Temperature measuring device and control method for electric smelting magnesite furnace based on temperature strategy

Abstract

The application relates to a temperature measuring device for a temperature strategy-based electric smelting magnesia furnace, which comprises an electric smelting magnesia furnace shell, a trolley, an electrode, an electrode holder, and a motor control system, the electrode holder is lifted through steel wire rope traction, and the motor control system is a control system of a steel wire rope driving motor; the trolley is provided with a plurality of through holes which are communicated with the inside of the electric smelting magnesia furnace, a temperature measuring device is arranged in the through holes, the temperature measuring device is connected with a data collection and processing device, the data collection and processing device is connected with a control console through wireless signals, and the control console sends instructions to the motor control system. Compared with the prior art, the application has the beneficial effects that the application can complete the electric smelting magnesia furnace control based on the temperature strategy, meanwhile, the furnace bottom temperature in the production process is monitored, the energy loss in the production process is reduced, the production efficiency and the production quality of products are improved, and the production cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of fused magnesia production equipment technology, and in particular to a temperature measuring device and control method for fused magnesia furnaces based on a temperature strategy. Background Technology

[0002] The production of fused magnesia from magnesite employs the electric arc melting method. This involves using electrodes to generate a high-temperature electric arc in different types of fused magnesia furnaces to heat the raw material. The material melts, forming a molten pool, and gases escape. Finally, the electrodes are removed, and the molten magnesia cools and crystallizes, yielding fused magnesia crystals with varying properties. my country is a major producer of fused magnesia, ranking first in the world in annual exports, and holds a pivotal position in the global fused magnesia production landscape.

[0003] The main problems of the fused magnesia industry include: it is located in the low-to-mid range of the product structure with low added value; outdated technology and equipment, resulting in serious waste of resources and energy; a harsh production environment that is not environmentally friendly; outdated control methods and a lack of systematic operating procedures; insufficient attention to scientific research within the industry and a lack of focus on innovation among enterprises.

[0004] Currently, there is still a significant gap between domestic equipment and production processes and those of developed countries. Developed countries produce high-grade fused magnesia with low energy consumption and minimal environmental impact. Areas that can be learned from developed countries include: adopting automated feeding systems and a high degree of automation throughout the entire process. Compared to manual, experience-based operations, this results in higher precision and a lower error rate. Foreign countries, in pursuit of high-grade fused magnesia products, typically perform secondary purification and refining of low-grade fused magnesia, optimizing the molten aggregate cooling and crystallization time during the crystallization process to increase the yield of large-size crystals and enhance product added value. Modern, fully enclosed fused magnesia production processes are employed, resulting in high power, large capacity, high efficiency, and reduced average unit consumption. The fully enclosed structure ensures near-zero emissions of dust and gases, while also reducing heat dissipation pollution. Residual raw materials and heat are recovered, improving resource utilization and working conditions for operators.

[0005] Therefore, in order to address the current problems of high energy consumption, environmental unfriendliness, and significant heat loss in fused magnesia furnaces, it is essential to design a temperature measurement device and control method for fused magnesia furnaces based on a temperature strategy. Summary of the Invention

[0006] The purpose of this invention is to provide a temperature measurement device and control method for an fused magnesia furnace based on a temperature strategy. This invention addresses the problems of existing fused magnesia furnaces lacking a temperature measurement system and relying solely on current and voltage for production process control. Unlike traditional fused magnesia furnaces that use current to control the production process, this invention mounts a thermocouple sheathed on a trolley and inserts it into the bottom of the fused magnesia ingot for temperature measurement. The thermocouple is connected to a data collection and processing device, transmitting data wirelessly. The control system receives the transmitted data via a wireless signal receiver, thereby controlling the production process. When the measured temperature rises, the corresponding electrode rises; when the measured temperature falls, the corresponding electrode falls, completing the temperature strategy-based control of the fused magnesia furnace. This device can achieve temperature strategy-based control of the fused magnesia furnace while simultaneously monitoring the furnace bottom temperature during production, reducing energy consumption, improving production efficiency and product quality, and lowering production costs.

[0007] To achieve the above objectives, the present invention employs the following technical solution:

[0008] A temperature measuring device for an fused magnesia furnace based on a temperature strategy includes a furnace shell, a trolley, electrodes, an electrode holder, and a motor control system. The electrode holder is lifted and lowered by a steel wire rope, and the motor control system is a control system for a steel wire rope-driven motor. The trolley has several through holes communicating with the interior of the fused magnesia furnace. Temperature measuring devices are installed in the through holes, and the temperature measuring devices are connected to a data collection and processing device. The data collection and processing device is connected to a control console via a wireless signal, and the control console sends commands to the motor control system.

[0009] The temperature measuring device includes a thermocouple and a sleeve. The sleeve is installed in the through hole of the trolley, and the thermocouple is inserted into the sleeve. The thermocouple is electrically connected to the data collection and processing device.

[0010] The bottom of the sleeve is fixed with a base plate, and the base plate is provided with bolt holes. The sleeve is inserted into the through hole of the trolley from bottom to top, and the base plate is fixedly connected to the trolley by bolts.

[0011] The through holes are arranged in two rows, with three through holes in each row. The middle through hole in each row corresponds to the center of the upper middle electrode, and the remaining two through holes in the row are symmetrically distributed, 1200mm away from the center hole.

[0012] A method for temperature control of an electric fused magnesia furnace temperature measuring device based on a temperature strategy includes the following steps:

[0013] 1) During the production process of fused magnesia furnace, temperature data is collected by thermocouples and transmitted to the data collection and processing device via wired connection. The data collection and processing device then transmits the data via a wireless signal transmitter to complete the data collection process.

[0014] 2) The control console receives temperature data through a wireless signal receiving device, stores and processes the temperature data, and sends control commands to the motor control system to control the insertion depth of the electrodes in the material to control production, ultimately changing the temperature in the production process and completing the data processing process.

[0015] Compared with existing technologies, the beneficial effects of this invention are:

[0016] 1) This invention can achieve temperature-based control of fused magnesia furnaces, while monitoring the furnace bottom temperature during production, reducing energy consumption during production, improving production efficiency and product quality, and lowering production costs.

[0017] 2) This invention monitors temperature while transmitting data wirelessly, reducing the complexity and difficulty of wiring. Data transmission continues even as the trolley moves. If necessary, the data collection and processing device and the wireless transmitter can be fixed to the trolley and move with it. Thermocouples are positioned at the bottom rather than on the side to prevent damage during material feeding. The thermocouples pass through the trolley into the furnace bottom, facilitating installation and use. An external sleeve extends the thermocouple's lifespan and reduces electromagnetic interference. Traditional control methods mostly use current and voltage as control strategies and cannot obtain temperature information. This invention provides a temperature reference for the fused magnesia furnace production process control while monitoring temperature, thus enabling more precise control of the production process. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the through hole at the bottom of the trolley of the present invention;

[0020] Figure 3 This is a schematic diagram of the sleeve structure.

[0021] In the diagram: 1-Electrode holder, 2-Electrode, 3-Furnace shell, 4-Material, 5-Trolley, 6-Temperature measuring device, 7-Data collection and processing device, 8-Control console, 9-Motor control system, 10-Wire rope, 11-Through hole, 12-Bolt hole, 13-Sleeve, 14-Thermocouple. Detailed Implementation

[0022] The embodiments of the present invention will be further described below with reference to the accompanying drawings:

[0023] See Figures 1-3A temperature measuring device for an fused magnesia furnace based on a temperature strategy includes a furnace shell 3, a trolley 5, an electrode 2, an electrode holder 1, and a motor control system 9. The electrode holder 1 is lifted and lowered by a steel wire rope 10, and the motor control system 9 is a control system for the motor driven by the steel wire rope 10. The trolley 5 has several through holes 11 that communicate with the interior of the fused magnesia furnace. Temperature measuring devices 6 are installed in the through holes 11. The temperature measuring devices 6 are connected to a data collection and processing device 7. The data collection and processing device 7 is connected to a control console 8 via a wireless signal. The control console 8 sends commands to the motor control system 9.

[0024] The temperature measuring device 6 includes a thermocouple 14 and a sleeve 13. The sleeve 13 is installed in the through hole 11 of the trolley 5, and the thermocouple 14 is inserted into the sleeve 13. The thermocouple 14 is electrically connected to the data collection and processing device 7.

[0025] The bottom of the sleeve 13 is fixed with a base plate, and the base plate is provided with bolt holes 12. The sleeve 13 is inserted into the through hole 11 of the trolley 5 from bottom to top, and the base plate is fixedly connected to the trolley 5 by bolts.

[0026] The through holes 11 are arranged in two rows, with three through holes in each row. The middle through hole in each row corresponds to the center of the upper middle electrode. The remaining two through holes in the row are symmetrically distributed and are 1200mm away from the center hole.

[0027] A method for temperature control of an electric fused magnesia furnace temperature measuring device based on a temperature strategy includes the following steps:

[0028] 1) During the production process of the fused magnesia furnace, temperature data is collected by thermocouple 14 and transmitted to data collection and processing device 7 via wired transmission. Data collection and processing device 7 transmits the data through wireless signal transmitter to complete the data collection process.

[0029] 2) The control console 8 receives temperature data through a wireless signal receiving device, stores and processes the temperature data, and sends control commands to the motor control system 9, thereby controlling the insertion depth of the electrode 2 in the material 4 to control production, and ultimately changing the temperature in the production process to complete the data processing process.

[0030] The diameter of the through hole 11 at the bottom of the trolley 5 matches the diameter of the sleeve 13. A thermocouple 14 is placed inside the sleeve 13, and the other end of the thermocouple 14 is connected to the data collection and processing device 7 via a wire, transmitting data wirelessly. The electrode 2 above the fused magnesia furnace is raised and lowered by a motor control system 9, which is connected to a control console 8. The control console 8 receives and processes data via a wireless signal receiver, adjusting the electrode based on temperature data combined with current and voltage data. This system can simultaneously collect, record, process, and execute corresponding strategies.

[0031] The motor control system 9 is connected to the control console 8 and the wire rope 10. The motor control system 9 performs corresponding operations based on the control commands from the control console 8.

[0032] The motor control system 9 is connected to the electrode holder 1 by a steel wire rope 10, and the electrode 2 is held by the electrode holder 1.

[0033] The trolley 5 and the material 4 are opened at the position of the through hole 11, and the opening diameter is the diameter of the sleeve 13.

[0034] The interior of the furnace shell 3 contains material 4.

[0035] For the data collection and processing device 7 (JK3000 multi-point thermometer): it is connected to thermocouple 14 to collect temperature data and transmits the data through a wireless signal transmitter (IOT104R wireless receiver).

[0036] For console 8: temperature data is received via a wireless signal receiver (IOT104R wireless receiver), and the temperature data is stored and processed by a microcomputer.

[0037] The working process of this invention is as follows:

[0038] First, for the data acquisition process, a through hole 11 is drilled at the bottom of the material 4 according to the opening position. Then, the sleeve 13 is fixed to the trolley 5, and the thermocouple 14 is inserted. The thermocouple 14 is connected to the data collection and processing device 7 to complete the installation. During the production process of the fused magnesia furnace, temperature data is collected by the thermocouple 14 and collected by the data collection and processing device 7. The data is then transmitted through the wireless signal transmitter to complete the data acquisition process.

[0039] For the data processing process, the control console 8 receives temperature data through a wireless signal receiving device, stores and processes the temperature data, integrates the current and voltage data in the electrode production process to form a temperature-based strategy to adjust the production process, and sends control commands to the motor control system 9 to control the insertion depth of the electrode 2 in the material 4 to control the production, and finally changes the temperature in the production process to complete the data processing process.

[0040] Through data acquisition and processing, real-time control of the fused magnesia furnace based on temperature strategy is achieved, thereby improving the control accuracy and production efficiency of the fused magnesia furnace.

[0041] The present invention has been described above with reference to the accompanying drawings, but the present invention is not limited to this usage. Various modifications, variations and substitutions made to the present invention without departing from the spirit and principle of the present invention should be within the protection scope of the present invention.

Claims

1. A temperature measuring device for an fused magnesia furnace based on a temperature strategy, comprising a furnace shell, a trolley, electrodes, an electrode holder, and a motor control system, wherein the electrode holder is lifted and lowered by a steel wire rope, and the motor control system is a control system for a steel wire rope-driven motor; characterized in that, The trolley is provided with several through holes that communicate with the interior of the fused magnesia furnace. Temperature measuring devices are installed in the through holes. The temperature measuring devices are connected to a data collection and processing device. The data collection and processing device is connected to the control console via a wireless signal. The control console sends instructions to the motor control system. The temperature measuring device includes a thermocouple and a sleeve. The sleeve is installed in the through hole of the trolley, the thermocouple is inserted into the sleeve, and the thermocouple is electrically connected to the data collection and processing device. The bottom of the sleeve is fixed with a base plate, and the base plate is provided with bolt holes. The sleeve is inserted into the through hole of the trolley from bottom to top, and the base plate is fixedly connected to the trolley by bolts. The through holes are arranged in two rows, with three through holes in each row. The middle through hole in each row corresponds to the center of the upper middle electrode, and the remaining two through holes in the row are symmetrically distributed. The method for temperature control of the temperature measuring device for an fused magnesia furnace based on a temperature strategy includes the following methods: 1) During the production process of fused magnesia furnace, temperature data is collected by thermocouples and transmitted to the data collection and processing device via wired connection. The data collection and processing device then transmits the data via a wireless signal transmitter to complete the data collection process. 2) The control console receives temperature data through a wireless signal receiving device, stores and processes the temperature data, and sends control commands to the motor control system to control the insertion depth of the electrodes in the material to control production, ultimately changing the temperature in the production process and completing the data processing process.

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