Three-dimensional screening device for reducing humidity of steel slag

Abstract

The utility model discloses a three-dimensional screening device for reducing the humidity of steel slag, which comprises a screening box body, a vertically through blanking channel is arranged in the screening box body, a steel slag feed port is arranged at the top end of the screening box body, and a first-stage vibrating bar screen and a second-stage vibrating bar screen are arranged in the screening box body. According to the utility model, steel slag particles are subjected to three-dimensional grading screening through the plurality of vibrating bar screens, steel slag with various particle sizes enters the corresponding bins, and a tedious belt conveying link is not needed, so that the space occupied by steel slag production is reduced, the space utilization rate is improved, and the production cost of the steel slag is reduced; drying mechanisms are arranged at screening parts of the first-stage vibrating bar screen and the second-stage vibrating bar screen, and steel slag materials are in contact with hot metal bars under the action of high temperature during blanking, so that the purposes of quickly heating and reducing the humidity of the steel slag are achieved, attached steel slag powder and small particles fall off after being dried, the powder content of the steel slag particles is reduced, and the quality of the steel slag is improved. The product quality of the steel slag particles is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of steel slag treatment, in particular to a three-dimensional screening device for reducing the humidity of steel slag. Background Art

[0002] At present, the main sales target of the steel slag produced by steel mills is cement plants. With the release of "General Portland Cement" (GB 175-2023), waste materials containing harmful substances such as steel slag can no longer be used in cement production, resulting in great limitations in the sales and utilization of steel slag. Through means such as technological innovation, the use of steel slag as road engineering materials can improve the road performance of roads, and the demand for road engineering materials is large. Therefore, the use of steel slag as road engineering materials can achieve good development.

[0003] In the actual production process of steel slag, the steel slag is usually subjected to rod milling and magnetic separation after being watered. The grading device requires a belt transportation link, and the equipment occupies a large space with low space utilization rate. In addition, the watered steel slag makes it easy for steel slag powder and the like to adhere to the surface of large steel slag particles, resulting in low quality of 5-10mm steel slag and steel slag larger than 10mm used for road engineering materials, which cannot be applied to road engineering.

[0004] Therefore, it is necessary to develop a three-dimensional screening device for reducing the humidity of steel slag. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is to provide a three-dimensional screening device for reducing the humidity of steel slag in view of the above-mentioned deficiencies of the prior art. The steel slag particles are subjected to three-dimensional grading and screening by an inclined primary vibrating bar screen and a secondary vibrating bar screen. Steel slag of each particle size can directly and efficiently enter the corresponding silo. A drying mechanism is provided at the screening parts of the primary vibrating bar screen and the secondary vibrating bar screen. When the steel slag material is fed, it contacts the hot metal bar under the action of high temperature, realizing rapid heating up and achieving the purpose of reducing the humidity of steel slag, and solving the problems put forward in the background art.

[0006] To solve the above technical problems, the technical solution adopted by the utility model is:

[0007] A three-dimensional screening device for reducing the humidity of steel slag, including a screening box body. There is a feeding channel penetrating up and down inside the screening box body, and a steel slag feeding port is arranged at the top of the screening box body. A primary vibrating bar screen and a secondary vibrating bar screen are arranged inside the screening box body. A drying mechanism is arranged on the primary vibrating bar screen and the secondary vibrating bar screen, and the primary vibrating bar screen is located directly above the secondary vibrating bar screen. A receiving assembly is arranged at the bottom of the screening box body;

[0008] The first-stage vibrating bar screen and the second-stage vibrating bar screen are attached to the inner wall of the screening box body and are movably connected to the bar screen frame body. The first-stage vibrating bar screen and the second-stage vibrating bar screen are inclined, and the inclination directions of the first-stage vibrating bar screen and the second-stage vibrating bar screen are opposite. The first-stage vibrating bar screen and the second-stage vibrating bar screen are provided with strip-shaped screen holes, and vibrating motors are installed on both the first-stage vibrating bar screen and the second-stage vibrating bar screen. Cleaning openings are provided at the bottom positions of the two side walls of the screening box body corresponding to the first-stage vibrating bar screen and the second-stage vibrating bar screen, and automatic baffles are arranged outside the cleaning openings.

[0009] Preferably, both the first-stage vibrating bar screen and the second-stage vibrating bar screen include vibrating bar screen frame bodies, and a plurality of gravity sensors distributed in gradients are installed inside the vibrating bar screen frame bodies. A number of parallel metal bar strips are arranged between adjacent gravity sensors, and strip-shaped screen holes are formed between adjacent two metal bar strips. Grooves are provided on both the left and right sides of the vibrating bar screen frame body, and a number of distributed vibrating springs are installed at the groove positions of the vibrating bar screen frame body. The other ends of the vibrating springs are fixedly connected to the inner wall of the screening box body.

[0010] Preferably, the drying mechanism includes heating wires. The number of heating wires is set to be multiple, and all the heating wires are connected to an electric heater. A temperature sensor is installed on the inner side wall of the vibrating bar screen frame body for sensing the temperature at the first-stage vibrating bar screen and the second-stage vibrating bar screen.

[0011] Preferably, the metal bar strips are of a hollow structure, and a heating wire is inserted into each metal bar strip. The heating wires inside the metal bar strips are spirally attached to the inner walls of the metal bar strips.

[0012] Preferably, both the screening box body and the metal bar strips are made of wear-resistant steel.

[0013] Preferably, the width of the strip-shaped screen holes of the first-stage vibrating bar screen is greater than the width of the strip-shaped screen holes of the second-stage vibrating bar screen.

[0014] Preferably, the storage assembly includes a first steel slag bin, a second steel slag bin, and a third steel slag bin. The first steel slag bin is located directly below the screening box body and is communicated with the output end of the screening box body. The second steel slag bin and the third steel slag bin are arranged side by side on both sides of the first steel slag bin, and the second steel slag bin and the third steel slag bin respectively receive the materials intercepted by the second-stage vibrating bar screen and the first-stage vibrating bar screen.

[0015] Preferably, the automatic baffle includes a metal baffle and support arms. The metal baffle is movably connected to the screening box body through four support arms, and an electric push rod is hinged between the metal baffle and the screening box body.

[0016] Preferably, the support arms are hinge plates, and the metal baffle and the screening box body are hinged through the hinge plates to switch the cleaning opening between the open and closed states.

[0017] The three-dimensional screening device further includes a single-chip microcomputer. The input end and the output end of the single-chip microcomputer are electrically connected to an A / D converter and a D / A converter respectively. The temperature sensor and the gravity sensor are both electrically connected to the A / D converter. The vibration motor, the electric heater and the electric push rod are all electrically connected to the D / A converter.

[0018] The utility model has the following beneficial effects:

[0019] The steel slag particles are subjected to three-dimensional classification and screening by the first-stage vibrating bar screen and the second-stage vibrating bar screen arranged obliquely. The steel slag of each particle size can directly and efficiently enter the corresponding silo without going through the cumbersome belt transportation link. This not only reduces the space occupied by steel slag production and improves the space utilization rate, but also saves the cost for the construction and subsequent maintenance of the belt transportation system, reduces the production cost of steel slag. Moreover, the screening parts of the first-stage vibrating bar screen and the second-stage vibrating bar screen are provided with drying mechanisms. When the steel slag material is fed, it contacts the hot metal bar under the action of high temperature, realizing rapid heating up to reduce the humidity of the steel slag, so that the attached steel slag powder and small particles fall off after drying, reducing the powder content of the steel slag particles and improving the product quality of the steel slag particles.

[0020] The gravity sensor senses the weight of the material on the metal bar. When the material reaches the set value, the output end of the electric push rod retracts, pulling the metal baffle to flip, and is supported movably in cooperation with the support arm. The support arm slowly moves the metal baffle upward, switching the cleaning port from the closed state to the open state. Since the first-stage vibrating bar screen and the second-stage vibrating bar screen are obliquely placed, the accumulated steel slag in the screening box can automatically fall into the corresponding storage box, improving the quality of the steel slag particles and at the same time saving the labor cost for controlling the baffle. Description of the Drawings

[0021] Figure 1 It is the front view of the overall structure of the three-dimensional screening device provided by the utility model;

[0022] Figure 2 It is the distribution diagram of the first-stage vibrating bar screen and the second-stage vibrating bar screen of the three-dimensional screening device provided by the utility model;

[0023] Figure 3 It is the structural schematic diagram of the first-stage vibrating bar screen in the utility model;

[0024] Figure 4 It is the distribution structure diagram of the metal bar and the heating wire in the utility model;

[0025] Figure 5 It is the distribution structure diagram of the automatic baffle in the utility model;

[0026] Figure 6The control flow chart of the automatic control system provided by the present utility model.

[0027] Among them are:

[0028] Screening box body - 1; Steel slag feed inlet - 2; First - stage vibrating bar screen - 3; Second - stage vibrating bar screen - 4; Vibrating motor - 5; Cleaning port - 6; Automatic baffle - 7; Heating wire - 8; Electric heater - 9; Temperature sensor - 10; First steel slag bin - 11; Second steel slag bin - 12; Third steel slag bin - 13; Single - chip microcomputer - 14;

[0029] Vibrating bar screen frame body - 301; Gravity sensor - 302; Metal bar - 303; Vibrating spring - 304;

[0030] Metal baffle - 701; Support arm - 702; Electric push rod - 703. Specific implementation manner

[0031] The present utility model will be further described in detail below in conjunction with the accompanying drawings and specific preferred implementation manners.

[0032] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "left side", "right side", "upper part", "lower part", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. "First", "second", etc. do not represent the importance of the components, so it cannot be understood as a limitation to the present utility model. The specific dimensions adopted in this embodiment are only for illustrating the technical solution and do not limit the protection scope of the present utility model.

[0033] As Figure 1-6 shown, a three - dimensional screening device for reducing the humidity of steel slag includes a screening box body 1. There is a downward - through material channel inside the screening box body 1, and a steel slag feed inlet 2 is arranged at the top of the screening box body 1. A first - stage vibrating bar screen 3 and a second - stage vibrating bar screen 4 are arranged inside the screening box body 1. A drying mechanism is arranged on the first - stage vibrating bar screen 3 and the second - stage vibrating bar screen 4, and the first - stage vibrating bar screen 3 is located directly above the second - stage vibrating bar screen 4. A receiving assembly is arranged at the bottom of the screening box body 1;

[0034] The first-stage vibrating bar screen 3 and the second-stage vibrating bar screen 4 are attached to the inner wall of the screening box body 1 and are movably connected to the bar screen frame body. The first-stage vibrating bar screen 3 and the second-stage vibrating bar screen 4 are inclined, and the inclination directions of the first-stage vibrating bar screen 3 and the second-stage vibrating bar screen 4 are opposite. The first-stage vibrating bar screen 3 and the second-stage vibrating bar screen 4 are provided with strip-shaped screen holes, and vibrating motors 5 are installed on both the first-stage vibrating bar screen 3 and the second-stage vibrating bar screen 4. The vibrating motors 5 are installed at the uppermost position at the bottom ends of the first-stage vibrating bar screen 3 and the second-stage vibrating bar screen 4. Cleaning ports 6 are provided at the positions corresponding to the bottom ends of the first-stage vibrating bar screen 3 and the second-stage vibrating bar screen 4 on both side walls of the screening box body 1 for discharging the remaining materials after screening. An automatic baffle 7 is arranged outside the cleaning port 6 for blocking the cleaning port 6;

[0035] As a preferred embodiment of the screening mechanism in the present utility model:

[0036] Both the first-stage vibrating bar screen 3 and the second-stage vibrating bar screen 4 include a vibrating bar screen frame body 301, and a plurality of gravity sensors 302 distributed in gradients are installed inside the vibrating bar screen frame body 301. A number of parallel metal bar strips 303 are erected between adjacent gravity sensors 302. The space between two adjacent metal bar strips 303 forms a strip-shaped screen hole. Grooves are provided on both the left and right sides of the vibrating bar screen frame body 301, and a number of distributed vibrating springs 304 are installed at the groove positions of the vibrating bar screen frame body 301. The other ends of the vibrating springs 304 are fixedly connected to the inner wall of the screening box body 1, so that the vibrating bar screen frame body 301 can slide the materials to one side during vibration.

[0037] As a preferred embodiment of the drying mechanism in the present utility model:

[0038] The drying mechanism includes heating wires 8. The number of heating wires 8 is set to be multiple, and a plurality of heating wires 8 are all connected to an electric heater 9. A temperature sensor 10 is installed on the inner side wall of the vibrating bar screen frame body 301 for sensing the temperature at the first-stage vibrating bar screen 3 and the second-stage vibrating bar screen 4, and a constant temperature value is set, for example, to keep the temperature in the screening box body 1 stable at about 105 °C.

[0039] Specifically, the metal bar strips 303 are provided with a hollow structure, and a heating wire 8 is inserted into each metal bar strip 303. The heating wire 8 inside the metal bar strip 303 is spirally attached to the inner wall of the metal bar strip 303, which is convenient for the metal bar strip 303 to quickly heat up and the surface temperature thereof is relatively uniform.

[0040] Specifically, both the screening box body 1 and the metal bar strips 303 are made of wear-resistant steel to extend the service life of the device.

[0041] Specifically, the width of the strip-shaped sieve holes of the first-stage vibrating bar sieve 3 is greater than that of the second-stage vibrating bar sieve 4. For example, in this embodiment, the width of the strip-shaped sieve holes of the first-stage vibrating bar sieve 3 is 10 mm, and the width of the strip-shaped sieve holes of the second-stage vibrating bar sieve 4 is 5 mm.

[0042] Specifically, the storage assembly includes a first steel slag bin 11, a second steel slag bin 12, and a third steel slag bin 13. The first steel slag bin 11 is located directly below the screening box body 1, and the first steel slag bin 11 is communicated with the output end of the screening box body 1. The second steel slag bin 12 and the third steel slag bin 13 are arranged side by side on both sides of the first steel slag bin 11, and the second steel slag bin 12 and the third steel slag bin 13 respectively receive the materials intercepted by the second-stage vibrating bar sieve 4 and the first-stage vibrating bar sieve 3.

[0043] Specifically, the automatic baffle 7 includes a metal baffle 701 and a support arm 702. The metal baffle 701 is movably connected to the screening box body 1 through four support arms 702, and an electric push rod 703 is hinged between the metal baffle 701 and the screening box body 1. The two ends of the electric push rod 703 are respectively hinged to the metal baffle 701 and the screening box body 1. Specifically, the support arm 702 is set as a hinge plate, and the metal baffle 701 and the screening box body 1 are hinged through the hinge plate. The cleaning port 6 is switched between the open state and the closed state by adjusting the telescopic output end of the electric push rod 703.

[0044] The three-dimensional screening device further includes a single-chip microcomputer 14. The input end and the output end of the single-chip microcomputer 14 are respectively electrically connected with an A / D converter and a D / A converter. The temperature sensor 10 and the gravity sensor 302 are both electrically connected with the A / D converter. The vibration motor 5, the electric heater 9, and the electric push rod 703 are all electrically connected with the D / A converter.

[0045] When this device is in use, start the electric heater 9, conduct the heat to the metal bar 303 through the heating wire 8, cooperate with the temperature sensor 10 to sense the temperature at the primary vibrating grizzly 3 and the secondary vibrating grizzly 4, control the electric heater 9 to stop and increase the temperature in a timely manner, and stabilize the temperature in the screening box body 1 at about 105°C. At this time, the automatic baffle 7 closes the cleaning port 6, start multiple vibrating motors 5, transport the steel slag to the steel slag feed port 2 through the belt conveyor, and let it fall into the screening box body 1. The steel slag accumulates on the primary vibrating grizzly 3 with a spacing of 10 mm. The vibrating spring 304 starts to vibrate under the action of the vibrating motor 5. Among them, the steel slag particles and steel slag powder with a particle size less than 10 mm fall and accumulate on the secondary vibrating grizzly 4 with a spacing of 5 mm, and the rest continue to accumulate on the primary vibrating grizzly 3 with a spacing of 10 mm. The vibrating spring 304 continues to vibrate, and the steel slag powder with a particle size less than 5 mm falls and accumulates in the first steel slag bin 11. When the steel slag passes through the screening box body 1, it contacts the hot metal bar 303 under the action of high temperature, realizing rapid heating up and achieving the purpose of reducing the humidity of the steel slag; after a period of screening, when the gravity sensor 302 senses that the steel slag on the metal bar 303 exceeds the set safety weight, the output end of the electric push rod 703 retracts, pulling the metal baffle 701 to flip, and cooperating with the support arm 702 for movable support. The support arm 702 slowly moves the metal baffle 701 upward, switching the cleaning port 6 from the closed state to the open state. Since the primary vibrating grizzly 3 and the secondary vibrating grizzly 4 are inclined, the steel slag particles larger than 10 mm in the screening box body 1 roll down into the third steel slag bin 13 according to the slope, and the steel slag particles larger than 5 in the screening box body 1 roll down into the second steel slag bin 12 according to the slope. When the gravity sensor 302 senses that the weight of the steel slag on the metal bar 303 tends to 0, control the electric push rod 703 to slowly lower the metal baffle 701 until the cleaning port 6 is closed, and carry out the next round of screening work.

[0046] The above has described the embodiments of the present invention in detail in conjunction with the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, without departing from the principle and spirit of the present invention, various changes, modifications, substitutions, and variations made to these embodiments still fall within the protection scope of the present invention.

Claims

1. A three-dimensional screening device for reducing the humidity of steel slag, comprising a screening box body (1), an up-and-down through blanking channel is arranged inside the screening box body (1), and a steel slag feed port (2) is arranged at the top of the screening box body (1), and it is characterized in that: Inside the screening box body (1), a primary vibrating bar screen (3) and a secondary vibrating bar screen (4) are provided. A drying mechanism is arranged on the primary vibrating bar screen (3) and the secondary vibrating bar screen (4). The primary vibrating bar screen (3) is located directly above the secondary vibrating bar screen (4). A receiving assembly is arranged at the bottom of the screening box body (1). The primary vibrating bar screen (3) and the secondary vibrating bar screen (4) are attached to the inner wall of the screening box body (1) and are movably connected to the bar screen frame body. The primary vibrating bar screen (3) and the secondary vibrating bar screen (4) are inclined. The inclination directions of the primary vibrating bar screen (3) and the secondary vibrating bar screen (4) are opposite. The primary vibrating bar screen (3) and the secondary vibrating bar screen (4) have strip-shaped screen holes. Vibration motors (5) are installed on both the primary vibrating bar screen (3) and the secondary vibrating bar screen (4). Cleaning openings (6) are provided at the bottom ends of the primary vibrating bar screen (3) and the secondary vibrating bar screen (4) corresponding to both side walls of the screening box body (1). An automatic baffle (7) is arranged outside the cleaning openings (6).

2. The three-dimensional screening device for reducing the humidity of steel slag according to claim 1, wherein: Both the primary vibrating bar screen (3) and the secondary vibrating bar screen (4) include a vibrating bar screen frame body (301). A plurality of gravity sensors (302) distributed in a gradient manner are installed inside the vibrating bar screen frame body (301). A number of metal bar strips (303) distributed in parallel are arranged between adjacent gravity sensors (302). Strip-shaped screen holes are formed between adjacent two metal bar strips (303). Grooves are provided on both the left and right sides of the vibrating bar screen frame body (301). A number of distributed vibration springs (304) are installed at the groove positions of the vibrating bar screen frame body (301). The other ends of the vibration springs (304) are fixedly connected to the inner wall of the screening box body (1).

3. The three-dimensional screening device for reducing the humidity of steel slag according to claim 2, wherein: The drying mechanism includes heating wires (8). The number of heating wires (8) is set to be multiple. All the multiple heating wires (8) are connected to an electric heater (9). A temperature sensor (10) is installed on the inner side wall of the vibrating bar screen frame body (301) for sensing the temperature at the primary vibrating bar screen (3) and the secondary vibrating bar screen (4).

4. The three-dimensional screening device for reducing the humidity of steel slag according to claim 3, characterized in that: The metal bar strips (303) are of a hollow structure. A heating wire (8) is inserted into each metal bar strip (303). The heating wire (8) inside the metal bar strip (303) is spirally attached to the inner wall of the metal bar strip (303).

5. The three-dimensional screening device for reducing the humidity of steel slag according to claim 2, wherein: Both the screening box body (1) and the metal bar strips (303) are made of wear-resistant steel.

6. The three-dimensional screening device for reducing the humidity of steel slag according to claim 1, characterized in that: The width of the strip-shaped screen holes of the primary vibrating bar screen (3) is greater than the width of the strip-shaped screen holes of the secondary vibrating bar screen (4).

7. A three-dimensional screening device for reducing the moisture content of steel slag according to claim 1, characterized in that: The receiving assembly includes a first steel slag bin (11), a second steel slag bin (12), and a third steel slag bin (13). The first steel slag bin (11) is located directly below the screening box body (1). The first steel slag bin (11) is communicated with the output end of the screening box body (1). The second steel slag bin (12) and the third steel slag bin (13) are arranged side by side on both sides of the first steel slag bin (11). The second steel slag bin (12) and the third steel slag bin (13) respectively receive the materials intercepted by the secondary vibrating bar screen (4) and the primary vibrating bar screen (3).

8. The three-dimensional screening device for reducing the humidity of steel slag according to claim 3, characterized in that: The automatic baffle (7) includes a metal baffle (701) and support arms (702). The metal baffle (701) is movably connected to the screening box body (1) through four support arms (702), and an electric push rod (703) is hinged between the metal baffle (701) and the screening box body (1).

9. The three-dimensional screening device for reducing the humidity of steel slag according to claim 8, wherein: The support arms (702) are arranged as hinge plates, and the metal baffle (701) and the screening box body (1) are hinged through the hinge plates, so that the cleaning port (6) switches between the open and closed states.

10. A three-dimensional screening device for reducing the humidity of steel slag according to claim 8, characterized in that: It further includes a single-chip microcomputer (14). The input end and the output end of the single-chip microcomputer (14) are electrically connected to an A / D converter and a D / A converter respectively. The temperature sensor (10) and the gravity sensor (302) are both electrically connected to the A / D converter, and the vibration motor (5), the electric heater (9) and the electric push rod (703) are all electrically connected to the D / A converter.

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