CN-122012845-A - Method for shortening feeding time of converter

CN122012845ACN 122012845 ACN122012845 ACN 122012845ACN-122012845-A

Abstract

The invention belongs to the technical field of metallurgical cranes, and discloses a method for shortening the feeding time of a converter, which comprises the steps of positioning a crane working position trolley (realizing rapid positioning and height pre-adjustment through a track beam installation trolley positioning mark, a factory building elevation and a waiting position installation infrared positioner), positioning the crane working position trolley (realizing accurate stopping and yielding before and after feeding through a box beam 3000mm position installation main trolley positioning mark), efficient collaborative dispatching of feeding straddling cranes (realizing real-time sharing of positions and loading states to an operation room picture through a safety guardrail installation electronic tag, a body installation reader-writer and a PLC) and feeding of the converter of the crane (realizing one-time accurate collaborative through time sequence matching of a waste steel hopper and a hot metal ladle, safe control of an angle distance and withdrawal yielding actions). The invention optimizes the same-span cooperative dispatching effect of the multi-crane, thereby shortening the whole feeding time of the converter and improving the operation rate and the productivity stability of the converter.

Inventors

TANG JIANHUA
DING ZHONGWEN
LIN JIAN
TU MINGZHAO
LIU XIANGDONG
XU XUEHUI
LIU LIHONG
ZHENG HAO
ZHU BENHUA
YANG QUAN
GAN LU
WANG LEI

Assignees

重庆钢铁股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260317

Claims (7)

1. A method for reducing the feed time of a converter comprising the steps of: The crane operation position cart positioning is realized by installing a scrap steel crane cart positioning mark on a crane track beam above a scrap steel pit scrap steel scale, installing a scrap steel bucket feeding height infrared positioner on a factory building elevation at a waiting position on the south side of a converter front platform, installing scrap steel crane converter feeding positioning marks on the crane track beams above all converters, installing a molten iron crane cart positioning mark on a crane track beam above a molten iron tank car track in a molten iron lifting hole area, installing a molten iron tank charging height infrared positioner on a molten iron crane waiting position, and installing a molten iron crane cart converter charging positioning mark on the crane track beam above all converters; The positioning of the crane operation position trolley is realized by installing a main trolley positioning mark of the scrap steel crane at the east side box girder position of the scrap steel crane, installing a main trolley positioning mark of the molten iron crane at the east side box girder position of the molten iron crane, and realizing the quick positioning and yielding of the positions of the scrap steel hoppers before and after the scrap steel is fed into the converter and the quick positioning and withdrawing of the positions of the molten iron tanks before and after the converter is fed with iron; the feeding cross crane high-efficiency collaborative scheduling is realized by installing crane track position positioning electronic tags on a feeding cross crane track beam western side safety barrier, installing crane track position positioning electronic tag readers on a feeding cross steel scrap crane and a feeding cross steel scrap crane body western side, installing a PLC (programmable logic controller) and related read-write equipment on each crane, transmitting the position and working state of each crane to a crane beam system terminal through a wireless transmitting device, transmitting the position and working state to a system host through optical fibers, and pushing the position and working state to computer pictures of each operating room system in a converter process; The method comprises the steps of feeding a crane converter, namely pre-aligning a steel scrap bucket to the converter before slag splashing and furnace protection are finished, keeping the height consistent with the steel scrap feeding angle of the converter, enabling the front edge of the steel scrap bucket to rapidly enter a furnace mouth when the steel scrap feeding angle is stopped by swinging the converter, enabling auxiliary hooks to be lifted up step by step, enabling a trolley to rapidly and Western out of the furnace mouth after entering, enabling the trolley to move in the north-south direction of a cart to be abducted, enabling auxiliary hooks of the molten iron crane to be close to trunnions and keep 300mm safe distance and iron Bao Gaodu consistent when the steel scrap is fed, enabling the alignment hooks of the molten iron crane to gradually approach after the steel scrap is withdrawn, enabling the converter to rapidly close and lift the auxiliary hooks step by step when the iron charging position is stopped, enabling a main trolley and the auxiliary trolley to rapidly and Western out of the furnace mouth to be matched in time sequence after the iron charging is finished, and realizing accurate cooperation and one-time completion of the feeding process.
2. The method according to claim 1, wherein in the positioning of the crane working position cart, the positioning marks of the molten iron crane cart are different in color and length, respectively correspond to two molten iron cranes with different cab positions, and are arranged on crane rail beams above three molten iron tank car rails of the molten iron lifting hole.
3. The method according to claim 1, wherein in the positioning of the crane working position trolley, a scrap steel crane main trolley positioning mark and a molten iron crane main trolley positioning mark are respectively arranged at 3000mm positions of east side box girders of respective north-south trolley cranes and are used for triggering the operation immediately after a feeding instruction arrives and triggering the yielding action after the feeding instruction exits.
4. The method of claim 1, wherein in the efficient collaborative dispatching of charging cross-crane, the number of the electronic tag readers for positioning the track positions of the crane is 3-5, the electronic tag readers are arranged on the west sides of the bodies of 2 scrap steel cranes and 2 molten iron cranes, and the PLC identifies the loading working state through a main hook and an auxiliary hook or an overload limiter.
5. The method of claim 1, wherein in the efficient collaborative dispatching of the charging cross-crane, the position and working state information transmission paths are PLC controller, wireless transmitting device, traveling beam system terminal, optical fiber, system host, and computer picture of each operation room system of the converter process, and the operation room personnel selects the optimal command path according to the picture in real time.
6. The method according to claim 1, wherein in the step of feeding steel scraps in the converter of the crane, the height of the steel scraps pipes in prealignment is consistent with the steel scraps feeding angle 65 DEG + -3 DEG of the converter, the bottom of the front end of each steel scraps feeding pipe is 100-300mm away from the lower mouth of the furnace mouth, and the cart rapidly moves to the north and south to yield when the front end of each steel scraps feeding pipe exits from the smoke gate 2000mm after the steel scraps feeding.
7. The method according to claim 1, wherein in the step of charging the converter feed of the crane, the converter is stopped by shaking to 48 ° ± 3 ° of the charging position, the ladle lower opening is kept about 300mm higher than the tapping opening lower opening during charging, the shaking speed is matched with the ladle charging speed, and the carriage can be started when the east side of the ladle exits from the smoke gate by about 2000 mm.

Description

Method for shortening feeding time of converter Technical Field The invention belongs to the technical field of metallurgical cranes, and particularly relates to a method for shortening the feeding time of a converter. Background The converter steelmaking is used as a core process of the production of a long-flow steel enterprise, the accurate and efficient feeding of molten iron and scrap steel directly influences the converter smelting rhythm, the heat balance and the overall productivity, and the crane is used as core equipment of a feeding link, so that the operation efficiency and the stability of the crane are one of key factors influencing the converter smelting period. In an employee experience operation mode, the time length fluctuation is easy to be caused by the problems of equipment difference, insufficient positioning precision of a crane, individual skills of employees and the like, and the method becomes one of main bottlenecks for restricting the improvement of the operation rate of the converter. At present, the converter process feeding operation in the metallurgical industry is still highly dependent on experience and proficiency of drivers, and has obvious technical bottlenecks that firstly, accurate coordination of a cart, a trolley and a lifting mechanism is difficult to realize by manual operation, secondly, long span lifting distance and high lifting height lead to long positioning time, the single-furnace feeding time level of a converter with more than 210 tons is 4-5 minutes, the single-furnace feeding time becomes a key bottleneck for restricting the converter productivity improvement, thirdly, the deviation of manual judgment is easy to cause excessive swinging of suspended matters, the risks of safety accidents such as splashing, slag spilling and steel scraps are increased, the abrasion of steel ropes is accelerated, thirdly, 3-5 cranes are different across most enterprises for feeding, an efficient coordination scheduling mechanism is lacked, running interference and waiting idle running time are easy to be generated, the feeding period is further prolonged, and the traditional operation mode has great fluctuation on working efficiency due to strong dependence on manpower, and is difficult to adapt to the development trend of quality improvement and efficiency and green safety in the steel industry. The existing crane operation method for converter feeding has the problems of low efficiency, high safety risk, insufficient control precision, poor cooperativity and the like, and the crane operation method capable of shortening the feeding time, improving the operation precision and the cooperativity is needed to break through the bottleneck of the prior art and meet the actual demands of current steel industry on decrement development, low steel expense, extreme cost, extreme efficiency and safety guarantee. Specifically, the time consumption of feeding of each furnace is prolonged due to inaccurate positioning caused by manual dependence, the operation rate of the converter is directly reduced, a plurality of cranes are frequently waited or interfered by cooperative deletion, periodic fluctuation is further amplified, safety is threatened due to excessive swinging, equipment maintenance cost is increased, the problems limit the stability of converter productivity and the improvement of the efficiency of the whole production line together, and therefore the prior art is highly required to solve the multiple technical bottlenecks through the integration of a specific positioning auxiliary device and a scheduling mechanism. Disclosure of Invention In view of the above, the invention aims to solve the technical problems of high dependence on manual operation, low positioning cooperative efficiency and large fluctuation of feeding time length of a crane in the feeding process of the existing converter, and provides a method for shortening the feeding time of the converter, optimizing the same-span cooperative scheduling effect of multiple cranes, further shortening the whole feeding time of the converter and improving the operation rate and productivity stability of the converter. In order to achieve the above purpose, the present invention provides the following technical solutions: A method for reducing the feed time of a converter comprising the steps of: The crane operation position cart positioning is realized by installing a scrap steel crane cart positioning mark on a crane track beam above a scrap steel pit scrap steel scale, installing a scrap steel bucket feeding height infrared positioner on a factory building elevation at a waiting position on the south side of a converter front platform, installing scrap steel crane converter feeding positioning marks on the crane track beam above each converter, installing a molten iron crane cart positioning mark on a crane track beam above a molten iron tank car track in a molten iron lifting hole area, installing a molten iron tank