast furnace shell in a flat plate. The method punching air opening flange holes of the blast furnace shell in the flat plate comprises the following steps: 1, cutting a steel plate into a plurality of fan-shaped tiles, and marking air opening flange hole cutting lines in corresponding blast furnace air opening positions; 2, placing cut furnace shell tiles on a numerical control cutting machine platform, cutting holes, reserving connecting bands between the cut air opening flange holes, and cutting each air opening flange hole in a manner shown in step 3; 3, after cutting the hole in each furnace shell tile, bending the furnace shell tile into an arc shape on a roll bending machine; and 4, after bending the furnace shell, cutting off the connecting bands along the air opening flange hole cutting lines by a gas welding gun for handwork. The cutting order is reasonably arranged, and the deformation of the air opening flange holes is controlled during cutting. As the connecting bands are reserved when the air opening flange holes are cut, the punching area is reduced, bending deformation is controlled, furnace shell bending quality is ensured, and the tolerances of the air opening flange holes are within a required range.

Description

technical field [0001] The invention relates to the field of blast furnace manufacturing, in particular to a method for opening a flat plate with a flange hole in a tuyere of a blast furnace shell. Background technique [0002] The traditional blast furnace shell tuyere flange hole is installed on the construction site with a model number hole, and then manually gas-cut the hole. The technology is backward, the construction period is long, and the quality is poor. [0003] Our company uses the computer to arrange the holes on the tuyere flange holes on the blast furnace shell in the factory, and the flat CNC cutting machine to cut the holes. The opening speed is fast and the quality is high. However, due to the large thickness of the shell and the large diameter of the opening, it is difficult to control the deformation during cutting and rolling. Therefore, a method is needed to complete the deformation control of the furnace shell tuyere flange hole plate opening cutting ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00C21B7/16
CPCB23P15/00C21B7/16
Inventor 马丽
Owner ANGANG CONSTR CONSORTIUM