Dry-method treatment equipment for stainless steel reducing slag

Abstract

The utility model relates to the technical field of stainless steel slag treatment, in particular to stainless steel reducing slag dry treatment equipment which comprises a crusher, a slag cooler, a membrane cooler, a screening device and a waste heat recovery furnace. A discharge port of the slag cooler is communicated with the membrane cooler through a conveyor, and the screening device is arranged on one side of the membrane cold-rolling mill. According to the utility model, the slag cooler and the membrane cooler are arranged to carry out two-stage cooling treatment on the stainless steel reducing slag, the waste heat recovery furnace is also arranged to treat high-temperature gas discharged by the slag cooler and the membrane cooler, and generated steam is introduced into a steam pipe network or a power plant, so that heat is recycled, and the resource utilization rate is high.

Description

Technical Field

[0001] The utility model relates to the technical field of stainless steel slag treatment, in particular to a dry treatment device for stainless steel reduction slag. Background Technique

[0002] Stainless steel reduction is an object generated in the stainless steel production process, and it is necessary to timely treat the stainless steel reduction slag.

[0003] At present, the treatment of stainless steel reduction slag is mainly divided into two methods. One is wet treatment, and the other is dry treatment. In the wet treatment process, the stainless steel reduction slag needs to be soaked and cooled, and then the stainless steel slag needs to be dried. The dry treatment avoids the processes of soaking and drying. Compared with the wet treatment, the dry treatment has fewer process steps and is more energy-saving, and the application of the dry treatment is more extensive.

[0004] Since the liquid temperature of the stainless steel reduction slag reaches 1100°C, the dry treatment equipment needs to cool it to below 100°C. When the existing dry treatment equipment cools the stainless steel reduction slag, it cannot recover the heat carried by the stainless steel reduction slag, and its resource utilization rate is low.

[0005] Therefore, a dry treatment device for stainless steel reduction slag is proposed. Content of the Utility Model

[0006] The purpose of the utility model is to provide a dry treatment device for stainless steel reduction slag, and by setting a waste heat recovery furnace to recover the heat of the gas, the problems raised in the above background technique are solved.

[0007] To achieve the above purpose, the utility model provides the following technical solutions:

[0008] A dry treatment device for stainless steel reduction slag includes a crusher, a slag cooler, a finned cooler, a screening device, and a waste heat recovery furnace. The crusher is connected to the feed inlet of the slag cooler through a conveyor, the discharge outlet of the slag cooler is connected to the finned cooler through a conveyor, and the screening device is arranged on one side of the finned cold rolling machine.

[0009] Preferably, a rotating drum is provided on the slag cooler, an air inlet and an air outlet are provided on the rotating drum, the air inlet is connected to a cold air device, and the air outlet is connected to the waste heat recovery furnace.

[0010] Preferably, an air outlet pipe is provided on the finned cooler, and an air outlet pipe is also provided on the waste heat recovery furnace. The air outlet pipe is connected to an external steam pipe network or power plant for supply.

[0011] Preferably, the screening device includes a frame, a screen mesh, and a vibration motor. The vibration motor is arranged on the frame. Four installation grooves are formed on the frame. Four installation ears are provided on the side wall of the screen mesh and are movably installed on the installation grooves through the installation ears.

[0012] Preferably, a plurality of material lifting plates are arranged inside the rotary drum. A plurality of material lifting plates are fixedly installed inside the rotary drum. The plurality of material lifting plates are arranged in an annular array inside the rotary drum. Each material lifting plate is provided with rectangular teeth.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. The dry treatment equipment is provided with a slag cooler and a membrane cooler to perform two-stage cooling treatment on stainless steel reduction slag. A waste heat recovery furnace is also provided to treat the high-temperature gas discharged from the slag cooler and the membrane cooler, and the generated steam is introduced into the steam pipe network or power plant, so that the heat is recycled, and the resource utilization rate is high.

[0015] 2. A material lifting plate is arranged inside the slag cooler, and rectangular teeth are also provided on the material lifting plate. Driven by the rotary drum, the stainless steel reduction slag is lifted to a certain height and then falls onto the rectangular teeth of the material lifting plate, performing secondary crushing on the stainless steel reduction slag, which is beneficial to the subsequent process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall connection structure of the present utility model;

[0017] Figure 2 is a schematic diagram of the structure of the screening device of the present utility model;

[0018] Figure 3 is Figure 2 a schematic diagram of the structure at A in

[0019] Figure 4 is a cross-sectional view of the internal structure of the rotary drum.

[0020] In the figure: 1. Crusher; 2. Slag cooler; 3. Waste heat recovery furnace; 4. Membrane cooler; 5. Screen mesh; 6. Vibration motor; 7. Conveyor; 8. Air inlet; 9. Discharge port; 10. Feed port; 11. Frame; 12. Installation groove; 13. Installation ear; 14. Rotary drum; 15. Material lifting plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] Please refer to Figures 1 to 4 , the present invention provides a dry treatment device for stainless steel reduction slag, and the technical solution is as follows:

[0023] A dry treatment device for stainless steel reduction slag includes a crusher 1, a slag cooler 2, a finned cooler 4, a screening device, and a waste heat recovery furnace 3. The crusher 1 is connected to the feed inlet 10 of the slag cooler 2 through a conveyor 7. The discharge outlet 9 of the slag cooler 2 is connected to the finned cooler 4 through a conveyor 7. The screening device is arranged on one side of the finned cold rolling mill.

[0024] The slag cooler 2 is provided with a rotary drum 14. The rotary drum 14 is provided with an air inlet 8 and an air outlet 16. The air inlet 8 is connected to a cold air device, and the air outlet 16 is connected to the waste heat recovery furnace 3.

[0025] The crusher 1 is a roll crusher 1. The conveyor 7 is made of a high-temperature resistant conveyor 7, or it can be other high-temperature resistant conveying devices.

[0026] The slag cooler 2 is provided with a rotary drum 14. The feed inlet 10 and the discharge outlet 9 are both connected to the rotary drum 14. The rotary drum 14 is provided with an air inlet 8 and an air outlet 16. The air inlet 8 is connected to a cold air device, and the air outlet 16 is connected to the waste heat recovery furnace 3. After being crushed by the crusher 1, the stainless steel reduction slag is transported to the feed inlet 10 of the slag cooler 2 through the conveyor 7. At this time, the control system of the slag cooler 2 controls the rotation of the rotary drum 14 and also controls the cold air device to convey cold air into the rotary drum 14. After heat exchange in the rotary drum 14, the high-temperature gas flows into the waste heat recovery furnace 3, and the waste heat recovery furnace 3 recovers the heat.

[0027] A plurality of material lifting plates 15 are arranged inside the rotary drum 14. A plurality of material lifting plates 15 are fixedly installed inside the rotary drum 14. The plurality of material lifting plates 15 are arranged in an annular array along the inside of the rotary drum 14. Each material lifting plate 15 is provided with rectangular teeth.

[0028] After the stainless steel reducing slag enters the inside of the rotary drum 14, it is continuously lifted to a certain height under the drive of the material lifting plate 15 and then falls. When the steel slag hits the toothed material lifting plate 15 during the falling process, it plays a crushing role. During this entire process, the steel slag does not directly slide relative to the cooling cylinder, avoiding abrasion to the rotary drum 14. This setting enables the stainless steel reducing slag to be further crushed, with a higher crushing rate, which is more conducive to the subsequent processes.

[0029] The stainless steel reducing slag after being crushed and cooled by the slag cooler 2 is transported to the finned cooler 4 by the conveyor 7 and further cooled by the finned cooler 4. The finned cooler 4 is provided with an air outlet pipe, and the waste heat recovery furnace 3 is also provided with an air outlet pipe. The air outlet pipes are connected to an external steam pipe network or a power plant for supply.

[0030] By setting the air outlet pipe to be connected to the external steam pipe network, part of the gas flowing through the waste heat recovery furnace 3 follows the gas flowing out of the finned cooler 4 and flows together to the steam pipe network or the power plant, enabling further recovery and utilization of the heat of the gas.

[0031] The stainless steel reducing slag after being cooled by the finned cooler 4 enters a screening device for screening, as Figure 2 and Figure 3 shown. The screening device includes a frame 11, a screen 5, and a vibration motor 6. The vibration motor 6 is arranged on the frame 11. Four installation grooves 12 are formed on the frame 11. Four installation ears 13 are provided on the side wall of the screen 5, and the screen 5 is movably installed in the installation grooves 12 through the installation ears 13.

[0032] Since the screen 5 needs to be cleaned or a screen 5 with different mesh holes needs to be replaced during use, the provision of the installation grooves 12 and the installation ears 13 facilitates manual placement and replacement of the screen 5, with higher work efficiency.

[0033] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dry treatment device for stainless steel reduction slag, characterized in that: It includes a crusher (1), a slag cooler (2), a membrane cooler (4), a screening device, and a waste heat recovery furnace (3). The crusher (1) is connected to the feed inlet (10) of the slag cooler (2) through a conveyor (7). The discharge outlet (9) of the slag cooler (2) is connected to the membrane cooler (4) through a conveyor (7). The screening device is arranged on one side of the membrane cooler.

2. The dry treatment equipment for stainless steel reduction slag according to claim 1, wherein: A rotary drum (14) is provided on the slag cooler (2). An air inlet (8) and an air outlet (16) are provided on the rotary drum (14). The air inlet (8) is connected to a cold air device, and the air outlet (16) is connected to the waste heat recovery furnace (3).

3. The dry treatment equipment for stainless steel reduction slag according to claim 2, characterized in that: An air outlet pipe is provided on the membrane cooler (4), and an air outlet pipe is also provided on the waste heat recovery furnace (3). The air outlet pipes are connected to an external steam pipe network or power plant supply.

4. A dry treatment device for stainless steel reduction slag according to claim 1, characterized in that: The screening device includes a frame (11), a screen (5), and a vibration motor (6). The vibration motor (6) is arranged on the frame (11). Four mounting grooves (12) are formed on the frame (11). Four mounting ears (13) are provided on the side wall of the screen (5), and the screen (5) is movably mounted on the mounting grooves (12) through the mounting ears (13).

5. The dry treatment equipment for stainless steel reduction slag according to claim 2, characterized in that: A plurality of material lifting plates (15) are arranged inside the rotary drum (14). A plurality of material lifting plates (15) are fixedly installed inside the rotary drum (14). The plurality of material lifting plates (15) are arranged in an annular array inside the rotary drum (14). Each of the material lifting plates (15) is provided with rectangular teeth.

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