CN219052903U

CN219052903U - Ladle steel scrap baking burner

Info

Publication number: CN219052903U
Application number: CN202222945199.8U
Authority: CN
Inventors: 高磊; 李长江; 张海燕
Original assignee: Xinjiang Kunyu Steel Co ltd
Current assignee: Xinjiang Kunyu Steel Co ltd
Priority date: 2022-11-05
Filing date: 2022-11-05
Publication date: 2023-05-23
Anticipated expiration: 2032-11-05

Abstract

The utility model belongs to the field of baking burners, and particularly relates to a steel ladle scrap steel baking burner which comprises a flange gas inlet, a flange air inlet, a wind shield, a gas chamber, a combustion outer cylinder, a combustion-supporting inner cylinder, a gas inner cylinder, a combustion inner cylinder, a flame guide cover, a guide pipe, a flow speed adjusting ring, an automatic ignition device, a counter-rotating vane, a forward rotating vane, a flame arrester and a burner shell, wherein the wind shield is arranged in the burner shell, and the gas chamber is arranged in the burner shell. According to the utility model, by redesigning the internal structure of the burner shell, the combustion nodes are transferred from the outside of the burner shell to the inside of the burner shell, and the flow mode and the mixing mode of combustion supporting air and coal gas in the burner shell are optimized, so that high-speed combustion flame with strong penetrating power and long flame is realized, and when the steel ladle is used for baking the steel scraps, the flame can directly penetrate to the bottom of the steel ladle to realize the full-scale heating of the steel scraps, and the steel scraps baking efficiency is improved.

Description

Ladle steel scrap baking burner

Technical Field

The utility model belongs to the field of baking nozzles, and particularly relates to a steel ladle scrap baking nozzle.

Background

In the current steel-making process of the converter of the iron and steel enterprise, the scrap steel ratio basically reaches about 18%, and in order to reduce the cost and improve the yield, the scrap steel ratio is continuously improved in the smelting process of the converter, but when the scrap steel ratio is improved to a certain level, the improvement is limited by the scrap steel feeding efficiency and the heat balance of the converter, and after the scrap steel enters the converter for converting, all alloy elements in the scrap steel are oxidized into slag, and meanwhile, certain iron loss exists, and particularly for some high-quality scrap steel, the loss is larger after the converter converting. In order to solve the problems, a part of clean high-quality scrap steel is added into a ladle for melting after the furnace, and the oxidation process is not existed in the process, so that iron elements and alloy elements in the scrap steel are all recovered, the scrap steel ratio of converter smelting can be improved, and the alloy consumption can be reduced. However, because the steel ladle is limited by the temperature of molten steel in the ladle after the furnace, the actual adding amount is small, and the preheating technology of the waste steel after the furnace at present mainly utilizes the preheating of the ladle and the heating in the ladle baking process, but the preheating heat of the ladle is small, and a large amount of waste steel cannot be preheated to more than 800 ℃ in a short time. The ladle is used for baking the scrap steel, the upper part of the scrap steel is heated when the ladle is used for baking the scrap steel, the lower part of the scrap steel cannot be effectively heated, the combustion heat efficiency is low, and the gas consumption is high. The utility model discloses a high-efficiency burner, which improves the combustion efficiency and the penetrability of flame and the flame length, and under the condition of 60% of thermal efficiency in 15-20 min, the steel ladle for receiving scrap steel is an online hot repair ladle, so that the temperature of scrap steel below 4 tons and 10mm can be raised to 800-850 ℃ and the consumption of converter gas is about 1700m ³ And/h, solving the problem of preheating the scrap steel after the furnace.

Disclosure of Invention

The utility model aims to provide a ladle scrap steel baking burner, which solves the problems of insufficient flame penetration and short flame of the existing burner.

In order to achieve the aim, the utility model provides a steel ladle scrap steel baking burner which comprises a flange gas inlet, a flange air inlet, a wind shield, a gas chamber, a combustion outer cylinder, a combustion-supporting inner cylinder, a gas inner cylinder, a combustion inner cylinder, a flame guide cover, a guide pipe, a flow speed adjusting ring, an automatic ignition device, a reverse rotating vane, a forward rotating vane, a flame arrester and a burner shell, wherein the wind shield is arranged in the burner shell, the gas chamber is arranged in the burner shell, the combustion-supporting inner cylinder is arranged in the burner shell, the gas inner cylinder is arranged in the burner shell, the combustion inner cylinder is arranged in the burner shell, the flame guide cover is arranged on the combustion inner cylinder, the automatic ignition device is arranged on the burner shell, the reverse rotating vane is arranged in the combustion-supporting inner cylinder, and the forward rotating vane is arranged in the gas inner cylinder.

The principle of the utility model is as follows: after pouring and repairing the ladle, the ladle is conveyed to a repairing span through the iron adding flatcar, an electromagnetic chuck is arranged on the t-day trolley of the repairing span, scrap steel (the scrap steel is supported by a hopper for supporting the scrap steel, the scrap steel is conveyed to the lower part of a scrap steel roaster by the iron adding flatcar after being poured out of the steel flatcar line and deposited on the ground between the iron adding flatcar line, a switch of an automatic ignition device is turned on, converter gas enters a gas chamber through a flange gas inlet, the gas chamber is filled and then enters a combustion inner barrel through a gas inner barrel, a combustion fan is synchronously started at the moment, combustion air enters the combustion outer barrel through a flange air inlet and flows downwards, a wind shield penetrates through the bottom of the burner shell, the combustion air flows to the top of the combustion outer barrel in advance under the action of a heat transfer reinforcing plate when the scrap steel in the ladle is baked, enters the inner barrel after reaching the top of the combustion inner barrel, then enters the combustion inner barrel through a reverse rotation blade, the combustion air and the converter gas fully mixes with the combustion inner barrel at the time, a high-pressure pulse igniter ignites the converter gas, the converter gas burns combustion, and the combustion air flows out of the combustion guide tube after touching the guide tube to influence flame from the flame.

The utility model has the beneficial effects that: according to the utility model, by redesigning the internal structure of the burner shell, the combustion nodes are transferred from the outside of the burner shell to the inside of the burner shell, and the flow mode and the mixing mode of combustion supporting air and coal gas in the burner shell are optimized, so that high-speed combustion flame with strong penetrating power and long flame is realized, and when the steel ladle is used for baking the steel scraps, the flame can directly penetrate to the bottom of the steel ladle to realize the full-scale heating of the steel scraps, and the steel scraps baking efficiency is improved.

Further, the burner shell is provided with a flange gas inlet, and the flange gas inlet is provided with a flame arrester which can avoid flame backflow.

Further, be provided with the stand pipe on the flame guide cover, the inside of stand pipe is provided with the velocity of flow adjusting ring, and the velocity of flow adjusting ring can adjust the gas that flows through.

Further, be provided with flange air inlet on the nozzle shell, flange air inlet with burning urceolus intercommunication, flange air inlet's outside is connected with combustion-supporting fan, can provide the air to the inside of burning urceolus.

Further, the positive rotating vane is fixedly connected with the combustion-supporting inner cylinder, the negative rotating vane is fixedly connected with the automatic ignition device, and the ignition mode of the automatic ignition device is high-voltage pulse ignition.

Furthermore, the number of the anti-rotating blades is eighteen, the eighteen anti-rotating blades are uniformly distributed in the combustion-supporting inner cylinder, the anti-rotating blades are made of stainless steel materials, the thickness is 4.5mm, and the inclination angle of the blades is 30 degrees.

Furthermore, the number of the positive rotating blades is twenty-eight, the twenty-eight positive rotating blades are uniformly distributed in the gas inner cylinder, the positive rotating blades are made of stainless steel materials, the thickness is 4.5mm, and the inclination angle is 5 degrees.

Drawings

FIG. 1 is a schematic view of a ladle scrap baking burner in an embodiment of the utility model;

FIG. 2 is a bottom view of the combustion supporting inner barrel of FIG. 1 of a ladle scrap steel baking burner in accordance with an embodiment of the present utility model.

Detailed Description

The following is a further detailed description of the embodiments:

reference numerals in the drawings of the specification include: flange gas inlet 1, flange air inlet 2, wind guard 3, gas chamber 4, combustion outer cylinder 5, combustion-supporting inner cylinder 6, gas inner cylinder 7, combustion inner cylinder 8, flame guiding cover 9, guide pipe 10, flow rate adjusting ring 11, automatic ignition device 12, reverse rotating vane 13, forward rotating vane 14, flame arrester 15, and burner housing 16.

As shown in fig. 1 and 2, the embodiment provides a ladle scrap steel baking burner, which comprises a flange gas inlet 1, a flange air inlet 2, a wind deflector 3, a gas chamber 4, a combustion outer cylinder 5, a combustion-supporting inner cylinder 6, a gas inner cylinder 7, a combustion inner cylinder 8, a flame guide cover 9, a guide pipe 10, a flow velocity adjusting ring 11, an automatic ignition device 12, a counter-rotating vane 13, a positive rotating vane 14, a flame arrester 15 and a burner shell 16, wherein the wind deflector 3 is arranged in the burner shell 16, the flange gas inlet 1 is arranged on the burner shell 16, the flame arrester 15 is arranged on the flange gas inlet 1, flame backflow can be avoided by the flame arrester 15, the guide pipe 10 is arranged on the flame guide cover 9, the flow velocity adjusting ring 11 is arranged in the guide pipe 10, and the flow velocity adjusting ring 11 can adjust flowing gas.

As shown in fig. 1 and 2, a gas chamber 4 is arranged in a burner shell 16, a combustion-supporting inner cylinder 6 is arranged in the burner shell 16, a gas inner cylinder 7 is arranged in the burner shell 16, a combustion inner cylinder 8 is arranged in the burner shell 16, a flange air inlet 2 is arranged on the burner shell 16, the flange air inlet 2 is communicated with a combustion outer cylinder 5, a combustion-supporting fan is connected to the outer side of the flange air inlet 2, air can be provided for the interior of the combustion outer cylinder 5, a positive rotating vane 14 is fixedly connected with the combustion-supporting inner cylinder 6, a reverse rotating vane 13 is fixedly connected with an automatic ignition device 12, and an ignition mode of the automatic ignition device 12 is high-voltage pulse ignition.

As shown in fig. 1 and 2, the flame guide cover 9 is arranged on the combustion inner cylinder 8, the automatic ignition device 12 is arranged on the burner shell 16, the counter-rotating blades 13 are arranged in the combustion inner cylinder 6, the positive-rotating blades 14 are arranged in the gas inner cylinder 7, the number of the counter-rotating blades 13 is eighteen, the eighteen counter-rotating blades 13 are uniformly distributed in the combustion inner cylinder 6, the counter-rotating blades 13 are made of 316 stainless steel materials, the thickness is 4.5mm, the blade inclination angle is 30 degrees, the number of the positive-rotating blades 14 is twenty-eight, the twenty-eight positive-rotating blades 14 are uniformly distributed in the gas inner cylinder 7, the positive-rotating blades 14 are made of 316 stainless steel materials, the thickness is 4.5mm, and the inclination angle is 5 degrees.

The specific implementation process of the utility model is as follows: after pouring and repairing the ladle, the ladle is conveyed to a repairing span through an iron adding flat car, an electromagnetic chuck is arranged on a 50t crown block of the repairing span, scrap steel (the scrap steel is supported by a hopper and stored on the ground between a steel adding flat car line and the iron adding flat car line) is added into the ladle, the ladle is conveyed to the lower part of a scrap steel roaster by the iron adding flat car after the ladle is poured, a switch of an automatic ignition device 12 is turned on, converter gas enters a gas chamber 4 through a flange gas inlet 1, the converter gas enters a combustion inner cylinder 8 through a gas inner cylinder 7 after filling the gas chamber 4, a combustion fan is synchronously started at this time, combustion air enters a combustion outer cylinder 5 through a flange air inlet 2 and flows downwards, a wind deflector 3 passes through the bottom of a burner shell 16, the combustion air is preheated in advance by the action of a heat transfer reinforcing plate when the scrap steel in the ladle is baked through the position, the combustion air flows through the top of the plate 3, enters the inner cylinder 6 after reaching the top, then enters the combustion inner cylinder 8 through 28 anti-rotation blades 13, the combustion inner cylinder 8 is fully mixed with the combustion air after the combustion inner cylinder 8, the combustion air flows out of the converter gas chamber through a flange gas inlet 2, and the combustion air deflector 10 is ignited after the combustion air is fully, and the combustion air flows out of the combustion inner cylinder is ignited, and the combustion air guide tube is impacted by a flame guide flame 9.

According to the utility model, by redesigning the internal structure of the burner shell 16, the combustion nodes are transferred from the outside of the burner shell 16 to the inside of the burner shell 16, and the flow mode and the mixing mode of combustion air and coal gas in the burner shell 16 are optimized, so that high-speed combustion flame with strong penetrating power and long flame length is realized, and when the steel ladle is used for baking the steel scraps, the flame can directly penetrate to the bottom of the steel ladle to realize the full-scale heating of the steel scraps, and the steel scraps baking efficiency is improved.

It should be noted in advance that, in the present utility model, unless explicitly specified and limited otherwise, terms such as "mounted," "connected," "fixed," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The foregoing is merely exemplary embodiments of the present utility model, and specific structures and features that are well known in the art are not described in detail herein. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present utility model, and these should also be considered as the scope of the present utility model, which does not affect the effect of the implementation of the present utility model and the utility of the patent. The protection scope of the present application shall be subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.

Claims

1. The utility model provides a ladle steel scrap toasts nozzle, includes flange gas inlet, flange air inlet, deep bead, gas chamber, burns urceolus, combustion-supporting inner tube, gas inner tube, burns inner tube, flame guide cover, stand pipe, velocity of flow adjusting ring, auto-ignition device, anti-rotating vane, positive rotating vane, flame arrester, nozzle shell, its characterized in that: the inside of nozzle shell is provided with the deep bead, the inside of nozzle shell is provided with the coal gas chamber, the inside of nozzle shell is provided with combustion-supporting inner tube, the inside of nozzle shell is provided with the gas inner tube, the inside of nozzle shell is provided with the burning inner tube, be provided with the flame guide cover on the burning inner tube, be provided with automatic ignition device on the nozzle shell, the inside of combustion-supporting inner tube is provided with the counter-rotating vane, the inside of gas inner tube is provided with the corotation vane.

2. The ladle scrap baking burner according to claim 1, wherein: the burner is characterized in that a flange gas inlet is formed in the burner shell, and a flame arrester is arranged on the flange gas inlet.

3. The ladle scrap baking burner according to claim 1, wherein: the guide flame cover is provided with a guide pipe, and a flow velocity adjusting ring is arranged in the guide pipe.

4. The ladle scrap baking burner according to claim 1, wherein: the burner shell is provided with a flange air inlet which is communicated with the combustion outer cylinder.

5. The ladle scrap baking burner according to claim 1, wherein: the positive rotating vane is fixedly connected with the combustion-supporting inner cylinder, and the negative rotating vane is fixedly connected with the automatic ignition device.

6. The ladle scrap baking burner according to claim 1, wherein: the number of the anti-rotating blades is eighteen, and the eighteen anti-rotating blades are uniformly distributed in the combustion-supporting inner cylinder.

7. The ladle scrap baking burner according to claim 1, wherein: the number of the positive rotating blades is twenty-eight, and the twenty-eight positive rotating blades are uniformly distributed in the gas inner cylinder.