High-carbon ferrochrome on-line screening equipment and high-carbon ferrochrome on-line screening method

Abstract

High-carbon ferro-chrome online screening equipment comprises a material flow dividing device, a flow dividing valve is arranged in the material flow dividing device, the material flow dividing device comprises a first flow dividing path used for directly outputting materials to participate in production, and the material flow dividing device comprises a second flow dividing path used for outputting the materials to a screening process; the vibration screening device is connected with the second flow dividing path, large-particle materials screened out by the vibration screening device are directly output to participate in production, and small-particle materials and / or powdery materials screened out by the vibration screening device are / is conveyed to downstream equipment through a pipeline system; and the downstream equipment comprises a stock bin, and the stock bin is overhead and used for collecting and discharging the screened small-particle materials and / or powdery materials. Meanwhile, the invention further provides a high-carbon ferrochrome online screening method using the screening equipment. According to the method, the utilization rate of the high-carbon ferrochrome can be increased, waste of small-particle powder in the high-carbon ferrochrome is avoided, and the production and operation cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field related to ore screening equipment, and more specifically, to a high-carbon ferrochrome online screening equipment and a high-carbon ferrochrome online screening method. Background Art

[0002] The high-chromium iron ore materials generally used in steel mills are all foreign bulk high-chromium iron ore materials, and each batch of bulk high-chromium iron ore materials generally contains more than 10% high-chromium powder. In the original steelmaking production process, when the high-chromium iron ore is added to the AOD furnace through the vaporization flue feeding pipe, the high-chromium iron ore powder will be pumped away and turned into dust removal waste, causing waste and increasing production costs. If a vibrating screen is used to screen the high-chromium iron ore materials, a large amount of dust will be generated, which will not only pollute the environment, but also cause great harm to the health of employees. Summary of the invention

[0003] 1. Technical issues

[0004] In the face of existing technical problems, how to provide an online screening device for high-chromium iron ore, through which the utilization rate of high-chromium iron ore can be improved, thereby reducing production and operation costs and reducing the impact of dust on the environment and employees, has become a problem that needs to be urgently solved by technical personnel in this field.

[0005] (II) Technical solution

[0006] In order to achieve the above object, the present invention provides a high carbon ferrochrome online screening device. In the present invention, the high carbon ferrochrome online screening device comprises:

[0007] A material diversion device, wherein a diversion valve is provided in the material diversion device, and the material delivery is diverted by the diversion valve, the material diversion device comprises a first diversion path for directly outputting the material and participating in the production, and the material diversion device comprises a second diversion path for outputting the material to the vibration screening process;

[0008] A vibration screening device connected to the second shunt path, used to receive materials to be vibrated and screened and vibrate them, the large particles screened by the vibration screening device are directly output to participate in production, and the small particles and / or powdered materials screened by the vibration screening device are transported to downstream equipment through a pipeline system;

[0009] The downstream equipment includes a silo, which is an overhead structure and is used to collect the screened small particle materials and / or powdery materials and can discharge the materials in a controlled manner.

[0010] Preferably, in the high carbon ferrochrome online screening equipment provided by the present invention, the material diversion device includes a diversion device feed inlet, a diversion fluid is arranged below the diversion device feed inlet, the diversion valve is arranged in the diversion fluid, and the diversion fluid is connected to the first diversion path and the second diversion path.

[0011] Preferably, in the high carbon ferrochrome online screening equipment provided by the present invention, at least two material diverting devices are provided for diverting different materials; and the second diverting paths of all the material diverting devices are connected.

[0012] Preferably, in the high carbon ferrochrome online screening equipment provided by the present invention, a conveying system is connected to the first diversion path, which is used to output the diverted material and / or the screened large particle material and participate in the production; the vibrating screening device includes a vibrating screen, and the vibrating screen includes a vibrating screening output end and a bottom collecting bin, the vibrating screening output end is connected to the conveying system, which is used to output the screened large particle material to the conveying system, and the bottom collecting bin is used to collect and transfer the screened small particle material and / or powdered material.

[0013] Preferably, in the high-carbon ferrochrome online screening equipment provided by the present invention, the pipeline system includes a first horizontal conveying pipe, in which a screw conveying device is arranged for realizing the lateral conveying of the material in the first horizontal conveying pipe, the first horizontal conveying pipe is arranged below the vibrating screening device and above the silo, the first horizontal conveying pipe is connected to the bottom collecting silo through a first vertical pipe; the end of the first horizontal conveying pipe is connected to a second vertical pipe, and the second vertical pipe is connected to the silo.

[0014] Preferably, the high carbon ferrochrome online screening equipment provided by the present invention also includes a dust removal system, which includes a dust removal device, a dust removal conveying pipe, and a dust hood for being set at the dust generating part of the equipment or the connection between equipments, the dust removal device is used to collect dust, the dust removal device is connected to the dust hood through the dust removal conveying pipe, and the dust removal device is connected to the silo for conveying the collected dust to the silo.

[0015] Preferably, in the high-carbon ferrochrome online screening equipment provided by the present invention, a dust collecting bin is provided at the bottom of the dust removal device, a second transverse conveying pipe is connected to the bottom opening of the dust collecting bin, a screw conveying device is provided in the second transverse conveying pipe for realizing the transverse conveyance of the material in the second transverse conveying pipe, and the end of the second transverse conveying pipe is connected to the silo.

[0016] Preferably, in the high-carbon ferrochrome online screening equipment provided by the present invention, the setting height of the dust removal device is higher than the setting height of the silo, and the setting height of the second horizontal pipe is higher than the setting height of the silo; a third vertical pipe is provided at the end of the second horizontal pipe, and the third vertical pipe is connected to the silo.

[0017] The present invention also provides a high carbon ferrochrome online screening method. In the present invention, the high carbon ferrochrome online screening method uses the high carbon ferrochrome online screening equipment as described above to screen the material.

[0018] In the present invention, the high carbon ferrochrome online screening method comprises:

[0019] Step 1: roughly classify the same material to form materials that need to be screened and materials that do not need to be screened;

[0020] Step 2: transport the same type of materials after rough classification to the material diversion device for diversion. The materials that do not need to be screened directly participate in the production after passing through the first diversion path, and the materials that need to be screened are transported to the vibration screening device after passing through the second diversion path;

[0021] Step 3: The material is screened by a vibrating screening device to obtain the oversize and undersize materials. The oversize materials are directly transported to the production through the conveying system, and the undersize materials are transported to the silo for storage and standby.

[0022] Preferably, in the high carbon ferrochrome online screening method provided by the present invention, in the step 2, the particle size of the material on the sieve is greater than 5 mm, and the particle size of the material under the sieve is not greater than 5 mm.

[0023] (III) Beneficial effects

[0024] As can be seen from the above, the present invention provides an online screening device for high carbon ferrochrome. Based on the screening device, the present invention also provides an online screening method for high carbon ferrochrome. In the present invention, the online screening device for high carbon ferrochrome includes: a material diversion device, a diversion valve is arranged in the material diversion device, and the material delivery is diverted by the diversion valve. The material diversion device includes a first diversion path for direct output of the material to participate in production, and the material diversion device includes a second diversion path for outputting the material to the screening process; a vibration screening device is connected with the second diversion path, and is used to receive the material that needs to be vibrated and screened and vibrate and screen it. The large particle material screened by the vibration screening device is directly output to participate in production, and the small particle material and / or powder material screened by the vibration screening device is transported to the downstream equipment through the pipeline system; the downstream equipment includes a silo, and the silo is overhead, which is used to collect the screened small particle material and / or powder material and can be discharged in a controlled manner. The present invention is provided with a material diverting device, and the materials to be screened are vibrated and screened by a vibrating screening device after diversion, and different materials after screening are subjected to different subsequent treatments according to needs, thereby improving the utilization rate of high-carbon ferrochrome, avoiding the waste of small particle powder of high-carbon ferrochrome, and reducing the production and operation costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. Among them:

[0026] Figure 1 It is a schematic structural diagram of the side surface of the high carbon ferrochrome online screening equipment in an embodiment of the present invention;

[0027] Figure 2 This is a schematic structural diagram of the front side of the high carbon ferrochrome online screening equipment in an embodiment of the present invention;

[0028] Figure 3 This is a schematic structural diagram of a dust removal device in a high carbon ferrochrome online screening device according to an embodiment of the present invention;

[0029] Figure 4 It is a process flow chart of the high carbon ferrochrome online screening equipment in an embodiment of the present invention.

[0030] Figures 1 to 3 In the figure, the corresponding relationship between the component names and the reference numerals is as follows:

[0031] Material diversion device 1, first diversion path 2, second diversion path 3, vibration screening device 4, silo 5, conveying system 6, bottom collection bin 7, first horizontal delivery pipe 8, dust removal device 9,

[0032] Dust collecting bin 10 and second transverse delivery pipe 11. DETAILED DESCRIPTION

[0033] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. Each example is provided by way of explanation of the present invention and does not limit the present invention. In fact, it will be clear to those skilled in the art that modifications and variations may be made in the present invention without departing from the scope or spirit of the present invention. For example, a feature shown or described as a part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desired that the present invention encompasses such modifications and variations within the scope of the appended claims and their equivalents.

[0034] In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention. The terms "connected" and "connected" used in the present invention should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0035] Please refer to Figures 1 to 4 ,in, Figure 1 It is a schematic structural diagram of the side surface of the high carbon ferrochrome online screening equipment in an embodiment of the present invention; Figure 2 This is a schematic structural diagram of the front side of the high carbon ferrochrome online screening equipment in an embodiment of the present invention; Figure 3 This is a schematic structural diagram of a dust removal device in a high carbon ferrochrome online screening device according to an embodiment of the present invention; Figure 4 It is a process flow chart of the high carbon ferrochrome online screening equipment in an embodiment of the present invention.

[0036] The present invention provides a high-carbon ferrochrome online screening device. The high-carbon ferrochrome online screening device provided by the present invention is used in conjunction with an existing belt conveyor system (the existing belt conveyor system is provided with two belts, which are used to convey limestone and high-carbon ferrochrome ore respectively). Under the premise of not affecting the original ore raw material transportation channel, the high-carbon ferrochrome ore can be screened at the same time, and the functions of collecting, transporting, storing, and dust removing the powder after screening can also be realized.

[0037] In the present invention, the high carbon ferrochrome online screening equipment comprises the following components:

[0038] 1. Material diversion device 1. A material diversion device 1 is used to divert a material (either limestone or high-carbon chromite ore), and can divert large-particle materials that do not need to be screened (for example, for a batch of high-carbon chromite ore, the materials on the upper part of the stacked high-carbon chromite ore are basically large-particle materials, basically containing no small-particle materials and powdered materials, and can be directly involved in production without screening) from materials that need to be screened (for example, the materials in the lower layer of the stacked high-carbon chromite ore, that is, containing large-particle materials, and also containing a large amount of small-particle materials and powdered materials) (the transportation of materials is diverted according to whether the materials need to be screened). In the present invention, a diversion valve is set in the material diversion device 1, and the transportation of materials is diverted by the diversion valve. The material diversion device 1 includes a first diversion path 2 for direct output of materials to participate in production, and the material diversion device 1 includes a second diversion path 3 for outputting materials to the screening process. Specifically, the material diverter device 1 is made of metal sheet. Specifically, the material diverter device 1 includes a diverter device feed port. The diverter device feed port is a vertically arranged cylindrical structure, which can be a rectangular cylindrical structure or a cylindrical structure. An opening is arranged at the top of the diverter device feed port (in order to facilitate the entry of materials, the present invention can be provided with a hopper device at the opening). The opening structure is used for the entry of materials (connected with the existing belt conveyor system, and the materials conveyed by the belt conveyor system enter the diverter device feed port through the top opening of the diverter device feed port). A diverter body is arranged downward in the vertical direction and located below the diverter device feed port. The diverter body has two forks (i.e., two branches). A diverter valve is arranged in the diverter body. The diverter valve is a diverter valve with a remote control function, which can be remotely controlled to switch between the two forks. In the present invention, the diverter is an inverted Y-shaped structure, which has a top opening and two bottom openings, the top opening is connected to the two bottom openings, and a diverter valve is arranged in the diverter, which can realize the separate connection between the top opening and the two bottom openings. The top opening of the diverter is connected to the feed port of the separation device, or the top opening of the diverter is an integrated structure with the feed port of the diverter. The bottom opening of the diverter is respectively connected to the first diverter path 2 and the second diverter path 3, the first diverter path 2 is used for the output of large particle materials, and the second diverter path 3 is used for the output of materials that need to be screened. In one embodiment of the present invention, the setting height of the material diverter 1 is basically the highest, so the present invention adopts a large-angle belt conveyor system to transport materials to the material diverter 1. At the same time, the present invention can also set a frame according to the structure of the material diverter 1, that is, the material diverter 1 can be stably installed on the building foundation, and the material diverter 1 can be firmly installed (the material diverter 1 is suspended, so as to facilitate the setting of the inclination angle of the first diverter path 2 and the second diverter path 3).In the prior art, materials include two categories, namely limestone and high-carbon chromite ore. Therefore, in the present invention, at least two material diversion devices 1 are provided for diverting different materials, and the second diversion paths 3 of all material diversion devices 1 are connected.

[0039] 2. Vibration screening device 4. The vibration screening device 4 is an industrial vibration screening device used to screen mineral materials. In the present invention, the vibration screening device 4 includes a vibration screen. The material to be screened is transported to the vibration screening device 4 and dispersed on the vibration screen. The vibration screen is driven by a power device to vibrate. The material with a larger diameter stays on the vibration screen, and the material with a smaller diameter or powdered material leaks through the vibration screen. In this way, the material is screened by the vibration screening device 4. For the vibrating screen, the vibrating screen includes a vibrating screening output end (during the vibrating screening process, the material remaining on the vibrating screen will "flow" in an orderly manner toward the vibrating screening output end under the vibration of the vibrating screen until it is output at the vibrating screening output end), and a bottom collecting bin 7 is arranged at the bottom of the vibrating screen, and the vibrating screening output end is connected to the conveying system 6 (connection is achieved through a chute device) and is used to output the screened large particle material (screened material, i.e., material with a larger diameter) to the conveying system 6, and the bottom collecting bin 7 is used to collect and transfer the screened small particle material and / or powdered material (screened material, i.e., material leaking from the vibrating screen through vibration). In the present invention, the vibrating screen is inclined, specifically, the vibrating screen is inclined in a direction perpendicular to the direction in which the conveying system conveys the materials, that is, the end of the vibrating screen close to the conveying system is inclined toward the conveying system, and the end of the vibrating screen close to the conveying system is the low end, i.e., the vibrating screening output end. The inclined vibrating screen can make the materials with larger diameters remaining on the vibrating screen "flow" more smoothly to the vibrating screening output end. The present invention also provides a chute for the connection between the vibrating screen and the conveying system.

[0040] The vibrating screen is connected to the second diversion path 3 (the connection can be achieved through a chute device), and is used to receive materials that need to be vibrated and screened and vibrate and screen them. The large particle materials (materials with larger diameters screened out from the materials that need to be screened) screened out by the vibrating screening device 4 are directly output to participate in production, and the small particle materials (materials with smaller diameters screened out from the materials that need to be screened) and / or powdered materials screened out by the vibrating screening device 4 are transported to downstream equipment through a pipeline system.

[0041] 3. Silo 5. Silo 5 is made of metal sheet and has a funnel-shaped structure. Silo 5 is suspended by a metal frame and has an electric gate at its bottom for collecting the screened small particles and / or powdered materials and discharging them under control (controlled by the control room). An opening is provided at the top of silo 5, which is connected to the ends of each vertical pipe in the pipeline system for inputting the screened small particles and powdered materials. The materials are stored in silo 5 and can be transported to the downstream process by transfer equipment (such as a transfer vehicle for transfer) after the electric gate is opened.

[0042] 4. Conveying system 6. The conveying system 6 is connected with the first diversion path 2 and is used to output the diverted and / or screened large particle materials to participate in production. The conveying system 6 adopts a belt conveying method to output the large particle materials in a directional and fixed-point manner.

[0043] 5. Pipeline system. The pipeline system includes a first transverse conveying pipe 8, in which a screw conveying device is arranged to realize the transverse conveying of the material in the first transverse conveying pipe 8. The first transverse conveying pipe 8 is arranged below the vibration screening device 4 and above the silo 5. The first transverse conveying pipe 8 is connected to the bottom collecting bin 7 through a first vertical pipe; the end of the first transverse conveying pipe 8 is connected to a second vertical pipe, and the second vertical pipe is connected to the silo 5. The main structure of the pipeline system is a circular pipe. No conveying device is arranged in the vertical pipe. The material falls freely in the pipe due to gravity. The transverse pipe is arranged horizontally to realize the transverse conveying of the material. A screw conveying device is arranged in the transverse pipe, and the transverse conveying of the material is realized by the screw conveying device. In the present invention, the specific layout of the pipeline system is not specifically limited, as long as the point-to-point conveying of the material can be realized.

[0044] 6. Dust removal system. The dust removal system is used to achieve dust suction and collection. The dust removal system includes a dust removal device 9, a dust removal conveying pipe, and a dust hood that is used to be set at the dust generating part of the equipment or the connection between equipment. The dust removal device 9 is used to collect dust. The dust removal device 9 is connected to the dust hood through the dust removal conveying pipe. The dust removal device 9 is connected to the silo 5 and is used to transport the collected dust to the silo 5. A dust collection silo 10 is provided at the bottom of the dust removal device 9. A second transverse conveying pipe 11 is connected to the bottom opening of the dust collection silo 10. A spiral conveying device is provided in the second transverse conveying pipe 11 to achieve transverse conveyance of the material in the second transverse conveying pipe 11. The end of the second transverse conveying pipe 11 is connected to the silo 5. Specifically, the dust removal device 9 is a micro-electrostatic dust removal device or a bag dust removal device. As for the dust removal system, the present invention does not limit the specific structure and number of dust removal hoods and dust removal conveying pipes. For the dust removal hood, the designer sets the dust removal hood according to the part of the high carbon ferrochrome online screening equipment where dust is prone to occur, and the dust removal conveying pipe is designed according to the setting of the dust removal hood, so as to transport the dust to the dust removal device 9 for dust separation and collection. In the present invention, the setting height of the dust removal device 9 is higher than the setting height of the silo 5, and the setting height of the second horizontal conveying pipe 11 is higher than the setting height of the silo 5; the end of the second horizontal conveying pipe 11 is provided with a third vertical pipe, and the third vertical pipe is connected to the silo 5. In the present invention, the horizontal conveying pipe (including the first horizontal conveying pipe and the second horizontal conveying pipe) is a long straight pipe structure, preferably a complete long straight round pipe (not segmented), the horizontal conveying pipe is arranged horizontally, a power device is installed at one end, a spiral rod is arranged in the pipe, and the spiral rod is driven to rotate by the power device, and the material in the pipe can be driven to the other end of the horizontal conveying pipe under the rotation of the spiral rod. The vertical pipes (including the first vertical pipe, the second vertical pipe and the third vertical pipe) all adopt a multi-section structure, that is, they are composed of multiple pipe sections, so that the pipeline wiring of the vertical pipes can be set according to the on-site construction conditions. No matter how many pipe sections are assembled from the vertical pipe, the whole should remain in a vertical setting state.

[0045] 7. Video monitoring system. The video monitoring system includes a camera, a signal line for transmitting video signals, and a monitor. The monitor is installed in the monitoring room. The camera is installed at the location where monitoring is required, such as at the silo. The video monitor is used to monitor whether there are vehicles entering or leaving the silo, whether the vehicle is parked in place, and the silo discharge status. In this way, remote control of the silo operation is achieved. When multiple cameras and multiple monitors are set, how to achieve the connection between the camera, the monitor and the monitoring server can adopt the existing technology, which will not be elaborated here.

[0046] 8. High-pressure purge system. The high-pressure purge system includes a high-pressure gas source (such as a high-pressure air pump) and a purge nozzle. The high-pressure gas source is connected to the purge nozzle through a pipeline. The purge nozzle is set corresponding to the vibrating screen. The purge nozzle can be fixed on the vibrating screening device through a bracket. The purge nozzle can also be a handheld structure and can be operated by the operator. The high-pressure purge system is used to purge the vibrating screen with high-pressure airflow before the vibrating screening device is turned on.

[0047] The specific embodiments of the present invention are as follows:

[0048] The high carbon ferrochrome online screening equipment provided by the present invention is newly built based on the existing transfer building, and its main added facilities are: two sets of diverter valves that can realize remote control, two sets of vibrating screening devices 4, one set of conveying system 6 (belt conveyor), two hoppers, one set of silo 5 and bracket (including foundation), one set of discharge valve, one set of micro-static or bag dust removal environmental protection equipment system, one set of electric gate (electric ash discharge valve), two pipeline valves, wear-resistant steel plate chute, one set of access to the operation room automatic control system, two sets of monitoring camera systems, and one set of discharge control system. After the materials to be screened are screened, the screened materials are output from the vibrating screening output end through vibration and then transported away by a belt conveyor. The screened materials are collected into the silo 5 through a pipeline. The bottom of the silo 5 is provided with a remote and local control system (which can realize both remote control and local control), and the collected materials (small particle materials and / or powdery materials) are loaded onto a car and transported away. The vibrating screening device 4 vibrates in advance and uses compressed air to blow the screen before each startup, which can automatically clean the mesh. In addition to screening ferrochrome, the present invention can still normally transport lime and mineral raw materials. A micro-static or bag dust removal environmental protection system (i.e., the dust removal system of the present invention) is added to ensure that the production process is environmentally friendly and safe.

[0049] As can be seen from the above, the present invention provides an online screening device for high carbon ferrochrome. In the present invention, the online screening device for high carbon ferrochrome includes: a material diversion device 1, a diversion valve is arranged in the material diversion device 1, and the material transportation is diverted by the diversion valve. The material diversion device 1 includes a first diversion path 2 for directly outputting the material to participate in production, and the material diversion device 1 includes a second diversion path 3 for outputting the material to the screening process; a vibration screening device 4 is connected with the second diversion path 3, and is used to receive the material that needs to be vibrated and screened and vibrate and screen it. The large particle material screened by the vibration screening device 4 is directly output to participate in production, and the small particle material and / or powder material screened by the vibration screening device 4 is transported to the downstream equipment through the pipeline system; the downstream equipment includes a silo 5, and the silo 5 is overhead, which is used to collect the screened small particle material and / or powder material and can discharge the material in a controlled manner.

[0050] Through the above structural design, the present invention is provided with a material diversion device 1 that can divert materials that need to be screened and materials that do not need to be screened, thereby ensuring the normal operation of the original system. The materials that need to be screened are diverted and then vibrated and screened by a vibrating screening device 4 to separate the materials from the screened materials and the materials that are under the screen. Different types of materials can be subjected to different subsequent treatments. The present invention improves the utilization rate of high-carbon ferrochrome, avoids the waste of small and medium-sized particle powders of high-carbon ferrochrome, and reduces production and operation costs. In addition, the high-carbon ferrochrome online screening equipment provided by the present invention is a newly added equipment based on the existing structure, which can not affect the original ore raw material transportation channel, and at the same time can realize the screening of high-carbon ferrochrome, as well as the functions of collecting, transporting, storing, and dust removal of powder after screening.

[0051] The present invention adopts a vibrating screening device 4 to screen the materials that need to be screened. The screened material (high carbon ferrochrome with a diameter greater than 5 mm) is transported to the smelting furnace by a belt conveyor; the screened material (high carbon ferrochrome with a diameter less than 5 mm) is collected into the silo 5 through a pipeline. There is a remote control system at the bottom of the silo 5 to discharge the powder into a car for transportation and subsequent smelting. In the prior art, the inherent equipment in the transfer station includes: two high-angle belt conveyors, chutes, dust removal pipelines and other equipment and facilities, which can be used for the transportation of lime, ferrochrome, and mineral raw materials. Taking the daily processing capacity of 1,000 tons of ferrochrome as an example, the screened material after screening is transported away by an existing belt conveyor; the screened material (ferrochrome powder) is a maximum of 5 mm (preliminary) and is collected in the silo 5, so the storage capacity of the silo 5 is not less than 50 tons.

[0052] The raw materials lime, ore raw materials and ferrochrome are transported to the material diversion device 1 24 meters above the ground by the existing high-angle belt conveyor. A remote-controlled diversion valve is installed inside the material diversion device 1. The function of the diversion valve is to divert the ferrochrome material to be screened to the vibrating screen and divert the lime or ore raw materials to the belt conveyor. The vibrating screening device 4 is installed at a working layer 20 meters above the ground. The ferrochrome material passes through the vibrating screen to separate ferrochrome particles and powder. In the present invention, the vibrating screening device 4 is provided with two sets. The ferrochrome particles screened by the front vibrating screening device 4 fall to the existing belt conveyor through the chute (the chute is between the vibrating screening device 4 and the conveying belt conveyor), and the ferrochrome particles of the rear vibrating screening device 4 are transported to the existing belt conveyor through a new belt conveyor and sent away together. After the powder of the front vibrating screening device 4 is collected, it falls into the silo 5 through a special chute; after the powder of the rear vibrating screening device 4 is collected, it falls into the silo 5 through the same chute. There is a remote and local control discharge system at the bottom of the silo 5. The present invention adds a micro-static or bag dust removal environmental protection system to ensure that the production process is environmentally friendly and safe. The present invention can recycle high-chromium powder through online high-chromium screening facilities to reduce production costs. The powder after online screening can be directly transported to the storage bin through a pipeline, without the need for multiple transshipments, reducing process losses. Online screening has a high degree of automation and control, and does not require additional positions, reducing labor cost expenditures. After the project is added, the dust generated by screening is processed to effectively avoid polluting the environment and endangering the health of employees.

[0053] Based on the above-mentioned high-carbon ferrochrome online screening equipment, the present invention also provides a high-carbon ferrochrome online screening method, which includes: step 1, roughly classifying the same kind of material, and roughly classifying to form materials that need to be screened and materials that do not need to be screened; step 2, conveying the same kind of materials after the rough classification to the material diversion device for diversion, the materials that do not need to be screened directly participate in the production after passing through the first diversion path, and the materials that need to be screened are conveyed to the vibration screening device after passing through the second diversion path; step 3, screening the material through the vibration screening device and obtaining the screened material and the screened material, the screened material is directly involved in the production through the conveying system, and the screened material is conveyed to the silo for storage and standby. Specifically, in step 2, the particle size of the screened material is greater than 5mm, and the particle size of the screened material is not greater than 5mm.

[0054] like Figure 4As shown, the present invention firstly roughly classifies the same material. Rough classification is to distinguish the materials according to the subjective consciousness of the technicians. For example, for the stacked materials (high carbon ferrochrome), the slag and powder of the materials on the upper part of the pile are very small. Such materials can directly participate in the production and are marked as materials that do not need screening. However, the slag and powder of the materials on the lower part of the pile are more. Such materials need to be screened and are marked as materials that need screening. After the materials are roughly classified, the materials of the same kind are conveyed to the material diversion device 1 for diversion through the existing belt conveyor. The materials that do not need to be screened are conveyed to the conveying system through the diversion of the first diversion path, and then directly participate in the production through the transportation of the conveying system. The materials that need to be screened are diverted through the second diversion path and enter the vibration screening device for vibration screening. The aperture of the vibration screen of the vibration screening device is set to 5mm. Among the screened materials, the particle size of the screened material is 5mm, and the particle size of the screened material is not more than 5mm. The screened material "flows" to the conveying system under the action of vibration on the vibration screen to participate in the production, and the screened material enters the silo through the pipeline system for standby.

[0055] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high carbon ferrochrome online screening device, characterized in that: include: A material diverting device (1), wherein a diverting valve is arranged in the material diverting device, and the material delivery is diverted by the diverting valve, the material diverting device comprises a first diverting path (2) for directly outputting the material and participating in production, and the material diverting device comprises a second diverting path (3) for outputting the material to a vibration screening process; A vibration screening device (4) connected to the second branch flow path, used to receive materials to be vibrated and screened and vibrate the materials, the large particles screened by the vibration screening device are directly output to participate in production, and the small particles and / or powdered materials screened by the vibration screening device are transported to downstream equipment through a pipeline system; The downstream equipment includes a silo (5), which is an overhead structure and is used to collect the screened small particle materials and / or powdery materials and can discharge the materials in a controlled manner.

2. The high carbon ferrochrome online screening equipment according to claim 1, characterized in that: The material diverter device comprises a diverter device feed port, a diverter fluid is arranged below the diverter device feed port, the diverter valve is arranged in the diverter fluid, and the diverter fluid is connected with the first diverter path and the second diverter path.

3. The high carbon ferrochrome online screening equipment according to claim 2, characterized in that: The material flow dividing device is provided with at least two, which are used for flow dividing of different materials; The second diversion paths of all the material diversion devices are connected.

4. The high carbon ferrochrome online screening equipment according to claim 1, characterized in that: A conveying system (6) is connected to the first diversion path and is used to output the diverted material and / or the screened large particle material and participate in the production; The vibrating screening device comprises a vibrating screen mesh, and the vibrating screen mesh comprises a vibrating screening output end and a bottom collecting bin (7), wherein the vibrating screening output end is connected to the conveying system and is used to output the screened large particle materials to the conveying system, and the bottom collecting bin is used to collect and transfer the screened small particle materials and / or powdered materials.

5. The high carbon ferrochrome online screening equipment according to claim 4, characterized in that: The pipeline system comprises a first transverse conveying pipe (8), in which a screw conveying device is arranged for realizing transverse conveying of materials in the first transverse conveying pipe, the first transverse conveying pipe is arranged below the vibrating screening device and above the silo, and the first transverse conveying pipe is connected to the bottom collecting bin via a first vertical pipe; The end of the first transverse conveying pipe is connected to a second vertical pipe, and the second vertical pipe is communicated with the silo.

6. The high carbon ferrochrome online screening equipment according to any one of claims 1 to 5, characterized in that: The invention also includes a dust removal system, which includes a dust removal device (9), a dust removal conveying pipe, and a dust hood which is arranged at a dust generating location of the equipment or at a connection between equipments. The dust removal device is used to collect dust. The dust removal device is connected to the dust hood via the dust removal conveying pipe. The dust removal device is connected to the silo and is used to convey the collected dust to the silo.

7. The high carbon ferrochrome online screening equipment according to claim 6, characterized in that: A dust collecting bin (10) is provided at the bottom of the dust removing device, a second transverse conveying pipe (11) is connected to the bottom opening of the dust collecting bin, a screw conveying device is provided in the second transverse conveying pipe for realizing transverse conveying of the material in the second transverse conveying pipe, and the end of the second transverse conveying pipe is connected to the silo.

8. The high carbon ferrochrome online screening equipment according to claim 7, characterized in that: The dust removal device is installed at a higher height than the silo, and the second transverse conveying pipe is installed at a higher height than the silo; A third vertical pipe is provided at the end of the second horizontal conveying pipe, and the third vertical pipe is communicated with the silo.

9. A high carbon ferrochrome online screening method, characterized in that: Screening the material using the high carbon ferrochrome online screening device as described in any one of claims 1 to 8; The high carbon ferrochrome online screening method comprises: Step 1: roughly classify the same material to form materials that need to be screened and materials that do not need to be screened; Step 2: transport the same type of materials after rough classification to the material diversion device for diversion. The materials that do not need to be screened directly participate in the production after passing through the first diversion path, and the materials that need to be screened are transported to the vibration screening device after passing through the second diversion path; Step 3: The material is screened by a vibrating screening device to obtain the oversize and undersize materials. The oversize materials are directly transported to the production through the conveying system, and the undersize materials are transported to the silo for storage and standby.

10. The high carbon ferrochrome online screening method according to claim 9, characterized in that: In the step 2, the particle size of the material on the sieve is greater than 5 mm, and the particle size of the material under the sieve is not greater than 5 mm.

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