氧煤燃烧熔分炉熔渣喷溅数值模拟

针对氧煤燃烧熔分炉在熔炼过程中的喷溅行为,采用Fluent软件中VOF多相流模型耦合Realizable k-ε湍流模型进行数值模拟,利用水模试验加以验证,对熔分炉熔渣喷溅过程进行研究,探究不同工艺参数(流量、倾角、直径和浸没深度)对喷溅高度的影响。结果表明,熔渣喷溅由残余部分动能的气泡逸出破碎产生;随着氧枪流量的增大,其喷溅高度不断增加,流量为0.28 kg/s时喷溅达到3.13 m;倾斜角度增加造成喷溅高度先增加后减小,倾角为-10°时喷溅高度最大为3.07 m;增加氧枪直径,喷溅高度先增大后减小,在直径为30 mm时喷溅最高为3.09 m;减小氧枪浸没深度有利于降低喷溅高度,当浸没深度为150 mm时,喷溅高度约为3.075 m。

Numerical simulation of slag splashing in oxygen coal combustion melting and separating furnace

Aiming at the splashing behavior in the melting process of the oxygen combustion melting and separating furnace, the VOF multiphase flow model coupled with the Realizable k-ε turbulence model in Fluent was used for numerical simulation, which was verified by the water model test. The effects of different process parameters (flow, inclination, diameter, and immersion depth) on splash height were explored. The results showed that the slag splashing was caused by the escape and fragmentation of the residual kinetic energy bubbles. With the increase of the flow of the oxygen lance, the splash height increased continuously, and the splash height reached 3.13 m when the flow was 0.28 kg/s. The maximum splash height was 3.07 m when the tilt angle was -10°. Increasing the diameter of the oxygen lance caused that the spray height was increased first and then decreased, the maximum spray height was 3.09 m when the diameter was 30 mm. Decreasing the immersion depth of the oxygen lance was beneficial to reduce the splash height, when the immersion depth was 150 mm, the splash height was about 3.075 m.