Numerical Simulation of Gas–Liquid Flow …
37
Table 2 Model size and experimental parameters
Furnace diameter
(m)
Length (m) Lance diameter
(m)
Liquid level (m) Viscosity (kg/m s)
0.47
3
0.06
0.25
1.01 × 10 −3
and numerical simulation post-processing, it can be seen that the simulation results
in different stages are basically consistent with the experimental results in the shape
change of bubbles in the flow process. Therefore, the numerical simulation method
adopted in this paper can reflect the results.
Simulation Results and Discussion
Analysis of the Volume Fraction of Oxygen in Melt
The control of oxygen volume fraction in the molten bath can prevent the oxidative of
equipment. However, the reaction of mineral particles with too little oxygen content
is incomplete, and the less heat released makes it difficult to maintain the smelting
process. The change of oxygen volume fraction in molten bath is shown in Fig. 2,
the curve of oxygen volume fraction in 10 s.
From the results of the analysis in Fig. 2, it can be seen that the volume fraction of
oxygen in the molten bath increases continuously from the beginning of gas injection
until 1 s, reaching a peak value of 5.2%. Because part of the gas spilled out, reaction,
and at the same time continuously into the molten bath, so in a period of time after
the gas content reached equilibrium. The volume fraction of oxygen in the molten
bath begins to decrease and finally stabilizes at about 4% after a period of fluctuation.
Therefore, it can be considered that 4% of oxygen in the molten bath will exist in
the melt and participate in the reaction between mineral particles.
Fig. 2 Volume fraction curve of oxygen in melt
37
Table 2 Model size and experimental parameters
Furnace diameter
(m)
Length (m) Lance diameter
(m)
Liquid level (m) Viscosity (kg/m s)
0.47
3
0.06
0.25
1.01 × 10 −3
and numerical simulation post-processing, it can be seen that the simulation results
in different stages are basically consistent with the experimental results in the shape
change of bubbles in the flow process. Therefore, the numerical simulation method
adopted in this paper can reflect the results.
Simulation Results and Discussion
Analysis of the Volume Fraction of Oxygen in Melt
The control of oxygen volume fraction in the molten bath can prevent the oxidative of
equipment. However, the reaction of mineral particles with too little oxygen content
is incomplete, and the less heat released makes it difficult to maintain the smelting
process. The change of oxygen volume fraction in molten bath is shown in Fig. 2,
the curve of oxygen volume fraction in 10 s.
From the results of the analysis in Fig. 2, it can be seen that the volume fraction of
oxygen in the molten bath increases continuously from the beginning of gas injection
until 1 s, reaching a peak value of 5.2%. Because part of the gas spilled out, reaction,
and at the same time continuously into the molten bath, so in a period of time after
the gas content reached equilibrium. The volume fraction of oxygen in the molten
bath begins to decrease and finally stabilizes at about 4% after a period of fluctuation.
Therefore, it can be considered that 4% of oxygen in the molten bath will exist in
the melt and participate in the reaction between mineral particles.
Fig. 2 Volume fraction curve of oxygen in melt