Anti-slag-leakage roller for steel slag treatment

Abstract

The utility model discloses a slag-leakage-proof roller for treating steel slag. The roller comprises a feeding hopper, a roller body and a transition section cylinder body positioned between the feeding hopper and the roller body, the lower edge of the outlet end of the feeding hopper extends into the inlet of the transition section cylinder; the fluid jet flow striking device comprises a plurality of nozzles which are arranged at the junction of the lower edge of the outlet end of the feeding hopper and the inlet end of the transition section cylinder body and are distributed along a gap at the junction of the lower edge of the outlet end of the feeding hopper and the inlet end of the transition section cylinder body, and outlets of the nozzles correspond to the gap; and the nozzles are respectively connected with a gas source through a gas pipeline. According to the utility model, the problem of slag leakage in the existing drum-method steel slag treatment process is thoroughly solved, so that the fifth-generation drum technology is continuously kept clean, and meanwhile, waste gas generated after combustion in a steel plant can be further utilized, so that the energy-saving and carbon-reducing targets of treating waste with waste and recycling media in procedures are achieved.

Description

Technical Field

[0001] The utility model relates to the treatment of steel metallurgical slag, in particular to a roller for steel slag treatment which is slag leakage-proof. Background Art

[0002] The drum slag treatment technology is constantly improving with the evolution of demand. In order to achieve the full treatment of all types of slag in steel plants, the fifth generation of drum technology has been developed, such as Figure 1 As shown. Compared with other roller process devices, the difference of the fifth-generation roller process device is that: there is a transition section cylinder 3 between the feed funnel 1 and the roller body 2, the transition section cylinder 3 and the roller body 2 are connected and rotate with the roller body 1; the feed funnel 1 is a fixed part, and the lower tail end extends into the transition section cylinder 3; the inclination angle formed between the feed funnel 1 and the horizontal plane is greater than the inclination angle formed between the roller transition section cylinder 3 and the horizontal plane, and the feed funnel 1 and the transition section cylinder 3 form an interface 100 with a slit at the connection point where the static part of the equipment is connected to the rotating part. It was found in engineering practice that slag particles were often found to pop out of the interface 100 where the lower end of the feed funnel 1 extends into the transition section cylinder 3, forming leaked slag 100, see Figure 2 .

[0003] Therefore, how to prevent slag leakage at this interface and ensure the cleanliness of the drum process becomes a problem that needs to be solved.

[0004] Since the fifth-generation roller technology is the first to use a transition section between the feed hopper and the main body section, there is no slag leakage at the joints of previous generations of rollers. Summary of the invention

[0005] The purpose of the utility model is to design a slag leakage-proof roller for steel slag treatment, which completely solves the slag leakage problem existing in the existing roller method for steel slag treatment technology, not only allowing the fifth-generation roller technology to continue to maintain its clean advantages, but also accelerating the roller slag treatment rate and better realizing slag-iron separation; it can also further utilize the post-combustion waste gas in the steel plant to achieve the energy-saving and carbon reduction goals of waste treatment and recycling of media within the process.

[0006] In order to achieve the above object, the technical solution of the utility model is:

[0007] A slag-proof steel slag treatment drum comprises a feed hopper, a drum body and a transition section drum body located between the feed hopper and the drum body; the lower edge of the feed hopper outlet end extends into the transition section drum body inlet; and further comprises:

[0008] The fluid jet striking device includes: a plurality of nozzles, which are arranged at the junction of the lower edge of the feed funnel outlet end and the inlet end of the transition section cylinder, and are distributed along the gap at the junction of the lower edge of the feed funnel outlet end and the inlet end of the transition section cylinder, and the nozzle outlet corresponds to the gap; the nozzles are connected to the gas source through gas pipelines respectively.

[0009] Preferably, the gas source is the wet tail gas discharged from the drum and purified, and is connected to the gas pipeline of the nozzle through a pipeline and a fan.

[0010] Preferably, the gas source is the exhaust gas after combustion of the furnace device in the steel plant, and is connected to the gas pipeline of the nozzle through a pipeline and a fan.

[0011] The reasons for the existing drum slag leakage are: the feed funnel and the transition section are coordinated dynamically and statically, the funnel is stationary, the transition section rotates, and there is an installation gap between the two; the inclination angles between the two are different, so the installation gap required at the connection interface, especially the lower part of the interface, will be larger; when the slag is falling, the sliding trajectory will have a sudden turn. At this time, according to the different slag properties, there are roughly two situations: when the slag is still in a sticky and soft molten state at the joint, the sudden turn will cause the soft and sticky slag to deform, and the temperature of the soft and sticky slag layer near the wall is low, and the black slag will undergo brittle fracture, and the fine slag particles generated by the fracture will fall onto the transition section, and then it is possible to jump out of the narrow gap and fall outside the drum; if the slag has been granulated in the feed funnel, then when it falls from the feed funnel to the transition section, it is easier for more fine slag to jump out of the interface gap, forming slag leakage.

[0012] The utility model adds a fluid jet striking device at the interface gap between the feed funnel and the transition section cylinder, which, through the impact of a fluid at a certain speed, can suppress and prevent the granular slag formed here from jumping out; further, a layer of fluid film can be formed on the inner wall of the transition section at the interface slit, reducing the friction resistance between the falling slag layer and the wall surface, so that the slag layer from the feed funnel to the transition section and the inner wall surface of the transition section form a good fluid buffer unloading force and lubrication effect, which helps the slag layer to enter the rotating transition section without stopping and be processed more smoothly, thereby improving the operating efficiency of the drum.

[0013] Furthermore, the utility model adopts the method of using a fan to lead the purified wet exhaust gas discharged from the drum back and enter the jet striking device at the slit. Firstly, moist air is formed to suppress the slag discharge from the falling slag layer at the slit. Secondly, a large amount of air in the moist air, plus the significant moisture, has a double cooling effect on the slag layer. Thirdly, the moisture in the moist air has a certain dissolving effect on the free calcium oxide in the slag layer, which makes the slag layer expand and loosen more, promotes the separation of slag and iron, and improves the operating efficiency of the drum.

[0014] Furthermore, the utility model selects the jet as the injection of the exhaust gas after combustion in the furnace device in the steel plant. Since the combustion exhaust gas contains both H2O and CO2, it not only plays a basic role in preventing slag from being discharged, but the combined effect of water vapor and carbon dioxide gas can also cause the free calcium oxide and tricalcium silicate and dicalcium silicate in the steel slag to undergo a certain carbonation reaction. The combustion exhaust gas is recycled and utilized in the process, which saves energy while reducing gas pollutant emissions and has some carbon reduction benefits, and at the same time shows multiple benefits of waste treatment, energy saving and consumption reduction, and green carbon reduction.

[0015] Beneficial effects of the utility model:

[0016] The utility model designs a fluid jet striking device and introduces different jet striking media to completely solve the slag leakage problem in the existing drum slag treatment process, which not only allows the fifth-generation drum technology to continue to maintain its cleanliness advantage, but also accelerates the drum slag treatment rate and better realizes slag and iron separation; it can also further utilize the post-combustion waste gas in the steel plant to achieve the energy-saving and carbon reduction goals of waste treatment and recycling of media within the process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an existing drum for steel slag processing;

[0018] Figure 2 It is a schematic diagram of the existing slag treatment roller dropping slag at the narrow gap between the feed funnel and the transition section cylinder;

[0019] Figure 3 It is a schematic diagram of the structure of an embodiment of the utility model;

[0020] Figure 4 It is a schematic diagram of the structure of the fluid jet striking device in the embodiment of the utility model. DETAILED DESCRIPTION

[0021] See also Figure 3 , Figure 4 The utility model of the slag treatment drum with slag leakage prevention comprises a feed hopper 1, a drum body 2 and a transition section drum body 3 located between the feed hopper 1 and the drum body 2; the lower edge of the outlet end of the feed hopper 1 extends into the inlet of the transition section drum body 3; it also comprises:

[0022] The fluid jet striking device 4 includes: a plurality of nozzles 41, which are arranged at the junction of the lower edge of the outlet end of the feed funnel 1 and the inlet end of the transition section cylinder 3, and are distributed along the gap 100 at the junction of the lower edge of the outlet end of the feed funnel 1 and the inlet end of the transition section cylinder 3, and the outlet of the nozzle 41 corresponds to the gap 100; the nozzles 41 are connected to the gas source through gas pipelines.

[0023] Preferably, the gas source is the humid exhaust gas discharged from the drum and purified, and is connected to the gas pipeline of the nozzle 41 through the pipeline and the fan 5.

[0024] Preferably, the gas source is the exhaust gas after combustion of the furnace device 6 in the steel plant, and is connected to the gas pipeline of the nozzle 41 through the pipeline and the fan 5.

[0025] In this embodiment, the wet air discharged from the drum system is sucked back into the air supply pipe of the nozzle 41 of the jet striking device, which not only prevents the slag particles and slag powder from overflowing, but also makes further use of the waste gas originally discharged (chimney 7), thereby achieving the purpose of energy saving and carbon reduction by treating waste with waste and recycling the medium within the process.

Claims

1. A slag-proof steel slag treatment drum, comprising a feed hopper, a drum body, and a transition section drum located between the feed hopper and the drum body; the lower edge of the feed hopper outlet end extends into the transition section drum inlet; characterized in that: Also includes: The fluid jet striking device includes: a plurality of nozzles, which are arranged at the junction of the lower edge of the feed funnel outlet end and the inlet end of the transition section cylinder, and are distributed along the gap at the junction of the lower edge of the feed funnel outlet end and the inlet end of the transition section cylinder, and the nozzle outlet corresponds to the gap; the nozzles are connected to the gas source through gas pipelines respectively.

2. The slag treatment drum for preventing slag leakage according to claim 1, characterized in that: The gas source is the wet tail gas discharged and purified from the drum, and is connected to the gas pipeline of the nozzle through a pipeline and a fan.

3. The slag treatment drum for preventing slag leakage according to claim 1, characterized in that: The gas source is the tail gas after combustion of the furnace device in the steel plant, and is connected to the gas pipeline of the nozzle through a pipeline and a fan.

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