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首页> 外文学位 >FLUID FLOW, PARTICLE MOTION AND MIXING IN LADLE METALLURGY OPERATIONS.
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FLUID FLOW, PARTICLE MOTION AND MIXING IN LADLE METALLURGY OPERATIONS.

机译：梯级冶金操作中的流体流动，颗粒运动和混合。

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摘要

Extensive computer predictions have been carried out by the author to study flow, addition dispersion and particle motion during central gas injection into cylindrical vessels. In conjunction with numerical computations, experiments were conducted in a 0.30 scale water model of a 150 ton steel processing ladle, using a Froude number scaling criterion. Two typical gas injection configurations (i.e., conventional central injection and C.A.S. alloy addition procedure) were investigated.;To simulate the subsurface motion of additions, spherical wooden balls of various densities were dropped from typical heights, and their subsurface trajectories, immersion times, etc., recorded by means of a video recorder. Frame by frame analysis of the video tapes showed trends which are in good accord with computed trajectories.;Mixing times of simulated molten additions were measured by the conductivity measurement technique. These were compared with prediction from an equivalent tracer dispersion model and excellent agreement achieved.;For industrial application, flow, particle motion, and mixing times in a 150 ton steel processing ladle have been predicted and their technological significance discussed.;Flow visualization studies were carried out using a suspended network of silken threads, mean velocity vectors and overall flow patterns were determined by video recording techniques, while mean velocity vectors and associated turbulence level were also measured with laser doppler velocimetry. These measurements show very reasonable agreement with equivalent numerical predictions.
机译：作者已经进行了广泛的计算机预测，以研究在将气体注入圆柱状容器期间的流量，附加扩散和颗粒运动。结合数值计算，在150吨钢水处理钢包的0.30比例水模型中，使用Froude数值比例标准进行了实验。研究了两种典型的气体注入配置（即常规的中心注入和CAS合金添加程序）；为了模拟添加的地下运动，从典型的高度上放下了各种密度的球形木球，以及它们的地下轨迹，浸入时间等通过录像机录制。录像带的逐帧分析显示出与计算轨迹相吻合的趋势。通过电导率测量技术测量模拟熔融添加物的混合时间。将这些结果与等效示踪剂弥散模型的预测结果进行了比较，并获得了很好的一致性。；对于工业应用，已经预测了150吨钢包中的流量，颗粒运动和混合时间，并讨论了它们的技术意义。通过使用悬浮的丝线网络，通过视频记录技术确定平均速度矢量和总体流动模式，同时还使用激光多普勒测速仪测量平均速度矢量和相关的湍流水平。这些测量结果与等效的数值预测非常吻合。

著录项

  • 作者

    MAZUMDAR, DIPAK.;

  • 作者单位

    McGill University (Canada).;

  • 授予单位 McGill University (Canada).;
  • 学科 Engineering Metallurgy.
  • 学位 Ph.D.
  • 年度 1985
  • 页码 1 p.
  • 总页数 1
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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