Separation and detection device for steel slag aggregate in concrete

Abstract

The utility model discloses a device for separating and detecting steel slag aggregate in concrete, which comprises a high-frequency vibrating screen, a waste water tank, a conveyor and a magnetic separator, the conveyor is positioned between the high-frequency vibrating screen and the magnetic separator, the high-frequency vibrating screen is arranged on the waste water tank, the conveyor comprises a skirt baffle conveying belt and a spraying device, the skirt baffle conveying belt is arranged in the waste water tank, and the spraying device is arranged in the waste water tank. The spraying devices are arranged on the two sides of the skirt baffle conveying belt and arranged in the conveying direction of the skirt baffle conveying belt, the skirt baffle conveying belt comprises a horizontal section and an inclined section, a feeding port of the magnetic separator is located below the tail end of the inclined section, and a plurality of water permeable holes are formed in the skirt baffle conveying belt. A concrete mixture is separated into slurry and aggregate through the high-frequency vibrating screen, the obtained aggregate is conveyed into the magnetic separator through the conveyor, the aggregate is impacted by water flow sprayed out of the spraying device in the conveying process so as to disperse large aggregate, and steel slag and non-magnetic aggregate are separated through the magnetic separator.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete detection, in particular to a separation detection device for steel slag aggregate in concrete. Background Art

[0002] In the field of concrete production, the use of steel slag as aggregate has always been a controversial topic. Although the use of steel slag as aggregate is regarded as a way of resource recycling, its use in concrete has many potential hazards.

[0003] First, steel slag contains a large amount of free CaO, MgO and other alkaline oxides. When these substances react chemically with cement minerals in concrete, the adhesion of cement minerals may be reduced, thereby affecting the strength and durability of concrete. Secondly, steel slag usually has a large particle size. When added to concrete, the porosity inside the concrete will increase, resulting in a decrease in the stability of the concrete structure. This instability may make the concrete more prone to cracking, scattering or leakage when subjected to external forces, seriously affecting the quality and safety of the project.

[0004] In order to ensure the construction quality, it is necessary to sample and test the concrete before construction to check whether steel slag is mixed in the concrete aggregate. Since the chemical composition and physical properties of steel slag are similar to those of some natural aggregates, the existing detection methods can usually only detect the physical and chemical properties of concrete samples and infer whether steel slag is mixed in the concrete sample based on the test results. It is difficult to separate steel slag from concrete samples, so it is impossible to directly prove that steel slag is mixed in the concrete sample. Summary of the invention

[0005] The utility model aims to provide a separation and detection device for steel slag aggregate in concrete in view of the problems existing in the prior art.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A separation and detection device for steel slag aggregate in concrete comprises a high-frequency vibrating screen, a wastewater tank, a conveyor and a magnetic separator, wherein the conveyor is located between the high-frequency vibrating screen and the magnetic separator, the high-frequency vibrating screen is arranged on the wastewater tank, the conveyor comprises a skirt baffle conveyor belt and a spray device, the skirt baffle conveyor belt is arranged in the wastewater tank, the spray device is arranged on both sides of the skirt baffle conveyor belt, the spray device is arranged along the conveying direction of the skirt baffle conveyor belt, the skirt baffle conveyor belt comprises a horizontal section and an inclined section, the feed port of the magnetic separator is located below the end of the inclined section, and the skirt baffle conveyor belt is provided with a plurality of water permeable holes.

[0008] The utility model utilizes the high-frequency vibration screen to preliminarily screen the concrete mixture to be tested, separates slurry and aggregate, allows the slurry to flow into the wastewater tank, and then utilizes the conveyor to send the obtained aggregate into the magnetic separator. The aggregate will be impacted by the water flow sprayed by the spray device during the transportation process, so that the large aggregates bonded together are dispersed by the water flow. The skirt baffle conveyor belt can ensure that the aggregate falls from a high place into the feed port of the magnetic separator. The magnetic separator separates the magnetic aggregate from the non-magnetic aggregate. Since among the aggregates used in concrete production, usually only steel slag is a magnetic aggregate, the magnetic separator can separate the steel slag alone to prove that the concrete is mixed with steel slag, and can determine the actual content of steel slag in the concrete according to the quality of the concrete mixture and the steel slag.

[0009] Preferably, the magnetic separator includes a drum, a material trough and a driving motor, the drum is located between the feed port and the discharge port of the material trough, the drum is rotatably connected to the material trough, the drum is connected to the driving motor through a coupling, and the discharge port includes a magnetic discharge port and a non-magnetic discharge port distributed upper and lower.

[0010] Preferably, brackets are provided on both sides of the material trough, a rotating shaft is provided between the brackets, the rotating shaft passes through the roller, and the rotating shaft is rotatably connected to the brackets and the roller respectively, a fan-shaped magnetic system is provided on the rotating shaft, the fan-shaped magnetic system is arranged toward the magnetic discharge port, and the non-magnetic discharge port is lower than the fan-shaped magnetic system.

[0011] When the magnetic separator is working, the driving motor will drive the drum to rotate, and the sector-shaped magnetic system will not rotate with the drum. After the aggregate enters the feed port, the steel slag will be affected by the sector-shaped magnetic system and adsorbed on the drum and rotate with the drum. When the steel slag rotates to the area not covered by the sector-shaped magnetic system, the steel slag will be separated from the drum and flow into the magnetic discharge port because the distance between the steel slag and the sector-shaped magnetic system is far. The remaining non-magnetic aggregate will not be affected and will directly flow to the non-magnetic discharge port through the bottom of the drum.

[0012] Preferably, a material collecting rack is further provided on one side of the magnetic separator, and the material collecting rack includes a first material collecting tray and a second material collecting tray, the magnetic material discharge port is arranged toward the first material collecting tray, and the non-magnetic material discharge port is arranged toward the second material collecting tray.

[0013] The first collecting plate is used to collect steel slag for weighing, and the non-magnetic discharge port is used to collect non-magnetic aggregate so as to recycle the non-magnetic aggregate.

[0014] Preferably, the skirt baffle conveyor belt comprises a belt, a side baffle and a partition, the side baffles and the partition are distributed on the belt, the side baffles are located on both sides of the belt, the partitions are located between the side baffles, and the partitions are spaced along the belt, and the water permeable holes are provided on the partitions and the belt.

[0015] When the skirt baffle conveyor belt is working, the side baffles can prevent aggregates from falling off the skirt baffle conveyor belt, the partition can drive the aggregates to move upward, and the water permeable holes facilitate water to flow into the wastewater tank, so as to facilitate centralized disposal of waste liquid.

[0016] Preferably, the spraying device includes a water pipe and a high-pressure nozzle, the water pipe is arranged on the side wall of the wastewater tank, the high-pressure nozzle is arranged on the water pipe, the high-pressure nozzle is arranged at intervals along the water pipe, and the high-pressure nozzle is arranged toward the skirt baffle conveyor belt.

[0017] The high-pressure nozzle uses water flow to impact the aggregate from both sides, so that the large pieces of aggregate stuck together are dispersed by the water flow, and at the same time plays a role in cleaning the residual slurry on the aggregate, preventing the aggregate from sticking together after entering the magnetic separator, causing the steel slag to leave the magnetic separator together with the remaining non-magnetic aggregate.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] The utility model utilizes a high-frequency vibrating screen to preliminarily screen the concrete mixture to be tested, separates slurry and aggregate, allows the slurry to flow into a wastewater tank, and then uses a conveyor to send the obtained aggregate to a magnetic separator. The aggregate will be impacted by the water flow sprayed by the spray device during the transportation process, so that large aggregates bonded together are washed away by the water flow. The skirt baffle conveyor belt can ensure that the aggregate falls from a high place into the feed port of the magnetic separator. The magnetic separator separates the magnetic aggregate from the non-magnetic aggregate. Since among the aggregates used in concrete production, usually only steel slag is a magnetic aggregate, the magnetic separator can separate the steel slag alone to prove that the concrete is mixed with steel slag, and can determine the actual content of the steel slag in the concrete according to the quality of the concrete mixture and the steel slag. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0021] Figure 2 This is a structural cutaway diagram of a magnetic separator in an embodiment of the utility model;

[0022] In the figure: 1. high-frequency vibrating screen; 2. wastewater tank; 3. conveyor; 301. spray device; 302. skirt baffle conveyor belt; 303. side baffle; 304. partition; 4. magnetic separator; 5. drum; 501. fan-shaped magnetic system; 502. rotating shaft; 6. material trough; 601. feed port; 602. magnetic discharge port; 603. non-magnetic discharge port; 7. drive motor; 8. collection rack. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the utility model to clearly and completely describe the technical solution of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as "middle", "upper", "lower", "left", "right", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0025] like Figures 1-2 As shown, the specific scheme of the embodiment is as follows: a separation and detection device for steel slag aggregate in concrete, comprising a high-frequency vibrating screen 1, a wastewater tank 2, a conveyor 3 and a magnetic separator 4, the wastewater tank 2 comprises a horizontal tank and an inclined tank, the high-frequency vibrating screen 1 is arranged on the horizontal tank, and the mesh aperture of the high-frequency vibrating screen 1 is 2.35 mm, which facilitates the cement mortar to leak into the wastewater tank 2 while retaining the aggregate part with large particle size.

[0026] The conveyor 3 is located between the high-frequency vibrating screen 1 and the magnetic separator 4. The conveyor 3 includes a skirt baffle conveyor belt 302 and a spray device 301. The skirt baffle conveyor belt 302 includes a horizontal section and an inclined section. The horizontal section of the skirt baffle conveyor belt 302 is located in the horizontal groove, and the inclined section of the skirt baffle conveyor belt 302 is located in the inclined groove. The discharge end of the high-frequency vibrating screen 1 is located above the top of the horizontal section, and the feed port 601 of the magnetic separator 4 is located below the end of the inclined section.

[0027] The spray device 301 is arranged on both sides of the skirt baffle conveyor belt 302. The spray device 301 includes a water pipe and a high-pressure nozzle. The water pipe is arranged along the conveying direction of the skirt baffle conveyor belt 302. The water pipe is arranged on the side walls of the horizontal groove and the inclined groove through a support. The high-pressure nozzle is arranged on the water pipe. The high-pressure nozzle is arranged at intervals along the water pipe. The high-pressure nozzles on both sides of the skirt baffle conveyor belt 302 are staggered, and the high-pressure nozzles are arranged toward the skirt baffle conveyor belt 302.

[0028] The skirt baffle conveyor belt 302 includes a belt, side baffles 303 and partitions 304, which are distributed on the belt. The side baffles 303 are located on both sides of the belt, and the partitions 304 are located between the side baffles 303. The partitions 304 are spaced along the belt, and water permeable holes are provided on the partitions 304 and the belt.

[0029] The magnetic separator 4 includes a drum 5, a material trough 6 and a driving motor 7. The material trough 6 and the driving motor 7 are respectively arranged on the frame. The material trough 6 includes a feed box and a discharge box. The drum 5 is located between the feed box and the discharge box of the material trough 6. The feed port 601 of the feed box is arranged toward the upper skirt baffle conveyor belt 302. The discharge port of the discharge box includes a magnetic discharge port 602 and a non-magnetic discharge port 603 distributed upper and lower.

[0030] The bottom of the trough 6 is arc-shaped, and while connecting the feed box and the discharge box, it guides the aggregate to move toward the drum 5 so that the aggregate is closer to the sector-shaped magnetic system 501 in the drum 5.

[0031] A first bracket and a second bracket are provided on both sides of the material trough 6, and a rotating shaft 502 is provided between the first bracket and the second bracket. The rotating shaft 502 passes through the roller 5, and one side of the roller 5 is connected to the driving motor 7 through a coupling. The coupling is a hollow sleeve, and the coupling is provided on the first bracket. The coupling is rotatably connected to the first bracket, one end of the rotating shaft 502 is rotatably connected to the second bracket, and the other end is rotatably connected to the coupling through a bearing, so that the rotating shaft 502 is rotatably connected to the bracket and the roller 5 respectively, and the rotating shaft 502 and the roller 5 can rotate independently without affecting each other.

[0032] A sector-shaped magnetic system 501 is disposed on the rotating shaft 502 . The sector-shaped magnetic system 501 is disposed toward the magnetic discharge port 602 , and the non-magnetic discharge port 603 is lower than the sector-shaped magnetic system 501 .

[0033] The magnetic separator 4 is further provided with a collecting rack 8 on the side away from the conveyor 3. The collecting rack 8 includes a first collecting tray and a second collecting tray. The magnetic discharge port 602 is arranged toward the first collecting tray, and the non-magnetic discharge port 603 is arranged toward the second collecting tray.

[0034] The method of use of this embodiment is as follows: sampling is performed from the concrete mixture, and the obtained concrete sample is weighed and then put into the feed end of the high-frequency vibrating screen 1. After the concrete sample is screened by the high-frequency vibrating screen 1, the separated aggregate falls from the discharge end of the high-frequency vibrating screen 1 onto the skirt baffle conveyor belt 302, and the separated slurry flows into the wastewater tank 2.

[0035] The skirt baffle conveyor belt 302 conveys the aggregate from a low place to a high place so as to be put into the magnetic separator 4. During the conveying process, the spray device 301 uses water flow to impact the aggregate from both sides, so that the large pieces of aggregate stuck together are dispersed by the water flow, and at the same time plays a role in cleaning the residual slurry on the aggregate, so as to prevent the aggregate from still sticking together after entering the magnetic separator 4, causing the steel slag to leave the magnetic separator 4 together with the remaining non-magnetic aggregate.

[0036] The cleaned aggregate falls into the feed box of the magnetic separator 4 and rolls toward the discharge box. During this process, the drive motor 7 drives the drum 5 to rotate, and the sector magnetic system 501 does not rotate with the drum 5. The steel slag will be affected by the sector magnetic system 501 and adsorbed on the drum 5 and rotate with the drum 5. When the steel slag rotates to the area not covered by the sector magnetic system 501, the steel slag is far away from the sector magnetic system 501, so it will detach from the drum 5 and flow into the magnetic discharge port 602. The remaining non-magnetic aggregates will not be affected and will directly flow to the non-magnetic discharge port 603 from the bottom of the drum 5.

[0037] The slag finally falls into the first aggregate tray for weighing and comparing with the weight of the concrete sample to determine the content of the slag. The non-magnetic aggregate finally falls into the second aggregate tray for recycling.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A separation and detection device for steel slag aggregate in concrete, comprising a high-frequency vibrating screen, a wastewater tank, a conveyor and a magnetic separator, characterized in that: The conveyor is located between the high-frequency vibrating screen and the magnetic separator, the high-frequency vibrating screen is arranged on the wastewater tank, the conveyor includes a skirt baffle conveyor belt and a spray device, the skirt baffle conveyor belt is arranged in the wastewater tank, the spray device is arranged on both sides of the skirt baffle conveyor belt, the spray device is arranged along the conveying direction of the skirt baffle conveyor belt, the skirt baffle conveyor belt includes a horizontal section and an inclined section, the feed port of the magnetic separator is located below the end of the inclined section, and the skirt baffle conveyor belt is provided with a plurality of water permeable holes.

2. The separation and detection device for steel slag aggregate in concrete according to claim 1, characterized in that: The magnetic separator includes a drum, a material trough and a driving motor. The drum is located between a feeding port and a discharging port of the material trough. The drum is rotationally connected to the material trough. The drum is connected to the driving motor through a coupling. The discharging port includes a magnetic discharging port and a non-magnetic discharging port distributed at the top and bottom.

3. The separation and detection device for steel slag aggregate in concrete according to claim 2, characterized in that: Brackets are provided on both sides of the material trough, a rotating shaft is provided between the brackets, the rotating shaft passes through the roller, and the rotating shaft is rotatably connected to the brackets and the roller respectively. A fan-shaped magnetic system is provided on the rotating shaft, and the fan-shaped magnetic system is arranged toward the magnetic discharge port, and the non-magnetic discharge port is lower than the height of the fan-shaped magnetic system.

4. The separation and detection device for steel slag aggregate in concrete according to claim 2, characterized in that: A material collecting rack is also provided on one side of the magnetic separator, and the material collecting rack includes a first material collecting tray and a second material collecting tray. The magnetic material discharging port is arranged toward the first material collecting tray, and the non-magnetic material discharging port is arranged toward the second material collecting tray.

5. The separation and detection device for steel slag aggregate in concrete according to claim 1, characterized in that: The skirt baffle conveyor belt includes a belt, a side baffle and a partition. The side baffles and the partition are distributed on the belt. The side baffles are located on both sides of the belt. The partition is located between the side baffles. The partitions are spaced along the belt. The water permeable holes are provided on the partition and the belt.

6. The separation and detection device for steel slag aggregate in concrete according to claim 1, characterized in that: The spray device includes a water pipe and a high-pressure nozzle. The water pipe is arranged on the side wall of the wastewater tank. The high-pressure nozzle is arranged on the water pipe. The high-pressure nozzle is arranged at intervals along the water pipe and is arranged toward the skirt baffle conveyor belt.

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