CN210314420U - Pelletizing system for oxidized pellets - Google Patents
Pelletizing system for oxidized pellets Download PDFInfo
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- CN210314420U CN210314420U CN201921352267.1U CN201921352267U CN210314420U CN 210314420 U CN210314420 U CN 210314420U CN 201921352267 U CN201921352267 U CN 201921352267U CN 210314420 U CN210314420 U CN 210314420U
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Abstract
The utility model provides a pelletizing system for oxidized pellets, which comprises a feeding component, a water adding component and a pelletizing disc; the feeding assembly comprises a storage bin, a feeding belt and a ball feeding belt, the feeding end of the feeding belt is positioned right below the storage bin, and the discharging end of the feeding belt is positioned right above the feeding area in the pelletizing disc; the ball inlet end of the ball feeding belt is arranged right below the ball outlet area in the pelletizing disc; the water feeding component comprises a pelletizing water feeding pipe and a water feeding control valve group, the water inlet end of the pelletizing water feeding pipe is communicated with a water source, and the water outlet end of the pelletizing water feeding pipe is arranged right above the feeding area in the pelletizing disc; and an image grabbing component is arranged in a ball outlet area in the pelletizing disc and used for grabbing images of the green oxidized balls. Use the technical scheme of the utility model, the effect is: the whole system is simple and convenient to operate; the image of green ball is grabbed in real time through the image grabbing component, so that the post staff can accurately know information such as specifications of the green ball, the adjustment of process parameters is facilitated, and the quality of the green ball is greatly improved.
Description
Technical Field
The utility model relates to an oxidation pelletizing production technical field, concretely relates to pelletizing system is used to oxidation pelletizing.
Background
The production process of the oxidized pellet mainly comprises a shaft furnace method, a belt type roasting machine method and a grate-rotary kiln method. Generally comprises the working procedures of batching, drying, mixing, pelletizing, screening, preheating, roasting and the like. In the production process of the 3 technological methods, pelletizing procedures are indispensable links and have important influence on the production level of the oxidized pellets.
The qualified green pellets produced in the pelletizing process have stable quality and stable yield, and can provide a good production basis for the subsequent preheating and roasting processes. The domestic pelletizing process commonly uses a disc pelletizer to pelletize balls. The main operation of post staff is to adjust the rotating speed of the disc and the water adding amount to adjust the size of the green pellets, and the on-site patrol ensures the stability of the pelletizing and feeding, thereby ensuring the stability of the yield and quality of the qualified green pellets of the pelletizing disc. The prior art has the defects that: (1) the post staff mainly judges the size of the green ball by naked eyes, small changes of the size of the green ball are difficult to perceive, and the small changes are easy to perceive only when the size of the green ball is obviously changed, so that the operation adjustment is delayed, and the production quality of the green ball is influenced; (2) the post staff needs to be responsible for the operation of more than two pelletizing disks at the same time, when the post staff performs operation adjustment on one pelletizing disk, the production conditions of the other pelletizing disks cannot be considered, and the quality deterioration of the other pelletizing disks cannot be found and adjusted at the first time; (3) the instability of pelletizing feeding causes the particularly large fluctuation of pelletizing production, such as the empty pelletizing bin or the blockage of the discharging opening of the pelletizing bin, and the phenomenon of belt material breakage occurs; (4) the post staff need to go round and go round between different balling discs and adjust the operation, and intensity of labour is very big, and personnel are easily tired and appear the condition of dredging the adjustment, and the balling post staff that the production line need dispose is in large quantity, and productivity is lower.
In conclusion, the development of the pelletizing system which is convenient to operate, stable in green ball quality and high in production efficiency is of great significance.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a structure is retrencied, convenient operation, green pellet stable in quality and high for the oxidation pelletizing system of production efficiency, concrete technical scheme as follows:
a pelletizing system for oxidized pellets comprises a feeding assembly, a water adding assembly and a pelletizing disc;
the feeding assembly comprises a storage bin, a feeding belt and a ball feeding belt, the feeding end of the feeding belt is positioned right below the storage bin, and the discharging end of the feeding belt is positioned right above the feeding area in the pelletizing disc; the ball inlet end of the ball feeding belt is arranged right below the ball outlet area in the pelletizing disc;
the water feeding assembly comprises a pelletizing water feeding pipe and a water feeding control valve group arranged on the pelletizing water feeding pipe, the water inlet end of the pelletizing water feeding pipe is communicated with a water source, and the water outlet end of the pelletizing water feeding pipe is arranged right above the feeding area in the pelletizing disc;
and the ball outlet area in the pelletizing disc is provided with an image grabbing component for grabbing images of the green oxidized balls.
Preferably, in the above technical scheme, the storage bin is provided with an auxiliary blanking part, and the auxiliary blanking part comprises dredging equipment and material detection equipment;
the dredging device is arranged at the position of a feed opening of the storage bin and is used for dredging the feed opening;
the material detection device comprises a support frame, a material level lever and a touch sensor, wherein the material level lever is movably arranged on the support frame, the lower end of the material level lever can fall into the material on the feeding belt through a feed opening, the upper end of the material level lever can contact with the touch sensor, and the touch sensor is connected with the dredging device.
Preferably, in the above technical scheme, the dredging device comprises a power source and a scraper, and the scraper is arranged inside the feed opening and connected with the power source; the scraper is driven by a power source to move to realize dredging of the feed opening.
Preferably among the above technical scheme, the scraper passes through annular ring gear and is connected with the power supply, realizes carrying out annular motion along the inner wall of feed opening.
Preferably, in the above technical solution, the support frame includes a U-shaped bracket and a connecting rod rotatably disposed at an opening of the U-shaped bracket along a horizontal direction, and a middle upper portion of the material level lever is disposed on the connecting rod; the weight of the lower end of the material level lever is 1.2-3.0 times of the weight of the upper end of the material level lever.
Preferably, a metering scale is arranged on the feeding belt and used for weighing the weight of the materials on the feeding belt.
Preferably, in the above technical solution, the apparatus further comprises a controller; the pelletizing disc, the bin, the feeding belt, the metering scale, the ball feeding belt, the water adding control valve group, the image grabbing component, the touch sensor and the power source are all connected with the controller; the controller is a PLC controller.
Preferably, the water feeding control valve set comprises an electromagnetic flowmeter and a proportional control valve which are both arranged on the pelletizing water feeding pipe.
Preferably, in the above technical solution, the image capture component is a camera.
Preferably, in the technical scheme, the working surface of the pelletizing disc and the vertical surface form an included angle of 40-55 degrees.
Use the technical scheme of the utility model, following beneficial effect has:
(1) the pelletizing system for the oxidized pellets of the utility model comprises a feeding component, a water adding component and a pelletizing disc; the feeding assembly comprises a storage bin, a feeding belt and a ball feeding belt, the feeding end of the feeding belt is positioned right below the storage bin, and the discharging end of the feeding belt is positioned right above the feeding area in the pelletizing disc; the ball inlet end of the ball feeding belt is arranged right below the ball outlet area in the pelletizing disc; the water feeding assembly comprises a pelletizing water feeding pipe and a water feeding control valve group arranged on the pelletizing water feeding pipe, the water inlet end of the pelletizing water feeding pipe is communicated with a water source, and the water outlet end of the pelletizing water feeding pipe is arranged right above the feeding area in the pelletizing disc; and the ball outlet area in the pelletizing disc is provided with an image grabbing component for grabbing images of the green oxidized balls. The whole system is simple and convenient to operate; the image of green ball is grabbed in real time through the image grabbing component, so that the post staff can accurately know information such as specifications of the green ball, the adjustment of process parameters is facilitated, and the quality of the green ball is greatly improved.
(2) The utility model discloses be equipped with supplementary unloading part on the well feed bin, supplementary unloading part is including dredging stifled equipment and material detection equipment; the dredging device is arranged at the position of a feed opening of the feeding device and is used for dredging the feed opening; the material detection device comprises a support frame, a material level lever and a touch sensor, wherein the material level lever is movably arranged on the support frame, the lower end of the material level lever can be in contact with a material falling onto a belt through a feed opening, the upper end of the material level lever can be in contact with the touch sensor, and the touch sensor is connected with the dredging device. The auxiliary blanking part has a simple structure; detect no unloading or the few condition of unloading through the material level lever, trigger the inductor through the material level lever and then control to dredge stifled equipment and move, can detect the condition that no unloading or unloading are few fast, realize the feed opening through the action of dredging stifled equipment and dredge stifled, can resume the unloading fast, convenient operation and practicality are strong, specifically are: when the storage bin does not discharge materials, the lower end of the material level lever is unsupported, the material level lever falls downwards under the action of gravity, and the upper end of the material level lever rises upwards; in the process of lifting the upper end, the touch sensor can be triggered, the dredging device receives a starting signal and starts to operate, the material at the feed opening is loosened, a bridge formed by the material is damaged, and the feed opening starts to feed again; after the feeding port starts to feed again, the lower end of a material supporting level lever stacked on the belt is slowly lifted, the upper end of the level lever descends, and when the upper end of the level lever is separated from the touch sensor, the dredging device stops working.
(3) The dredging device comprises a power source and a scraper, wherein the scraper is arranged inside the feed opening and is connected with the power source; the scraper is driven by the power source to act, so that the blockage dredging of the feed opening can be well realized. The scraper is connected with a power source through the annular gear ring, so that annular motion is realized along the inner wall of the feed opening, a bridge of the feed opening can be well damaged, and the dredging effect is good.
(4) The support frame comprises a U-shaped support and a connecting rod which can be rotatably arranged at the opening of the U-shaped support along the horizontal direction, and the middle upper part of the material level lever is arranged on the connecting rod; the weight of the lower end of the material level lever is 1.2-3.0 times of the weight of the upper end of the material level lever. The support frame adopts the combination of a U-shaped support and a connecting rod, so that the components are easy to obtain, and the free rotation of the material level lever can be ensured; the lower end of the material level lever is heavier than the upper end, so that the condition that the material level lever can quickly detect no material or less material is ensured, and the blanking is convenient to control. The U-shaped support and the connecting rod are made of steel, and parts are easy to obtain and long in service life.
(5) The utility model discloses in be equipped with the weigher on the feed belt for the weight of material on the weighing feed belt further ensures that pelletizing in-process feed is stable.
(6) The utility model also comprises a controller; the pelletizing disc, the bin, the feeding belt, the metering scale, the ball feeding belt, the water adding control valve group, the image grabbing component, the touch sensor and the power source are all connected with the controller; the controller is a PLC controller. The controller is adopted to control all the parts, and post staff do not need to roughly observe and judge the size of the ball according to human experience, so that automatic operation is realized, and the production efficiency and the precision are greatly improved.
(7) The water feeding control valve group in the utility model comprises an electromagnetic flowmeter and a proportional control valve which are both arranged on the pelletizing water feeding pipe; the image capture component is a camera. The parts are easy to obtain, the water adding amount can be accurately controlled, the images of the green ball can be accurately obtained through the camera, the parameters of the green ball are further obtained, post workers can conveniently adjust the process parameters, and the high-quality green ball is further obtained.
(8) The utility model discloses in the working face of balling disc forms 40-55 contained angles with vertical face, and the gradient of balling disc can adopt extensible member (telescopic cylinder, telescopic cylinder etc.) to adjust, satisfies different technological requirements.
In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:
FIG. 1 is a schematic structural view of a pelletizing system for oxidized pellets in the examples;
FIG. 2 is a schematic view of the balling disk of FIG. 1 taken at an angle to the vertical plane;
FIG. 3 is a schematic view of the storage bin, the auxiliary blanking part and the feeding belt conveyor of FIG. 1 in use;
wherein: 1. pelletizing disc, 1.1, play ball district, 2, feed bin, 2.1, feed opening, 3, feeding belt, 4, send the ball belt, 5, the pelletizing filler pipe, 6, add water control valve group, 6.1, electromagnetic flowmeter, 6.2, proportional control valve, 7, image snatchs the part, 8, dredge stifled equipment, 9, material check out test set, 9.1, support frame, 9.2, material level lever, 9.3, touch the inductor, 10, the controller, 11, the material.
Detailed Description
The embodiments of the invention will be described in detail hereinafter with reference to the accompanying drawings, but the invention can be implemented in many different ways, which are defined and covered by the claims.
Example (b):
referring to fig. 1, a pelletizing system for oxidized pellets specifically comprises a feeding assembly, a water adding assembly, a pelletizing disc 1 and a controller 10, and the details are as follows:
the working surface of the pelletizing disk 1 is arranged at an angle a of 40 to 55 (preferably 45) to the horizontal plane L, see fig. 2 in more detail.
The feeding assembly comprises a bin 2, a feeding belt 3 and a ball feeding belt 4, wherein the feeding end of the feeding belt 3 is positioned right below the bin 2, and the discharging end of the feeding belt 3 is positioned right above the feeding area in the pelletizing disc 1; the ball inlet end of the ball feeding belt 4 is arranged right below the ball outlet area 1.1 in the pelletizing disc 1. And a metering scale is arranged on the feeding belt 3 and used for weighing the weight of the material 11 on the feeding belt.
The water adding component comprises a pelletizing water adding pipe 5 and a water adding control valve group 6 arranged on the pelletizing water adding pipe 5, the water inlet end of the pelletizing water adding pipe 5 is communicated with a water source, and the water outlet end of the pelletizing water adding pipe is arranged right above the feeding area in the pelletizing disc 1. Preferably, the water adding control valve group 6 comprises an electromagnetic flowmeter 6.1 and a proportional control valve 6.2 which are both arranged on the pelletizing water adding pipe 5 and used for accurately controlling the water adding amount.
An image grabbing component 7 is arranged in the ball outlet area of the pelletizing disc 1, preferably, the image grabbing component 7 is a camera and is used for grabbing images of the raw oxidized ball.
In this embodiment, be equipped with supplementary unloading part on the feed bin 2, supplementary unloading part is including dredging stifled equipment 8 and material check out test set 9, see in detail fig. 3:
and the dredging device 8 is arranged at the position of the feed opening 2.1 of the storage bin 2 and is used for dredging the feed opening. The dredging device 8 comprises a power source and a scraper, and the scraper is arranged inside the feed opening and is connected with the power source; the scraper is driven by a power source to move to realize dredging of the feed opening. The scraper is connected with the power source through the annular gear ring, and annular movement is carried out along the inner wall of the feed opening. Preferably, the dredging device is a dredging machine, and the dredging machine is connected with the feed opening through a flange.
Material check out test set 9 includes support frame 9.1, material level lever 9.2 and touches inductor 9.3 (can adopt inductor BF1-M211K, and wherein BF is the brand, and M211 is the model, and K represents passive opening point), material level lever 9.2 activity sets up on the support frame 9.1, material level lever 9.2's lower extreme can fall into with the feed opening material on the feed belt 3 contacts, material level lever 9.2's upper end can contact with touching inductor 9.3, touches inductor 9.3 and dredge stifled equipment 8 and be connected. The supporting frame 9.1 comprises a U-shaped support and a connecting rod which can be rotatably arranged at an opening of the U-shaped support along the horizontal direction, and the middle upper part of the material level lever 9.2 is arranged on the connecting rod; the weight of the lower end of the material level lever 9.2 is 1.2-3.0 times of the weight of the upper end of the material level lever (the lower end of the material level lever can freely fall under the action of gravity). The U-shaped support and the connecting rod are made of steel. The U-shaped support is movably arranged on the support frame of the belt.
In this embodiment, the pelletizing disc 1, the bin 2, the feeding belt 3, the weighing scale, the ball feeding belt 4, the electromagnetic flowmeter 6.1, the proportional control valve 6.2, the image capturing component 7, the touch sensor 9.3 and the power source are all connected with the controller 10; the controller 10 is a PLC controller with a liquid crystal display.
The technical scheme of the embodiment is specifically as follows:
the material 11 falls from the bin 2 onto the feeding belt 3, and the feeding belt 3 conveys the material to the feeding area of the pelletizing disc 1; water enters from the inlet end of a pelletizing water feeding pipe 5, passes through an electromagnetic flowmeter 6.1 and a proportional control valve 6.2 in a water feeding control valve group 6 and then enters a feeding area of a pelletizing disc 1 from a water outlet end; the material and water are pelletized along with the rotation of the pelletizing disc, the pelletized green pellets fall to the pellet feeding belt 4 through the pellet outlet area of the pelletizing disc, and the pellet feeding belt 4 feeds the green pellets to the next process. After the green ball passes through the ball outlet area, the image is captured by the image capturing component 7 (camera), the green ball image is sent to the controller for image processing and analysis (see the prior art for details), the specification information of the green ball (namely the size of the green ball) is obtained, and the post worker adjusts the rotating speed and the water adding flow of the pelletizing disc 1 according to the green ball specification information to manufacture the qualified green ball. In this embodiment, can also be according to the demand, through the settlement of controller, direct automated adjustment balling disc 1's rotational speed and the flow of adding water realize automated control, improve production efficiency.
The material of the bin 2 is normally discharged, the feeding belt 3 normally runs, the lower end of the material level lever 9.2 is supported by the material 11 on the feeding belt 3, cannot fall down and is in a lifting state, and the upper part of the material level lever 9.2 is in a falling state (separated from the touch sensor 9.3); the material bin 2 starts to discharge materials, the feeding belt 3 continues to operate, the feeding belt 3 below the material level lever 9.2 has no materials (after about 2 s), the lower end of the head of the material level lever 9.2 lifts up the upper end of the material level lever 9.2, the touch sensor 9.3 is triggered in the process of lifting up the upper end, the dredging machine receives a starting signal, the scraper starts to operate, the discharging opening slowly recovers the discharging materials under the action of the operation of the scraper, the materials on the feeding belt slowly increase, the lower end of the material level lever starts to lift up along with the increase of the materials on the feeding belt, the upper end of the material level lever slowly descends, when the materials on the feeding belt are enough, the upper end of the material level lever descends to be separated from the touch sensor, the starting signal received by the dredging machine disappears, the dredging machine stops operating, and.
By applying the embodiment, the effects are as follows:
1. according to the exploration of the pelletizing process of post workers, the optimal disc inclination angle, disc feeding amount and binder ratio are determined, and the pelletizing process is ensured to ensure that the pelletizing disc pelletizing production quality is ensured only by adjusting the disc rotating speed and the water adding amount.
2. The feed bin adopts weighing type feed bin, and feed bin weight signal passes through the communication and inserts the PLC controller, is less than 20t when feed bin weight, then automatic supplementary balling raw materials. The feed bin unloading sets up supplementary unloading part, detects the circumstances that no unloading or unloading are few through the material level lever, triggers the inductor through the material level lever and then controls to dredge stifled equipment and move, can detect the circumstances that no unloading or unloading are few fast, realizes that the feed opening dredges stifled through the action of dredging stifled equipment, can resume the unloading fast, through these two means, guarantees that the balling feed is stable, provides the basis for balling steady production.
3. The high-speed camera mounting point is arranged on a slide carriage of the pelletizing disc outlet area, and the individual overlapping of the green balls in the area is less, so that the subsequent image processing is facilitated. The collected images are processed by using an image processing technology (OpenMV3 software) to obtain green ball size data 4, and a group of green ball images are collected every 3s and analyzed to obtain the particle size of each green ball in each group of green ball images and the number and the proportion of the green balls in a certain particle size range.
5. And after the statistics of each group of image data is finished, integrating and counting data of nearly 40s to obtain the number and the proportion of the spheroids in the particle size range of nearly more than 40s, displaying the spheroids on a liquid crystal display interface of the PLC, and updating the spheroids in real time.
6. The pelletizing disc is provided with a frequency conversion device, frequency conversion signals are connected into the PLC, the frequency conversion rate and the disc rotating speed are converted one by one, and the disc rotating speed can be adjusted through the PLC and displayed.
7. The reliable water feeding flow control system includes high precision electromagnetic flowmeter, small flow high precision proportional flow valve and relevant communication and control facilities.
8. And the post staff adjust the pelletizing conditions by adjusting the rotating speed of the corresponding disc and the water flow control system of the corresponding pelletizing disc according to the proportion of each pelletizing disc in each particle size range displayed on the liquid crystal display interface.
9. The qualified particle size range of the green pellets is d which is more than or equal to 8Particle size<16mm and wide range, and the particle size range of green pellets is not less than 10 d in the actual production processParticle size<The higher the proportion of 14mm green pellets is, the better the green pellet size range is, d is more than or equal to 8Particle size<Although 10mm is qualified green pellets, the green pellets are small in size, and the distribution of the green pellets on the chain grate causes poor air permeability of a material layer and reduces drying efficiency. The particle size range of the green pellets is not less than 14 dParticle size<Although the raw balls with the diameter of 16mm are qualified, the raw balls have larger size, and the oxidation reaction rate is low in the subsequent preheating and roasting processes, so that the strength of the finished product is influenced. According to the process requirements, the upper limit alarm of the green pellet proportion in different particle size ranges is set, so that the post staff can know the green pellet condition conveniently. The real-time green ball occupation ratio exceeds the set upper limit, and the system gives an alarm to prompt a post worker to adjust the work correspondingly as follows:
1. determining a disc inclination angle of 47 degrees, a disc feeding amount of 55t/h and a binder ratio of 2 percent, acquiring green ball images of a 5# pelletizing disc ball outlet area by a high-speed industrial camera, and carrying out image processing and statistics on the images to obtain the particle size of the green balls and the number and the proportion of the green balls in a certain particle size range. The specific data are as follows: d is not less than 0Particle size<4 percent of 8mm green pellets and d is not less than 8Particle size<The raw ball with the diameter of 10mm accounts for 32 percent, and the particle diameter d is not less than 10<25 percent of raw balls with 12mm and the particle diameter of not less than 12 d<15 percent of 14mm green pellets and d is not less than 14mmParticle size<The ratio of the 16mm raw ball to the 16mm raw ball is 18 percent and 16mm<dParticle sizeThe green ball accounts for 6 percent. Wherein d is more than or equal to 8Particle size<The weight percentage of raw pellets of 10mm is 32%, the weight percentage of raw pellets of small particle size is higher than the upper limit of the weight percentage of raw pellets of large particle size, the weight percentage of raw pellets of small particle size is too much, the weight percentage of raw pellets of small particle size needs to be reduced, the weight percentage of raw pellets of large particle size is increased, at the moment, an electromagnetic flowmeter displays that the water adding flow is 0.5t/h, the rotating speed of a disc is 7.6r/min, a post worker controls a proportional flow valve through a water adding flow control system to increase the water adding amount to 0.6t/h by a small amount, the weight percentage of raw pellets of different particle size ranges begins. The ratio of green pellets in each particle size range after stabilization is as follows: d is not less than 0Particle size<3 percent of 8mm green pellets and d is not less than 8Particle size<24 percent of 10mm green ball and d is more than or equal to 10 percentParticle size<26 percent of raw balls with the diameter of 12mm and d not less than 12 percentParticle size<20 percent of 14mm green pellets and d is not less than 14mmParticle size<19 percent of 16mm green ball and 16mm<dParticle sizeThe raw ball accounts for 8 percent. The goal of pelletizing is achieved through the operation and adjustment of post staff. Meanwhile, the green pellet size analysis and control of the pellet outlet area of the disc pelletizer are all on the same liquid crystal display interface of the PLC, and the post staff adopt the same operation to achieve the centralized control of pelletizing.
2. Determining a disc inclination angle of 47 degrees, a disc feeding amount of 55t/h and a binder ratio of 2 percent, acquiring green ball images of a 5# pelletizing disc ball outlet area by a high-speed industrial camera, and carrying out image processing and statistics on the images to obtain the particle size of the green balls and the number and the proportion of the green balls in a certain particle size range. The specific data are as follows: d is not less than 0Particle size<2 percent of 8mm green ball and d is not less than 8Particle size<15 percent of raw ball with the diameter of 10mm and the particle diameter of not less than d<The 12mm green ball accounts for 22 percent, and the particle diameter is not less than 12 and not more than d<24 percent of 14mm green ball and no more than 14 percent of dParticle size<28 percent of raw balls with the diameter of 16mm and 16mm<dParticle sizeThe raw ball accounts for 9 percent. Wherein d is not less than 14Particle size<The proportion of 16mm green pellets is 28 percent, the proportion of the green pellets with large particle size is higher than the upper limit of the proportion of the green pellets with large particle size, the proportion of the green pellets with large particle size needs to be reduced, the proportion of the green pellets with small particle size needs to be increased, at the moment, the electromagnetic flowmeter displays that the water adding flow is 0.5t/h, the rotating speed of a disc is 7.6r/min, and the post positionStaff control the proportional flow valve through adding water flow control system and increase the volume of water addition by a small amount to 0.4t/h, the volume of water addition is small, the volume of water addition is not suitable to be reduced, post staff reduce the balling disc rotational speed through the balling experience, reduce to 7.4r/min from 7.8r/min, after the adjustment, the balling occupation ratio of different particle size ranges begins to change, and is gradually stabilized after about 3 min. The ratio of green pellets in each particle size range after stabilization is as follows: d is not less than 0Particle size<4 percent of 8mm green pellets and d is not less than 8Particle size<23 percent of raw balls with the diameter of 10mm and d is more than or equal to 10 ≤Particle size<23 percent of 12mm green ball and d is more than or equal to 12Particle size<25 percent of 14mm green ball and no more than 14 percent of dParticle size<The ratio of the 16mm raw ball to the 16mm raw ball is 18 percent and 16mm<dParticle sizeThe raw ball accounts for 7 percent. The goal of pelletizing is achieved through the operation and adjustment of post staff. Meanwhile, the green pellet size analysis and control of the pellet outlet area of the disc pelletizer are all on the same liquid crystal display interface of the PLC, and the post staff adopt the same operation to achieve the centralized control of pelletizing.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The pelletizing system for the oxidized pellets is characterized by comprising a feeding assembly, a water adding assembly and a pelletizing disc (1);
the feeding assembly comprises a storage bin (2), a feeding belt (3) and a ball feeding belt (4), the feeding end of the feeding belt (3) is positioned right below the storage bin (2), and the discharging end of the feeding belt (3) is positioned right above the feeding area in the pelletizing disc (1); the ball inlet end of the ball feeding belt (4) is arranged right below the ball outlet area (1.1) in the pelletizing disc (1);
the water adding assembly comprises a pelletizing water adding pipe (5) and a water adding control valve group (6) arranged on the pelletizing water adding pipe (5), the water inlet end of the pelletizing water adding pipe (5) is communicated with a water source, and the water outlet end of the pelletizing water adding pipe is arranged right above the feeding area in the pelletizing disc (1);
an image grabbing component (7) is arranged in a ball outlet area (1.1) of the pelletizing disc (1) and used for grabbing images of the green oxidized balls.
2. The pelletizing system for the oxidized pellets according to claim 1, wherein an auxiliary blanking part is arranged on the bin (2), and the auxiliary blanking part comprises a dredging device (8) and a material detecting device (9);
the dredging device (8) is arranged at the position of a feed opening (2.1) of the storage bin (2) and is used for dredging the feed opening;
material check out test set (9) is including support frame (9.1), material level lever (9.2) and touch inductor (9.3), material level lever (9.2) activity sets up on support frame (9.1), the lower extreme of material level lever (9.2) can fall into with the feed opening material on feed belt (3) contacts, and the upper end of material level lever (9.2) can contact with touch inductor (9.3), touches inductor (9.3) and dredge stifled equipment (8) and be connected.
3. The pelletizing system for oxidized pellets according to claim 2, characterized in that the dredging device (8) comprises a power source and a scraper, wherein the scraper is arranged inside the feed opening and connected with the power source; the scraper is driven by a power source to move to realize dredging of the feed opening.
4. The pelletizing system for oxidized pellets according to claim 3, wherein the scraper is connected with a power source through an annular gear ring to realize annular movement along the inner wall of the feed opening.
5. Pelletizing system for oxidized pellets according to claim 2, characterized in that the support frame (9.1) comprises a U-shaped bracket and a connecting rod rotatably arranged at the opening of the U-shaped bracket in the horizontal direction, the middle upper part of the level lever (9.2) being arranged on the connecting rod; the weight of the lower end of the material level lever (9.2) is 1.2-3.0 times of the weight of the upper end of the material level lever.
6. Pelletizing system for oxidized pellets according to any of claims 3-5, characterized in that the feeding belt (3) is provided with a weighing scale for weighing the material on the feeding belt.
7. The pelletizing system for oxidized pellets according to claim 6, further comprising a controller (10); the pelletizing disc (1), the storage bin (2), the feeding belt (3), the metering scale, the ball conveying belt (4), the water adding control valve group (6), the image grabbing component (7), the touch sensor (9.3) and the power source are all connected with the controller (10); the controller (10) is a PLC controller.
8. Pelletizing system for oxidized pellets according to claim 6, characterized in that the watering control valve group (6) comprises an electromagnetic flow meter (6.1) and a proportional control valve (6.2) both arranged on the pelletizing watering pipe (5).
9. Pelletizing system for oxidized pellets according to claim 6, characterized in that the image grabbing part (7) is a camera.
10. Pelletizing system for oxidized pellets according to claim 1, characterized in that the working surface of the pelletizing disc (1) forms an angle of 40 ° -55 ° with the vertical.
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| CN113249567A (en) * | 2021-06-03 | 2021-08-13 | 中冶北方（大连）工程技术有限公司 | System and method for monitoring and controlling pellet ore granularity based on volume analysis |
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