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Method for determining and verifying length of tuyere of blast furnace

A method and technology for determining the tuyere, which is applied in the field of determining and verifying the length of the tuyere of a blast furnace, and can solve the problems of affecting the edge airflow, lack of scientific basis and technical solutions, and no scientific and reasonable method to determine the length of the tuyere.

Pending Publication Date: 2022-05-10
HANDAN IRON & STEEL GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no comprehensive and systematic information about the length of the tuyere through which parameters affect the edge airflow, the degree of influence, whether there is a quantitative relationship between them, and whether there is a scientific and reasonable method to determine the length of the tuyere.
In fact, at present, the adjustment of the length of most blast furnace tuyeres mainly adopts the empirical method of comparative analogy, which lacks scientific basis and technical solutions.

Method used

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  • Method for determining and verifying length of tuyere of blast furnace
  • Method for determining and verifying length of tuyere of blast furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] Such as figure 1 , 2 As shown, the effective volume is 2000m 3 Blast furnace, known furnace type parameters, furnace waist diameter, D, 11750mm. Bosh height, h2, 3050mm. Hearth diameter, d, 10500mm. Hearth height, h1, 4200mm. Tuyer height, hf, 3600m. The length of the processed surface at the rear end of the tuyere, L plus, 100mm, the protected length of the processed surface at the rear end of the tuyere, L Bao, 0mm.

[0078] The height of the upper part of the tuyere hf 上 = h1-hf=4200-3600=600mm

[0079] According to the reasonable range of the effective bosh angle: 73°~75°, the reasonable range of the length of the tuyere extending into the hearth can be obtained, that is, the reasonable range of the length of the tuyere processed finished product.

[0080] a) The upper limit of the reasonable range of the effective bosh angle is 75°, and the lower limit of the length of the tuyere extending into the furnace hearth. At this time, the length L of the tuyere e...

Embodiment 2

[0088] Effective volume 3600m 3 Blast furnace, known furnace type parameters, furnace waist diameter, D, 14200mm. Bosh height, h2, 3600mm. Hearth diameter, d, 12690mm. Hearth height, h1, 4900mm. Tuyer height, hf, 4300m. The length of the processed surface at the rear end of the tuyere is 100mm, and the protection length of the processed surface at the rear end of the tuyere is 100mm.

[0089] The height of the upper part of the tuyere hf = h1- hf=4900-4300=600mm

[0090] According to the reasonable range of the effective bosh angle: 73°~75°, the reasonable range of the length of the tuyere extending into the hearth can be obtained, that is, the reasonable range of the length of the tuyere processed finished product.

[0091] a) The upper limit of the reasonable range of the effective bosh angle is 75°, and the lower limit of the length of the tuyere extending into the furnace hearth. At this time, the length L of the tuyere extending into the furnace hearth=TAN((90°-α1) / ...

Embodiment 3

[0099] Furnace type parameters of a certain blast furnace, furnace waist diameter, D, 11800mm. Bosh height, h2, 3300mm. Hearth diameter, d, 10400mm. Hearth height, h1, 4500mm. Tuyer height, hf, 3600m.

[0100] The height of the upper part of the tuyere hf 上 = h1-hf=4500-3600=900mm

[0101] The length of the processed surface at the rear end of the tuyere, L plus, 100mm, the protected length of the processed surface at the rear end of the tuyere, L Bao, 0mm. The finished length of tuyere processing (L total), 450mm.

[0102] The length L of the tuyere extending into the hearth = L total - L plus - L protection = 450-100-0 = 350mm

[0103] Calculate the effective belly angle of the blast furnace according to the length of the tuyere extending into the hearth:

[0104] Effective belly angle of blast furnace α1=90°-ATAN(((D-d) / 2+L 内 ) / (h1- hf+h2)) / PI()*180=90°-ATAN(((11800-10400) / 2+350) / (4500-3600+3300)) / PI()*180=76 °.

[0105] The effective bosh angle is 76°, which exc...

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Abstract

The invention relates to a blast furnace tuyere length determination and verification method, and belongs to the technical field of blast furnace ironmaking smelting in the metallurgical industry. According to the technical scheme, calculation is carried out according to the following formula: (1) the length L < inner > of a tuyere extending into a hearth is equal to TAN ((90 degrees-alpha < 1 >) / 180 * PI ()) * (hf < upper > + h2)-(D-d) / 2; (2) the length L < total > of the finished tuyere is equal to the length L < inner > of the tuyere extending into the hearth plus the length L of the tuyere rear-end machining surface plus the length L < protection > of the tuyere rear-end machining surface; the method has the beneficial effects that the proper length of the tuyere processed finished product corresponding to the effective bosh angle can be calculated according to the value of the proper range of the effective bosh angle. Meanwhile, whether the length of the currently used tuyere is reasonable or not is verified according to the calculated effective bosh angle of the blast furnace, so that the adjusting direction of the edge airflow strength is known.

Description

technical field [0001] The invention relates to a method for determining and verifying the length of a tuyere of a blast furnace, and belongs to the technical field of blast furnace ironmaking and smelting in the metallurgical industry. Background technique [0002] The tuyere is the key equipment of the blast furnace air intake system, and it is also an important means of adjusting the lower part. The tuyere includes the large tuyere set, the second set of the tuyere and the small tuyere set. The tuyere usually refers to the small tuyere set. There are two main process parameters that characterize the characteristics of the tuyere, one is the tuyere diameter, and the other is the tuyere length. The diameter of the tuyere affects the kinetic energy of blast furnace blast. The impact of tuyere length on blast furnace smelting is mainly reflected in the distribution of initial gas flow in the hearth. The longer the tuyere length, the more favorable it is to suppress the edge...

Claims

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Application Information

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IPC IPC(8): G06F30/28G06F113/08G06F119/14
CPCG06F30/28G06F2113/08G06F2119/14
Inventor 李志明张杰柴丹安春文王燕飞霍红岩魏航宇
Owner HANDAN IRON & STEEL GROUP
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