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Background

As an important part of the metallurgical industry, the temperature measurement of molten iron is completed by manual observation, thermocouples, and temperature guns. The working environment is harsh, and the temperature of the molten iron needs to be measured many times. The labor intensity is high, the number of temperature measurements is small, and only 1 to 3 times are measured each time the iron is tapped. Continuous temperature measurement cannot be achieved. In addition, thermocouples are consumables, the cost is high, and the operation method is relatively backward. The fluctuation of workers' operating norms makes the monitoring of molten iron temperature not accurate enough, and cannot reflect the temperature situation and change trend of the entire tapping process. In particular, the environment in front of the blast furnace is harsh, high temperature, dusty, and highly dangerous. Since the ironmaking process in the blast furnace is fully enclosed, it is difficult to measure the temperature directly in the furnace. We need to understand and control the temperature state of the molten iron through external temperature measurement.

If the temperature of molten iron is too low, it will affect the smooth operation of the blast furnace. For a long time, it will cause serious consequences such as the furnace body sticking, abnormal furnace shape, abnormal furnace condition and endangerment of safe production. In addition, molten iron temperature detection provides the most direct and effective detection method for low-silicon smelting. Under the premise of ensuring sufficient physical temperature, the silicon content can be reduced as much as possible, thereby reducing the coke ratio, which is beneficial to the steelmaking process. Molten iron temperature is of great significance to blast furnace operation, so it is necessary to establish a safe and intelligent taphole continuous temperature measurement system.

Our company has developed a new type of continuous temperature measurement system for molten iron. This system can directly measure the temperature of the iron flow at the tapping point, eliminate the temperature drop and temperature uniformity caused by the main ditch and slag skimmer, and more directly and accurately represent the state and change process of the physical heat of the furnace. It also has the outstanding characteristics of strong anti-smoke and dust interference ability, long measurement distance, flexible target alignment and accurate measurement.

The measurement results of the molten iron temperature are transmitted to the host computer in the main control room through the signal line, and a special program is used to collect, process, display and store the data.

Product Description

HIRDA-MI molten iron temperature continuous detection system is a high-tech system specially used for detecting molten iron temperature and conducting intelligent analysis. The system consists of a high-temperature infrared thermal imaging thermometer, a field equipment box, an image algorithm server, and a client management software. Each taphole is equipped with a taphole molten iron continuous temperature measurement device. The taphole molten iron continuous temperature measurement device is installed at a suitable position near the taphole and is cooled and dustproofed by compressed air. When tapping iron, the taphole molten iron continuous temperature measurement device can simultaneously obtain the image and temperature of the molten iron flow, can capture clear molten iron flow images, can measure accurate taphole molten iron flow temperature field distribution (including taphole molten iron temperature and iron slag temperature), and display real-time infrared video of the molten iron flow when tapping iron.

The data obtained by the continuous temperature measurement system of molten iron is transmitted to the industrial computer in the main control room of the blast furnace through optical fiber for real-time display of the molten iron temperature and data storage. It can automatically detect the iron-out status of each taphole in real time and record the start time, end time and duration of each taphole.

Advantages

System Features

1. High temperature resistant design, can withstand up to 200℃ ambient temperature；

2. High protection level, protection grade up to IP66；

3. Automatic window cleaning, no need for manual window cleaning；

4. Full-screen real-time temperature measurement with wide coverage；

5. Not only dependent on the system platform, you can directly log in to the web page IP to access images and configurations, and can directly output alarm signals to PLC or alarms；

6. Support GB28181, onvif protocol, can be connected to mainstream NVR；

7. Temperature data can be connected to LED screen and PLC；

8. Electric/automatic focus, focus operation can be performed at any time through software；

9. Temperature range 800℃ to 1800℃;

10. Temperature measurement accuracy ≤1%；

11. Supports modbus protocol and can be connected to DCS system to transmit temperature data.

Product technical indicators

Benefits brought