An improved method for a base material grading distribution system

Abstract

The present invention discloses an improved method for a base material grading distribution system, and relates to the technical field of sintering production. The improved method for the base material grading distribution system is specifically operated as follows: wherein, the main equipment is as follows: including a base material feeding gate, a base material conveying belt, a base material weighing device, a base material ore trough, a base material ore trough weighing device, a base material feeding device, a base material grading device, a base material layer thickness measuring instrument, a sintering machine trolley, and a base material system PID control system. The improved method for the base material grading distribution system utilizes a grading distribution method on the plane of the sintering machine trolley to realize a segregated distribution method of the base material, and screens and grades the base material of 10-20mm particle size during the distribution process, thereby meeting the heat insulation and air permeability of the sintering system, and effectively preventing the small particles of the base material from being drawn away. The system has the characteristics of simple design, convenient operation, and convenient use and maintenance.

Description

Technical Field

[0001] The invention relates to the technical field of sintering production, in particular to an improved method for a base material grading distribution system. Background Art

[0002] In sintering production, after crushing, sintered ore is usually processed by three-stage screening. The particle size after screening is divided into particle size larger than 20mm, particle size between 10 and 20mm, particle size between 5 and 10mm, and particle size smaller than 5mm. Among them, sintered ore with particle size smaller than 5mm is all used as return ore, and particle size between 10 and 20mm is used as sintering base material to protect the grate bars and body of the sintering machine trolley.

[0003] The gap between the grate bars on the plane of the sintering machine trolley is controlled at about 6mm according to the process requirements. After burning, the gap between the grate bars will be greater than 6mm and reach a maximum of 10mm. At this time, a part of the 10-20mm particle size bottom material will leak through the gap between the grate bars to the flue system, increasing the load of the flue ash removal equipment; because part of the bottom material will reduce the thickness of the bottom material layer after flowing down, the protective ability of the bottom material for the grate bars of the sintering machine trolley is reduced, increasing the burning of the grate bars and the wear of the trolley body.

[0004] In the utility model patent CN 210135774 U type sintering bottom material process optimization and addition technical equipment, and the invention patent CN 110132013 A type sintering bottom material process optimization and addition technical equipment, the utility model discloses a sintering bottom material process optimization and addition technical equipment, including a first silo and a second silo for spreading sintered ore on the plane of a trolley, and a screening device for screening the sintered ore. After screening by the screening device, large particles on the sieve fall into the first silo, and small particles under the sieve fall into the second silo. The first silo and the second silo are arranged in sequence along the running direction of the trolley plane, so that the large-particle sintered ore in the first silo is first spread on the plane of the trolley, and then the small-particle sintered ore in the second silo is spread on the large-particle sintered ore. By using a bottom-laying method with larger particles at the bottom and smaller particles at the top on the trolley plane, a portion of the sintered ore with a particle size of 5 to 12 mm that was originally to be added to the blast furnace is used as the sintering bottom, so as to reduce the sintered ore with a particle size of less than 10 mm added to the furnace. While meeting the requirements of heat insulation and air permeability of the sintering system, it effectively prevents small-particle sintering materials from being drawn away, thereby reducing the content of particles smaller than 10 mm in the sintered ore added to the furnace.

[0005] Both it and the patent of the present invention use graded distribution of bottom material, but the particle level, grading method and invention purpose used are different from those of this patent. The main function of this patent is to stabilize the particle composition level of the sintered finished ore, stabilize the thickness of the bottom material, use graded distribution to reduce the loss of the bottom material and protect the grate bars, and use various components to realize PID automatic control. Summary of the invention

[0006] 1. Technical issues to be resolved

[0007] In view of the deficiencies in the prior art, the present invention provides an improved method for a base material grading distribution system, which solves the problems existing in the prior art.

[0008] (II) Technical solution

[0009] To achieve the above objectives, the present invention is implemented through the following technical solutions: an improved method for a base material grading distribution system, the specific operations are as follows:

[0010] Among them, the main equipment is as follows:

[0011] It includes a bed material feeding gate, a bed material conveying belt, a bed material weighing device, a bed material ore trough, a bed material ore trough weighing device, a bed material feeding device, a bed material grading device, a bed material layer thickness measuring instrument, a sintering machine trolley, and a bed material system PID control system; wherein the bed material feeding device includes a bed material feeding electric gate valve, a bed material feeding electric gate valve, and a bed material feeding collecting hopper; the bed material grading device includes a bed material grading screen body, a bed material grading screen, and an electric vibrator;

[0012] The specific operations of the improvement are as follows:

[0013] A feed control gate is installed at the tail of the bed material conveyor belt. After the bed material system is started, the hourly flow of the bed material is measured by a weighing device. After the bed material starts to be conveyed, the material level of the bed material trough is measured according to the weighing device set on the bed material trough, and the material level signal is transmitted to the bed material system PID control system. The bed material trough position is manually set in the bed material system PID control system. The bed material flow automatically controls the bed material feed control gate according to the trough material level, and controls the bed material flow, thereby achieving the purpose of stabilizing the bed material flow, so as to stabilize the particle level of the sintered finished ore.

[0014] After the bed material hopper receives the material, the electric gate for feeding the bed material is gradually opened. The electric gate is divided into two in the horizontal direction of the sintering machine, each controlling the thickness of the bed material layer on both sides. After the feeding electric gate feeds the material, it enters the bed material feeding hopper for temporary storage of the bed material. The lower edge of the feeding hopper is designed to be 18°, which is larger than the accumulation angle of the bed material to meet the automatic sliding of the bed material. After the bed material is evenly laid on the sintering machine trolley, the bed material layer thickness meter measures the layer thickness signal and feeds it back to the bed material system PID control system. The PID control system of the bed material system is manually controlled. The control system sets the thickness of the bed material. The bed material feeding gates 1 and 2 automatically control the bed material feeding control gates according to the measured layer thickness on both sides to control the bed material flow rate, thereby achieving the purpose of stabilizing the bed material layer thickness. To verify the layer thickness, the bed material hourly flow rate, the length and width of the sintering machine trolley, the running speed of the sintering machine and other data are used to calculate the bed material thickness. The two sets of data correspond to each other to ensure the stability of the bed material thickness. The calculation formula is as follows: bed material thickness = bed material hourly flow rate / (sintering machine trolley width*sintering machine trolley length*sintering machine hourly speed);

[0015] The bottom material grading device is used to grade the bottom material. The spacing of the bottom material grading screen is 15mm. The bottom material grading screen is started and the bottom material feeding and collecting hopper begins to discharge the material. According to the screening effect of the grading screen, the bottom material with a particle size of >15mm is arranged at the bottom of the sintering machine trolley in advance, and the particle size of <15mm is arranged at the upper part of the bottom material of the bottom material. The electric vibrator in the bottom material grading screen is arranged on the grading screen body, and the grading screen is reversely arranged on the sintering machine trolley, and the lower part of the grading screen is 200mm higher than the grate bars of the sintering machine trolley.

[0016] (III) Beneficial effects

[0017] The present invention provides an improved method for a base material grading distribution system, which has the following beneficial effects:

[0018] The improved method of the base material graded distribution system utilizes the graded distribution method on the plane of the sintering machine trolley to realize the segregated distribution method of the base material, and the base material with a particle size of 10-20 mm is screened and graded during the distribution process, thereby effectively preventing the small particles of the base material from being drawn away while meeting the requirements of heat insulation and air permeability of the sintering system. The system is simple in design, easy to operate, and easy to use and maintain.

[0019] The grading distribution of the base material is realized, with large particles located at the bottom layer and small particles located at the upper layer, solving the technical problem of uneven distribution of particle sizes of the existing base material distribution;

[0020] A base material thickness detection and base material flow balance system has been designed, which can effectively control the base material system to run smoothly and stably, solving the problem of no base material thickness detection and manual flow control.

[0021] The bed material is distributed in grades to reduce leakage of small particles, protect the grate bars and body of the sintering trolley, and reduce the equipment load of the sintering flue ash unloading system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a process layout diagram of the base material grading system of the present invention;

[0023] Figure 2 This is a layout diagram of the bed material feeding and grading system of the present invention;

[0024] Figure 3 This is a program control diagram of the base material grading system of the present invention;

[0025] Figure 4 This is a program diagram for stabilizing the thickness of the base material layer according to the present invention. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] See also Figure 1-4 The present invention provides a technical solution: an improved method for a base material grading distribution system, the specific operation is as follows:

[0028] Among them, the main equipment is as follows:

[0029] It includes a bed material feeding gate 1, a bed material conveying belt 2, a bed material weighing device 3, a bed material ore trough 4, a bed material ore trough weighing device 5, a bed material feeding device 6, a bed material grading device 7, a bed material layer thickness measuring instrument 8, a sintering machine trolley 9, and a bed material system PID control system 10; wherein the bed material feeding device 6 includes a bed material feeding electric gate valve 11, a bed material feeding electric gate valve 12, and a bed material feeding collecting hopper 13; the bed material grading device 7 includes a bed material grading screen body 14, a bed material grading screen 15, and an electric vibrator 16;

[0030] The specific operations of the improvement are as follows:

[0031] A feed control gate is installed at the tail of the bed material conveyor belt. After the bed material system is started, the hourly flow of the bed material is measured by a weighing device. After the bed material starts to be conveyed, the material level of the bed material trough is measured according to the weighing device set on the bed material trough, and the material level signal is transmitted to the bed material system PID control system. The bed material trough position is manually set in the bed material system PID control system. The bed material flow automatically controls the bed material feed control gate according to the trough material level, and controls the bed material flow, thereby achieving the purpose of stabilizing the bed material flow, so as to stabilize the particle level of the sintered finished ore.

[0032] After the bed material hopper receives the material, the electric gate for feeding the bed material is gradually opened. The electric gate is divided into two in the horizontal direction of the sintering machine, each controlling the thickness of the bed material layer on both sides. After the feeding electric gate feeds the material, it enters the bed material feeding hopper for temporary storage of the bed material. The lower edge of the feeding hopper is designed to be 18°, which is larger than the accumulation angle of the bed material to meet the automatic sliding of the bed material. After the bed material is evenly laid on the sintering machine trolley, the bed material layer thickness meter measures the layer thickness signal and feeds it back to the bed material system PID control system. The PID control system of the bed material system is manually controlled. The control system sets the thickness of the bed material. The bed material feeding gates 1 and 2 automatically control the bed material feeding control gates according to the measured layer thickness on both sides to control the bed material flow rate, thereby achieving the purpose of stabilizing the bed material layer thickness. To verify the layer thickness, the bed material hourly flow rate, the length and width of the sintering machine trolley, the running speed of the sintering machine and other data are used to calculate the bed material thickness. The two sets of data correspond to each other to ensure the stability of the bed material thickness. The calculation formula is as follows: bed material thickness = bed material hourly flow rate / (sintering machine trolley width*sintering machine trolley length*sintering machine hourly speed);

[0033] The bottom material grading device is used to grade the bottom material. The spacing of the bottom material grading screen is 15mm. The bottom material grading screen is started and the bottom material feeding and collecting hopper begins to discharge the material. According to the screening effect of the grading screen, the bottom material with a particle size of >15mm is arranged at the bottom of the sintering machine trolley in advance, and the particle size of <15mm is arranged at the upper part of the bottom material of the bottom material. The electric vibrator in the bottom material grading screen is arranged on the grading screen body, and the grading screen is reversely arranged on the sintering machine trolley, and the lower part of the grading screen is 200mm higher than the grate bars of the sintering machine trolley.

[0034] In summary, the improved method of the base material graded distribution system utilizes the graded distribution method on the plane of the sintering machine trolley to realize the segregated distribution method of the base material, and the base material with a particle size of 10-20 mm is screened and graded during the distribution process, thereby meeting the heat insulation and air permeability of the sintering system while effectively preventing the small particles of the base material from being drawn away. The system is simple in design, easy to operate, and easy to use and maintain.

[0035] The grading distribution of the base material is realized, with large particles located at the bottom layer and small particles located at the upper layer, solving the technical problem of uneven distribution of particle sizes of the existing base material distribution;

[0036] A base material thickness detection and base material flow balance system has been designed, which can effectively control the base material system to run smoothly and stably, solving the problem of no base material thickness detection and manual flow control.

[0037] The bed material is distributed in grades to reduce leakage of small particles, protect the grate bars and body of the sintering trolley, and reduce the equipment load of the sintering flue ash unloading system.

[0038] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An improved method for a base material grading distribution system, characterized in that: The specific operations are as follows: Among them, the main equipment is as follows: The invention comprises a bed material feeding gate (1), a bed material conveying belt (2), a bed material weighing device (3), a bed material ore trough (4), a bed material ore trough weighing device (5), a bed material feeding device (6), a bed material grading device (7), a bed material layer thickness measuring instrument (8), a sintering machine trolley (9), and a bed material system PID control system (10); wherein the bed material feeding device (6) comprises a bed material feeding electric gate valve (11), a bed material feeding electric gate valve (12), and a bed material feeding collecting hopper (13); and the bed material grading device (7) comprises a bed material grading screen body (14), a bed material grading screen (15), and an electric vibrator (16); The specific operations of the improvement are as follows: A feed control gate is installed at the tail of the bed material conveyor belt. After the bed material system is started, the hourly flow of the bed material is measured by a weighing device. After the bed material starts to be conveyed, the material level of the bed material trough is measured according to the weighing device set on the bed material trough, and the material level signal is transmitted to the bed material system PID control system. The bed material trough position is manually set in the bed material system PID control system. The bed material flow automatically controls the bed material feed control gate according to the trough material level, and controls the bed material flow, thereby achieving the purpose of stabilizing the bed material flow, so as to stabilize the particle level of the sintered finished ore. After the bed material hopper receives the material, the electric gate for feeding the bed material is gradually opened. The electric gate is divided into two in the horizontal direction of the sintering machine, each controlling the thickness of the bed material layer on both sides. After the feeding electric gate feeds the material, it enters the bed material feeding hopper for temporary storage of the bed material. The lower edge of the feeding hopper is designed to be 18°, which is larger than the accumulation angle of the bed material to meet the automatic sliding of the bed material. After the bed material is evenly laid on the sintering machine trolley, the bed material layer thickness meter measures the layer thickness signal and feeds it back to the bed material system PID control system. The PID control system of the bed material system is manually controlled. The control system sets the thickness of the bed material. The bed material feeding gates 1 and 2 automatically control the bed material feeding control gates according to the measured layer thickness on both sides to control the bed material flow rate, thereby achieving the purpose of stabilizing the bed material layer thickness. To verify the layer thickness, the bed material hourly flow rate, the length and width of the sintering machine trolley, the running speed of the sintering machine and other data are used to calculate the bed material thickness. The two sets of data correspond to each other to ensure the stability of the bed material thickness. The calculation formula is as follows: bed material thickness = bed material hourly flow rate / (sintering machine trolley width*sintering machine trolley length*sintering machine hourly speed); The bottom material grading device is used to grade the bottom material. The spacing of the bottom material grading screen is 15mm. The bottom material grading screen is started and the bottom material feeding and collecting hopper begins to discharge the material. According to the screening effect of the grading screen, the bottom material with a particle size of >15mm is arranged at the bottom of the sintering machine trolley in advance, and the particle size of <15mm is arranged at the upper part of the bottom material of the bottom material. The electric vibrator in the bottom material grading screen is arranged on the grading screen body, and the grading screen is reversely arranged on the sintering machine trolley, and the lower part of the grading screen is 200mm higher than the grate bars of the sintering machine trolley.

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