A double-bin heating furnace for steelmaking auxiliary materials

Abstract

The present invention discloses a double-bin heating furnace for steelmaking auxiliary materials, comprising a furnace body, wherein the furnace body is divided into two left and right bins, and a double-bin drainage pipe and an exhaust pipe are arranged between the two bins; a partition is arranged in each bin, and the partition divides the bin into a heating chamber located at the lower part and an exhaust gas collection chamber located at the upper part; gas pipelines and oxygen pipelines are respectively formed on the outer walls of both sides of the furnace body, and the gas pipelines and oxygen pipelines are connected to the heating guns inserted into the bins. The double-bin heating furnace of the present invention increases the heating time of single-bin materials and ensures the temperature of the discharge material by preheating. The present invention has an ingenious structure and strong practicality, and can effectively reduce the heating cost of steelmaking auxiliary materials, shorten the smelting time, and improve the efficiency of steel smelting.

Description

Technical Field

[0001] The invention relates to the technical field of steelmaking, and in particular to a double-bin heating furnace for steelmaking auxiliary materials. Background Art

[0002] During smelting, the auxiliary materials need to be heated before being added to the electric furnace, thereby increasing the reaction rate between the auxiliary materials and the molten steel and improving the smelting efficiency. At present, in order to further improve the efficiency of steel smelting and reduce smelting costs, the smelting cycle needs to be further shortened, which puts higher requirements on the heating of auxiliary materials, and the auxiliary materials need to be heated to the required temperature in a shorter time. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a double-bin heating furnace for steelmaking auxiliary materials.

[0004] The present invention is achieved by adopting the following technical solutions.

[0005] A double-bin heating furnace for steelmaking auxiliary materials comprises a furnace body, wherein the furnace body is divided into two left and right bins, and a double-bin drainage pipe and an exhaust pipe are arranged between the two bins; a partition is arranged in each bin body, and the partition divides the bin body into a heating chamber located at the lower part and an exhaust gas collecting chamber located at the upper part; a gas pipeline and an oxygen pipeline are respectively formed on the outer walls on both sides of the furnace body, and the gas pipeline and the oxygen pipeline are connected to a heating gun inserted into the bin body.

[0006] Furthermore, a plurality of waste gas recovery pipelines are formed on the inner wall of the furnace body, the lower end of the waste gas recovery pipeline is located at the bottom of the bin body, and the upper end is located in the waste gas collecting chamber.

[0007] Furthermore, two double-bin drainage pipes are provided between the two bin bodies, and a valve body is provided on the double-bin drainage pipes.

[0008] Furthermore, a reversing valve is provided on the exhaust pipe.

[0009] Furthermore, each bin of the furnace body is connected to a feed pipe, and the free end of the feed pipe is connected to a distributor.

[0010] Furthermore, a discharge valve is provided at the bottom of each bin of the furnace body.

[0011] This application has the following beneficial effects.

[0012] (1) The oxygen and fuel gas required for combustion in the present invention crawl to the furnace top through the outer wall of the furnace body respectively. While cooling the furnace body, the temperature of the furnace body can also heat the gas, thereby improving the reaction efficiency;

[0013] (2) The furnace of the present invention is provided with an exhaust gas drainage structure, and the combustion exhaust gas creeps from the bottom of the inner wall of the bin to the exhaust gas collection chamber on the upper part of the bin, and the heat energy of the exhaust gas is used to heat the furnace wall to maintain the temperature in the bin and reduce losses;

[0014] (3) When heating a single bin, a drainage pipe is designed to lead the high-temperature exhaust gas extracted from the hot bin into the heating chamber of the cold bin, and then the exhaust gas crawls through the bottom and inner wall of the cold bin to the exhaust gas collection chamber of the cold bin, thereby making full use of the heat energy, reducing losses, improving the utilization efficiency, and reducing cost output, thereby raising the basic temperature for reheating the cold bin;

[0015] (4) The present invention increases the heating time of a single bin material by preheating, and can heat the auxiliary material to the required temperature in a shorter time, thus shortening the smelting cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention;

[0017] Figure 2 is a side view of the present invention;

[0018] Figure 3 It is a cross-sectional view of the present invention.

[0019] Among them, 1. furnace body; 2. first bin body; 3. second bin body; 4. distributor; 5. feed pipe; 6. discharge valve; 7. first double bin drainage pipe; 8. exhaust pipe; 9. second double bin drainage pipe; 10. valve body; 11. reversing valve; 12. gas pipeline; 13. oxygen pipeline; 14. ignition burner; 15. partition; 16. waste gas recovery pipeline; 17. furnace body mounting frame. DETAILED DESCRIPTION

[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] like Figure 1-3 As shown, a double-bin heating furnace for steelmaking auxiliary materials includes a furnace body 1, which is mounted on a furnace body mounting frame 17.

[0022] The furnace body 1 is divided into two left and right bins, namely the first bin 2 and the second bin 3. The first bin 2 and the second bin 3 are both connected to the feed pipe 5, and the free end of the feed pipe 5 is connected to the distributor 4, which is preferably an electro-hydraulic three-way distributor, and the distributor 4 is used to control the feed of the two bins. The first bin 2 and the second bin 3 are both provided with a discharge valve 6 at the bottom, and the discharge valve 6 can be a plug valve, and the discharge valve 6 is used to control the discharge of the two bins. Different weight level marks are provided in the first bin 2 and the second bin 3, which can be specifically divided into 1.5 tons level and 2.5 tons level.

[0023] Each of the bins is provided with a partition 15, which divides the bin into a heating chamber at the bottom and an exhaust gas collection chamber at the top. A plurality of exhaust gas recovery pipes 16 are formed on the inner wall of the furnace body 1, and the lower end of the exhaust gas recovery pipe 16 is located at the bottom of the bin (inside the heating chamber), and the upper end is located in the exhaust gas collection chamber. Specifically, the exhaust gas recovery pipe 16 is a wind duct formed by slotting inside the bin wall, and a hole (air induction hole) is left at the bottom of the furnace, which is closed with a cover plate. The setting of the exhaust gas collection chamber can ensure the tightness of the gas collection on the inner wall of each side panel, and the air duct drainage effect is good. The exhaust gas drainage structure designed in this application is to use the thermal energy of the exhaust gas to heat the furnace wall, maintain the temperature in the bin, and reduce losses.

[0024] An exhaust pipe 8 is provided between the two bins at the top of the furnace body 1, and a reversing valve 11 is provided on the exhaust pipe 8, which is used to switch the exhaust of the first bin 2 and the second bin 3. The combustion exhaust gas passes through the air inlet and crawls through the inner wall of the bin to the exhaust gas collection chamber at the top of the bin, and the exhaust gas collection chamber is connected to the dust collector through the exhaust pipe 8 and leads to the outside.

[0025] The present application also provides a double-bin drainage pipe between the two bins at the top of the furnace body 1, and the double-bin drainage pipe includes a first double-bin drainage pipe 7 and a second double-bin drainage pipe 9. One end of the first double-bin drainage pipe 7 is inserted into the exhaust gas collection chamber of the first bin body 2, and the other end is inserted into the heating chamber of the second bin body 3; on the contrary, one end of the second double-bin drainage pipe 9 is inserted into the exhaust gas collection chamber of the second bin body 3, and the other end is inserted into the heating chamber of the first bin body 2. In addition, valve bodies 10 are provided on both the first double-bin drainage pipe 7 and the second double-bin drainage pipe 9, and the valve body 10 can be a pneumatic butterfly valve.

[0026] The present application designs two double-bin drainage pipes to meet the single-bin heating situation. Specifically, for single-bin heating, the double-bin drainage pipe can lead the high-temperature exhaust gas extracted from the hot bin to the heating chamber of the cold bin, and then the exhaust gas crawls through the bottom and inner wall of the cold bin to the exhaust gas collection chamber of the cold bin and is discharged from the exhaust pipe 8. This makes full use of thermal energy, reduces losses, improves utilization efficiency, and reduces cost output, thereby raising the base temperature for reheating the cold bin.

[0027] The outer walls of both sides of the furnace body 1 are respectively formed with a gas pipeline 12 and an oxygen pipeline 13, which are connected to a heating gun inserted into the chamber. Specifically, the gas pipeline 12 and the oxygen pipeline 13 are in the form of a slotted sealing plate, which has a good cooling effect and is easy to process. The oxygen and fuel gas required for combustion crawl through the outer wall of the furnace body to the furnace top, respectively, and are ignited under the action of the ignition burner 14 after being passed into the heating gun, thereby heating the auxiliary materials. The cold oxygen and fuel gas can cool down the furnace body during the crawling process on the outer wall of the furnace body, and at the same time, the temperature of the furnace body can also heat the gas to improve the reaction efficiency.

[0028] The workflow of this application is as follows:

[0029] The auxiliary materials used for steelmaking enter the heating chamber through the feed pipe 5; oxygen is introduced into the oxygen pipeline 13, and gas is introduced into the gas pipeline 12 at the same time. The oxygen and gas are ignited by the ignition burner 14 to heat the materials in the furnace body. The waste gas generated by heating enters the waste gas recovery pipeline 16 from the bottom of the warehouse body, and finally enters the waste gas collection chamber, and is connected to the dust removal and discharged through the exhaust pipe 8. In this process, the waste gas generated by heating can heat the oxygen and gas in the oxygen pipeline 13 and the gas pipeline 12, and the oxygen and gas can cool the furnace body 1 at the same time.

[0030] When heating a single chamber, the exhaust gas generated by heating enters the heating chamber of the cold chamber through the double chamber drainage pipe, and then the exhaust gas enters the exhaust gas collecting chamber from the bottom of the cold chamber. In this process, the basic temperature for reheating the cold chamber can be increased.

[0031] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A double-bin heating furnace for steelmaking auxiliary materials, comprising a furnace body (1), characterized in that: The furnace body (1) is divided into two left and right chambers, and a double chamber drainage pipe and an exhaust pipe (8) are arranged between the two chambers; each chamber is provided with a partition (15), and the partition (15) divides the chamber into a heating chamber located at the bottom and an exhaust gas collection chamber located at the top; a gas pipeline (12) and an oxygen pipeline (13) are respectively formed on the outer walls of both sides of the furnace body (1), and the gas pipeline (12) and the oxygen pipeline (13) are connected to a heating gun inserted into the chamber.

2. A double-bin heating furnace for steelmaking auxiliary materials according to claim 1, characterized in that: A plurality of waste gas recovery pipelines (16) are formed on the inner wall of the furnace body (1), the lower end of the waste gas recovery pipeline (16) is located at the bottom of the warehouse body, and the upper end is located in the waste gas collection chamber.

3. A double-bin heating furnace for steelmaking auxiliary materials according to claim 1, characterized in that: Two double-bin drainage pipes are arranged between the two bin bodies, and a valve body (10) is arranged on the double-bin drainage pipes.

4. A double-bin heating furnace for steelmaking auxiliary materials according to claim 1, characterized in that: The exhaust pipe (8) is provided with a reversing valve (11).

5. A double-bin heating furnace for steelmaking auxiliary materials according to claim 1, characterized in that: Each bin of the furnace body (1) is connected to a feed pipe (5), and the remaining end of the feed pipe (5) is connected to a distributor (4).

6. A double-bin heating furnace for steelmaking auxiliary materials according to claim 1, characterized in that: A discharge valve (6) is provided at the bottom of each bin of the furnace body (1).

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