Blast-furnace tuyere small sleeve inner hole structure capable of being fully utilized

Abstract

The utility model discloses a fully utilized inner hole structure of a blast-furnace tuyere small sleeve, relates to the technical field of blast-furnace tuyere small sleeves, and aims to solve the problems that the existing blast-furnace tuyere small sleeve is harsh in working environment, is easy to damage under the conditions of tuyere blockage, non-uniform airflow distribution at the upper part of a blast furnace or airflow fluctuation, and is not easy to damage. Meanwhile, molten iron makes direct contact with the copper wall of a small sleeve, heat flow drastically increases within an extremely short time, small sleeve melting loss can be caused, meanwhile, a necking lining is installed in the small sleeve, the size of the lining is not appropriate, the lining cannot be flush with the front section of the small sleeve, airflow entering a furnace is disordered, blast furnace inlet airflow is disordered, and the furnace condition is worsened. According to the technical scheme, the small sleeve is characterized by comprising a small sleeve body, a small sleeve air channel is formed in the center of the interior of the small sleeve body, a front air opening is reserved in the other end, located on the outer side of the small sleeve air channel, of the interior of the small sleeve body, and a surfacing layer is arranged on the outer side of the small sleeve body. And the effects of stable work, cost reduction and efficiency improvement are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of blast furnace tuyere small sleeve, especially to a full use's blast furnace tuyere small sleeve inner hole structure. BACKGROUND

[0002] The blast furnace tuyere small sleeve is an important component of the blast furnace injection equipment, and the small sleeve is the air inlet of the tuyere and is the place where the injection equipment sprays high-pressure air, and its main task is to effectively send hot air into the blast furnace to maintain the normal smelting process inside the blast furnace, and the structural design of the blast furnace tuyere small sleeve enables it to work in extreme environments, the front end of the small sleeve is in a high-temperature environment of nearly 2000 degrees Celsius, the slag iron melt temperature exceeds 1400 degrees Celsius, and the hot air temperature passing through is also above 1000 degrees Celsius, in order to cope with such a harsh working environment, the tuyere small sleeve is usually made of copper material and has cooling water inside to maintain its working state.

[0003] The prior art scheme has the following defects: the existing blast furnace tuyere small sleeve has a harsh working environment, in the case of blocked tuyere, uneven air distribution or air flow fluctuation in the upper part of the blast furnace, the small sleeve is easily damaged, the molten iron directly contacts the copper wall of the small sleeve, the heat flow increases sharply in a very short time, and the small sleeve is also melted and damaged, after the small sleeve is damaged, the blast furnace must be handled, which affects the blast furnace output on the one hand and causes the fuel consumption to increase on the other hand, and a necked-in lining is also installed in the small sleeve, the lining size is not suitable for being flush with the front end of the small sleeve, air flow entering the furnace is disordered, and the blast furnace air flow is disordered to cause the deterioration of the furnace condition. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a full use's blast furnace tuyere small sleeve inner hole structure.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A full use's blast furnace tuyere small sleeve inner hole structure, including the small sleeve main part, the center of the small sleeve main part inside is provided with the small sleeve air duct, the inside of the small sleeve main part is reserved with the spherical surface that cooperates with the straight blow pipe at one end outside the small sleeve air duct, the other end outside the small sleeve air duct in the inside of the small sleeve main part is reserved with the front tuyere, the outside of the small sleeve main part is provided with the surfacing layer.

[0007] By adopting the above technical scheme, the surfacing layer is added at the position of the internal air duct of the tuyere small sleeve, the surfacing is carried out at the position of the front tuyere, and then the structure after surfacing is processed, and the processing is carried out according to the actual situation on the site, so as to meet the needs.

[0008] Furthermore, a first annular cooling cavity is provided on one side of the interior of the small sleeve body, a second annular cooling cavity is provided inside the interior of the small sleeve body, a water outlet is reserved at one end of the outer side of the small sleeve body, a water inlet is reserved at the other end of the outer side of the small sleeve body, and a third annular cooling cavity is provided inside the small sleeve body outside the second annular cooling cavity.

[0009] By adopting the above technical solution, the cooling chamber can improve the cooling effect of the air outlet sleeve, enabling the device to be used normally and extending its service life.

[0010] Furthermore, both the small sleeve body and the small sleeve air duct adopt an inclined structure. One end of the weld overlay extends into the interior of the front air vent and is in close contact with the inner side of the front air vent. The weld overlay and the small sleeve body are welded together, and the thickness of the weld overlay is ≥2mm.

[0011] By adopting the above technical solution, based on the current small-set production process, in order to avoid increasing the consumption of air vent sleeves, the inside of the small set can be processed by welding, and then machined or ground according to the area of ​​the air vent used. The welding material is pure copper or wear-resistant material that is the same as the material of the small set body.

[0012] Furthermore, the water inlet is connected to the first annular cooling chamber, the first annular cooling chamber is connected to the second annular cooling chamber, the second annular cooling chamber is connected to the third annular cooling chamber, and the third annular cooling chamber is connected to the water outlet.

[0013] By adopting the above technical solution, the effect of adjusting the air supply volume can be achieved.

[0014] In summary, the beneficial technical effects of this utility model are as follows:

[0015] A weld overlay layer was adopted, and the inner diameter of the existing air outlet sleeve was heated and welded to make the inner surface meet the dimensional requirements of use, thereby improving the reuse of the air outlet sleeve. After the modification, the front end of the sleeve can effectively stabilize the swirling zone, making the airflow more stable.

[0016] After welding, it is fused with the air outlet body as one piece, making the structure more stable, reducing the purchase quantity of air outlet sleeves, extending the service life of the small air outlet sleeves online, and reducing production costs.

[0017] The purpose of internal hole overlay welding is: 1. to adjust the air supply volume (required by the blast furnace production process); 2. to increase wear resistance (extend service life), resulting in stable operation and cost reduction and efficiency improvement. Attached Figure Description

[0018] Figure 1 This is a schematic cross-sectional view of the present invention. Figure 1 ;

[0019] Figure 2 The sectional structure diagram of the present utility model Figure 2 .

[0020] In the figure, 1, small sleeve main body; 2, small sleeve air duct; 3, spherical surface; 4, front tuyere; 5, cladding layer; 6, first annular cooling cavity; 7, second annular cooling cavity; 8, water inlet; 9, water outlet; 10, third annular cooling cavity. DETAILED DESCRIPTION

[0021] The present utility model will be further described in detail below with reference to the drawings.

[0022] Referring to Figures 1-2 , a fully utilized blast furnace tuyere small sleeve inner hole structure, including small sleeve main body 1, the center of small sleeve main body 1 inside is provided with small sleeve air duct 2, one end of small sleeve main body 1 inside at the outside of small sleeve air duct 2 is reserved with spherical surface 3 matched with the straight blast pipe, the other end of small sleeve main body 1 inside at the outside of small sleeve air duct 2 is reserved with front tuyere 4, the outside of small sleeve main body 1 is provided with cladding layer 5, one side of small sleeve main body 1 inside is provided with first annular cooling cavity 6, small sleeve main body 1 inside is provided with second annular cooling cavity 7, one end of small sleeve main body 1 outside is reserved with water outlet 9, the other end of small sleeve main body 1 outside is reserved with water inlet 8, small sleeve main body 1 inside at the outside of second annular cooling cavity 7 is provided with third annular cooling cavity 10, the cladding layer 5 is added in the internal air duct position of tuyere small sleeve, can be through the position of front tuyere 4 cladding, then the structure after cladding is processed, processing is according to the actual situation of the scene and is processed, to meet the needs, cooling cavity can improve the cooling effect of tuyere small sleeve, so that the device can be used normally, delay service life, on the basis of the current small sleeve production process, to avoid increasing tuyere sleeve consumption, can be processed in the small sleeve inside cladding, then according to the area of the tuyere used lathe processing or polishing treatment, the cladding material quality is welded with the same pure copper or wear-resistant material as the small sleeve body material.

[0023] As Figures 1-2 shown, small sleeve main body 1 and small sleeve air duct 2 adopt inclined structure, one end of cladding layer 5 extends to the inside of front tuyere 4, and is mutually attached with the inside of front tuyere 4, cladding layer 5 and small sleeve main body 1 are weldedly connected, the thickness of cladding layer 5 is ≥2mm, water inlet 8 and first annular cooling cavity 6 are mutually connected, first annular cooling cavity 6 and second annular cooling cavity 7 are mutually connected, second annular cooling cavity 7 and third annular cooling cavity 10 are mutually connected, third annular cooling cavity 10 and water outlet 9 are mutually connected.

[0024] The implementation principle of the embodiment is that the build-up layer 5 is first installed on the outside of the small sleeve body 1 and the inside of the front air port 4 inside the small sleeve body 1, and then welding is started to weld the build-up layer 5 and the small sleeve body 1 into an integrated whole, so that the overall structure is more stable, the inner diameter of the air duct is changed through welding, and the structure after welding is processed through a processing device, so as to meet the actual use requirements on site. The build-up layer technology can effectively avoid the disadvantages of blocked air port production and small sleeve internal installation of the lock hole lining, so that the airflow distribution is more uniform.

[0025] The embodiments of the specific embodiment are preferred embodiments of the utility model, and do not limit the protection scope of the utility model, so that: equivalent changes made according to the structure, shape and principle of the utility model should be covered in the protection scope of the utility model.

Claims

1. A fully utilized blast furnace tuyere small sleeve inner hole structure, comprising a small sleeve main body (1), characterized in that: The center of the small sleeve body (1) is provided with a small sleeve air duct (2), one end of the inside of the small sleeve body (1) outside the small sleeve air duct (2) is reserved for a spherical surface (3) matched with a straight blowing pipe, the other end of the inside of the small sleeve body (1) outside the small sleeve air duct (2) is reserved for a front air port (4), and the outside of the small sleeve body (1) is provided with a surfacing layer (5).

2. The utilized blast furnace tuyere inner bore structure of claim 1, wherein: One side of the inside of the small sleeve body (1) is provided with a first annular cooling cavity (6), the inside of the small sleeve body (1) is provided with a second annular cooling cavity (7), one end of the outside of the small sleeve body (1) is reserved for a water outlet (9), the other end of the outside of the small sleeve body (1) is reserved for a water inlet (8), and the inside of the small sleeve body (1) outside the second annular cooling cavity (7) is provided with a third annular cooling cavity (10).

3. The optimized blast furnace tuyere inner sleeve structure according to claim 1, characterized in that: The small sleeve body (1) and the small sleeve air duct (2) are both in an inclined structure, one end of the surfacing layer (5) extends to the inside of the front air port (4) and is mutually attached to the inside of the front air port (4), the surfacing layer (5) and the small sleeve body (1) are welded and connected, and the thickness of the surfacing layer (5) is greater than or equal to 2 mm.

4. The utilized blast furnace tuyere small bush inner bore structure according to claim 2, characterized in that: The water inlet (8) and the first annular cooling cavity (6) are mutually communicated, the first annular cooling cavity (6) and the second annular cooling cavity (7) are mutually communicated, the second annular cooling cavity (7) and the third annular cooling cavity (10) are mutually communicated, and the third annular cooling cavity (10) and the water outlet (9) are mutually communicated.

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