Liquid steel slag treatment device

Abstract

The utility model relates to a liquid steel slag treatment device which is characterized by comprising a bearing platform, a steel slag tank, a lifting frame, a lifting unit, a main stirring mechanism, an auxiliary stirring mechanism, three reducing agent feeding pipelines and an electric control system. Compared with a conventional single-gun stirring method, the device has the advantages that firstly, the conveying time of a reducing agent can be theoretically shortened by two thirds due to three-pipe spraying, and secondly, the whole reaction is more uniform and quicker due to rotation and revolution stirring of the three guns, so that the conveyed reducing agent can quickly react with an iron element in the liquid steel slag, and the production efficiency is improved. Theoretically, compared with the conventional single-gun stirring reaction time, the reaction time is shortened by two thirds, the steel slag solidification risk is reduced, the secondary heating time is reduced, and the energy is saved.

Description

Technical Field

[0001] This utility model relates to the field of steel slag recycling and reuse technology, and in particular to a liquid steel slag treatment device. Background Technology

[0002] Steel slag is a solid byproduct generated during the steelmaking process in the iron and steel industry. As a smelting waste discharged from the steelmaking industry, steel slag, a solid waste generated by steel plants during industrial production, contains a relatively high amount of metals, and its accumulation and discharge can cause serious soil pollution. Steel slag not only occupies a large area of ​​land but also pollutes the soil and groundwater at the dumping sites. Due to environmental protection requirements, it is becoming increasingly difficult to find sites for steel slag disposal; its comprehensive utilization has become a major challenge for steel plants. Because of its massive production volume and the lack of effective comprehensive utilization methods, the comprehensive utilization rate of steel slag has remained low. Currently, it is mainly used as road material, backfill material, and raw material for cement and concrete.

[0003] The purpose of steel slag treatment is to effectively separate the iron from the slag and recover the iron. Currently, the mainstream treatment technology involves pouring the steel slag into a slag-cooling pit, flushing it with water, and then sending it to a designated location for crushing and magnetic separation. Because the iron in the steel slag is predominantly in the form of ferric oxide and ferrous oxide, which are non-magnetic, only about 5% of the iron is recovered. However, with advancements in technology, liquid steel slag can be reduced to regenerate iron. This involves directly adding a reducing agent to the liquid steel slag taken from the converter, fully utilizing the slag's own thermal energy for reduction. This process significantly improves the iron recovery rate. With the rise and widespread adoption of this technology, there is a need for steel slag iron extraction equipment that meets the requirements of this process. Based on this, we have developed a liquid steel slag treatment device. Summary of the Invention

[0004] The purpose of this invention is to provide a liquid steel slag treatment device. This device and method can ensure that the reducing agent is evenly distributed and stirred, thereby achieving high-efficiency slag-iron separation and improving the iron recovery rate.

[0005] This utility model is implemented as follows.

[0006] The liquid steel slag treatment device of this utility model is characterized in that it includes: a bearing platform, a steel slag tank, a lifting frame, a movable support platform, a lifting unit, a rotary jetting host, a main stirring mechanism, a secondary stirring mechanism, three reducing agent supply pipes and an electrical control system, wherein the steel slag tank is located below the bearing platform.

[0007] The aforementioned support platform consists of multiple support columns and a top support for the platform;

[0008] The lifting frame consists of four guide columns set on the top of the bearing platform and a lifting frame top seat; the four guide columns are parallel to each other and vertically fixed between the bearing platform top seat and the lifting frame top seat to form a lifting slide rail;

[0009] The movable support platform includes a double-layer quadrilateral frame consisting of an upper quadrilateral frame, a lower quadrilateral frame, and columns connecting the two frames, as well as double guide wheels respectively set at the four corners of the quadrilateral frame. The double guide wheels at the four corners of the double-layer quadrilateral frame are tactilely connected to the four guide columns. An upper support plate is provided on the upper frame, and a central shaft hole and side holes are opened on the upper support plate.

[0010] The lifting unit includes an electric winch, steel wire ropes, and four pulley blocks. The electric winch is fixedly installed on the upper part of the top seat of the lifting frame. There are four steel wire ropes, with the upper ends passing over the four pulley blocks and connected to the electric winch, and the lower ends connected to the upper support plate of the movable platform at four points, so that the electric winch drives the movable platform to slide up and down along the four guide columns of the lifting frame.

[0011] The main stirring mechanism includes a complete set of motor reducer, main stirring shaft and stirring head set at the lower part of the main stirring shaft. The complete set of motor and reducer is set on the upper part of the upper support plate of the movable support platform. The upper end of the main stirring shaft is connected to the output shaft of the motor and reducer through a coupling. The stirring head at the lower part of the main stirring shaft passes through the central shaft hole opened on the upper support plate and is inserted into the steel slag tank.

[0012] The auxiliary stirring mechanism includes a revolution support mechanism, two auxiliary stirring blades, and an auxiliary stirring blade drive motor connected to the auxiliary stirring blades.

[0013] The orbital support mechanism includes an orbital motor, an orbital gear ring, and an orbital frame. The orbital motor is fixed to the upper side of the upper support plate of the movable platform. The orbital frame consists of a square upper fixed plate, two rectangular lower fixed plates arranged parallel to each other below the square upper fixed plate, and four H-beams connecting the square upper fixed plate and the two rectangular lower fixed plates. The orbital frame is positioned between the upper support plate and the lower frame of the movable platform. The two rectangular lower fixed plates each have through holes A and B. The square upper fixed plate has a hole that intersects with the upper support plate of the movable platform. The shaft hole corresponding to the mandrel hole makes the center line of the upper support plate of the movable platform coincide with the center line of the square upper fixed plate. The revolution gear ring is set below the upper support plate. The lower part is fixedly connected to the square upper fixed plate by bolts and nuts, and the top is located below the upper support plate of the movable platform. The output shaft of the revolution motor passes through the upper support plate of the movable platform and meshes with the revolution gear ring through gears, thereby making the entire revolution frame revolve. The two auxiliary stirring paddle drive motors are respectively set on the upper part of the two rectangular lower fixed plates. The output shaft of the auxiliary stirring paddle drive motor passes through the through hole A of the square lower fixed plate and is connected to the upper end of the auxiliary stirring paddle through a coupling. The lower end of the auxiliary stirring paddle is inserted into the bottom of the steel slag tank to form a rotation.

[0014] The three reducing agent supply pipes consist of a central reducing agent main spray pipe and two side reducing agent supply pipes. The two side reducing agent supply pipes extend into the steel slag tank through the through hole B of the rectangular lower fixed plate.

[0015] Preferably, the outlet of the two side reducing agent supply pipes is a three-way pipe.

[0016] Preferably, the main stirring shaft of the main stirring mechanism is a hollow main stirring shaft, and the central reducing agent main spray pipe is set inside the hollow main stirring shaft. The upper end of the central reducing agent main spray pipe is connected to the reducing agent conveying pipe through a rotary joint, and the lower end is inserted into the steel slag tank together with the stirring head of the main stirring mechanism.

[0017] Advantages of this utility model:

[0018] This device is a key piece of equipment for the iron extraction process from liquid steel slag. Compared with the conventional single-gun stirring method, it has two advantages: first, the three-tube injection system theoretically reduces the reducing agent delivery time by two-thirds; second, the three-gun rotation and revolution stirring makes the entire reaction more uniform and faster, enabling the delivered reducing agent to react quickly with the iron elements in the liquid steel slag. Compared with the conventional single-gun stirring reaction time, it shortens the reaction time by two-thirds, reduces the risk of steel slag solidification, reduces secondary heating time, and saves energy.

[0019] Third, after the equipment is put into operation, the recovery rate of iron from steel slag can be increased from about 5% with the existing process to more than 15%, resulting in considerable economic benefits. Fourth, it reduces the amount of solid waste steel slag discharged, protects the environment, and reduces costs. Attached Figure Description

[0020] Figure 1 This is a side view of the present invention.

[0021] Figure 2 This is a perspective view of the present utility model;

[0022] Figure 3 This is a schematic diagram of the auxiliary stirring mechanism;

[0023] Figure 4 is a view from direction A in Figure 3;

[0024] Figure 5 is a schematic diagram of the three-dimensional structure of Figure 3;

[0025] Figure 6 Sectional view of the main stirring shaft. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings.

[0027] like Figure 1 - As shown in Figure 2, the liquid steel slag treatment device of this utility model is characterized by comprising: a bearing platform, a steel slag tank, a lifting frame, a movable support platform 3, a lifting unit, a jetting host, a main stirring mechanism, a secondary stirring mechanism, three reducing agent supply pipes, and an electrical control system. The steel slag tank is located below the bearing platform. The bearing platform is composed of multiple support columns 12 and a bearing platform top seat 11.

[0028] The lifting frame consists of four guide columns 21 set on the top of the bearing platform and a lifting frame top seat 22; the four guide columns 21 are parallel to each other and vertically fixed between the bearing platform top seat 11 and the lifting frame top seat 22 to form a lifting slide rail;

[0029] The movable support platform 3 includes a double-layer quadrilateral frame consisting of an upper quadrilateral frame 31, a lower quadrilateral frame 32, and a connecting vertical plate 33, as well as double guide wheels 34 respectively set at the four corners of the quadrilateral frame. The double guide wheels 34 at the four corners of the double-layer quadrilateral frame are tactilely connected to four guide columns 21. An upper support plate 35 is provided on the upper frame 31, and a central shaft hole and side holes are opened on the upper support plate 35.

[0030] The lifting unit includes an electric winch 41, a steel wire rope 43, and four pulley blocks 42. The electric winch 41 is fixedly installed on the upper part of the top seat 22 of the lifting frame. There are four steel wire ropes 43, with the upper ends passing over the four pulley blocks 42 and connected to the electric winch 41, and the lower ends connected to the upper support plate 35 of the movable platform at four points, so that the electric winch drives the movable platform to slide up and down along the four guide columns 21 of the lifting frame.

[0031] The main stirring mechanism includes a complete set of motor reducer 51 and main stirring shaft 52. The complete set of motor and reducer 51 is set on the upper part of the upper support plate 35 of the movable support platform. The upper end of the main stirring shaft 52 is connected to the output shaft of the motor and reducer 51 through a coupling. The stirring head of the lower part of the main stirring shaft passes through the central shaft hole opened on the upper support plate and is inserted into the steel slag tank 8. The lower end of the main stirring shaft passes through two central shaft holes and is inserted into the steel slag tank 8.

[0032] As shown in Figures 3-5, the auxiliary stirring mechanism 6 includes a revolution support mechanism, two auxiliary stirring blades, and an auxiliary stirring blade drive motor connected to the auxiliary stirring blades.

[0033] The orbital support mechanism includes an orbital motor 61, an orbital gear ring 62, and an orbital frame. The orbital motor 61 is fixed to the upper side of the upper support plate 35 of the movable platform. The orbital frame consists of a square upper fixed plate 631, two rectangular lower fixed plates 632 arranged parallel to each other below the square upper fixed plate, and four H-beams 633 connecting the square upper fixed plate 631 and the two rectangular lower fixed plates 632. The orbital frame is positioned between the upper support plate 35 and the lower frame on the movable platform. The two rectangular lower fixed plates 632 have through holes A and B, respectively. The square upper fixed plate 631 has a connection point with the upper support plate 35 of the movable platform. The shaft hole corresponding to the central shaft hole makes the center line of the upper support plate 35 of the movable platform coincide with the center line of the square upper fixed plate. The revolution gear ring 632 is set below the upper support plate 35. The lower part is fixedly connected to the square upper fixed plate 631 by bolts and nuts, and the top is located below the upper support plate 35 of the movable platform. The output shaft of the revolution motor 631 passes through the upper support plate 35 of the movable platform and meshes with the revolution gear ring through gears, thereby making the entire revolution frame revolve. The two auxiliary stirring paddle drive motors 635 are respectively set on the upper part of the two rectangular lower fixed plates 632. The output shaft of the auxiliary stirring paddle drive motor 635 passes through the through hole A of the square lower fixed plate 632 and is connected to the upper end of the auxiliary stirring paddle 636 through a coupling. The lower end of the auxiliary stirring paddle 636 is inserted into the bottom of the steel slag tank 8 to form a rotation.

[0034] The three reducing agent supply pipes consist of a central reducing agent main spray pipe 521 and two side reducing agent supply pipes 7. The two side reducing agent supply pipes 7 extend into the steel slag tank 8 through the through hole B of the rectangular lower fixed plate.

[0035] The outlet of the two side reducing agent supply pipes 7 described in this utility model is a three-way pipe, which allows for the addition of reducing agent at multiple points.

[0036] like Figure 6 As shown, the main stirring shaft of the main stirring mechanism of this utility model is a hollow main stirring shaft, and the central reducing agent main spray pipe 521 is set inside the hollow main stirring shaft. The upper end of the central reducing agent main spray pipe 521 is connected to the reducing agent conveying pipe through a rotary joint 522, and the lower end is inserted into the steel slag tank 8 together with the stirring head of the main stirring mechanism.

[0037] The working principle of this utility model is as follows:

[0038] Step A: First, lay a layer of anti-sticking agent on the bottom of the steel slag container 8.

[0039] Step B: Then, the converter slag is fed into the slag hopper 8, and the slag hopper 8 is moved to the bottom of the device. The lifting unit is started so that the stirring paddles of the main stirring mechanism and the auxiliary stirring mechanism are placed in the slag.

[0040] Step C: Simultaneously start the main stirring mechanism and the auxiliary stirring mechanism, as well as the main nozzle 521 and the two reducing agent supply pipes 7 inside the hollow main stirring shaft, to add reducing agent into the steel slag tank 8 from the center point and both sides respectively; the reducing agent in the two reducing agent supply pipes 7 flows into the surface of the liquid steel slag under the action of gravity through the internal pipes of the rotating auxiliary stirring paddle 636. The two reducing agent supply pipes 7 can both revolve around the main stirring shaft and rotate on their own axis through the drive motor of the auxiliary stirring paddle. Under the action of the revolving and rotating main stirring mechanism and the two auxiliary stirring mechanisms, the reducing agent and steel slag can be fully mixed in a short time to form a mixture; start the lifting unit to lift the main stirring mechanism and the auxiliary stirring mechanism. After the main stirring mechanism and the auxiliary stirring mechanism leave the steel slag tank, the steel slag tank truck moves the steel slag tank out;

[0041] Step D: Finally, cool the mixture obtained in step C to room temperature, then move the slag container to another storage area for discharge.

[0042] This invention utilizes a three-paddle three-dimensional moving agitator to fully mix the reducing agent with the steel slag. Furthermore, the entire agitator and spray assembly moves up and down under the action of the lifting unit, achieving uniform distribution of the reducing agent, thorough mixing, and improved iron recovery rate.

[0043] The reduction reaction in this device is an endothermic reaction, requiring the steel slag to be in a liquid state with sufficient temperature and a short reaction time. Compared with the conventional single-gun stirring method, the three-channel conveying and three-gun stirring method of this invention has two advantages: first, the three-tube spraying theoretically reduces the reducing agent delivery time by two-thirds; second, the three-gun rotation and revolution stirring make the entire reaction more uniform and faster, enabling the conveyed reducing agent to react quickly with the iron elements in the liquid steel slag. Theoretically, compared with the conventional single-gun stirring reaction time, the reaction time is shortened by two-thirds, reducing the risk of steel slag solidification, reducing secondary heating time, and saving energy.

Claims

1. A liquid steel slag treatment device, characterized by comprising: The utility model relates to a steel slag reduction device, including: Bearing platform, steel slag tank, lifting frame, mobile bearing platform, elevator unit, main stirring mechanism, vice stirring mechanism, three reducing agent supply pipelines and electric control system, the steel slag tank sets up under bearing platform, bearing platform is by a plurality of support column and bearing platform top seat constitutes, lifting frame is by setting four guide columns in bearing platform top seat upper portion and lifting frame top seat constitutes, four guide columns are mutually parallel vertical fixed between bearing platform top seat and lifting frame top seat and form lifting slide rail, The mobile bearing platform includes a double-layer quadrilateral frame composed of an upper-layer quadrilateral frame, a lower-layer quadrilateral frame, and a connecting column between the two frames, and double guide wheels arranged at four corners of the quadrilateral frame, the double guide wheels at the four corners of the double-layer quadrilateral frame are in rolling connection with the four guide columns, an upper support plate is arranged on the upper-layer frame, a central shaft hole and a side hole are formed in the upper support plate, The elevator unit includes an electric hoist, a steel wire rope, and four pulley blocks, the electric hoist is fixedly installed on the upper portion of the lifting frame top seat, the steel wire rope is four, the upper ends of the steel wire rope are wound around the four pulley blocks and connected with the electric hoist, the lower ends of the steel wire rope are connected with the upper support plate of the mobile bearing platform at four points, so that the electric hoist drives the mobile bearing platform to slide up and down along the four guide columns of the lifting frame, The main stirring mechanism includes a complete set of motor reducer, a main stirring shaft, and a stirring head arranged at the lower portion of the main stirring shaft, the complete set of motor and reducer is arranged on the upper portion of the upper support plate of the mobile bearing platform, the upper end of the main stirring shaft is connected with the output shaft of the motor and reducer through a shaft coupling, the stirring head at the lower portion of the main stirring shaft penetrates through the central shaft hole formed in the upper support plate and is inserted into the steel slag tank, The vice stirring mechanism includes a revolution support mechanism, two vice stirring paddles, and vice stirring paddle drive motors connected with the vice stirring paddles, The revolution support mechanism includes a revolution motor, a revolution gear ring, and a revolution frame, the revolution motor is fixed on the upper side of the upper support plate of the mobile bearing platform, the revolution frame is composed of a square upper fixed plate, two rectangular lower fixed plates arranged in parallel at the lower portion of the square upper fixed plate, and four H-shaped steels connecting the square upper fixed plate and the two rectangular lower fixed plates, the revolution frame is arranged between the upper support plate and the lower-layer frame of the mobile bearing platform, through holes A and B are respectively formed in the two rectangular lower fixed plates, an axle hole corresponding to the central shaft hole of the upper support plate of the mobile bearing platform is formed in the square upper fixed plate, so that the center line of the upper support plate of the mobile bearing platform coincides with the center line of the square upper fixed plate, the revolution gear ring is arranged below the upper support plate and is fixedly connected with the square upper fixed plate through a bolt and a nut at the lower portion and below the upper support plate of the mobile bearing platform, the output shaft of the revolution motor penetrates through the upper support plate of the mobile bearing platform and is engaged with the revolution gear ring through a gear, so that the whole revolution frame revolves, the two vice stirring paddle drive motors are arranged on the upper portions of the two rectangular lower fixed plates, the output shafts of the vice stirring paddle drive motors penetrate through the through holes A of the square lower fixed plates and are connected with the upper ends of the vice stirring paddles through shaft couplings, the lower ends of the vice stirring paddles are inserted into the bottom of the steel slag tank, so that the vice stirring paddles rotate around the central axis of the steel slag tank; The three reducing agent supply pipes are composed of a central reducing agent main nozzle and two side reducing agent supply pipes which respectively extend into the steel slag tank through the through holes B of the rectangular lower fixed plate.

2. The liquid steel slag treatment device according to claim 1, characterized by The discharge ports of the two side reducing agent supply pipes are three-way pipelines.

3. The liquid steel slag treatment device according to claim 1, characterized by The main stirring shaft of the main stirring mechanism is a hollow main stirring shaft, the central reducing agent main nozzle is arranged in the hollow main stirring shaft, the upper end of the central reducing agent main nozzle is connected with the reducing agent supply pipe through a rotary joint, and the lower end is inserted into the steel slag tank together with the stirring head of the main stirring mechanism.

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