CN-122015500-A - Automatic bedding material feeding and weighing and feeding control method and system for belt sintering machine

CN122015500ACN 122015500 ACN122015500 ACN 122015500ACN-122015500-A

Abstract

The invention provides a method and a system for automatic feeding and weighing feeding of a base material of a belt sintering machine, which are characterized in that real-time weight data of the base material in each storage bin are continuously acquired based on weighing sensors arranged at bearing supporting points of at least two parallel base material storage bins, anti-interference processing is carried out on the real-time weight data, signal fluctuation caused by on-site working conditions is eliminated, the real-time weight data after the anti-interference processing is used as a sole decision basis for feeding control, the real-time weight data and a preset feeding weight lower limit are compared, a target feeding bin is automatically judged, a distributing device is controlled to switch a base material conveying path to the target feeding bin, the running state of a feeding executing mechanism is continuously regulated in a closed loop mode by taking the real-time weight data after the anti-interference processing as feedback quantity in the feeding process of the target feeding bin until the real-time weight data reaches a preset feeding target value, and the feeding target value is lower than the physical capacity limit of the storage bin.

Inventors

CHEN XIONGBO
LI JIE
WU SHENGFENG

Assignees

宝武集团鄂城钢铁有限公司

Dates

Publication Date: 20260512
Application Date: 20260326

Claims (10)

1. A method for controlling automatic feeding and weighing of base material of a belt sintering machine is characterized by comprising the following steps: based on weighing sensors arranged at each bearing supporting point of at least two parallel-connected bedding material storage bins, continuously acquiring real-time weight data of bedding materials in each storage bin, performing anti-interference treatment on the real-time weight data, and eliminating signal fluctuation caused by on-site working conditions; The real-time weight data after the anti-interference treatment is used as a unique decision basis for material supplementing control, the real-time weight data is compared with a preset lower limit of the weight of the material supplementing, a target material supplementing bin is automatically judged, and a material distributing device is controlled to switch a bedding material conveying path to the target material supplementing bin; and continuously taking the real-time weight data subjected to anti-interference treatment as feedback quantity to adjust the running state of the feeding execution mechanism in a closed loop manner in the feeding process of the target feeding bin until the real-time weight data reaches a preset feeding target value, and stopping feeding until the feeding target value is lower than the physical capacity limit of the storage bin.
2. The method for automatically feeding the base material into the bin and controlling weighing and feeding the base material into the bin according to claim 1, wherein the anti-interference processing is a composite filtering processing, wherein the jump abnormal weight data caused by material impact and equipment vibration are removed through amplitude limiting filtering, and then the effective weight data after amplitude limiting filtering is smoothed through moving average filtering.
3. The automatic feeding and weighing feeding control method for the base material of the belt sintering machine according to claim 1, wherein when real-time weight data of two or more storage bins are lower than a preset feeding weight lower limit, feeding of the target feeding bins is judged and executed in sequence according to a preset feeding priority sequence of the storage bins or a sequence of the real-time weight data from low to high, when a feeding device is controlled to switch a conveying path, each discharge port of the feeding device executes mutually exclusive output logic, only a single discharge port is conducted under any working condition, switching action is required to be executed after a previous feeding process is completely stopped, a corresponding feeding executing mechanism is stopped and the base material in the conveying path is emptied, and the time interval of the two switching actions is not smaller than a preset minimum switching time interval.
4. The automatic feeding and weighing feeding control method for the bed charge of the belt sintering machine according to claim 1, wherein the operation state of the closed-loop adjustment feeding execution mechanism is specifically that a feeding approaching threshold value lower than a feeding target value is preset, when the difference value between the real-time weight data of the target feeding bin and the feeding target value is larger than the feeding approaching threshold value, the feeding execution mechanism is controlled to operate in a high-speed mode, and when the real-time weight data of the target feeding bin reaches the feeding approaching threshold value, the feeding execution mechanism is controlled to switch to operate in a low-speed mode.
5. The automatic feeding and weighing feeding control method for the bed charge of the belt sintering machine according to claim 1, wherein the feeding flow closed-loop control is further executed in the feeding process, the actual feeding quantity of the bed charge conveying belt is obtained in real time, the preset feeding flow set value is compared, the opening degree of a feeding flashboard is automatically adjusted, the actual feeding quantity is stabilized within the feeding flow set value range, the upper limit of the feeding weight higher than a feeding target value is preset, when the real-time weight data of a storage bin reaches the upper limit of the feeding weight, an emergency stop command is immediately triggered to stop the operation of corresponding equipment, and meanwhile, the main power supply of a corresponding feeding executing mechanism is cut off through a hard-wire emergency stop signal loop independent of a control flow.
6. Automatic feeding and weighing and feeding control system for bedding materials of belt sintering machine, which is characterized in that: The automatic feeding device comprises at least two bedding material storage bins, a material distributing device, a material supplementing executing mechanism and a controller, wherein each bearing supporting point of each group of storage bins is provided with a weighing sensor in signal connection with the controller, the material distributing device is used for switching a conveying path of bedding materials to any storage bin, the material supplementing executing mechanism is correspondingly configured with each storage bin, and the controller is respectively in signal connection with each weighing sensor, the material distributing device and the material supplementing executing mechanism; the controller is configured to receive weight signals of the weighing sensors and execute anti-interference processing to obtain real-time weight data of the storage bins, compare the real-time weight data after the anti-interference processing with a preset lower limit of the feeding weight by taking the real-time weight data after the anti-interference processing as a sole decision basis of feeding control, automatically judge a target feeding bin and control the feeding device to switch to a corresponding conveying path, control the feeding executing mechanism to feed the target feeding bin, and continuously adjust the running state of the feeding executing mechanism in a closed loop by taking the real-time weight data of the target feeding bin as feedback quantity in the feeding process until the real-time weight data reaches the preset feeding target value, and control the feeding of the feeding executing mechanism to stop until the real-time weight data reaches the preset feeding target value, wherein the feeding target value is lower than the physical capacity limit of the storage bin.
7. The automatic bedding material feeding and weighing and feeding control system of the strand sintering machine according to claim 6, wherein the controller is internally provided with a composite filtering processing unit, and the composite filtering processing unit is configured to remove jump abnormal weight data caused by material impact and equipment vibration through amplitude limiting filtering, and then smooth the effective weight data after amplitude limiting filtering through moving average filtering.
8. The automatic feeding and weighing and feeding control system for the bottom materials of the belt sintering machine according to claim 6, wherein the controller is internally provided with a target bin judging and feeding control unit, the target bin judging and feeding control unit is configured to judge and execute the feeding of the target bin according to the preset feeding priority order of the storage bins or the order of the real-time weight data from low to high when the real-time weight data of two or more storage bins are lower than the preset feeding weight lower limit, and control the feeding device to switch the conveying path, when the feeding device switches the conveying path, each discharge port of the feeding device executes the exclusive output logic, only a single discharge port is conducted under any working condition, the switching action is required to be executed after the previous feeding process is completely stopped, the corresponding feeding executing mechanism is stopped, the bottom materials in the conveying path are emptied, and the time interval between the two switching actions is not smaller than the preset minimum switching time interval.
9. The automatic feeding and weighing and feeding control system for the bed charge of the belt sintering machine according to claim 6, wherein the controller is internally provided with a feed adjusting unit, the feed adjusting unit is configured to preset a feed approaching threshold value lower than a feed target value, control the feed executing mechanism to operate in a high-speed mode when the difference value between the real-time weight data of the target feed bin and the feed target value is larger than the feed approaching threshold value, and control the feed executing mechanism to switch to operate in a low-speed mode when the real-time weight data of the target feed bin reaches the feed approaching threshold value.
10. The automatic bedding material feeding and weighing and feeding control system of the belt sintering machine, which is disclosed in claim 6, is characterized in that the feeding executing mechanism comprises a feeder, a bedding material conveying belt and a feeding flashboard, wherein the feeder, the bedding material conveying belt and the feeding flashboard correspond to each storage bin, a belt electronic scale connected with a controller in a signal mode is installed at the head end of the bedding material conveying belt, a flow closed-loop control unit is arranged in the controller and used for receiving the actual blanking amount of the belt electronic scale and adjusting the opening of the feeding flashboard in a closed-loop mode, a hard-wire emergency stop signal loop independent of the controller is further arranged, the triggering end of the hard-wire emergency stop signal loop is connected with a weighing transducer matched with a weighing sensor, and the executing end of the hard-wire emergency stop signal loop is connected with a main power supply loop of the feeding executing mechanism.

Description

Automatic bedding material feeding and weighing and feeding control method and system for belt sintering machine Technical Field The invention belongs to the technical field of automatic control of metallurgical sintering production, and particularly relates to a method and a system for automatic feeding of a base material and weighing and feeding control of a belt sintering machine. Background The belt type sintering machine is core main equipment of a modern ferrous metallurgy sintering process, the continuity, stability and finished product quality of sintering production directly determine the raw material supply efficiency, smelting stability and comprehensive energy consumption level of a subsequent blast furnace ironmaking process, and a bedding system is used as a key component part of a trolley material distribution link of the sintering machine, so that the belt type sintering machine is an important foundation for guaranteeing the complete flow of sintering production. Before the sintering machine trolley operates, the bedding material is uniformly paved on the trolley grate bars to form a material layer with a certain thickness, and then the mixture to be sintered is paved on the bedding material, and in the subsequent ignition and air draft sintering processes, the bedding material is always positioned between the mixture layer and the trolley grate bars, so that the sintering machine trolley is a key buffer barrier between a sintering high-temperature zone and an equipment body. The bedding material is usually sinter of specific granularity range selected from the sintering product screening system, the granularity is generally required to be controlled to be about 10-18mm in industry, the laying thickness on the trolley is stabilized at 45-50 mm, the granularity of the bedding material is proper, the laying thickness is stable, the overall air permeability of the sinter bed can be effectively improved, the ventilation air flow in the sintering process can more uniformly penetrate through the sinter bed, the ore forming process of the sinter is promoted, the sintering speed, the sintering rate and the production efficiency are improved, and meanwhile, adverse effects on the core metallurgical properties such as the reducibility, the low-temperature reduction powdering property and the soft-melting property of the sinter are avoided. With the wide popularization of high-material layer sintering technology in the modern steel industry, the thickness of a sintered material layer is continuously improved, the duration of a high-temperature zone in the sintering process is longer, the highest working temperature is higher, more stringent requirements are also put on the protection performance, the supply continuity and the laying uniformity of the bedding material, and once the supply of the bedding material fluctuates and is interrupted, a series of production and equipment problems can be directly caused. The stable and qualified bedding material is characterized in that the core effect is concentrated in a plurality of core dimensions, firstly, the protection effect on sintering core equipment is realized, the sintering high-temperature zone is effectively blocked from being directly contacted with the grate bars of the trolley, deformation and burning loss of the grate bars due to long-term high-temperature erosion are avoided, the service life of the grate bars is greatly prolonged, meanwhile, fine powder in mixed materials can be blocked from entering a main exhaust system along with exhaust air flow, the scouring abrasion of fine powder on an exhaust fan rotor is reduced, the service life of an exhaust fan core part is prolonged, secondly, the optimization and improvement effect on the sintering process is realized, the fine powder is effectively prevented from being pumped away from gaps of the grate bars, the dust content of sintering waste gas and the operation load of a rear end dust removal system are reduced, meanwhile, the blocking and bonding of the fine powder and the sintering ore are avoided, the effective exhaust area of the grate bars is always kept stable, the air flow distribution in a sintering material layer is uniform, the porous structure formed by coarse particle bedding material can be further enhanced, the high-efficiency and stable performance of the sintering process is promoted, in addition, the site operation condition is remarkably improved, the problem of the special operation of the grate bars is solved, and the site operation is also carried out by the special operation of the trolley is relieved, and the site operation is free from the problem of the special carrier is solved. In actual industrial production, the stable supply of the bedding material highly depends on the material level control and the material supplementing control of a storage bin, and at present, the bedding material storage bin of most sintering production lines in the industry adopts tradi