1.Importance

The temperature of molten iron is an important parameter for the blast furnace operation. The continuous temperature measurement system for molten iron adopts the principle of infrared temperature measurement, which continuously measures the flow of molten iron sprayed from the taphole, eliminating the temperature drop and average temperature effect caused by the main channel and slag skimmer, and more directly and accurately representing the thermal state and change trend in the furnace hearth. By obtaining the temperature curve of the tapping process, accurately determine the trend of furnace temperature changes, and take corresponding control measures to maintain the stable operation of the blast furnace.

The system has outstanding features such as strong resistance to smoke and dust interference, long measurement distance, remote alignment of measurement points, and accurate measurement results, making it an essential monitoring method for modern blast furnace production.

2.Main parameters

① Model：HMTM-IV

② Measurement range：1000~2000℃

③ Measurement accuracy：±0.5%

④ Maximum measurement distance：≤20m

⑤ Angle adjustment accuracy: stepless

⑥ Power supply：220VAC，3A

⑦ Cooling gas: compressed air followed by nitrogen, with a single probe gas consumption of about 5Nm3/h, pressure>0.4MPa, room temperature

3.System composition

① Temperature measuring probe (with video): 4 sets

② Control pan tilt: 4

③ Power distribution box: 4 sets

④ Industrial computer: 1

⑤ Monitor: 1

⑥ Special software: 1 set

⑦ Transmission cable: 4 sets

4.Main functions of software

① Continuously display the temperature change curve of the entire tapping process.

② Display the current temperature value and average temperature.

③ Display the start time, end time, and duration of tapping.

④ Query past tapping curves and data.

⑤ Display video images of temperature measurement points, and remotely adjust the position of temperature measurement points.

⑥ Perform fault diagnosis on the probe and display fault information.

⑦ Temperature measurement data and main screen are stored for a long time.

⑧ The current temperature value of each measuring point is output as a signal of 4-20mA.

5.Application

This system has been successfully applied in blast furnaces of multiple enterprises, including Shougang Jingtang, Baosteel, Shangang Rizhao Steel, Hegang Laoting Blast Furnace, Baogang, Nangang, Laigang, Sangang, Xinyu Steel, Jinnan Steel, Jiyuan Steel, Tangshan Donghua, Hebei Jinxi, etc.