炼镍转炉溅渣护炉的水模试验

利用1/4水力学模型试验研究炼镍转炉溅渣工艺参数对炉衬各部位溅渣量的影响。结果表明:溅渣时间和炉体倾角是影响溅渣总量的显著性因素,且与之成正比关系。溅渣量分布受炉体角度和初始熔池深度影响较大,当炉体角度由-10°增至-30°或初始熔池深度(h/D)由0.078增至0.172时,风口对面的溅渣量比例由80%急剧降为5%左右,风口面和端墙面溅渣量相应增大。溅渣高度随着炉体角度和初始熔池深度增加而降低。溅渣模式分为喷溅、渣涌或两者共存。溅渣过程通过调整炉体倾角,可以实现较大的溅渣总量和均匀的分布。工业溅渣试验验证了水模型的研究结果,风口粘结过多等问题得到了解决。

Hydraulic simulation of slag splashing in nickel converter

The influences of operational conditions on slag splashing for the lining of nickel blowing converter were investigated with an 1/4 scale hydraulical model experiment.The results show that the time of gas blowing and the angle of furnace play a significant role in total amount of splashes in direct ratio.The distribution of splashes is largely decided by the furnace angle and the initial bath depth.Proportion of splashes on opposite side of tuyere line is dramatically reduced from 80% to 5% or so when the furnace angle or the initial bath depth(h/D) varies from -10° to -30° or 0.078 to 0.172,meanwhile those on side of the tuyere line and the side end are greatly increased;the height of splashing decreases with the tuyere and initial bath depth increasing.The mode of slag splashing can be defined as the injection slag splashing and surging slag splashing or two both.Large amount and even distribution on different walls are acquired by adjusting angle of furnace at definite bath depth.The industrial test agrees well with the results in the model,and the problems such as heavy accretion on tuyere line are also resolved.