Iron sludge treatment system and method, steel cleaning system

Abstract

The present application relates to a kind of iron mud processing system, including intermediate medium circulation mechanism and iron mud recovery mechanism, intermediate medium circulation mechanism includes the iron mud of several intermediate media capable of extracting the bottom of the container to be cleaned and sequentially linked medium conveying unit, medium transfer unit and medium reflux unit, medium conveying unit is communicated with the intermediate medium outlet of the container to be cleaned, and medium reflux unit is communicated with the intermediate medium inlet of the container to be cleaned;Iron mud recovery mechanism includes the washing unit arranged above medium transfer unit and the iron mud collection box arranged below medium transfer unit.In addition, it also relates to the steel cleaning system configured with the iron mud processing system and the iron mud processing method based on the iron mud processing system.The present application can realize the iron mud impurities in the container to be cleaned on line, reduce the downtime dredging time and frequency;Intermediate medium can be recycled, so the processing cost is very low.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of metallurgical production, and particularly relates to an iron mud treatment system, a steel cleaning system provided with the iron mud treatment system, and an iron mud treatment method based on the iron mud treatment system. BACKGROUND

[0002] After being rolled by a rolling mill, a strip coil often has heavy oil and iron mud and other sundries remaining thereon. These sundries must be subjected to alkali cleaning before the next process, and the oil and mud impurities after cleaning will inevitably fall into the bottom of the alkali tank with the lowest relative elevation. Since the production line is in continuous production, the tank bottom is not easy to clean in real time, and can only be cleaned during shutdown for maintenance, which leads to difficulty in cleaning the tank bottom due to excessive deposition of sludge, or excessive impurities in the sewage are sent to the next cycle during production, affecting the cleaning quality of the strip steel of the production line. SUMMARY

[0003] The present application relates to an iron mud treatment system, a steel cleaning system provided with the iron mud treatment system, and an iron mud treatment method based on the iron mud treatment system, which can at least solve some defects of the prior art.

[0004] The present application relates to an iron mud treatment system, which comprises an intermediate medium circulation mechanism and an iron mud recovery mechanism. The intermediate medium circulation mechanism comprises a plurality of intermediate media capable of extracting iron mud at the bottom of a container to be cleaned, and a medium conveying unit, a medium transfer unit and a medium return unit connected in sequence. The medium conveying unit is in communication with the intermediate medium outlet of the container to be cleaned, and the medium return unit is in communication with the intermediate medium inlet of the container to be cleaned. The iron mud recovery mechanism comprises a flushing unit arranged above the medium transfer unit and an iron mud collection box arranged below the medium transfer unit.

[0005] As one of the embodiments, the medium transfer unit adopts a chain conveying unit.

[0006] As one of the embodiments, the iron mud recovery mechanism further comprises a drainage unit arranged between the upper chain layer and the lower chain layer of the medium transfer unit. The top end inlet of the drainage unit is located directly below the flushing unit, and the bottom end outlet of the drainage unit is located directly above the iron mud collection box.

[0007] As one of the embodiments, a protective net is further arranged around the upper chain layer of the medium transfer unit, and the protective area of the protective net covers at least the flushing area of the upper chain layer.

[0008] As one of the embodiments, the intermediate media comprise medium steel balls for entraining iron mud.

[0009] As one of the embodiments, the iron sludge recovery mechanism further comprises a filter unit, and the iron sludge collecting tank is provided with a washing liquid recovery pipe connected to the filter unit, and a filtrate outlet pipe of the filter unit is connected to the container to be cleaned.

[0010] As one of the embodiments, the filter unit comprises an electromagnetic filter for removing ferromagnetic impurities in the washing liquid.

[0011] As one of the embodiments, the bottom of the container to be cleaned is provided with a slope, and the slope slopes from the intermediate medium inlet to the intermediate medium outlet.

[0012] The present application also relates to a steel cleaning system comprising a cleaning tank and a circulating tank, and the system is further provided with the above-mentioned iron sludge treatment system, and the circulating tank is correspondingly configured as the container to be cleaned.

[0013] The present application also relates to an iron sludge treatment method based on the above-mentioned iron sludge treatment system,

[0014] The method comprises the following steps:

[0015] The intermediate medium is fed into the container to be cleaned, and the intermediate medium with iron sludge is fed to the medium transfer unit by the medium conveying unit;

[0016] The intermediate medium on the medium transfer unit is washed by the washing unit, so that the iron sludge is separated from the intermediate medium;

[0017] The clean intermediate medium is fed to the medium return unit by the medium transfer unit, and the clean intermediate medium is fed into the container to be cleaned by the medium return unit, so as to complete the circulation of the intermediate medium.

[0018] The present application has at least the following beneficial effects:

[0019] The present application can realize online cleaning of the iron sludge impurities in the container by the intermediate medium, improve the operation stability and reliability of the related process / system, reduce the downtime and frequency of dredging, and the intermediate medium can be recycled, so that the treatment cost is very low; for the steel cleaning circulating tank in the metallurgical industry, the service life of the steel cleaning liquid can be effectively prolonged, and the cleaning quality of the steel can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without any creative effort.

[0021] Figure 1 Structure diagram of the iron sludge treatment system provided by the embodiment of the present application;

[0022] Figure 2 Structure diagram of the iron sludge treatment system provided by the embodiment of the present application; Figure 1 Structure diagram of the iron sludge treatment system provided by the embodiment of the present application;

[0023] Figure 3 Structure diagram of the iron sludge treatment system provided by the embodiment of the present application;

[0024] Figure 4 Structure diagram of the iron sludge treatment system provided by the embodiment of the present application;

[0025] Figure 5 Structure diagram of the iron sludge treatment system provided by the embodiment of the present application;

[0026] Figure 6 Structure diagram of the iron sludge treatment system provided by the embodiment of the present application. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0028] Embodiment one

[0029] As shown in Figure 1 and Figure 2 , the present application provides an iron sludge treatment system, which comprises an intermediate medium circulation mechanism and an iron sludge recovery mechanism. The intermediate medium circulation mechanism comprises a plurality of intermediate media 30 capable of extracting iron sludge at the bottom of a to-be-cleaned container 4 and a medium conveying unit 31, a medium transfer unit 32 and a medium return unit 33 connected in sequence. The medium conveying unit 31 is in communication with the intermediate medium outlet of the to-be-cleaned container 4, and the medium return unit 33 is in communication with the intermediate medium inlet of the to-be-cleaned container 4. The iron sludge recovery mechanism comprises a flushing unit arranged above the medium transfer unit 32 and an iron sludge collection tank 21 arranged below the medium transfer unit 32.

[0030] In one of the embodiments, the to-be-cleaned container 4 is a circulating tank used for circulating cleaning liquid in a strip steel cleaning process. When the cleaning liquid carrying oil sludge and other impurities flows back to the circulating tank, the oil sludge and other impurities are prone to deposit at the bottom of the tank.

[0031] In one of the embodiments, the intermediate medium 30 includes medium steel balls for entrapping the iron sludge, which can conveniently take out the iron sludge at the bottom of the container. For the iron sludge at the bottom of the container, they will be entrapped by the layered flowing steel balls and taken out of the container 4 to be cleaned by the medium conveying unit 31; wherein, when the surface of the medium steel ball is designed to have a certain roughness, the entrapping effect of the iron sludge can be improved, and in one of the embodiments, the surface roughness Ra of the medium steel ball is ≥0.8 μm, and it is further preferred to be controlled within Ra≤12 μm.

[0032] In one of the embodiments, as Figure 1 , the bottom of the container to be cleaned 4 is provided with a slope, which slopes from the intermediate medium inlet to the intermediate medium outlet, facilitating the flow of the intermediate medium 30 in the container. For example, the medium steel balls can run from the intermediate medium inlet to the intermediate medium outlet by gravity, and the medium steel balls at the high place can form a squeezing and driving effect on the medium steel balls at the low place and the iron sludge on the slope. Based on the circulating flow of the medium steel balls, the bottom of the container can always be in motion, which can reduce the phenomenon of iron sludge accumulation, thus saving the intervention of power equipment. At the same time, the design of the slope is also beneficial to the deposition of the iron sludge to the intermediate medium outlet, thus facilitating the taking out of the iron sludge by the intermediate medium 30.

[0033] In one of the embodiments, the medium conveying unit 31 adopts a screw pump or a screw conveyor, which can be arranged obliquely or horizontally according to the relative position relationship between the intermediate medium outlet and the medium transfer unit 32.

[0034] In one of the embodiments, as Figure 1 and Figure 2 , the medium transfer unit 32 adopts a chain conveying unit, for example, a chain plate conveyor or a drag chain conveyor. Correspondingly, the medium transfer unit 32 includes an upper chain layer 321 and a lower chain layer 322.

[0035] Among them, the chain plate gap of the chain conveying unit is smaller than the size of the intermediate medium 30, for example, smaller than the diameter of the medium steel ball.

[0036] Among them, the medium conveying unit 31 is connected with the upper chain layer 321, for example, the medium output port of the medium conveying unit 31 is located directly above the upper chain layer 321, which can convey the intermediate medium 30 to the upper chain layer 321; alternatively, a hopper is arranged above the upper chain layer 321, which can receive the intermediate medium 30 output by the medium conveying unit 31 and transfer it to the upper chain layer 321, which can avoid the situation that the intermediate medium 30 pops out of the upper chain layer 321 due to the too large falling distance.

[0037] The medium return unit 33 is arranged at the outlet side of the chain conveying unit. Optionally, the medium return unit 33 is a conveying roller bed for returning the cleaned intermediate medium 30 to the container 4 to be cleaned.

[0038] The flushing unit is used for flushing the intermediate medium 30 on the medium transfer unit 32, so as to separate the iron sludge from the intermediate medium 30. In one embodiment, the flushing unit includes a flushing pipe 51, and at least one set of spray structures is arranged at the bottom of the flushing pipe 51. When there are multiple sets of spray structures, the spray structures are arranged in sequence along the conveying direction of the intermediate medium 30. Each set of spray structures includes at least one nozzle. When there are multiple nozzles in the spray structure, the nozzles in the spray structure are preferably arranged in sequence along the width direction of the medium transfer unit 32. Figure 2

[0039] Further, the flushing unit further includes a flushing liquid supply pipe 52 connected with the flushing pipe 51 for supplying flushing liquid. Preferably, the surface water of the container 4 to be cleaned is used as the flushing liquid, and correspondingly, the flushing liquid supply pipe 52 is connected with the upper part of the container 4 to be cleaned. Figure 2

[0040] The flushing liquid can exit through both sides of the medium transfer unit 32, and / or the medium transfer unit 32 is a hollow conveying device, for example, can exit through the chain plate gap of the chain conveying unit. In one embodiment, the iron sludge recovery mechanism further includes a drainage unit 22 arranged between the upper chain layer 321 and the lower chain layer 322 of the medium transfer unit 32. The top inlet of the drainage unit 22 is located directly below the flushing unit, and the bottom outlet of the drainage unit 22 is located directly above the iron sludge collection box 21. Based on this design, the flushing liquid can be reliably drained into the iron sludge collection box 21, and the site environment is cleaner. At the same time, it avoids the pollution of the flushing water carrying the iron sludge to the lower chain layer 322, and correspondingly improves the working reliability of the medium transfer unit 32 and reduces the maintenance frequency. Figure 1 Figure 3 Preferably, the drainage unit 22 is in the shape of an inverted Y, forming one drainage inlet pipe and two drainage outlet pipes. On the one hand, the two drainage outlet pipes can ensure the drainage efficiency and effect of the flushing liquid, and on the other hand, they are also convenient for the arrangement of the lower chain layer 322, for example, the lower chain layer 322 is located between the two drainage outlet pipes.

[0041] Preferably, the drainage unit 22 is in the shape of an inverted Y, forming one drainage inlet pipe and two drainage outlet pipes. On the one hand, the two drainage outlet pipes can ensure the drainage efficiency and effect of the flushing liquid, and on the other hand, they are also convenient for the arrangement of the lower chain layer 322, for example, the lower chain layer 322 is located between the two drainage outlet pipes. Figure 1 Figure 3

[0042] The upper chain layer 321 can be arranged in the drainage inlet pipe, so as to better capture the intermediate medium 30 and iron sludge splashed by the high-pressure jet. ​​​​​

[0043] Preferably, as Figure 3 The above-mentioned drainage unit 22 is connected with the iron sludge collecting tank 21 to form an integrated structure, for example, for the above-mentioned inverted Y-shaped drainage unit 22, the outer frame 221 is integrally formed with the iron sludge collecting tank 21, and is configured as a top-closed tank, and an inverted V-shaped mud baffle 222 is arranged in the tank, and the inner frame of the drainage unit 22 is correspondingly configured.

[0044] In one embodiment, a protective net 23 is further arranged around the upper chain layer 321 of the medium transfer unit 32, and the protective area of the protective net 23 covers at least the flushing area of the upper chain layer 321. By arranging the protective net 23, the high-pressure jet flow can be prevented from spraying the intermediate medium 30 out of the medium transfer unit 32.

[0045] The protective net 23 can perform side protection, and optionally, the protective net 23 includes two side enclosing net plates 231, which are separately arranged on both sides of the conveying channel of the medium transfer unit 32. The side enclosing net plates 231 are preferably not movable with the medium transfer unit 32, and are mounted by means of a net plate support, and for the above-mentioned scheme provided with the drainage unit 22, the side enclosing net plates 231 can also be mounted on the outer frame 221 of the drainage unit 22.

[0046] The protective net 23 can also perform upper protection, and optionally, the protective net 23 includes a top net plate 232 arranged above the medium transfer unit 32. The top net plate 232 is preferably not movable with the medium transfer unit 32, and can be mounted by means of the mounting method of the side enclosing net plates 231.

[0047] Further optimization of the above-mentioned iron sludge treatment system, such as Figure 1 And Figure 2 The iron sludge recovery mechanism further includes a filter unit, and the iron sludge collecting tank 21 is provided with a flushing liquid recovery pipe connected to the filter unit.

[0048] Optionally, the filtrate generated by the filter unit can be reused as flushing liquid, for example, the filtrate outlet pipe of the filter unit is connected to a flushing liquid storage tank, and the above-mentioned flushing liquid supply pipe 52 is also connected to the flushing liquid storage tank. When the flushing liquid is the surface water of the container to be cleaned 4, the filtrate generated by the filter unit can be returned to the container to be cleaned 4, and correspondingly, the filtrate outlet pipe of the filter unit is connected to the container to be cleaned 4.

[0049] The iron sludge collecting tank 21 can control the direction of the flushing liquid by overflow, and the above-mentioned flushing liquid recovery pipe is connected at the overflow level of the iron sludge collecting tank 21. The heavier impurities are deposited at the bottom of the iron sludge collecting tank 21, which can be cleaned regularly or irregularly.

[0050] In one of the embodiments, the filtering unit comprises an electromagnetic filter 1 for removing ferromagnetic impurities in the flushing liquid, which can reliably adsorb and remove the suspended ferromagnetic impurities in the flushing liquid.

[0051] Embodiment two

[0052] The embodiment provides a steel cleaning system, which comprises a cleaning tank and a circulating tank, and is further provided with the ferrous sludge treatment system in the above embodiment one, and the circulating tank is correspondingly configured as the to-be-cleaned container 4.

[0053] The cleaning tank comprises, but is not limited to, an alkaline cleaning tank.

[0054] The cleaning tank and the circulating tank are connected through a cleaning liquid supply pipe and a cleaning liquid return pipe, and specifically, the cleaning liquid supply pipe is connected with the cleaning liquid outlet of the circulating tank and the cleaning liquid inlet of the cleaning tank respectively, and the cleaning liquid return pipe is connected with the cleaning liquid inlet of the circulating tank and the cleaning liquid outlet of the cleaning tank respectively.

[0055] Further, an electromagnetic filter is arranged on the cleaning liquid return pipe and / or the cleaning liquid supply pipe. Based on the scheme, the cleaning liquid can be filtered on line, the use time of the cleaning liquid is significantly prolonged, the cleaning quality of the steel is improved, and the frequency of shutdown maintenance is reduced.

[0056] Embodiment three

[0057] The embodiment provides a ferrous sludge treatment method, which is implemented based on the ferrous sludge treatment system in the above embodiment one,

[0058] The method comprises the following steps.

[0059] The intermediate medium 30 is sent into the to-be-cleaned container 4, and the intermediate medium 30 with the extracted ferrous sludge is sent to the medium transfer unit 32 through the medium conveying unit 31.

[0060] The intermediate medium 30 on the medium transfer unit 32 is flushed by the flushing unit, so that the ferrous sludge is separated from the intermediate medium 30.

[0061] The medium transfer unit 32 sends the flushed intermediate medium 30 to the medium return unit 33, and the clean intermediate medium 30 is sent into the to-be-cleaned container 4 through the medium return unit 33, so as to complete the circulation of the intermediate medium 30.

[0062] Further, when the ferrous sludge recovery mechanism further comprises a filtering unit, the flushing liquid in the ferrous sludge collecting box 21 is sent into the filtering unit for treatment, the ferromagnetic impurities in the flushing liquid are filtered and removed, and the filtrate generated by the filtering unit can be reused as the flushing liquid or returned to the to-be-cleaned container 4.

[0063] Embodiment four

[0064] The present embodiment provides an electromagnetic filter 1, which can be used in the above-mentioned embodiment one or embodiment two as the electromagnetic filter 1 therein.

[0065] As Figures 4-6 The electromagnetic filter 1 comprises a filter tank 11, a filter disc 12 and a impurity collector 13, the filter disc 12 comprises a ring-shaped support 121, a plurality of electromagnetic suction discs 122 and an electric control unit for controlling the power on / off of each electromagnetic suction disc 122, each electromagnetic suction disc 122 is installed on the ring-shaped support 121 and is distributed in a ring shape along the circumference of the ring-shaped support 121, the ring-shaped support 121 is provided with a rotation driving mechanism 15 for driving the rotation thereof; the ring-shaped support 121 is partially located in the filter tank 11, and the impurity collector 13 is arranged outside the filter tank 11 and comprises an impurity removal part for driving the impurities away from the electromagnetic suction disc 122.

[0066] In one of the embodiments, the above-mentioned ring-shaped support 121 comprises an inner ring support and an outer ring support, the inner ring support and the outer ring support are connected through a plurality of spokes, each spoke separates the annular area between the inner ring support and the outer ring support to form a plurality of suction disc installation positions, and each suction disc installation position is installed with an electromagnetic suction disc 122.

[0067] Optionally, the spokes are distributed along the radial direction of the ring-shaped support 121, and the above-mentioned inner ring support-spoke-outer ring support connection is formed in a hub shape.

[0068] The electromagnetic suction disc 122 is preferably detachably installed on the ring-shaped support 121, including but not limited to fixed by screws and the like.

[0069] The disc surface of the electromagnetic suction disc 122 is preferably coplanar with the corresponding side surface of the ring-shaped support 121, so as to facilitate the removal of impurities on the electromagnetic suction disc 122, and also to prevent the formation of some corners between the electromagnetic suction disc 122 and the ring-shaped support 121 to cause dirt accumulation.

[0070] Optionally, the above-mentioned ring-shaped support 121 is connected with the rotation driving mechanism 15 through a support rotating shaft 14, the rotation driving mechanism 15 drives the rotation of the support rotating shaft 14, thereby driving the rotation of the ring-shaped support 121 and the electromagnetic suction disc 122 on the ring-shaped support 121.

[0071] In one of the embodiments, the above-mentioned rotation driving mechanism 15 adopts the structure of motor + transmission assembly, and the transmission assembly can be in the form of chain wheel transmission, belt wheel transmission and the like; the motor is preferably a variable frequency motor, which can control the rotation speed of the ring-shaped support 121.

[0072] Preferably, the electric control unit comprises a plurality of electric control cables and an electric control module, the electric control cables are connected with the electromagnetic suction discs 122 one by one, and each of the electric control cables is electrically connected with the electric control module.

[0073] In one of the embodiments, the support shaft 14 is a hollow shaft, and each of the electric control cables is routed through the hollow cavity of the support shaft 14. In this way, the routing of the electric control cables is facilitated, and the safety and reliability are high. Preferably, a routing hole is formed on the annular support 121 (for example, the inner ring support) to facilitate the entry of the electric control cable into the support shaft 14, and a routing channel is also formed in the electromagnetic suction disc 122 to connect the electric control cable with the coil in the electromagnetic suction disc 122.

[0074] Preferably, the annular support 121 is detachably mounted on the support shaft 14. In one of the embodiments, the support shaft 14 is designed in sections, and the annular support 121 (generally, the inner ring support) is clamped between two shaft segments 141 of the support shaft 14. Optionally, a shaft shoulder is formed on the shaft segment 141, and the inner hole of the inner ring support has a stepped hole structure at both ends. The shaft neck portion of the end of the shaft segment 141 is inserted into the large-diameter hole segment in the corresponding side stepped hole structure, and the shaft shoulder portion of the shaft segment 141 abuts against the corresponding side end face of the inner ring support and is fixed by screws.

[0075] Further, when the shaft segment 141 and the inner ring support are assembled, the electromagnetic suction disc 122 can be further clamped therebetween. For example, the outer ring wall of the inner ring support has a stepped shaft structure, a clamping groove is formed between the shaft shoulder of one of the shaft segments 141 and the large-diameter wall of the stepped shaft type outer ring wall, and the corresponding end portion of the electromagnetic suction disc 122 is clamped in the clamping groove. In this way, the stability and reliability of the installation of the electromagnetic suction disc 122 are improved. Especially when the electric control cable needs to enter the electromagnetic suction disc 122 through the support shaft 14, the above structure can ensure the accurate alignment between the routing hole on the annular support 121 and the routing channel in the electromagnetic suction disc 122, thereby avoiding damage to the electric control cable and other faults.

[0076] In one of the embodiments, the electric control module comprises a central controller and a conductive slip ring, each of the electric control cables is connected with the rotor portion of the conductive slip ring, and the central controller is connected with the stator portion of the conductive slip ring. Preferably, the rotor portion of the conductive slip ring is mounted on the support shaft 14. Based on this structure, the reliable control of the power-on and power-off of each electromagnetic suction disc 122 can be ensured under the normal rotation of the electromagnetic suction disc 122.

[0077] The central controller includes but is not limited to a PLC controller.

[0078] When the annular support 121 drives each electromagnetic chuck 122 to rotate, some electromagnetic chucks 122 are immersed in the filter tank 11 from outside the filter tank 11, while some electromagnetic chucks 122 leave the filter tank 11 and swing upwards. For the electromagnetic chucks 122 that swing upwards, their surfaces are adsorbed with ferromagnetic impurities. The liquid that is carried away and the liquid in the adsorbed impurities can leave the electromagnetic chucks 122 under the action of gravity, thus achieving the effect of gravity dehydration. The impurities collected in the impurity collector 13 have a low water content, which not only facilitates the subsequent processing of impurities, but also reduces the loss of liquid in the filter tank 11.

[0079] In one embodiment, such as Figure 5 and Figure 6 The filter disc 12 also includes a water-retaining ring 123, which is coaxially mounted on the support shaft 14 and abuts against the disc surface of each electromagnetic chuck 122. An annular water-retaining edge protrudes from the outer ring wall of the water-retaining ring 123, and this annular water-retaining edge, together with each electromagnetic chuck 122, forms a water-retaining groove. By setting the water-retaining ring 123, the liquid can be effectively guided, preventing liquid from entering the support shaft 14 and other parts that could affect the normal operation of the electronic control unit.

[0080] Preferably, there are two water-blocking rings 123, which are arranged on both sides of the annular support 121.

[0081] Preferably, a sealing gasket can be sandwiched between the water-blocking ring 123 and the electromagnetic chuck 122 to improve the water-blocking effect.

[0082] At the impurity collection station, impurities can be scraped off the surface of the electromagnetic chuck 122, or the surface of the electromagnetic chuck 122 can be rinsed with high-pressure water or high-pressure air.

[0083] In one embodiment, such as Figure 5 and Figure 6 The impurity removal unit includes a scraper 131, the working end of which contacts the surface of an electromagnetic chuck 122 located at the impurity collection position; the impurity collector 13 also includes an impurity collection groove 132, which is connected to the lower part of the scraper 131. This method has low energy consumption and high reliability.

[0084] Generally, both sides of the electromagnetic chuck 122 can adsorb impurities. Therefore, it is preferable to provide a scraper 131 and an impurity collection groove 132 on both sides of the annular support 121 respectively. The distance between the working ends of the scraper 131 on both sides is preferably the same as the thickness of the electromagnetic chuck 122.

[0085] Preferably, such as Figure 5 and Figure 6The sludge scraping plate 131 is arranged obliquely, so that the scraped impurities can fall into the impurity collecting groove 132.

[0086] Optionally, the working end of the sludge scraping plate 131 is the top end, which is preferably parallel to the horizontal plane, i.e., the contact line between the sludge scraping plate 131 and the electromagnetic chuck 122 is parallel to the horizontal plane, which facilitates the arrangement of the sludge scraping plate 131, the impurity collecting groove 132, etc., and the collection of impurities.

[0087] Preferably, the sludge scraping plate 131 is in the form of a groove plate, and the length direction of the sludge scraping plate 131 is defined as the direction from the working end to the impurity collecting groove 132, and wing plates are respectively extended from the two transverse ends of the sludge scraping plate 131, which can better constrain and guide the scraped impurities.

[0088] As a preferred scheme of the embodiment, the filter disc 12 has a plurality of groups, and each annular support 121 is sequentially mounted on the same support shaft 14, and the support shaft 14 is connected with the rotary driving mechanism 15. Figure 5 and Figure 6 The plurality of groups of filter discs 12 can improve the filtering efficiency and effect.

[0089] As Figure 5 , the two adjacent filter discs 12 can share one impurity collecting groove 132.

[0090] Preferably, as Figure 5 and Figure 6 , a plurality of partitions are arranged in the filter groove 11, each partition separates the filter groove 11 into a plurality of liquid storage grooves 111, and preferably each liquid storage groove 111 is provided with a filter disc 12; wherein the number of filter discs 12 and liquid storage grooves 111 is preferably the same and one-to-one corresponding.

[0091] In one embodiment, upstream sewage can be simultaneously introduced into each liquid storage groove 111.

[0092] In another embodiment, the liquid storage grooves 111 are sequentially connected in series, and upstream sewage is first introduced into the first-stage liquid storage groove 111, and the sewage flows between the upstream and downstream liquid storage grooves 111 in the form of overflow, which can process the sewage in a flow line manner, realize continuous processing, and ensure the processing effect and efficiency. Figure 5 In the first-stage liquid storage groove 111, the filter disc 12 is preferably arranged close to the sewage inlet to capture the ferromagnetic impurities in the sewage as soon as possible, thereby improving the electromagnetic filtering effect; and in the last-stage liquid storage groove 111, the filter disc 12 is preferably arranged close to the filtrate outlet to improve the cleanliness of the discharged filtrate.

[0093] In particular, based on the above-mentioned segmented design of the support shaft 14, the installation and arrangement of each filter disc 12 can be facilitated; the number of filter discs 12 can be increased or decreased as needed, thus having very high flexibility; and the equipment maintenance can be facilitated, for example, the filter disc 12 at the corresponding liquid storage groove 111 can be disassembled, without affecting the filtration treatment in other liquid storage grooves 111.

[0094] The method for using the above-mentioned electromagnetic filter 1 includes:

[0095] By driving each electromagnetic suction disc 122 to rotate through the annular support 121, the electromagnetic suction disc 122 can cyclically move between the working position, the dehydration position, and the impurity removal position,

[0096] At the working position, the electromagnetic suction disc 122 is powered and at least partially immersed in the filter tank 11 to adsorb the ferromagnetic impurities in the filter tank 11;

[0097] At the dehydration position, the electromagnetic suction disc 122 remains powered;

[0098] At the impurity removal position, the electromagnetic suction disc 122 is powered off, the impurities are driven away from the electromagnetic suction disc 122 through the impurity removal part and collected.

[0099] The above-mentioned is only a preferred embodiment of the present application, and is not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An iron sludge treatment system, characterized in that: The system includes an intermediate medium circulation mechanism and an iron sludge recovery mechanism. The intermediate medium circulation mechanism includes several intermediate media capable of extracting iron sludge from the bottom of the container to be cleaned, and a medium conveying unit, a medium transfer unit, and a medium return unit connected in sequence. The medium conveying unit is connected to the intermediate medium outlet of the container to be cleaned, and the medium return unit is connected to the intermediate medium inlet of the container to be cleaned. The iron sludge recovery mechanism includes a flushing unit arranged above the medium transfer unit and an iron sludge collection box arranged below the medium transfer unit. The container to be cleaned is a circulation tank used for circulating the cleaning solution in the strip steel cleaning process; The intermediate medium includes steel balls used to encapsulate the iron sludge; The bottom of the container to be cleaned is provided with a ramp, which slopes from the intermediate medium inlet to the intermediate medium outlet.

2. The iron sludge treatment system as described in claim 1, characterized in that: The medium transfer unit adopts a chain conveyor unit.

3. The iron sludge treatment system as described in claim 2, characterized in that: The iron sludge recycling mechanism also includes a diversion unit, which is arranged between the upper and lower chain layers of the medium transfer unit. The top inlet of the diversion unit is located directly below the flushing unit, and the bottom outlet of the diversion unit is located directly above the iron sludge collection box.

4. The iron sludge treatment system as described in claim 2, characterized in that: A protective net is also arranged around the upper chain layer of the media transfer unit, and the protective area of ​​the protective net covers at least the rinsing area of ​​the upper chain layer.

5. The iron sludge treatment system as described in claim 1, characterized in that: The iron sludge recycling mechanism also includes a filtration unit. The iron sludge collection box is equipped with a flushing liquid recovery pipe connected to the filtration unit, and the filtrate outlet pipe of the filtration unit is connected to the container to be cleaned.

6. The iron sludge treatment system as described in claim 5, characterized in that: The filtration unit includes an electromagnetic filter for removing ferromagnetic impurities from the rinsing fluid.

7. A steel cleaning system, comprising a cleaning tank and a circulation tank, characterized in that: It is also equipped with an iron sludge treatment system according to any one of claims 1 to 6, wherein the circulation tank is correspondingly configured as the container to be cleaned.

8. A method for treating iron sludge, characterized in that, Implemented based on the iron sludge treatment system according to any one of claims 1 to 6, The method includes: The intermediate medium is fed into the container to be cleaned, and the intermediate medium containing the extracted iron sludge is sent to the medium transfer unit through the medium conveying unit. The intermediate medium on the medium transfer unit is flushed by the flushing unit to separate the iron sludge from the intermediate medium; The media transfer unit sends the cleaned intermediate media to the media return unit, which then sends the clean intermediate media into the container to be cleaned, completing the circulation of the intermediate media.

Images