A method for online division of heats of billet continuous casting machine

Abstract

The present invention relates to an online method for dividing the furnaces of a square billet continuous casting machine, which belongs to the technical field of steelmaking and continuous casting, and comprises the following steps: real-time monitoring of the pouring time of a large ladle, marking the length of the billet between the lower mouth of the continuous casting machine crystallizer and the origin of the cutting gun, using a counter to calculate the number of cuts of the steel in this furnace, and clearing the counter in time after the steel in this furnace is cut, and the control system real-time tracking the position and quantity of the hot billets in the conveying roller, billet discharge roller and cooling bed conveying process; when the control system detects a cooling bed failure, the counter prompts the current billet division information, and transmits the billet division information to the furnace number marking area in real time, and the furnace number worker timely removes the hot billets on the faulty cooling bed according to the information fed back by the counter, and corrects the number of remaining billets and the furnace number identification; when a spray number machine failure is detected, the furnace number identification is performed manually. The present invention improves the accuracy of billet division of the upper and lower furnace steel of the continuous casting machine, and reduces the outflow of defective products caused by wrong billet division.

Description

Technical Field

[0001] The invention belongs to the technical field of steelmaking continuous casting and relates to an online method for dividing furnaces of a square billet continuous casting machine. Background Art

[0002] In the prior art, the L2 process control system used for steelmaking and continuous casting calculates the casting length of each stream by collecting the pouring time and casting weight of the ladle and combining the length of the billet drawn by the straightening machine. Among them, the turntable metering equipment used for casting weighing is not accurate, which easily causes a large deviation between the casting amount and the actual cutting amount.

[0003] In addition, if the cooling bed fails after the ingot is cut, the hot ingot information cannot be marked in time, the furnace number of the hot ingot that is forced to be lifted away cannot be identified, and the subsequent ingot cutting with the furnace number is also affected, which can easily cause the outflow of defective products from the wrong ingot.

[0004] In addition, when the number spraying machine fails, the furnace number cannot be identified. If manual intervention is not timely, it will also cause problems of mixed furnaces and mixed steel. Summary of the invention

[0005] In view of this, the object of the present invention is to provide a method for online dividing the heats of a billet continuous casting machine, so as to improve the accuracy of dividing the billets between the upper and lower furnaces of the continuous casting machine.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] The invention discloses an online method for dividing the heats of a square billet continuous casting machine, comprising the following steps: real-time monitoring of the ladle pouring time, marking the length of the billet between the lower mouth of the continuous casting machine crystallizer and the origin of a cutting gun, calculating the number of cuts of the current furnace steel by a counter, and clearing the counter after the current furnace steel is cut.

[0008] Optionally, the control system tracks in real time the position of the hot billets in the conveying rollers, billet discharge rollers and cooling bed conveying process; when the control system detects a cooling bed failure, the counter prompts the current billet division information including the number of hot billets on the conveying rollers, billet discharge rollers and cooling bed, and transmits the current billet division information to the furnace number marking area in real time. The furnace number worker promptly removes the hot billets from the faulty cooling bed according to the current billet division information fed back by the counter, and corrects the remaining number of billets and the furnace number identification.

[0009] Optionally, when the control system detects a malfunction of the marking machine, the counter directly transmits the current blank marking information to the furnace number marking area for manual furnace number identification.

[0010] Optionally, for the ingots containing both molten steel from the front furnace and molten steel from the back furnace, the furnace numbers can be divided according to the principle of "large quantities belong to the furnace".

[0011] The beneficial effects of the present invention are as follows: the number of cuts is recorded online according to the pouring start time and the cutting counter, thereby improving the accuracy of steel slab marking in the upper and lower furnaces of the continuous casting machine; under abnormal circumstances, the number of remaining cast billets and the furnace number identification are corrected by using the actual number of hot billets lifted off, thereby achieving full tracking of the cut billets, thereby avoiding the mixing of furnaces and steel caused by wrong slabs being marked in the upper and lower furnaces due to a cooling bed failure or a number spraying machine failure, and reducing the outflow of defective products caused by wrong slabs being marked.

[0012] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0014] Figure 1 It is a schematic diagram of the method for online dividing heats of a billet continuous casting machine according to the present invention. DETAILED DESCRIPTION

[0015] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0016] See also Figure 1 , a method for online dividing heats of a billet continuous casting machine, comprising the following steps:

[0017] S1 The cutting personnel or control system monitors the ladle pouring time in real time, marks the length of the ingot from the bottom of the continuous casting machine crystallizer to the origin of the cutting gun, and uses the counter to calculate the number of cuts of this furnace steel. After the cutting of this furnace steel is completed, the counter is cleared in time;

[0018] The S2 control system tracks the location and quantity of hot billets in the conveying roller, billet discharge roller and cooling bed conveying process in real time;

[0019] S3 When the control system detects a cooling bed failure, the counter prompts the current billet-striping information, which includes the number of hot billets on the conveyor roller, billet-discharging roller and cooling bed respectively, and transmits the current billet-striping information to the furnace number marking area in real time. The furnace number worker promptly removes the hot billets on the faulty cooling bed according to the current billet-striping information fed back by the counter, and corrects the remaining number of billets and the furnace number identification; when the control system detects a spraying machine failure, the counter transmits the current billet-striping information directly to the furnace number marking area, and manually identifies the furnace number.

[0020] Due to continuous casting from multiple furnaces, there are ingots (connecting ingots) containing both molten steel from the front furnace and molten steel from the back furnace. The furnace numbers are divided according to the principle of "large quantities belong to the furnace with the largest quantity".

[0021] Example 1

[0022] Production of HRB400E rebar, specification (170×170) mm 2 , cooling bed failure, casting volume 74.783t, theoretically calculated cutting volume 27.697 pieces, actual L2 system billet cutting result 30 pieces, improved online billet cutting result 28 pieces, which meets the requirements.

[0023] Example 2

[0024] Production of HRB400E rebar, specification (170×170) mm 2 , the spraying machine failed, the casting volume was 76.557t, the theoretical cutting volume was 28.354 pieces, the actual L2 system cutting result was 30 pieces, and the improved online cutting result was 28 pieces, which met the requirements.

[0025] Example 3

[0026] Production of HRB400E rebar, specification (170×170) mm 2 , the spraying machine failed, the casting volume was 69.524t, the theoretical cutting volume was 25.749 pieces, the actual L2 system cutting result was 24 pieces, and the improved online cutting result was 26 pieces, which met the requirements.

[0027] The present invention records the number of cuts online according to the pouring start time and the cutting counter, thereby improving the accuracy of steel slab division in the upper and lower furnaces of the continuous casting machine; under abnormal circumstances, the remaining number of cast billets and the furnace number identification are corrected by using the actual number of hot billets lifted off, so as to achieve full tracking of the cast billets after cutting, and can avoid the mixing of furnaces and steel caused by wrong billets being divided in the upper and lower furnaces due to a cooling bed failure or a number spraying machine failure, reduce the outflow of defective products caused by wrong billets being divided, and achieve the requirements of furnace division and branch management.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A method for online dividing heats of a billet continuous casting machine, characterized in that: The following steps are involved: Real-time monitoring of ladle pouring time, marking the length of the ingot from the bottom of the continuous casting machine crystallizer to the origin of the cutting gun, using the counter to calculate the number of cuts of this furnace steel, and the counter is reset after the cutting of this furnace steel; The control system tracks the position of the hot billets in the conveying roller, billet discharge roller and cooling bed conveying process in real time; when the control system detects a cooling bed failure, the counter prompts the current billet division information including the number of hot billets on the conveying roller, billet discharge roller and cooling bed, and transmits the current billet division information to the furnace number marking area in real time. The furnace number worker promptly removes the hot billets from the faulty cooling bed according to the current billet division information fed back by the counter, and corrects the remaining billet quantity and furnace number identification; when the control system detects a spraying machine failure, the counter directly transmits the current billet division information to the furnace number marking area, and manually identifies the furnace number; for billets with both front furnace molten steel and rear furnace molten steel, the furnace number is divided according to the principle of "more quantity belongs to the furnace".

Images