阅读说明：本技术 一种板坯热轧温降检测方法 (Slab hot rolling temperature drop detection method ) 是由 于浩淼 龚坚 于洋 武巧玲 付光 孙茂林 马家骥 辛艳辉 于 2020-06-03 设计创作，主要内容包括：一种板坯热轧温降检测方法,所述方法包括步骤：在板坯热轧产线上选择温度检测位置；根据所述温度检测位置将所述板坯热轧产线划分为若干检测区间；在所有所述温度检测位置处配置温度检测装置；开启所述板坯热轧产线,以对所述板坯进行热轧操作；使用所述温度检测装置对所述板坯进行测温；统计所有所述温度检测装置的检测数据；根据所有所述检测数据,统计所述板坯在所述检测区间内的温降；根据所有所述温降,分析所述板坯在所述检测区间内的温度均匀性；根据所述温降和所述温度均匀性,判断板坯热轧产线温降产生波动时所述板坯所处的检测区间。当热轧产线温降产生波动时能及时有效发现问题发生所处的检测区间,从而采取有针对性的措施进行改善。(A slab hot rolling temperature drop detection method comprises the following steps: selecting a temperature detection position on a slab hot rolling production line; dividing the slab hot rolling production line into a plurality of detection intervals according to the temperature detection positions; arranging temperature detection devices at all the temperature detection positions; starting the slab hot rolling production line to perform hot rolling operation on the slab; measuring the temperature of the plate blank by using the temperature detection device; counting the detection data of all the temperature detection devices; according to all the detection data, the temperature drop of the plate blank in the detection interval is counted; analyzing the temperature uniformity of the plate blank in the detection interval according to all the temperature drops; and judging the detection interval of the slab when the temperature drop of the slab hot rolling production line fluctuates according to the temperature drop and the temperature uniformity. When the temperature drop of the hot rolling production line fluctuates, the detection interval where the problem occurs can be timely and effectively found, so that targeted measures are taken to improve the problem.)

1. A slab hot rolling temperature drop detection method is characterized by comprising the following steps:

selecting a temperature detection position on a slab hot rolling production line;

dividing the slab hot rolling production line into a plurality of detection intervals according to the temperature detection positions;

arranging temperature detection devices at all the temperature detection positions;

starting the slab hot rolling production line to perform hot rolling operation on the slab;

measuring the temperature of the plate blank by using the temperature detection device;

counting the detection data of all the temperature detection devices;

according to all the detection data, the temperature drop of the plate blank in the detection interval is counted;

analyzing the temperature uniformity of the plate blank in the detection interval according to all the temperature drops;

and judging the detection interval of the slab when the temperature drop of the slab hot rolling production line fluctuates according to the temperature drop and the temperature uniformity.

2. The slab hot rolling temperature drop detection method according to claim 1, wherein the temperature detection position comprises: the front part of the width fixing machine, an outlet R1, an outlet R2, an inlet of a finishing mill and an outlet of the finishing mill.

3. The slab hot rolling temperature drop detection method according to claim 1, wherein the detection interval comprises: the furnace outlet is arranged in front of the width fixing machine, the width fixing machine is arranged in front of the R1 outlet, the R1 outlet is arranged in front of the R2 outlet, the R2 outlet is arranged in front of the finishing mill inlet, and the finishing mill inlet is arranged in front of the finishing mill outlet.

4. The slab hot rolling temperature drop detection method according to claim 1, wherein the measuring the temperature of the slab by using the temperature detection device comprises: and measuring the temperature of the slab in the width direction by using the temperature detection device.

5. The slab hot rolling temperature drop detection method according to claim 4, wherein the measuring the temperature of the slab by using the temperature detection device further comprises: and measuring the temperature of the central point position of the plate blank by using the temperature detection device.

6. The slab hot rolling temperature drop detection method according to claim 1, wherein the analyzing the temperature uniformity of the slab within the detection interval comprises: and analyzing the temperature uniformity of the slab in the width direction in the detection interval.

7. The slab hot rolling temperature drop detection method according to claim 6, wherein the step of analyzing the temperature uniformity of the slab in the width direction within the detection interval comprises the steps of:

measuring the temperature of the plate blank in a plate blank hot rolling production line by using a thermal imager;

importing a thermal imaging image shot by the thermal imaging camera into a computer;

processing the image data using thermal imaging analysis software;

filling a grid with a thermal imaging graph by using drawing software to divide the image into a plurality of squares;

and analyzing the edge temperature drop value and the width value of the edge temperature drop area of the plate blank through a grid.

8. The slab hot rolling temperature drop detection method according to claim 7, wherein the processing of the image data using the thermal imaging analysis software comprises the steps of:

importing the thermal imaging map into the thermal imaging analysis software;

taking a temperature measuring line in the width direction of the plate blank; the length of the temperature measuring line is longer than the width of the plate blank and stretches across the width direction of the plate blank;

and automatically generating a temperature line graph of the temperature measuring line in the thermal imaging analysis software.

9. The slab hot rolling temperature drop detection method according to claim 7, wherein the filling of the grid with the mapping software to the thermal imaging graph comprises the steps of:

acquiring a region with a temperature measuring line added in the thermal imaging map;

all the regions were filled with a cross grid using Photoshop software.

10. The slab hot rolling temperature drop detection method according to claim 7, wherein the starting point of the temperature drop zone is: the temperature control method comprises the following steps that (1) a point corresponding to a temperature uniform region in a temperature measuring line or a point corresponding to a sudden change of a slope on the left side of the temperature measuring line, and the end point of the temperature reduction region is as follows: and the corresponding point when the slope of the tangent of the temperature measuring line changes suddenly.

Technical Field

The invention belongs to the technical field of hot rolling production, and particularly relates to a slab hot rolling temperature drop detection method.

Background

The size of the hot rolling temperature drop is directly related to the performance and the quality of a finished product, a plurality of factors influencing the hot rolling temperature drop are involved, once the hot rolling temperature drop generates fluctuation, the checking is very complicated and difficult, the hot rolling continuous production has fast pace and high yield, the performance and the quality of the product are ensured, the rolling stability of a subsequent finish rolling procedure is ensured, and a high standard is provided for maintaining the stability of the temperature drop of a rough rolling area. Therefore, how to find the abnormal hot rolling temperature drop in time in daily work and quickly and effectively find the key area influencing the hot rolling temperature drop so as to take corresponding measures is important.

Disclosure of Invention

The invention provides a slab hot rolling temperature drop detection method, which solves the problem that a key area influencing hot rolling temperature drop cannot be quickly and effectively found in the prior art.

In order to solve the technical problem, the invention provides a slab hot rolling temperature drop detection method, which comprises the following steps:

selecting a temperature detection position on a slab hot rolling production line;

dividing the slab hot rolling production line into a plurality of detection intervals according to the temperature detection positions;

arranging temperature detection devices at all the temperature detection positions;

starting the slab hot rolling production line to perform hot rolling operation on the slab;

measuring the temperature of the plate blank by using the temperature detection device;

counting the detection data of all the temperature detection devices;

according to all the detection data, the temperature drop of the plate blank in the detection interval is counted;

analyzing the temperature uniformity of the plate blank in the detection interval according to all the temperature drops;

and judging the detection interval of the slab when the temperature drop of the slab hot rolling production line fluctuates according to the temperature drop and the temperature uniformity.

Preferably, the temperature detection position includes: the front part of the width fixing machine, an outlet R1, an outlet R2, an inlet of a finishing mill and an outlet of the finishing mill.

Preferably, the detection interval includes: the furnace outlet is arranged in front of the width fixing machine, the width fixing machine is arranged in front of the R1 outlet, the R1 outlet is arranged in front of the R2 outlet, the R2 outlet is arranged in front of the finishing mill inlet, and the finishing mill inlet is arranged in front of the finishing mill outlet.

Preferably, the temperature measurement of the slab by using the temperature detection device includes: and measuring the temperature of the slab in the width direction by using the temperature detection device.

Preferably, the temperature measurement of the slab by using the temperature detection device further includes: and measuring the temperature of the central point position of the plate blank by using the temperature detection device.

Preferably, said analyzing the temperature uniformity of said slab within said detection interval comprises: and analyzing the temperature uniformity of the slab in the width direction in the detection interval.

Preferably, the analyzing the temperature uniformity of the slab in the width direction within the detection interval comprises the steps of:

measuring the temperature of the plate blank in a plate blank hot rolling production line by using a thermal imager;

importing a thermal imaging image shot by the thermal imaging camera into a computer;

processing the image data using thermal imaging analysis software;

filling a grid with a thermal imaging graph by using drawing software to divide the image into a plurality of squares;

and analyzing the edge temperature drop value and the width value of the edge temperature drop area of the plate blank through a grid.

Preferably, the processing of the image data using the thermal imaging analysis software comprises the steps of:

importing the thermal imaging map into the thermal imaging analysis software;

taking a temperature measuring line in the width direction of the plate blank; the length of the temperature measuring line is longer than the width of the plate blank and stretches across the width direction of the plate blank;

and automatically generating a temperature line graph of the temperature measuring line in the thermal imaging analysis software.

Preferably, the filling the grid with the thermal imaging graph by using the drawing software comprises the following steps:

acquiring a region with a temperature measuring line added in the thermal imaging map;

all the regions were filled with a cross grid using Photoshop software.

Preferably, the starting point of the temperature drop region is: the temperature control method comprises the following steps that (1) a point corresponding to a temperature uniform region in a temperature measuring line or a point corresponding to a sudden change of a slope on the left side of the temperature measuring line, and the end point of the temperature reduction region is as follows: and the corresponding point when the slope of the tangent of the temperature measuring line changes suddenly.

One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:

according to the slab hot rolling temperature drop detection method, when the temperature drop of a hot rolling production line fluctuates, a detection interval where a problem occurs can be timely and effectively found, so that targeted measures are taken to improve, and the problem of the quality of a large batch of products caused by the fluctuation of the temperature drop of rough rolling and finish rolling is avoided.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

FIG. 1 is a temperature drop trend chart obtained by a slab hot rolling temperature drop detection method provided by an embodiment of the present invention;

fig. 2 is a table showing detection records of temperature deviations on both sides of each section of the slab in the width direction of the slab in each section of the rolling line, which is prepared according to the method for detecting the hot rolling temperature drop of the slab provided by the embodiment of the invention.

Detailed Description

The present invention will be described in detail below with reference to specific embodiments and examples, and the advantages and various effects of the present invention will be more clearly apparent therefrom. It will be understood by those skilled in the art that these specific embodiments and examples are for the purpose of illustrating the invention and are not to be construed as limiting the invention.

Throughout the specification, unless otherwise specifically noted, terms used herein should be understood as having meanings as commonly used in the art. Accordingly, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. If there is a conflict, the present specification will control.

Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by existing methods.

Referring to fig. 1 and 2, in an embodiment of the present application, the present invention provides a slab hot rolling temperature drop detection method, including the steps of:

selecting a temperature detection position on a slab hot rolling production line;

dividing the slab hot rolling production line into a plurality of detection intervals according to the temperature detection positions;

arranging temperature detection devices at all the temperature detection positions;

starting the slab hot rolling production line to perform hot rolling operation on the slab;

measuring the temperature of the plate blank by using the temperature detection device;

counting the detection data of all the temperature detection devices;

according to all the detection data, the temperature drop of the plate blank in the detection interval is counted;

analyzing the temperature uniformity of the plate blank in the detection interval according to all the temperature drops;

and judging the detection interval of the slab when the temperature drop of the slab hot rolling production line fluctuates according to the temperature drop and the temperature uniformity.

In the embodiment of the application, a plurality of temperature detection positions are selected on a slab hot rolling production line, then the area between the adjacent temperature detection positions is divided into a plurality of detection intervals, then the temperature of the slab is detected at the temperature detection positions, the temperature drop condition and the temperature uniformity of the slab in the detection intervals can be judged, and the detection intervals where the slab is located when the temperature drop of the slab hot rolling production line fluctuates can be judged intuitively and simply.

In an embodiment of the present application, the temperature detection position includes: the front part of the width fixing machine, an outlet R1, an outlet R2, an inlet of a finishing mill and an outlet of the finishing mill.

The most important devices of the hot rolling production line, through which the plate blanks are heated by the heating furnace and are descaled by high-pressure water, are the width fixing machine, R1, R2 and finish rolling in sequence, so that the five positions are the inlet and the outlet corresponding to the most important devices of the hot rolling production line, the temperature change of the plate blanks (strip steel) when passing through the devices can be determined through temperature detection and monitoring of the five positions, the temperature change trend of the whole strip steel production line is divided into different sections for monitoring, the definition and the definition are clear, the temperature drop of the plate blanks (strip steel) of the whole production line is clear, and the problems can be searched and solved in a targeted manner.

In an embodiment of the present application, the detection interval includes: the furnace outlet is arranged in front of the width fixing machine, the width fixing machine is arranged in front of the R1 outlet, the R1 outlet is arranged in front of the R2 outlet, the R2 outlet is arranged in front of the finishing mill inlet, and the finishing mill inlet is arranged in front of the finishing mill outlet.

In an embodiment of the present application, the temperature detection device includes: a high-temperature thermal imager and an infrared temperature measuring gun. The temperature measurement operation can be carried out on the plate blank by a high-temperature thermal imager or an infrared temperature measurement gun.

In this embodiment of the application, the measuring the temperature of the slab by using the temperature detection device includes: and measuring the temperature of the slab in the width direction by using the temperature detection device. By measuring the temperature of the slab in the width direction, the temperature condition of hot rolling of the slab in the width direction can be analyzed, and the temperature uniformity of the hot rolling of the slab can be further analyzed.

The large temperature difference in the width direction of the slab (strip steel) can cause a plurality of problems, for example, the large temperature difference at two sides can generate camber in the rolling process, edge burr difference such as IF steel can be caused, and the like, so the detection in the width direction of the slab (strip steel) has great practical guiding significance for monitoring the temperature deviation at two sides of the slab (strip steel), and a series of quality problems are avoided.

In this embodiment of the application, the using the temperature detection device to measure the temperature of the slab further includes: and measuring the temperature of the central point position of the plate blank by using the temperature detection device.

The temperature of the central point position generally represents the temperature of a plate blank (strip steel), the temperature of the central point is generally higher than that of the edge part, and the detection is important for clearly detecting the influence of rolling line water on the plate blank (strip steel) and evaluating the heating temperature uniformity of the plate blank by steel burning of a heating furnace.

In an embodiment of the present application, the analyzing the temperature uniformity of the slab in the detection interval includes: and analyzing the temperature uniformity of the slab in the width direction in the detection interval.

In an embodiment of the present application, the analyzing the temperature uniformity of the slab in the width direction within the detection interval includes:

measuring the temperature of the plate blank in a plate blank hot rolling production line by using a thermal imager;

importing a thermal imaging image shot by the thermal imaging camera into a computer;

processing the image data using thermal imaging analysis software;

filling a grid with a thermal imaging graph by using drawing software to divide the image into a plurality of squares;

and analyzing the edge temperature drop value and the width value of the edge temperature drop area of the plate blank through a grid.

Specifically, in the embodiment of the present application, the processing the image data by using the thermal imaging analysis software includes the steps of:

importing the thermal imaging map into the thermal imaging analysis software;

taking a temperature measuring line in the width direction of the plate blank; the length of the temperature measuring line is longer than the width of the plate blank and stretches across the width direction of the plate blank;

and automatically generating a temperature line graph of the temperature measuring line in the thermal imaging analysis software.

In an embodiment of the present application, the filling the grid with the mapping software for the thermal imaging graph includes the steps of:

acquiring a region with a temperature measuring line added in the thermal imaging map;

all the regions were filled with a cross grid using Photoshop software.

In the embodiment of the present application, the starting point of the temperature drop region is: the temperature control method comprises the following steps that (1) a point corresponding to a temperature uniform region in a temperature measuring line or a point corresponding to a sudden change of a slope on the left side of the temperature measuring line, and the end point of the temperature reduction region is as follows: and the corresponding point when the slope of the tangent of the temperature measuring line changes suddenly.

In the embodiment of the present application, there are two cases at the starting point of the temperature drop region, the first case is: when a relatively uniform temperature region exists in the temperature measuring line, the corresponding point in the region is taken as the starting point of the temperature reduction region; in the second case: when the temperature fluctuation is large, taking the point of the left side slope of the temperature measurement line with sudden change as the starting point of the temperature drop area; the end point of the temperature drop region is only one condition, the change of the tangent slope of the curve can be obviously seen from the temperature rise of the left part in the temperature measuring line, and if one point has a sudden change, the point is taken as the end point of the temperature drop region.

The present application is described in detail below with specific examples.

And measuring the temperature of the width direction and the central point position of the plate blank at five temperature detection positions of the front part of the fixed width machine, the outlet of R1, the outlet of R2, the inlet of the finishing mill and the outlet of the finishing mill by using a high-temperature thermal imager and an infrared temperature measuring gun. According to the statistics of detection data, the temperature drop and the temperature uniformity in the width direction of the plate blank in different detection intervals are counted according to the outlet of a furnace, the outlet of a fixed width machine, the outlet of a R1, the outlet of a R1, the outlet of a R2, the outlet of a R2, a finish rolling inlet and the outlet of a finish rolling inlet, and detection, verification, statistics and analysis are carried out according to the steel type, the specification and different seasons.

According to the slab hot rolling temperature drop detection method, when the temperature drop of a hot rolling production line fluctuates, a detection interval where a problem occurs can be timely and effectively found, so that targeted measures are taken to improve, and the problem of the quality of a large batch of products caused by the fluctuation of the temperature drop of rough rolling and finish rolling is avoided.

Finally, it should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.