CN211595704U - Steel slag recycling and smelting system - Google Patents

Abstract

The utility model discloses a steel slag recovery smelting system, which comprises a crushing device, a smelting device, a heat supplementing device, a pelletizing device and a tail gas treatment device; the smelting device comprises a smelting furnace, the smelting furnace comprises a closed furnace body, a heating module is arranged on the inner wall of the furnace body, a feeding hole is formed in the upper end of the smelting furnace, a discharging hole is formed in the bottom of the smelting furnace, an air inlet pipe is arranged on the side wall of the smelting furnace, an exhaust pipe is arranged at the top of the smelting furnace, and the distance between the air inlet pipe and the bottom of the furnace body accounts for 1/6-; the pelletizing device is connected with the feed inlet, the crushing device is connected with the pelletizing device, and the tail gas treatment device is connected with the air outlet pipe. The smelting system with the structure can effectively solve the problem of difficult recovery of the existing steel production waste.

Description

A kind of iron and steel slag recovery smelting system

technical field

The utility model relates to a smelting system, in particular to a steel slag recovery smelting system.

Background technique

A large amount of iron-containing waste is produced in the process of iron and steel production, and its composition is complex. In addition to containing a large amount of iron elements, it also contains considerable other various metal elements, as well as other inorganic non-metallic impurities. At present, the most common treatment method is to use it as an infrastructure fill material or as a landfill as solid waste. From the perspective of sustainable development, waste is a misplaced resource, which causes a lot of waste of resources for the landfill treatment of iron-containing waste, and at the same time, it also has an adverse impact on the environment. Especially when there are not many high-grade iron ore reserves available for mining at this stage, iron and steel smelting waste containing a certain amount of recoverable metal has high economic value. At present, there are still deficiencies in the technology of using iron and steel production waste as raw materials for smelting, including high production costs and low recovery rates, and a reasonable design of the smelting system is required.

Utility model content

Aiming at the above-mentioned prior art, the utility model provides a steel slag recovery and smelting system, so as to solve the problem of the difficulty of recovery of the existing steel production waste.

造球装置与进料口相连接，破碎装置与造球装置相连接，尾气处理装置与出气管相连接。In order to achieve the above-mentioned purpose, the technical scheme adopted by the present utility model is to provide a steel slag recovery and smelting system, including a crushing device, a smelting device, a heat supplement device, a pelletizing device and a tail gas treatment device; the smelting device includes a smelting furnace, a smelting The furnace includes a closed furnace body, the inner wall of the furnace is provided with a heating module, the upper end is provided with a feeding port, the bottom is provided with a discharging port, the side wall is provided with an air intake pipe, and the top is provided with an exhaust pipe, and the air intake pipe is provided with the bottom of the furnace body. The distance between them accounts for the entire height of the smelting furnace

The pelletizing device is connected with the feeding port, the crushing device is connected with the pelletizing device, and the tail gas treatment device is connected with the gas outlet pipe.

On the basis of the above technical solutions, the utility model can also be improved as follows.

Further, the crushing device includes a crusher and a vibrating screen, the vibrating screen is located below the crusher, a conveyor belt is arranged below the vibrating screen, and the vibrating screen and the pelletizing device are connected by the conveyor belt.

Further, the pelletizing device includes a bracket, a motor and a pelletizing disk, the motor is fixed on the top of the bracket, and the pelletizing disk is connected to the motor obliquely; a scraper and an atomizing water spray pipe are arranged on the disk surface of the pelletizing disk.

Further, the inclination angle of the pelletizing disc is 30°˜45°.

Further, the heat supplement device includes a burner and a blower, the burner is connected with the air intake pipe through a heat transfer pipe, and the blower communicates with the heat transfer pipe.

Further, the exhaust gas treatment device includes a cooling tower, a filter, an exhaust fan and a chimney connected in sequence, and the inlet of the cooling tower is connected with the exhaust pipe.

Further, an insulating layer is provided between the heating module and the outer wall of the furnace.

Further, the heating module is an electric heating wire or a gas heating tube.

The beneficial effects of the present utility model are:

1. The practical smelting system can handle the iron and steel waste with complex composition and low iron content, and use it as a smelting raw material. Through processes such as crushing, pelletizing, and smelting, the smelting and efficient recovery of iron are realized, and other volatile elements are recovered simultaneously. , The whole system has a high resource recovery rate and no harmful emissions.

2. The combined use of the crushing device and the pelletizing device in the smelting system of the present invention can pulverize the steel slag to a suitable particle size and make it into a spherical shape, which is more conducive to the precipitation of useful components in the slag and greatly improves the smelting efficiency.

3. The smelting device of the present invention is provided with a heat supplementing device, which can provide additional heat for the smelting device, so that the material in the smelting furnace can be smelted more thoroughly, and at the same time, the heat distribution in the smelting furnace can be more uniform, and the smelting can be further improved. efficiency.

4. The smelting system of the present invention is provided with a tail gas treatment device, which can purify the tail gas after smelting, and can effectively avoid environmental pollution.

Description of drawings

Fig. 1 is the connection relation schematic diagram of each component of the utility;

2 is a cross-sectional view of a smelting device;

Figure 3 is a front view of the crushing device;

Figure 4 is a left side view of the pelletizing device;

5 is a front view of the pelletizing device;

Fig. 6 is the connection schematic diagram of each component of the exhaust gas treatment device;

1. Crushing device; 11. Crusher; 12. Vibrating screen; 13. Conveyor belt; 2. Pelletizing device; 21. Bracket; 22. Motor; 23. Pelletizing disc; 3. Smelting device; body; 32, feed port; 33, air inlet pipe; 34, discharge port; 35, heating module; 36, air outlet pipe; 4, heat supplement device; 41, burner; 42, heat transfer pipe; 43, blower; 5 51, cooling tower; 52, filter; 53, exhaust fan; 54, chimney.

Detailed ways

The specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

可以通过进气管33向炉体31内补充热气，以更好地对物料进行冶炼；炉体31顶部设置有排气管36，物料冶炼产生的废气通过排气管36排除，经过废气处理装置5处理后直接排入大气。造球装置2与进料口32相连接，破碎装置1与造球装置2相连接。In the embodiment of the present invention, as shown in Figures 1 to 6, a steel slag recovery and smelting system is provided. The smelting system in the present invention includes a crushing device 1, a smelting device 2, a heat supplement device 3, a pelletizing device 2 and a Exhaust gas treatment device 5. As shown in FIG. 2, the smelting device 3 includes a smelting furnace. The smelting furnace includes a closed furnace body 31. The furnace body 31 is made of alloy steel. A heating module 35 is embedded in the inner wall of the furnace body 31. The heating module 35 is used for The materials in the furnace body 31 are heated and smelted; according to the usage scenario, electric heating, steam heating or gas heating can be selected to heat the materials. On the contrary, the heating module 35 can be electric heating wire, heating pipe or gas heating heating tube, etc. In addition, in order to reduce heat loss and avoid scalding to the operator at the same time, a thermal insulation layer is provided between the heat module 35 and the outer wall of the furnace body 31 . The upper end of the furnace body 31 is provided with a feeding port 32, and the material to be smelted enters the furnace body 31 through the feeding port 32; the bottom of the furnace body 31 is provided with a discharging port 34, and a discharging valve is provided at the discharging port. Open the discharge valve to release the smelted material; the side wall of the furnace body 31 is provided with an air intake pipe 33, and the distance between the air intake pipe 33 and the bottom of the furnace body 31 accounts for 30% of the height of the entire furnace body 31.

The furnace body 31 can be supplemented with hot air through the intake pipe 33 to better smelt the materials; an exhaust pipe 36 is provided on the top of the furnace body 31, and the exhaust gas generated by the material smelting is discharged through the exhaust pipe 36 and passes through the exhaust gas treatment device 5 Directly discharged into the atmosphere after treatment. The pelletizing device 2 is connected with the feeding port 32 , and the crushing device 1 is connected with the pelletizing device 2 .

As shown in FIG. 3 , the crushing device 1 includes a crusher 11 and a vibrating screen 12. The vibrating screen 12 is located below the outlet of the crusher 11. The vibrating screen 12 screens the steel slag crushed by the crusher 11, and the particle size reaches the required size. The slag powder falls on the conveyor belt 13 located under the vibrating screen 12, and the conveyor belt 13 transports the crushed slag to the pelletizing device 2 for pelletizing.

As shown in Figures 4 to 5, the ball making device 2 includes a bracket 21, a motor 22 and a ball making disc 23; the motor 22 is fixed on the top of the support 21, and the ball making disc 23 is circular and inclined at an inclination angle of 30° to 45° It is fixedly connected to the motor 22, and driven by the motor 22, the pelletizing disc 23 can rotate; The conveyor belt 13 sends the pulverized slag into the pelletizing disc 23, and the atomizing water spray pipe 25 sprays water while the pelletizing disc 23 rotates, and the slag powder is made into a spherical shape by rotating.

The spherical slag enters the smelting device 2 for smelting. During the smelting process, the material is heated by the heating module 35. In order to improve the smelting effect, heat can be added to the furnace body 31 to make the material more uniformly heated. In the present invention, the heat supplement is realized by the heat supplement device 4. As shown in FIG. 1, the heat supplement device 4 includes a burner 41 and a blower 43. The burner 41 is connected to the air inlet pipe 33 on the furnace body 31 through a heat transfer pipe 42. The blower 43 communicates with the heat transfer pipe 42 . The heat generated by the combustion of the burner 41 is sent into the furnace body 31 through the blower 43 and the heat transfer pipe 42 to supplement heat for the smelting of the materials in the furnace body 31 .

A large amount of waste gas will be generated during the material smelting process, and if it is directly discharged without treatment, it will cause air pollution. Based on this, the smelting system in the present invention is provided with an exhaust gas treatment device 5 . As shown in FIG. 6 , the exhaust gas treatment device 5 includes a cooling tower 51 , a filter 52 , an exhaust fan 53 and a chimney 54 connected in sequence, and the inlet of the cooling tower 51 is connected with the exhaust pipe 36 . The exhaust gas after material smelting enters the cooling tower 51 through the exhaust pipe 36 under the action of the exhaust fan 53, and enters the filter 52 after being fully cooled. , and finally discharged into the atmosphere through the chimney 54 .

Although the specific embodiments of the present invention have been described in detail with reference to the accompanying drawings, they should not be construed as limiting the protection scope of the present patent. Within the scope described in the claims, various modifications and variations that can be made by those skilled in the art without creative efforts still belong to the protection scope of this patent.

Claims (8)

1. A steel slag recovery smelting system, characterized in that: comprising a crushing device (1), a smelting device (3), a heat supplement device (4), a pelletizing device (2) and a tail gas treatment device (5); the described The smelting device (3) includes a smelting furnace, the smelting furnace includes a closed furnace body (31), a heating module (35) is provided on the inner wall of the furnace body (31), a feeding port (32) is provided at the upper end, and a bottom is provided with a heating module (35). There is a discharge port (34), an air inlet pipe (33) is arranged on the side wall, and an exhaust pipe (36) is arranged on the top, and the distance between the air inlet pipe (33) and the bottom of the furnace body (31) accounts for the whole furnace body. (31) 1/6 to 1/4 of the height; the pelletizing device (2) is connected to the feed port (32), and the crushing device (1) is connected to the pelletizing device (2) connected, the exhaust gas treatment device (5) is connected with the exhaust pipe (36). 2. The iron and steel slag recovery and smelting system according to claim 1, characterized in that: the crushing device (1) comprises a crusher (11) and a vibrating screen (12), and the vibrating screen (12) is located in the crushing Below the machine (11), a conveyor belt (13) is arranged below the vibrating screen (12), and the vibrating screen (12) is connected with the pelletizing device (2) through the conveyor belt (13). 3. The iron and steel slag recovery and smelting system according to claim 1, characterized in that: the pelletizing device (2) comprises a bracket (21), a motor (22) and a pelletizing disc (23), the motor (22) ) is fixed on the top of the bracket (21), and the pelletizing disc (23) is obliquely connected to the motor (22); the disc surface of the pelletizing disc (23) is provided with a scraper (24) and an atomizer Sprinkler hose (25). 4 . The iron and steel slag recovery and smelting system according to claim 3 , wherein the inclination angle of the pelletizing disc ( 23 ) is 30°˜45°. 5 . 5. The iron and steel slag recovery and smelting system according to claim 1, characterized in that: the heat supplement device (4) comprises a burner (41) and a blower (43), and the burner (41) passes through a heat transfer pipe (41). 42) is connected with the air intake pipe (33), and the blower (43) communicates with the heat transfer pipe (42). 6. The iron and steel slag recovery and smelting system according to claim 1, wherein the exhaust gas treatment device (5) comprises a cooling tower (51), a filter (52), an exhaust fan (53) and a chimney connected in sequence (54), the inlet of the cooling tower (51) is connected with the exhaust pipe (36). 7. The iron and steel slag recovery and smelting system according to claim 1, characterized in that: an insulating layer is provided between the heating module (35) and the outer wall of the furnace body (31). 8. The iron and steel slag recovery and smelting system according to claim 1 or 7, wherein the heating module (35) is an electric heating wire or a gas heating pipe.

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