CN112978108B - Wet iron ore powder bin device capable of preventing arching and breaking arching and using method - Google Patents
Wet iron ore powder bin device capable of preventing arching and breaking arching and using method Download PDFInfo
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- CN112978108B CN112978108B CN202110456425.3A CN202110456425A CN112978108B CN 112978108 B CN112978108 B CN 112978108B CN 202110456425 A CN202110456425 A CN 202110456425A CN 112978108 B CN112978108 B CN 112978108B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D88/00—Large containers
- B65D88/54—Large containers characterised by means facilitating filling or emptying
- B65D88/64—Large containers characterised by means facilitating filling or emptying preventing bridge formation
- B65D88/66—Large containers characterised by means facilitating filling or emptying preventing bridge formation using vibrating or knocking devices
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Abstract
The invention relates to a wet iron ore powder bin device capable of preventing arching and arch breaking and a using method thereof, and the device comprises a bin straight cylinder body, a bin cone, a lining plate, a driving device, a drum hammer, a support, a drum membrane and a weighing belt scale, wherein the lower end of the bin straight cylinder body is connected with the upper end of the bin cone, and the lower end of the bin cone is a discharge hole; the bin cone is an asymmetric structure with inconsistent side conicity; the lining plates are fixed on the inner surfaces of the bin straight cylinder body and the bin cone; the bin cone and the lining plate inside the bin cone are provided with holes along the circumferential direction, the drum hammer is arranged in the holes, and the drum membrane is arranged at the holes on the inner side of the lining plate; the drum hammer is connected with a push rod of a driving device, the driving device is arranged on a support, and the support is fixed on a cone of the storage bin; the weighing belt scale is arranged below the discharge port; the device also comprises a computer, and the driving device and the weighing belt scale are electrically connected with the computer. The invention adopts anti-arching measures from three aspects, and can prevent and break the arch of the wet iron ore powder.
Description
Technical Field
The invention belongs to the technical field of metallurgy, and particularly relates to a wet iron ore powder bin device capable of preventing arching and breaking and a using method thereof.
Background
When the iron ore suspension magnetization roasting furnace is used for iron ore suspension magnetization roasting, the filter material conveyed by the front-stage process is stored in the storage bin and used as a buffer, and time is provided for the front-stage process to process faults when the normal operation of the iron ore suspension magnetization roasting furnace is not influenced. However, most of the existing storage bin faults are arching blockage, and the specific reasons, types, powder flowing forms, arching prevention and arch breaking measures of the storage bin arching are as follows:
the main reasons for arch camber of the stock bin are as follows: the material is stored for too long time, and the moisture is increased to cause the material to be caked; adhesion of the material to the bin wall; the structure of feed bin molding leads to the unable smooth circulation of material.
The types of arch camber of the storage bin mainly include: (1) the compressive arching is that the consolidation strength of the powder is increased under the action of pressure, so that the powder is arched; (2) the wedge-shaped arch is a material arch formed by mutually meshing particles to reach a force balance state; (3) the material arch is formed by the adhesion of the material with strong cohesiveness to the bin wall under the action of water.
The powder flow forms are mainly two types: one is integral flow, which means that all materials flow to a discharge opening during discharging, no dead zone exists, the material level uniformly drops, and the discharging flow is stable and uniform; the other is central flow, that is, at the beginning of discharging, only the material at the top of the bin is in motion, and the materials at the periphery slide and descend towards the center to form a central channel, so that only the material at the central part flows towards the discharging opening, and the part outside the flow area is a flow 'dead zone'.
And (3) arch prevention and arch breaking measures: the anti-arch aims to prevent arching, and aims to eliminate or weaken the compressive stress on the vertical plane of the arch line of the material, reduce the friction between the materials and between the material and the bin wall and improve the fluidity of the material. And the arch breaking is to break the already-formed arch from a mechanical angle by means of external force after the arch is formed.
The water content in the wet iron ore powder is more than 10 percent, the silicon content is more than 25 percent, the granularity is very fine, the main reasons of the arching are provided, the stock bin is blocked frequently, the feed balance of a suspension magnetization roasting furnace system is damaged due to the arching blockage of the stock bin, the stable operation of the suspension magnetization roasting furnace system is influenced, equipment is damaged and the furnace is stopped seriously, so that manual material poking is needed, the workload of operators is greatly increased, meanwhile, safety addiction is caused, and the traditional arching breaking mode has the defects of vibration of the bin wall, air cannon and the like but has poor effect of breaking the wet iron ore filter material powder. Therefore, an anti-arching and arch-breaking storage bin for wet iron ore powder is needed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a wet iron ore powder bin device capable of preventing arching and breaking arching and a using method thereof, aiming at preventing arching and breaking arching of wet iron ore powder.
A wet iron ore powder bin device capable of preventing arching and arch breaking comprises a bin straight cylinder body, a bin cone, a lining plate, a driving device, a drum hammer, a support, a drum membrane and a weighing belt scale, wherein the lower end of the bin straight cylinder body is connected with the upper end of the bin cone, and the lower end of the bin cone is a discharge hole; the bin cone is an asymmetric structure with inconsistent side taper; the lining plates are fixed on the inner surfaces of the bin straight cylinder body and the bin cone, and the connection mode of the lining plates and the inner surfaces of the bin straight cylinder body and the bin cone adopts glue adhesion, countersunk head screw fixation or the two modes of simultaneous use; the bin cone and the lining plate inside the bin cone are provided with holes along the circumferential direction, the drum hammer is arranged in the holes, the drum membrane is arranged at the holes on the inner side of the lining plate, the surface of the drum membrane is connected with the lining plate, the connection mode of the drum membrane and the lining plate adopts adhesive bonding, countersunk head screw fixation or the two modes of simultaneous use, and the drum hammer is contacted with materials through the drum membrane; the drum hammer is connected with a push rod of a driving device, the driving device is arranged on a support, and the support is fixed on a cone of the storage bin; the weighing belt scale is arranged below the discharge port and is not contacted with the lower edge of the discharge port;
the wet iron ore powder bin device capable of preventing arching and breaking arching further comprises a computer, a DCS system is arranged in the computer, and the driving device, the weighing belt scale and the computer are electrically connected.
The straight cylinder body of the storage bin is cylindrical.
The cross section of the discharge port is trapezoidal.
The number of the drum hammers is one or more according to the actual working condition, and one circumference or a plurality of circumferences are arranged at different heights on the cone of the storage bin.
One end of the drum hammer is an arc surface end, the other end of the drum hammer is a plane end, and the arc surface end faces the interior of the lining plate and is in contact with the tympanic membrane; the plane end is connected with a push rod of the driving device.
The lining plate is an oily nylon plate.
The tympanic membrane is silicone rubber.
The driving device is used for driving the drum hammer to move and is driven by hydraulic pressure, pneumatic pressure or electric power.
The use method of the wet iron ore fine material bin device capable of preventing arching and breaking arching comprises the following steps:
the method comprises the following steps: presetting a target discharge amount in a computer DCS system;
step two: the device is started, filter materials from a filter pressing workshop are continuously fed from the top of a straight cylinder body of a storage bin and continuously flow out from a discharge hole of a cone of the storage bin, and a weighing belt scale is used for weighing the flowing filter materials in real time and transmitting the weighed filter materials to a DCS (distributed control system) arranged in a computer;
step three: when the discharge amount displayed by the weighing belt scale is reduced after the storage bin is arched, when the discharge amount is less than 5% of the preset discharge amount, the DCS system sends an instruction to the driving device, the driving device works, a push rod of the driving device extends to push a drum hammer to move towards the inner direction of a conical body of the storage bin, and the drum hammer drives a drum membrane to push a filter material, so that the arch of the filter material collapses, the arch is broken, and the filter material smoothly enters a discharge port;
step four: when the forward displacement of the drum hammer reaches the maximum value, namely the push rod of the driving device moves to the maximum stroke, the DCS system sends a reverse movement instruction to the driving device, the push rod of the driving device retracts to the original position, and at the moment, the drum membrane restores to the original state due to the elastic action;
step five: and stopping working until the discharge amount fed back to the DCS by the weighing belt scale reaches a set range, otherwise, driving the drum hammer to continuously reciprocate by the driving device.
The invention has the beneficial effects that:
the invention adopts anti-arching measures from three aspects: (1) changing the inner wall material of the storage bin: the material of the inner wall of the storage bin can be changed to effectively prevent arching, because the smoother the material of the inner wall of the storage bin is, the smaller the friction force between the material and the storage bin is, so that the material and the storage bin can flow more easily, and arching can be inhibited to a certain extent; (2) improve feed bin appearance structure: the stock bin can be made into a cylinder, a square and a rectangle in shape, the unloading capacities of the stock bins with different shapes are different under the condition of the same unloading sectional area, but the square stock bin is easy to form a dead angle at the joint, and the round stock bin has no defect, so that the rectangular stock bin with the largest unloading capacity of the round stock bin and the next time of the square stock bin is the smallest; (3) improvement of the discharge opening: on the premise of meeting the requirements of design process and processing process, the inclination angle of the hopper is as large as possible, the size of the discharge port is also properly increased, and in addition, the rectangular discharge port is less prone to arching than a circular outlet, so that the trapezoidal discharge port is arranged in the feeding device.
When the iron ore powder is subjected to suspension magnetization roasting, the storage bin plays an important buffer capacity role, and when a fault occurs in a front-stage process, the storage bin can insist for a period of time due to the fact that materials exist in the storage bin, and time is provided for first-stage process rush repair. However, as the moisture in the wet iron ore powder is more than 10 percent, the silicon content is more than 25 percent, the granularity is very fine, the arch camber and the blockage of the storage bin are easily caused, the feeding balance of a suspension magnetization roasting furnace system is damaged, the stable operation of the furnace system is influenced, and equipment and furnace shutdown can be damaged in severe cases, so the material is poked manually, the workload of operators is greatly increased, and meanwhile, safety addiction is suffered.
Drawings
Fig. 1 is a schematic structural view of a wet iron ore fine material bin device capable of preventing arching and breaking according to an embodiment of the present invention;
FIG. 2 is an enlarged view of section I of FIG. 1 (the tympanic membrane when the drum hammer is advanced);
FIG. 3 is an enlarged view of section I of FIG. 1 (the tympanic membrane in the retracted position of the drum hammer);
wherein the content of the first and second substances,
1-bin straight cylinder, 2-bin cone, 3-lining plate, 4-driving device, 5-drum hammer, 6-bracket, 7-drum membrane, 8-weighing belt scale and 9-computer.
Detailed Description
For better understanding of the present invention, the technical solutions and effects of the present invention will be described in detail by the following embodiments with reference to the accompanying drawings.
As shown in fig. 1, the wet iron ore powder storage bin device capable of preventing arching and arch breaking comprises a storage bin straight barrel body 1, a storage bin cone body 2, a lining plate 3, a driving device 4, a drum hammer 5, a support 6, a drum membrane 7 and a weighing belt scale 8, wherein the storage bin straight barrel body 1 is cylindrical, the lower end of the storage bin straight barrel body 1 is connected with the upper end of the storage bin cone body 2, and the lower end of the storage bin cone body is a discharge hole; the cross section of the discharge hole is trapezoidal; the bin cone is of an asymmetric structure with inconsistent side conicity, namely the bin cone is eccentric and asymmetric, and the center of a discharge hole of the bin cone is not on the central axis of the bin straight cylinder body 1; the lining plate 3 is fixed on the inner surfaces of the bin straight cylinder body 1 and the bin cone 2 to prevent the bin from arching, and the connection mode of the lining plate 3 and the inner surfaces of the bin straight cylinder body 1 and the bin cone 2 adopts glue bonding, countersunk head screw fixation or the two modes of simultaneous use; holes are formed in the bin cone and the lining plate 3 inside the bin cone in the circumferential direction, the drum hammers 5 are arranged in the holes, the number of the drum hammers 5 can be selected according to actual working conditions, the number is one or more, and one circumference or a plurality of circumferences can be arranged at different heights on the bin cone. The number of the drum hammers 5 in this embodiment is two.
The drum membrane 7 is arranged at the hole on the inner side of the lining plate 3, the surface of the drum membrane 7 is connected with the lining plate 3, the connection mode of the drum membrane 7 and the lining plate 3 adopts glue adhesion, countersunk head screw fixation or the two modes are used simultaneously, the drum hammer 5 is contacted with materials through the drum membrane 7, the drum membrane 7 is used for preventing the materials from leaking out of the bin, and simultaneously, the filter materials are prevented from entering the space between the drum hammer 5 and the bin wall to prevent the normal reciprocating action of the drum hammer 5. The drum hammer 5 is connected with a push rod of the driving device 4, the driving device 4 is arranged on a support 6, and the support 6 is fixed on a cone of the storage bin; the driving device 4 drives the drum hammer 5 to do reciprocating linear motion; the drum hammer 5, the drum membrane 7 and the driving device 4 are used for breaking the arch after the arch of the storage bin is opened, the driving device 4 pushes the drum hammer 5 to move forward to enable the drum membrane 7 to deform seriously and apply thrust to the filter material, so that the material arch collapses to break the arch, and the filter material flows out of the discharge port smoothly. Can prevent arching and broken wet iron ore powder storehouse device that encircles still includes computer 9, and the built-in DCS system of computer 9, drive arrangement 4, weighing belt weigher 8 and computer 9 electric connection. The DCS can receive the manually input target discharge amount and can be used as a comparison value of the discharge amount monitored in real time in the working process. Weighing belt weigher 8 weighs the filter material of outflow in real time, and give the built-in DCS system of computer 9 with weight signal transfer, the DCS system compares weight signal conversion for digital signal and target discharge, the discharge volume that weighing belt weigher 8 shows reduces after the feed bin arch camber, when the discharge volume that weighing belt weigher 8 received in DCS system transmitted is less than 5% of preset's target discharge volume, the DCS system will be with digital signal conversion switching signal to drive arrangement 4 send work order, drive arrangement 4 breaks the arch work: the push rod of the driving device 4 extends to push the drum hammer 5 to move towards the inner direction of the material bin cone 2, and the drum hammer 5 drives the drum membrane 7 to push the filter material, so that the filter material is arched and collapsed, the arch is damaged, and the filter material smoothly enters the discharge hole. When the forward displacement of the drum hammer 5 reaches the maximum value, namely the push rod of the driving device 4 moves to the maximum stroke, the DCS sends a reverse movement instruction to the driving device 4 to enable the push rod of the driving device 4 to retract to the original position, and at the moment, the drum membrane 7 restores to the original state due to the elastic action. The DCS system continuously monitors the weight signal transmitted by the bearing belt scale in real time, and when the discharge amount fed back to the DCS by the weighing belt scale 8 reaches a set range, namely a target amount, the DCS system sends a stop work instruction to the driving device 4, otherwise, the driving device 4 drives the drum hammer 5 to do reciprocating motion ceaselessly.
The weighing belt scale 8 is arranged below the discharge port and is not contacted with the lower edge of the discharge port, and plays a role in conveying, weighing and interlocking driving of the drum hammer 5.
As a preferable technical scheme, one end of the drum hammer 5 is an arc surface end, and the other end is a plane end, wherein the arc surface end faces the inside of the lining plate 3 and is in contact with the tympanic membrane 7; said flat end being connected to the push rod of the drive means 4.
Preferably, the lining plate 3 is an oily nylon plate which is low in surface activation energy, good in non-bonding performance, good in abrasive performance, low in friction coefficient, good in self-lubricating property and corrosion-resistant.
Preferably, the tympanic membrane 7 is a silicone rubber having high elasticity and fatigue resistance.
Preferably, the driving device 4 is used for driving the drum hammer 5 to move, and is driven by hydraulic pressure, pneumatic pressure or electric power. In this embodiment, the driving device 4 is a hydraulic device, and the flat end of the drum hammer 5 is connected with the push rod of the hydraulic device.
The device is also suitable for other wet powders.
The use method of the wet iron ore powder bin device capable of preventing arching and breaking arching comprises the following specific steps:
the method comprises the following steps: presetting a target discharge amount in a computer 9DCS system;
step two: the device is started, filter materials from a filter pressing workshop are continuously fed from the top of the bin straight cylinder body 1 and continuously flow out of the discharge hole of the bin cone body 2, and the weighing belt scale 8 is used for weighing the flowing filter materials in real time and transmitting the weighed filter materials to the DCS system arranged in the computer 9;
the viscosity of the filter material is changed due to the continuous change of the fineness, the moisture content and the silicon content of the filter material, and when the viscosity of the filter material is high, the filter material can arch and block at the cone 2 of the storage bin. The storage bin straight cylinder body 1 of the device is cylindrical, the storage bin cone 2 is of an asymmetric structure, the cross section of the discharge hole of the storage bin cone 2 is trapezoidal, and the lining plates 3 are arranged in the storage bin straight cylinder body 1 and the storage bin cone and are used for preventing a filter material from arching in the storage bin.
Step three: when the discharge amount displayed by the weighing belt scale 8 is reduced after the arch of the storage bin is arched, when the discharge amount is less than 5% of the preset discharge amount, the DCS system sends an instruction to the driving device 4, the driving device 4 works, a push rod of the driving device 4 extends to push the drum hammer 5 to move towards the inner direction of the storage bin cone, and the drum hammer 5 drives the drum membrane 7 to push the filter material, so that the arch of the filter material collapses, the arch is broken, and the filter material smoothly enters the discharge port, as shown in fig. 2;
step four: when the forward displacement of the drum hammer 5 reaches the maximum value, namely the push rod of the driving device 4 moves to the maximum stroke, the DCS system sends a reverse movement instruction to the driving device 4, the push rod of the driving device 4 retracts to the original position, and at this time, the eardrum 7 recovers to the original state due to the elastic action, as shown in fig. 3;
step five: and stopping working until the discharge amount fed back to the DCS by the weighing belt scale 8 reaches a set range, otherwise, driving the drum hammer 5 to continuously reciprocate by the driving device 4.
Claims (4)
1. A wet iron ore powder bin device capable of preventing arching and arch breaking comprises a bin straight cylinder body, a bin cone, a lining plate, a driving device, a drum hammer, a support, a drum membrane and a weighing belt scale, wherein the bin straight cylinder body is cylindrical, the lower end of the bin straight cylinder body is connected with the upper end of the bin cone, the lower end of the bin cone is a discharge port, and the cross section of the discharge port is trapezoidal; the bin cone is an asymmetric structure with inconsistent side taper; the lining plates are fixed on the inner surfaces of the bin straight cylinder body and the bin cone, and the connection mode of the lining plates and the inner surfaces of the bin straight cylinder body and the bin cone adopts glue adhesion, countersunk head screw fixation or the two modes of simultaneous use; the lining plate is an oily nylon plate which is low in surface activation energy, good in non-bonding performance, good in wear resistance, low in friction coefficient, good in self-lubricating property and corrosion resistant; the bin cone and the lining plate inside the bin cone are provided with holes along the circumferential direction, the drum hammer is arranged in the holes, the drum membrane is arranged at the holes on the inner side of the lining plate, the surface of the drum membrane is connected with the lining plate, the connection mode of the drum membrane and the lining plate adopts adhesive bonding, countersunk head screw fixation or the two modes of simultaneous use, and the drum hammer is contacted with materials through the drum membrane; the drum hammer is connected with a push rod of a driving device, the driving device is arranged on a support, and the support is fixed on a cone of the storage bin; one end of the drum hammer is an arc surface end, and the other end of the drum hammer is a plane end, and the arc surface end faces the interior of the lining plate and is in contact with the tympanic membrane; the plane end is connected with a push rod of the driving device; the tympanic membrane is made of silicon rubber with high elasticity and fatigue resistance; the weighing belt scale is arranged below the discharge port and is not contacted with the lower edge of the discharge port;
the wet iron ore powder bin device capable of preventing arching and breaking arching further comprises a computer, a DCS system is arranged in the computer, and the driving device, the weighing belt scale and the computer are electrically connected.
2. The apparatus for storing wet iron ore fine material bin capable of preventing arching and breaking according to claim 1, wherein: the number of the drum hammers can be selected according to the actual working condition, the number is one or more, and one circumference or a plurality of circumferences can be arranged at different heights on the cone of the storage bin.
3. The apparatus for storing wet iron ore fine material bin capable of preventing arching and breaking according to claim 1, wherein: the driving device is used for driving the drum hammer to move and is driven by hydraulic pressure, pneumatic pressure or electric power.
4. The use method of the wet iron ore fine material silo capable of preventing arching and breaking as claimed in any one of claims 1 to 3, characterized by comprising the steps of:
the method comprises the following steps: presetting a target discharge amount in a computer DCS system;
step two: the device is started, filter materials from a filter pressing workshop are continuously fed from the top of a straight cylinder body of a storage bin and continuously flow out from a discharge hole of a cone of the storage bin, and a weighing belt scale is used for weighing the flowing filter materials at any time and transmitting the weighed filter materials to a DCS (distributed control system) arranged in a computer;
step three: when the discharge amount displayed by the weighing belt scale is reduced after the storage bin is arched, when the discharge amount is less than 5% of the preset discharge amount, the DCS system sends an instruction to the driving device, the driving device works, a push rod of the driving device extends to push a drum hammer to move towards the inner direction of a conical body of the storage bin, and the drum hammer drives a drum membrane to push a filter material, so that the arch of the filter material collapses, the arch is broken, and the filter material smoothly enters a discharge port;
step four: when the forward displacement of the drum hammer reaches the maximum value, namely the push rod of the driving device moves to the maximum stroke, the DCS system sends a reverse movement instruction to the driving device, the push rod of the driving device retracts to the original position, and at the moment, the drum membrane restores to the original state due to the elastic action;
step five: and stopping working until the discharge amount fed back to the DCS by the weighing belt scale reaches a set range, otherwise, driving the drum hammer to continuously reciprocate by the driving device.
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| CN211544619U (en) * | 2020-01-16 | 2020-09-22 | 江西省欧陶科技有限公司 | Arch breaking device of feeding machine |
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| CN112978108A (en) | 2021-06-18 |
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