Numerical Simulation of Heat Transfer of High-Temperature Slag Flow Inside the Blast Furnace Slag Trench

To investigate the flow and heat transfer process of blast furnace slag through the slag trench after the slag is discharged, a three-dimensional physical model is established and simulated according to the actual size of the slag trench and the physical properties of the high-temperature slag. The temperature field and flow field distribution of the high-temperature slag liquid inside the slag trench is obtained by numerical simulation under different working conditions, and the effects of operating conditions such as slag trench inclination, high-temperature slag inlet flow rate, and inlet temperature are investigated. The results show that the flow rate of high-temperature slag is related to the slope of the slag trench, the greater the slope of the slag trench, the higher the flow rate of high-temperature slag, in which the highest average speed can reach 2.23 m/s when the slope is 8%; changing the inlet flow rate, flowing through the slag trench, the high-temperature slag reaches the highest flow rate at the same position, the overall flow rate changes tend to rise first and then decrease, and the greater the inlet flow rate, the higher the temperature change of high-temperature slag. The higher the inlet flow rate, the higher the temperature change of high-temperature slag, the higher the temperature of high-temperature slag out of the slag trench; the higher the inlet temperature, the higher the overall flow rate of high-temperature slag, and the position of the highest flow rate is relatively backward.