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Adjusting device for air intake area of blast furnace air intake

A technology for adjusting the device and the air inlet area, applied in the direction of the tuyere, etc., can solve the problems that the blast furnace cannot adjust the air inlet area in a timely and accurate manner, the blast furnace tuyere cannot be opened in time, and the time to increase the air volume, etc., and achieves easy processing and operation. Reasonable design and the effect of restoring furnace conditions

Inactive Publication Date: 2015-01-28
SHANDONG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem in the prior art that the tuyere of the blast furnace bonded with refractory materials cannot be opened in time, which leads to the inability to timely and accurately adjust the air intake of the blast furnace when the blast furnace is opened, long-term wind shutdown and furnace conditions are not smooth. Area, the technical problem that affects the optimal blast furnace control and the time to increase the air volume, the present invention provides an adjusting device for the air inlet area of ​​the blast furnace air inlet, which can effectively adjust the air inlet area of ​​the blast furnace air inlet according to the needs, And the structure design is reasonable, the investment cost is low, easy to process and operate

Method used

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  • Adjusting device for air intake area of blast furnace air intake
  • Adjusting device for air intake area of blast furnace air intake

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Embodiment 1

[0020] During blast furnace production, the air supply area is determined according to the kinetic energy of the blast and the air volume of the air supply. When the blast furnace is turned on, the air supply volume is small, and the air inlet of the blast furnace is designed according to the area required for normal production. Therefore, part of the air inlet must be blocked to meet the blast kinetic energy requirements during production. In this embodiment, the blast furnace is designed with 36 air inlets, and the required air supply area is calculated according to the kinetic energy of the blast when the furnace is started to be 0.294m 2 At this time, 10 air inlets must be blocked. The diameter of the closed end of the adjustment device designed to be embedded in the air inlet is 80mm or 90mm. The thickness of the closed end and the side wall of the adjustment device are both 20mm. The length of the adjustment device is 350mm.

[0021] According to the calculation, the ai...

Embodiment 2

[0023] When the blast furnace is shut down for a long time to restore the furnace condition, the air volume is small at the initial stage of the furnace condition recovery. In order to ensure sufficient blast kinetic energy, it is necessary to block most of the tuyere. In this embodiment, the blast furnace is designed with 18 air inlets, and 14 air inlets need to be blocked when the furnace condition is restored. The diameter of the closed end of the regulating device embedded in the air inlet is designed to be 70 mm or 80 mm, and the closed end of the regulating device and the thickness of the side wall are 20mm, and the length of the adjusting device is 250mm.

[0024] According to the calculation, the air inlet area needs to be increased by 0.0038m 2 When opening the closed end of the adjustment device, it is necessary to further increase the air intake area by 0.0095m 2 , open the rest of the adjuster all the way.

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Abstract

The invention provides an adjusting device for the air intake area of a blast furnace air intake. The adjusting device (2) adopts a circular truncated cone-shaped cavity structure; one end of the adjusting device (2) is an adjusting device opening end (6); the adjusting device opening end (6) is arranged in the air intake of a small tuyere sleeve (1) in a sleeving manner; the small tuyere sleeve (1) is nested in the blast furnace air intake; the other end of the adjusting device (2) is an adjusting device closing end (3) and is used for closing the blast furnace air intake. According to the adjusting device for the air intake area of the blast furnace air intake, the blast furnace air intake can be effectively blocked by the arranged adjusting device opening end, the adjusting device opening end and the whole adjusting device can be opened one by one according to the need of air volume, the air intake area of the blast furnace can be adjusted timely and accurately, the furnace condition can be restored rapidly and efficiently, and the adjusting device has the advantages of reasonable structure design, low investment cost, and easiness in processing and operation.

Description

technical field [0001] The invention relates to the technical field of metallurgical equipment, in particular to an adjusting device for the air inlet area of ​​a blast furnace air inlet. Background technique [0002] When the blast furnace is shut down for a long time, the furnace condition is not smooth or the blast furnace is newly opened, the air intake must be gradually adjusted. In the process of ironmaking production, the technology of blocking part of the tuyere is adopted to reduce the air intake area and increase the blast kinetic energy, so as to meet the technical requirements required for blast furnace smelting. The materials used to block the tuyere are all refractory materials with good adhesion. With the increase of production intensity or the recovery of furnace conditions, the air intake volume must be gradually increased. The increase of blast furnace air volume must match the air intake area, and the air intake area will change with the change of air int...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B7/16
CPCC21B7/16
Inventor 蒋学健王燕王连昌林晓辉
Owner SHANDONG IRON & STEEL CO LTD