Method for guaranteeing minimum in-furnace time of steel billet

Abstract

The invention provides a method for guaranteeing the minimum in-furnace time of a steel billet, and belongs to the technical field of steel smelting. A heating furnace is divided into a plurality of heating sections, and the length of each heating section is recorded; the lowest in-section time of each steel billet in each heating section is set; feeding the multiple billets into a heating furnace one by one, and recording the initial position of each billet entering the heating furnace; all the steel billets synchronously move by a set step pitch every a set step period, the current position of each steel billet is recorded, and the initial time when each steel billet enters each heating section is recorded; selecting a steel billet which is a set distance away from the next heating section in each heating section as a set steel billet at every set stepping period; and detecting the in-period time of the set steel billets every set time, and judging whether the lowest in-period time is reached, if so, continuing to move all the steel billets, and otherwise, stopping moving. It is guaranteed that the billet in-furnace time meets the process requirement, and the billet is controlled to be discharged in time.

Description

Technical Field

[0001] The invention belongs to the technical field of steel smelting, and more specifically, relates to a method for ensuring a minimum furnace time for a steel billet. Background Art

[0002] The heating furnace is the main equipment in the steel smelting and rolling system, accounting for 60%-70% of the energy consumption of the entire rolling system, and is a major energy consumer. Due to market reasons, the diversification of sales orders leads to the characteristics of small batches and diversified steel grades when producing single specifications, and the same furnace may be equipped with multiple steel grades. Due to the characteristics of steel grades, the furnace time requirements for different steel grades in each section are different. It is not enough to meet the rolling rhythm of the rolling mill, but it must be based on the characteristics of the steel grade. After the specific furnace time required by the process card, it can ensure that qualified products that meet the surface quality, internal structure and other properties are rolled out, and the output is maximized.

[0003] During the production process, on-site roll changes, sudden failures, shift changes, etc. require manual inspection to see whether each billet in each section meets the minimum furnace time requirement for that section. A large amount of data will be missed, and the minimum furnace time of the billet cannot be met, resulting in an uncomplicated production rhythm, a decrease in output, an increase in oxidation and burning loss of the billet, and a waste of energy for the entire production line. Summary of the invention

[0004] The purpose of the present invention is to provide a method for ensuring the minimum time of a steel billet in a furnace, so as to solve the problem of accurate time of manually checking the time of a steel billet in a furnace in the prior art.

[0005] In order to achieve the above object, the present invention provides a method for ensuring the minimum furnace time of a steel billet, comprising:

[0006] Divide the heating furnace into multiple heating sections and record the length of each heating section;

[0007] Set the minimum time for each billet to stay in each heating section;

[0008] Feed multiple billets into the heating furnace one by one, and record the initial position of each billet entering the heating furnace;

[0009] At every set stepping cycle, all the steel billets are synchronously moved by a set step distance, and the current position of each steel billet and the initial time when each steel billet enters each heating section are recorded;

[0010] At each set step cycle, a steel billet at a set distance from the next heating section is selected in each heating section as a set steel billet;

[0011] At every set time interval, the set time of the steel billet is detected to determine whether the minimum time is reached. If so, all the steel billets continue to move, otherwise they stop moving.

[0012] Optionally, the step of feeding the plurality of steel billets into the heating furnace one by one and recording the initial position of each steel billet entering the heating furnace comprises:

[0013] The steel billets are delivered one by one to the walking beam by a steel delivery machine;

[0014] The initial position is calculated by the length of the steel feeder penetrating into the heating furnace.

[0015] Optionally, the set stepping period is the stepping period of the stepping beam, and the set step length is the step length of the stepping beam.

[0016] Optionally, the set distance is two of the set step distances.

[0017] Optionally, at each interval of a set stepping cycle, all the steel billets synchronously move a set step distance, record the current position of each steel billet, and record the initial time when each steel billet enters each heating section, including:

[0018] Calculate the current position of the billet based on the initial position and the moving stroke of the walking beam;

[0019] According to the current position of the billet and the length of each heating section, the initial time when each billet enters each heating section is recorded.

[0020] Optionally, the step of selecting a steel billet at a set distance from a next heating section in each heating section as a set steel billet at each set step cycle interval includes:

[0021] According to the current position of the billet and the length of each heating section, the heating section where the billet is located and the distance to the next heating section are calculated.

[0022] Optionally, at every set time interval, the set time of the steel billet in the segment is detected, and it is determined whether the minimum time in the segment is reached, if so, all the steel billets continue to move forward, otherwise they stop moving forward, including:

[0023] The time the billet spends in the heating section is calculated based on the time when the billet enters the heating section and the current time.

[0024] Optionally, the set time is one minute.

[0025] Optionally, when it is determined that the minimum time period has not been reached, an alarm is also issued.

[0026] Optionally, the method for ensuring the minimum furnace time of the steel billet further comprises:

[0027] The host computer displays and saves in real time the current position of each billet, the time each billet spends in each heating section, the total time each billet spends in the furnace, and whether each billet has reached the minimum time in the section.

[0028] The beneficial effects of the present invention are as follows: providing a method for ensuring the minimum in-furnace time of a steel billet, comprising: dividing a heating furnace into a plurality of heating sections, recording the length of each heating section; setting the minimum in-furnace time of each steel billet in each heating section; feeding a plurality of steel billets into the heating furnace one by one, recording the initial position of each steel billet entering the heating furnace; at intervals of a set stepping cycle, all the steel billets synchronously move a set step distance, recording the current position of each steel billet, and recording the initial time of each steel billet entering each heating section; at intervals of a set stepping cycle, selecting a steel billet at a set distance from the next heating section in each heating section as a set steel billet; at intervals of a set time, detecting the in-furnace time of the set steel billet, and judging whether the minimum in-furnace time is reached, if so, all the steel billets continue to move, otherwise, stop moving, thereby ensuring that the in-furnace time and in-furnace time of the steel billet meet the process requirements, and controlling the steel billet to be promptly discharged from the furnace after meeting the minimum in-furnace time, thereby improving production efficiency, avoiding energy waste of the entire production line, reducing oxidation and burning loss of the steel billet, and preventing the occurrence of overheating and overburning of the steel billet.

[0029] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0031] Figure 1 A flow chart of a method for ensuring a minimum furnace time for a steel billet according to a first embodiment of the present invention is shown.

[0032] Figure 2 A flow chart of a method for ensuring a minimum furnace time for a steel billet according to a second embodiment of the present invention is shown.

[0033] Figure 3a A schematic diagram of a steel billet laying diagram according to the second embodiment of the present invention is shown.

[0034] Figure 3b A partially enlarged view of a steel billet laying diagram according to the second embodiment of the present invention is shown.

[0035] Figure 4 A schematic diagram showing detailed information of a steel billet in real time according to a second embodiment of the present invention is shown.

[0036] Figure 5A schematic diagram showing detailed information of a steel billet saved in the background according to the second embodiment of the present invention is shown.

[0037] Figure 6 A schematic diagram of a steel billet process card according to the second embodiment of the present invention is shown. DETAILED DESCRIPTION

[0038] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0039] Embodiment 1:

[0040] See also Figure 1 The present disclosure provides a method for ensuring the minimum furnace time of a steel billet, comprising:

[0041] S1: Divide the heating furnace into multiple heating sections and record the length of each heating section;

[0042] S2: Set the minimum time for each billet in each heating section;

[0043] S3: feeding multiple steel billets into the heating furnace one by one, and recording the initial position of each steel billet entering the heating furnace;

[0044] Specifically, this step includes delivering a plurality of steel billets to the walking beam one by one by means of a steel feeder; and calculating the initial position by the length of the steel feeder penetrating into the heating furnace.

[0045] S4: every time a set step cycle is passed, all the billets are synchronously moved by a set step distance, and the current position of each billet is recorded, and the initial time when each billet enters each heating section is recorded;

[0046] Specifically, in this step, the current position of the billet is calculated based on the initial position and the moving stroke of the walking beam;

[0047] According to the current position of the steel billet and the length of each heating section, record the initial time when each steel billet enters each heating section;

[0048] Set the step period to the step period of the walking beam, and set the step length to the step length of the walking beam.

[0049] S5: every time a set step cycle is passed, a steel billet at a set distance from the next heating section is selected in each heating section as a set steel billet;

[0050] Specifically, in this step, the distance is set to two set steps;

[0051] According to the current position of the billet and the length of each heating section, the heating section where the billet is located and the distance to the next heating section are calculated.

[0052] S6: At every set time interval, the set time of the steel billet in the segment is detected to determine whether the minimum time in the segment is reached. If so, all the steel billets continue to move, otherwise they stop moving.

[0053] Specifically, in this step, the time the billet is in the heating section is calculated based on the time when the billet enters the heating section and the current time;

[0054] Set the time to one minute;

[0055] When it is judged that the minimum value has not been reached within a period of time, an alarm is also issued.

[0056] S7: The host computer displays and saves in real time the current position of each billet, the time each billet spends in each heating section, the total time each billet spends in the furnace, and whether each billet reaches the minimum time each billet spends in the heating section.

[0057] Specifically, the host computer can intuitively display the real-time furnace time of each segment on each billet, and transmit the data to the background records in real time. Even if the heating furnace is disconnected from the network, the historical records can be checked to ensure the furnace time of each segment based on the records, and ensure that the billets are discharged from the furnace in time.

[0058] In summary, this method can ensure that the time in the furnace and the time in the billet meet the process requirements, and control the billet to be taken out of the furnace in time after meeting the minimum time in the furnace, thereby improving production efficiency, avoiding energy waste of the entire production line, reducing the oxidation and burning loss of the billet, and eliminating the occurrence of overheating and overburning of the billet.

[0059] Embodiment 2:

[0060] See also Figure 2 The embodiment of the present disclosure provides a method for ensuring the minimum furnace time of steel billets, wherein the lengths of each heating section of the heating furnace and the total length of the heating furnace are input into the secondary program, and the furnace time of process cards of different steel grades is input into the primary program before the production of the steel grade (process cards such as Figure 6As shown in the figure, when the steel billet is sent to the stepping beam by the heating furnace steel feeder, the furnace time of this steel type is recorded, and then the initial position of the heating section is calculated by the length of the steel feeder outside the heating furnace penetrating into the furnace. The secondary program records the distance from the inner wall of the heating furnace to the original position of the steel feeder. The distance from the inner wall of the heating furnace to the original position of the steel feeder is subtracted from the distance from the inner wall of the heating furnace to the original position of the steel feeder, which is the initial position of the steel billet in the heating furnace. The new coordinate position of the steel billet is determined by the forward stroke of the stepping beam. The two steel billets closest to the second heating section in the first heating section are used as the reference. The background program detects the time in the section every minute. When there are two stepping cycles with the next section, if the time in the section is not met, the color of the steel billet will change color and alarm to remind the staff on duty. If the color of the steel billet is the original design, the stepping beam can move forward normally. This method is also used for other heating sections with furnace time requirements.

[0061] At the same time, the real-time time of each billet in each heating section is marked on the billet laying diagram in the secondary heating furnace of the upper computer. The billet laying diagram is as follows: Figure 3a-3b As shown, the interface can display the time each steel billet spends in each heating section and the total time in the furnace. Graph mark 1 shows that the time the steel billet spends in the furnace in heating section one is 147 minutes, heating section two is 151 minutes, heating section three is 61 minutes, and equalizing section is 0 minutes (indicating that the steel billet is in heating section three at this time and has not entered the equalizing section). The total time in the furnace is 360 minutes. Moreover, as the stepping beam moves forward, the corresponding time in the furnace on the steel billet will also change in real time. The time in the furnace in each section can be accurately recorded and transmitted to the background data in real time. Even if the heating furnace is disconnected from the network, the time in the furnace can be guaranteed based on the records, so that the steel billets can be discharged from the furnace in time. Graph mark 2 shows the dividing lines between the sections. The two steel billets close to the next section are not displayed in red, proving that the time in the furnace in each section meets the requirements of the process card. Graph mark 3 shows that this heating furnace is a double-row material furnace. Figure 4 As shown, detailed information on each billet can also be viewed by clicking on it.

[0062] The historical data saved in the background can be consulted, such as Figure 5 As shown in the figure, the interface shows that this heating furnace is double-row, which row each billet is in, the specific coordinate position of the billet in this row, and the time the billet has been in the furnace before this position. Figure 6 As shown, this interface displays the specific information of each billet, including steel type, furnace number, coordinate position, and the time in the furnace for each section.

[0063] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A method for ensuring the minimum furnace time of a steel billet, characterized in that: include: Divide the heating furnace into multiple heating sections and record the length of each heating section; Set the minimum time for each billet to stay in each heating section; Feed multiple billets into the heating furnace one by one, and record the initial position of each billet entering the heating furnace; At every set stepping cycle, all the steel billets are synchronously moved by a set step distance, and the current position of each steel billet and the initial time when each steel billet enters each heating section are recorded; At each set step cycle, a steel billet at a set distance from the next heating section is selected in each heating section as a set steel billet; At every set time interval, the set time of the steel billet is detected to determine whether the minimum time is reached. If so, all the steel billets continue to move, otherwise they stop moving.

2. The method for ensuring the minimum furnace time of the steel billet according to claim 1, characterized in that: The method of feeding a plurality of steel billets into the heating furnace one by one and recording the initial position of each steel billet entering the heating furnace comprises: The steel billets are delivered one by one to the walking beam by a steel delivery machine; The initial position is calculated by the length of the steel feeder penetrating into the heating furnace.

3. The method for ensuring the minimum furnace time of the steel billet according to claim 2, characterized in that: The set stepping period is the stepping period of the stepping beam, and the set step length is the step length of the stepping beam.

4. The method for ensuring the minimum furnace time of the steel billet according to claim 3, characterized in that: The set distance is two of the set step distances.

5. The method for ensuring the minimum furnace time of the steel billet according to claim 2, characterized in that: At each set stepping cycle, all the steel billets synchronously move a set step distance, record the current position of each steel billet, and record the initial time when each steel billet enters each heating section, including: Calculate the current position of the billet based on the initial position and the moving stroke of the walking beam; According to the current position of the billet and the length of each heating section, the initial time when each billet enters each heating section is recorded.

6. The method for ensuring the minimum furnace time of steel billets according to claim 2, characterized in that: The method of selecting a steel billet at a set distance from a next heating section in each heating section as a set steel billet at each set step cycle interval includes: According to the current position of the billet and the length of each heating section, the heating section where the billet is located and the distance to the next heating section are calculated.

7. The method for ensuring the minimum furnace time of the steel billet according to claim 5, characterized in that: At every set time interval, the set steel billet time is detected and judged whether the minimum time is reached. If it is reached, all steel billets continue to move forward, otherwise they stop moving forward, including: The time the billet spends in the heating section is calculated based on the time when the billet enters the heating section and the current time.

8. The method for ensuring the minimum furnace time of steel billets according to claim 1, characterized in that: The setting time is one minute.

9. The method for ensuring the minimum furnace time of steel billets according to claim 1, characterized in that: When it is judged that the minimum value has not been reached within a period of time, an alarm is also issued.

10. The method for ensuring the minimum furnace time of steel billets according to claim 1, characterized in that: Also includes: The host computer displays and saves in real time the current position of each billet, the time each billet spends in each heating section, the total time each billet spends in the furnace, and whether each billet has reached the minimum time in the section.

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