Heat-preservation smelting blast furnace air supply device

Abstract

A heat preservation smelting blast furnace air supply device comprises a furnace body, a tuyere sleeve is arranged on the furnace body, an air supply mechanism is installed in an air supply outlet and comprises an air supply pipe, a telescopic piece is installed at the top end of the air supply pipe, and an inner heat preservation mechanism and an outer heat preservation mechanism are installed at the end, close to the tuyere sleeve, of the air supply pipe. The inner heat preservation mechanism and the outer heat preservation mechanism are arranged between the furnace body tuyere sleeve and the blast pipe, installation holes are formed in the two sides of the sealing baffle, positioning pins are arranged in the installation holes, and the positioning pins penetrate through the sealing baffle to be installed outside the tuyere sleeve. A sealing baffle and a fireproof layer in the outer heat preservation mechanism are fixedly installed through a positioning pin to conduct external leakage-proof sealing treatment on the tuyere sleeve, the inner heat preservation mechanism can achieve further sealing in the tuyere sleeve through cooperation of a fireproof plate and two sets of sealing blocks when an air supply pipe stretches in, it is guaranteed that the temperature in the blast furnace is not leaked, and the heat preservation effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of blast furnace air supply, in particular to an insulating smelting blast furnace air supply device. Background Art

[0002] Blast furnaces all use air supply branch pipe equipment to supply air. Pressurized hot air is sent in. The pipes will expand and lengthen after being heated. In order to offset the damage to the pipes caused by the uncontrollable displacement generated by the expansion, the high-temperature gas leakage generated at the connection between the air supply branch pipe and the blast furnace will inevitably cause damage to the air supply branch pipe, such as rupture, which will cause the air supply branch pipe to fail to work normally, resulting in temperature leakage inside the blast furnace and poor insulation effect, forcing the blast furnace to be shut down for maintenance, ultimately causing huge economic losses to the steel plant.

[0003] Therefore, in view of the shortcomings of the prior art, it is necessary to provide a heat-insulating smelting blast furnace air supply device to solve the shortcomings of the prior art. Utility Model Content

[0004] The purpose of the utility model is to avoid the deficiencies of the prior art and provide an insulated smelting blast furnace air supply device, which performs double-layer leak-proof insulation by arranging an inner insulation mechanism and an outer insulation mechanism between the furnace body tuyere sleeve and the air supply pipe, the sealing baffle and the refractory layer in the outer insulation mechanism are fixedly installed by positioning pins to perform external leak-proof sealing treatment on the tuyere sleeve, and the inner insulation mechanism can achieve further sealing inside the tuyere sleeve through the cooperation of the refractory plate and the two groups of sealing blocks when the air supply pipe is extended, thereby ensuring that the temperature in the blast furnace is not leaked and improving the insulation effect.

[0005] The above-mentioned purpose of the utility model is achieved through the following technical means.

[0006] Provided is a heat-insulating smelting blast furnace air supply device, comprising a furnace body, a tuyere sleeve is provided on the furnace body, an air supply mechanism is installed in the tuyere sleeve, the air supply mechanism comprises an air supply pipe, a telescopic member is installed at the top of the air supply pipe, and an inner heat-insulating mechanism and an outer heat-insulating mechanism are installed at one end of the air supply pipe close to the tuyere sleeve;

[0007] The external heat preservation mechanism comprises a sealing baffle, and mounting holes are provided on both sides of the sealing baffle, and positioning pins are provided in the mounting holes, and the positioning pins penetrate the sealing baffle and are installed outside the air inlet sleeve;

[0008] The internal heat-insulating mechanism comprises two groups of fire-resistant plates, which are arranged inside the air inlet sleeves, and two groups of sealing blocks are respectively arranged inside the two groups of fire-resistant plates.

[0009] Specifically, the tuyere sleeve is a trapezoidal structure, and the tuyere sleeve comprises a large tuyere sleeve, a middle tuyere sleeve and a small tuyere sleeve in sequence, and the small tuyere sleeve and the end of the air supply pipe penetrate into the interior of the furnace body.

[0010] Specifically, a fire-resistant layer is provided between the sealing baffle and the tuyere sleeve, and the positioning pin penetrates the sealing baffle and the fire-resistant layer at the same time and is fixed to the outside of the tuyere sleeve.

[0011] Specifically, both ends of the sealing baffle are respectively provided with triangular edging, and the mounting holes are opened at the edges of the triangular edging.

[0012] Specifically, the two groups of sealing blocks are obliquely arranged inside the fireproof board, and the two groups of sealing blocks are fitted together.

[0013] The utility model performs double-layer leakage-proof insulation by means of an inner insulation mechanism and an outer insulation mechanism arranged between the furnace body tuyere sleeve and the air supply pipe; the sealing baffle and the refractory layer in the outer insulation mechanism are fixedly installed through positioning pins to perform external leakage-proof sealing treatment on the tuyere sleeve; when the air supply pipe is extended, the inner insulation mechanism can further seal the tuyere sleeve through the cooperation of the refractory plate and the two groups of sealing blocks, thereby ensuring that the temperature in the blast furnace is not leaked and improving the insulation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is further described with reference to the accompanying drawings, but the contents in the accompanying drawings do not constitute any limitation to the present invention.

[0015] Figure 1 The utility model is a front view of a heat-insulating smelting blast furnace air supply device.

[0016] Figure 2 It is a partial enlarged view of an inner heat-insulating mechanism in a heat-insulating blast furnace air supply device of the utility model.

[0017] Figure 3 It is a partial enlarged view of the internal and external insulation mechanisms of an insulation blast furnace air supply device of the utility model.

[0018] from Figures 1 to 3 Including:

[0019] 1. Air inlet sleeve;

[0020] 2. Air supply mechanism;

[0021] 3. Air supply duct;

[0022] 4. Telescopic parts;

[0023] 5. Internal insulation mechanism;

[0024] 6. External insulation mechanism;

[0025] 7. Sealing baffle;

[0026] 8. Mounting holes;

[0027] 9. Positioning pin;

[0028] 10. Fire-resistant board;

[0029] 11. Sealing block;

[0030] 12. Large tuyere set;

[0031] 13. Tuyere middle set;

[0032] 14. Small air outlet cover;

[0033] 15. Refractory layer;

[0034] 16. Triangular edging. DETAILED DESCRIPTION

[0035] The utility model is further described in conjunction with the following embodiments.

[0036] Example 1.

[0037] like Figure 1-3 As shown, an insulated smelting blast furnace air supply device includes a furnace body, a tuyere sleeve 1 is opened on the furnace body, an air supply mechanism 2 is installed in the tuyere sleeve 1, the air supply mechanism 2 includes an air supply pipe 3, a telescopic part 4 is installed on the top of the air supply pipe 3, and an inner insulation mechanism 5 and an outer insulation mechanism 6 are installed at one end of the air supply pipe 3 close to the tuyere sleeve 1.

[0038] During the blast furnace air supply process, the air supply pipe 3 in the air supply mechanism 2 is used to transmit wind through the tuyere sleeve 1 to the inside of the blast furnace. At the same time, the telescopic part 4 installed on the air supply pipe 3 prevents the air supply pipe 3 from deforming at high temperature and performs certain temperature compensation. After the air supply pipe 3 is extended into the tuyere sleeve 1, it is double-leak-proofed and insulated through the internal insulation mechanism 5 and the external insulation mechanism 6, thereby improving the blast furnace air supply efficiency.

[0039] The external heat preservation mechanism 6 comprises a sealing baffle 7 , and mounting holes 8 are provided on both sides of the sealing baffle 7 . Positioning pins 9 are arranged in the mounting holes 8 . The positioning pins 9 penetrate the sealing baffle 7 and are installed outside the air outlet sleeve 1 .

[0040] When the blast furnace is supplied with air, the sealing baffle 7 is fixed to the outside of the tuyere sleeve 1 by passing the positioning pin 9 through the installation hole 8 opened on the sealing baffle 7. The installation of the sealing plate prevents the heat loss caused by leakage at the installation point of the tuyere sleeve 1 and the air supply pipe 3, and at the same time can play a leak-proof and heat-insulating effect in the process of the air supply pipe 3 supplying air to the blast furnace.

[0041] The internal insulation mechanism 5 includes two groups of fire-resistant plates 10, and the fire-resistant plates 10 are arranged inside the air outlet sleeve 1. Two groups of sealing blocks 11 are respectively arranged inside the two groups of fire-resistant plates 10. The sealing blocks 11 installed inside the two groups of fire-resistant plates 10 can perform leak-proof treatment inside the air outlet sleeve 1. When the air supply pipe 3 is extended into the air outlet sleeve 1, it can fit with the fire-resistant plates 10. At this time, the sealing blocks 11 arranged on the fire-resistant plates 10 can play an isolation and leak-proof effect, increase the thermal insulation performance and reduce the heat energy consumption.

[0042] The tuyere sleeve 1 is a trapezoidal structure, which includes a large tuyere sleeve 12, a medium tuyere sleeve 13 and a small tuyere sleeve 14 in sequence. The small tuyere sleeve 14 and the end of the air supply pipe 3 penetrate into the interior of the furnace body. The stepped setting of the tuyere sleeve 1 can reduce heat loss. Since the diameter of the small tuyere sleeve 14 is smaller than that of the large tuyere sleeve 12, the heat inside the blast furnace is not easily lost, which has a certain thermal insulation effect.

[0043] A fire-resistant layer 15 is arranged between the sealing baffle 7 and the air outlet sleeve 1. The positioning pin 9 penetrates both the sealing baffle 7 and the fire-resistant layer 15 and is fixed to the outside of the air outlet sleeve 1. The installation of the fire-resistant layer 15 avoids direct contact between the sealing baffle 7 and the air outlet sleeve 1. At the same time, the positioning pin 9 is fixed to further seal the air outlet sleeve 1, thereby achieving a thermal insulation effect and ensuring the usability and installation of the sealing baffle 7.

[0044] Triangular edging 16 is provided at both ends of the sealing baffle 7, and the mounting hole 8 is opened at the edge of the triangular edging 16. The setting of the triangular edging 16 can make the sealing baffle 7 and the fire-resistant layer 15 fit more closely after installation to fill the gaps on both sides and improve the insulation effect.

[0045] The two groups of sealing blocks 11 are obliquely arranged inside the fire-resistant board 10, and the two groups of sealing blocks 11 are fitted together. The oblique arrangement of the two groups of sealing blocks 11 inside the fire-resistant board 10 can better fit the air supply pipe 3 extending into the air outlet sleeve 1. At the same time, due to the stepped arrangement of the air outlet sleeve 1, the obliquely arranged sealing blocks 11 can better seal and better insulate the air outlet sleeve 1.

[0046] During the production process, double-layer leak-proof insulation is performed by the inner insulation mechanism 5 and the outer insulation mechanism 6 arranged between the furnace body tuyere sleeve 1 and the air supply pipe 3. The sealing baffle 7 and the refractory layer 15 in the outer insulation mechanism 6 are fixedly installed by the positioning pin 9 to perform external leak-proof sealing on the tuyere sleeve 1. When the air supply pipe 3 is extended, the inner insulation mechanism 5 can achieve further sealing inside the tuyere sleeve 1 through the cooperation of the refractory plate 10 and the two groups of sealing blocks 11, thereby ensuring that the temperature inside the blast furnace is not leaked and improving the insulation effect.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit the protection scope of the utility model. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the utility model.

Claims

1. A heat-insulating smelting blast furnace air supply device, characterized in that: The furnace body comprises a furnace body, a tuyere sleeve is provided on the furnace body, an air supply mechanism is installed in the tuyere sleeve, the air supply mechanism comprises an air supply pipe, a telescopic member is installed at the top of the air supply pipe, and an inner heat preservation mechanism and an outer heat preservation mechanism are installed at one end of the air supply pipe close to the tuyere sleeve; The external heat preservation mechanism comprises a sealing baffle, and mounting holes are provided on both sides of the sealing baffle. Positioning pins are provided in the mounting holes, and the positioning pins penetrate the sealing baffle and are mounted on the outside of the air outlet sleeve; The internal heat-insulating mechanism comprises two groups of fire-resistant plates, and the fire-resistant plates are arranged inside the air port sleeve. Two groups of sealing blocks are respectively arranged inside the two groups of fire-resistant plates.

2. The heat-insulating smelting blast furnace air supply device according to claim 1, characterized in that: The tuyere sleeve is a trapezoidal structure, and the tuyere sleeve comprises a large tuyere sleeve, a middle tuyere sleeve and a small tuyere sleeve in sequence. The small tuyere sleeve and the end of the air supply pipe penetrate into the interior of the furnace body.

3. The heat-insulating smelting blast furnace air supply device according to claim 2, characterized in that: A fire-resistant layer is arranged between the sealing baffle and the tuyere sleeve, and the positioning pin penetrates through the sealing baffle and the fire-resistant layer at the same time and is fixed to the outside of the tuyere sleeve.

4. The heat-insulating smelting blast furnace air supply device according to claim 3, characterized in that: The two ends of the sealing baffle are respectively provided with triangular edgings, and the mounting holes are opened at the edges of the triangular edgings.

5. The heat-insulating blast furnace air supply device according to claim 4, characterized in that: The two groups of sealing blocks are obliquely arranged inside the fireproof board, and the two groups of sealing blocks are fitted and installed.

Images