KR20080032676A - Apparatus for realtime temperature sensing by using wireless in steel manufacture ladle - Google Patents

Abstract

A wireless real-time temperature measuring apparatus in a steel manufacture ladle is provided to save costs for a probe used for measuring the temperature of molten steel inside the ladle by including a wireless temperature measuring device and a computer. A wireless real-time temperature measuring apparatus in a steel manufacture ladle(8) comprises a wireless temperature measuring device(10) and a computer(22). The wireless temperature measuring device converts analog temperature data measured inside the ladle and a vacant ladle into a digital signal, and transmits it wirelessly. The computer is equipped with a wireless receiver(21) for performing communication with the wireless temperature measuring device, receives and processes temperature measuring data detected and transmitted from the wireless temperature measuring device, and outputs it to a monitor(30) for monitoring steel manufacturing and refining work.

Description

Apparatus for realtime temperature sensing by using wireless in Steel Manufacture Ladle}

1 is a flow chart of a general steelmaking refining process

2 is a schematic diagram of a temperature measuring device in a steelmaking ladle according to the prior art;

3 is a schematic diagram of a real-time temperature wireless measuring device and its system in the steelmaking ladle according to the present invention

4 is a detailed configuration diagram of a wireless measuring device integrally mounted on the sidewall of the steel ladle for real-time temperature measurement according to the present invention of FIG.

<Explanation of symbols for the main parts of the drawings>

8: water ladle 8a: refractory

8b, 8c Permanent field of the first and second 8d: bar

9: molten steel 10: wireless thermometer

10a: temperature measuring chamber housing 11: temperature measuring module

12 temperature / signal converter 13 wireless transmitter

14 power source 21 wireless receiver

22: computer 30: monitor

The present invention relates to a device capable of continuously measuring the temperature of the molten steel and the temperature of the steel ladle in steelmaking ladle, in particular a steel ladle (Teeming) used for transporting molten steel between the start of the injection tundish ladle injection in the converter tapping of the steelmaking process The present invention relates to a real-time temperature wireless measuring device in steel ladle that measures the temperature of molten steel and the temperature of the ladle in real time and transmits and receives it wirelessly, and receives and outputs it from the wireless processing computer so that the operator can monitor it.

In the conventional steelmaking refining process, as shown in FIG. 1, a molten iron preliminary process (S20) is carried out by transporting molten iron drawn from the blast furnace to a torpedo ladle car (TLC) to perform dehydration and delineation. After the transfer to the charging ladle of the charter preparation, it is composed of a casting process (S50) which produces slabs through a converter process (S30) and a molten steel secondary refining process (S40).

Generally, the steelmaking process for refining molten iron with molten steel is divided into a primary refining process in a converter and a secondary refining process in which molten steel left in the converter is taken from a steel ladle placed on a steel bogie. This secondary refining process is a key facility for making high-grade clean steel, and the composition and temperature adjustment are indispensable for optimal refining to meet demand.

Fig. 2 is a schematic diagram of a temperature measuring device according to the prior art, and is configured to measure and analyze the temperature of a sample in the receiving ladle 8 with a temperature measuring sampling device 1 equipped with a temperature measuring probe 1a. That is, when the probe 1a is immersed in the molten steel 9 in the steel ladle 8 in the refining process, electromotive force is generated in the RTC, and the electromotive force is passed through the RTC 2 to the main controller (PLC: 3). It is possible to calculate the temperature by transmitting the temperature, and the measured temperature data is transmitted to the computer 4 to display the molten steel temperature through the monitoring screen 5 for field operation so that the operator can know the molten steel temperature. . The main controller 3 is connected to a probe detachment apparatus 6 and an auxiliary controller 7.

As described above, in the process of refining molten steel in the steel ladle 8, the temperature is measured by using a probe to measure the temperature of the molten steel, and the input amount of the coolant or the heating material is determined based on the measured temperature. do.

However, in the conventional temperature measuring apparatus as described above, the molten steel of the steel ladle 8 includes numerous operating variables such as various metallurgical reactions through slag removal and process waiting process from the converter to the secondary refining process. In order to know the molten steel temperature value in the ladle during operation, it is not only inconvenient to measure each time until the desired temperature value is reached by using an expensive probe for measuring temperature, but also the production cost burden and measurement temperature due to the use of a temperature measuring probe. Delays in time occur, which leads to a decrease in productivity.

In addition, the empty ladle after the casting process in the playing process is moved to a separate repair site, and the refractories are rebuilt or reused by determining whether to repair or reuse by inspecting the refractory inside the ladle and the nozzles mounted at the bottom. After the inspection and repair is completed, the ladle is moved to the mobile truck, and the molten steel that has been refined in the converter is transferred to the ladle and then moved to the post-process. At this time, when refining molten steel in the converter, the refining work must be completed according to the appropriate molten steel temperature required in the secondary refining process, and the molten steel temperature is lowered by the cooled ladle when the refining molten steel is dropped on the ladle. Before finishing the work, the cooling condition of the common ladle is checked in advance and the refining work is finished by slightly increasing the molten steel temperature in consideration of the drop in the molten steel temperature.

Meanwhile, the number of ladles must be large enough for the continuous work of the converter and the playing process and the ladle repair and inspection. Therefore, if the temperature of the refractory in the ladle is cooled for a long time in the ladle atmosphere, the waiting time of each ladle is not constant, and the time for keeping the ladle re-built with new refractory in the dry burner is different, And the temperature change of the ladle depending on the degree of adhesion of the slag.

In this situation, in order to check the temperature of the ladle, when the ladle is moved to the lower part of the converter, the operator checks the ladle refractory temperature by visually checking the inside of the ladle. Due to the error between workers who are notified and the error between refiners who are notified, and the temperature determination of inaccurate common processes, a separate process for adjusting or adjusting the temperature is not occurred in the secondary refining. There are problems such as delay of working time, deterioration of quality of molten steel and cost increase due to the addition of additives, and the occurrence of workload and manual automation by manual labor.

The present invention is to solve the above problems, the present invention by connecting a wireless temperature measuring device to the sensor installed in the water ladle to measure the temperature of the molten steel in the ladle and the temperature of the air waiting to hold the molten steel in real time and measuring the The results can be wirelessly transmitted and received for converter refining workers to monitor in real time, so that when the molten steel is transferred to the steel ladle, the temperature change of the molten steel can be predicted in advance according to the temperature of the steel, and the tapping temperature is required for the secondary refining. It can maintain the temperature, prevent the increase of refining time due to refining of molten steel, deterioration of molten steel, increase of work process and increase of production cost in post process, reduction of worker load and automation of temperature measurement. It is an object of the present invention to provide a real-time wireless temperature measuring device in a steelmaking ladle.

Features of the present invention for achieving the above object is a wireless temperature measuring device for converting the measured analog data according to the temperature of the molten steel and the air in the ladle into a digital signal for wireless transmission; Steelmaking comprising a wireless receiver for communicating with the wireless temperature measuring device, and a computer for receiving and processing the temperature measurement data detected and transmitted by the wireless temperature measuring device to output to the monitor screen for monitoring the performance of steelmaking and refining operations It is a real time wireless temperature measuring device in ladle.

In the present invention, the wireless temperature measuring device is installed on the side wall of the ladle body, the temperature / signal converter and the conversion program for converting the real-time analog temperature measurement data of the molten steel and empty inside the ladle into the corresponding digital temperature signal measurement value and; It may be preferable that the wireless transmitter converts the converted data into a signal that can be transmitted through a wireless network and transmits the data in real time.

In the present invention, a plurality of the wireless temperature measuring device is installed on the side wall of the ladle body as many as the number of temperature sensor installed on the ladle body, it will be preferably formed integrally on the side wall of the ladle body.

The objects, features and advantages of the present invention will be more readily understood by reference to the accompanying drawings and the following detailed description.

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration of the preferred embodiment of the real-time wireless temperature measuring apparatus in the molten steel and common according to the present invention and the resulting effects.

Figure 3 illustrates a preferred embodiment of the real-time wireless temperature measuring device in the steelmaking ladle according to the present invention, the real-time wireless temperature measuring apparatus according to the present invention, the molten steel and the inside of the ladle in a state that is mounted to the receiving ladle (8) The wireless temperature measuring device 10 detects and wirelessly transmits the temperature measurement data according to the temperature of the common air, and the wireless receiver 21 performs communication with the wireless temperature measuring device, and the temperature measured and detected by the wireless temperature measuring device. It is composed of a computer 22 which receives and processes data and outputs it to the monitor 30 screen for monitoring the performance of steelmaking and refining operations.

FIG. 4 is a detailed configuration diagram of a wireless measuring device 10 integrally mounted on a cross section of the receiving ladle 8 and a side wall of the real-time wireless temperature measuring device according to the present invention of FIG. 3. The temperature measuring module 11 is integrally installed on the main body sidewall of the water receiving ladle 8 to detect the temperature measuring data according to the temperature of the molten steel and the empty ladle inside the water receiving ladle, and the temperature measured by the temperature measuring module. A temperature / signal converter 12 converting the data into a corresponding temperature measurement value, and a wireless transmitter 13 converting the temperature measurement value calculated by the temperature / signal converter into a signal that can be transmitted through a wireless network and transmitting in real time. And a battery which is a power supply source 14 for supplying operating power so that these devices can operate.

At this time, the wireless temperature measuring device, a plurality of pieces are installed at a predetermined height to measure the temperature of the molten steel (9) on the side wall of the body of the receiving ladle (8), the refractory (8a) forming the inner skin of the body of the receiving ladle (8). And the temperature sensor T / C installed through the first and second permanent fields 8b and 8c and the shell 8d forming the outer shell and the temperature measuring module 11 are connected. Here, the enclosure 10a of the wireless temperature measuring device 10, because the temperature of the ladle surface is a high temperature of 240 ~ 300 ℃ it is necessary to use a heat insulating material, the internal temperature of the enclosure is maintained below 80 ℃ through such heat insulation It is preferable.

The present invention configured as described above is made in the secondary refining process of refining molten steel in the steel ladle (6) during the steelmaking refining process, the real-time temperature measurement operation in the molten steel and cola contained in the steel ladle and its effects When described as follows.

That is, the present invention, as shown in Figures 3 and 4, the temperature value measured by the temperature measuring module 11 installed to measure the temperature of the molten steel and the ladle temperature in the steel ladle (8) main body to the temperature / signal converter ( 12) by converting the temperature data of the molten steel and the air in real time through the wireless transmitter 13, the computer 22 wirelessly receives and signal-processed the temperature measurement signal through the wireless receiver 21, Therefore, the operator can recognize the molten steel temperature and the ladle temperature by using the current temperature of the molten steel and the blanks displayed on the output screen of the field operation monitor (30).

In addition, by measuring the temperature value of the steel prepared to contain the molten steel before the molten steel so that it can be recognized by the converter refiner, it is possible to predict the temperature change of the molten steel when the molten steel is transferred to the steel ladle.

Therefore, the operator can predict the degree of future drop in the molten steel according to the temperature of the air waiting for the course, and the molten steel temperature can be adjusted using the predicted degree. It can maintain the target temperature required by.

Therefore, according to the present invention, it is possible to prevent the increase of refining time and the quality of molten steel due to refining work of molten steel, increase of work process and increase of production cost in post process, and to reduce the load of workers and automate temperature measurement. do.

According to the present invention, not only can reduce the cost of using a probe for temperature measurement of the molten steel temperature in the ladle, but also reduce the operating cost by reducing the measurement time, and use real-time molten steel temperature and common ladle temperature information. Therefore, it is possible to expect enormous effects such as reduction of additives (heating materials and cooling materials) added for temperature control of steel and shortening of post-processing time, reduction of separate processes for temperature control, improvement of quality of molten steel, and reduction of load on workers. Will be.

Claims (4)

In the temperature measuring device in the steel ladle, A wireless temperature measuring device for converting the measured temperature analog data according to the temperature of the molten steel and the ladle inside the ladle into a digital signal for wireless transmission; And a computer having a wireless receiver for communicating with the wireless temperature measuring device and receiving and processing the temperature measuring data detected and transmitted by the wireless temperature measuring device to output to a monitor screen for monitoring the performance of steelmaking and refining operations. Real-time temperature wireless measuring device in the steel ladle characterized by. According to claim 1, The wireless temperature measuring device, A temperature measurement module which is integrally installed in the main body of the ladle and detects the analog temperature measurement data according to the temperature of the molten steel and the empty ladle; A temperature / signal converter converting the temperature measurement data detected by the temperature measurement module into a temperature measurement value accordingly; And a wireless transmitter for converting the temperature measurement value calculated by the temperature / signal converter into a signal that can be transmitted through a wireless network and wirelessly transmitting in real time. According to claim 1, The wireless temperature measuring device, As many as the number of temperature sensor installed in the ladle body is provided with a plurality of sidewalls of the ladle body, through the refractory forming the endothelial of the ladle body and the first and second permanent field and the shell forming the outer shell integral with the side wall of the ladle body. Real-time temperature wireless measuring device in the steel ladle, characterized in that formed by. The method of claim 2, wherein the temperature measurement module, Real-time temperature wireless measuring device in the steel ladle, characterized in that made of a thermocouple for generating a thermoelectric power according to the temperature of the molten steel and the common steel.

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