复吹转炉底吹氧气和石灰粉水模拟

为了考察复吹转炉底吹氧气和石灰粉过程中的熔池特性,建立复吹转炉底吹喷石灰粉的水模型,用水模拟铁水,用空心玻璃微珠模拟石灰粉。利用图像处理法研究了底吹氧气和石灰粉时粉剂分布情况及熔池搅拌情况。采用熔池电导率法考察了相同条件下底吹喷粉与不喷粉时的混匀时间。研究结果表明,喷粉能够促进熔池搅拌,且粉剂扩散速度随底吹载气流量增大而增大;未喷粉时,混匀时间随载气流量增大而减小;在相同底吹载气流量条件下,喷粉时熔池的混匀时间明显低于未喷粉时的混匀时间,且在试验范围内,混匀时间在底吹载气流量为2m^3/h(标准态)时出现极小值。

Water modeling experimenton bottom lime injection base fluxes with oxygen into combined blown converter

In order to research the bath mixing characteristics of the combined blowing converter during the bottom lime injection base fluxes with oxygen, a water model of the combined blown converter with bottom powder injection was established to investigate the powder distribution and the melt bath mixing. Water and hollow glass microspheres were used to simulate liquid iron and lime powder, respectively. The powder distribution and the melt bath mixing were studied using the image processing method. The mixing time of powder injection and the mixing time without powder injection were researched using electrical conductivity detection technology in the melt bath under the same carrier gas flow. The results showed that the bottom lame injection could promote the melt bath mixing, and powder diffusion velocity increased with carrier gas flow increasing. The mixing time without bottom powder injection decreased withcarrier gas flow increasing. Under the same bottom blowing carrier gas flow, the mixing time of bottom powder injection in melt bath was shorter than that without powder injection in the combined blown converter, in the experiment range, blending time of bottom powder injection in melt bath appeared minimum at 2 m3/h of carrier gas flow.