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桃山选煤厂跳汰机的改造 总被引:1,自引:0,他引:1
桃山选煤厂2002年对跳汰机进行了改造,将原来的LTG-15型筛侧室跳汰机替换为SKT-16型筛下空气室跳汰机。实践证明,采用SKT-16型跳汰机使桃山选煤厂的分选精度和处理能力都有了很大的提高,同时经济效益也有所增加。 相似文献
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在分析研究跳汰机控制过程的基础上,提出了基于粗集理论的跳汰机控制模型。这种控制模型采用床层和水波的跳动高度作为跳汰松散度的表示,利用粗集理论分析影响因素(给料量、给料性质和跳汰频率)。结果表明,能够处理跳汰过程中的不确定和不完整的信息,为跳汰机的智能控制决策提供了一个新的研究途径。 相似文献
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该文分析了峻德选煤厂使用的LTG-15型筛侧空气室跳汰机存在的问题及将原LTG-15型跳汰机更新为SKT-14型数控风阀跳汰机后各项分选指标,叙述了SKT-14型跳汰机的结构特点及使用后带来的经济效益。 相似文献
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Influence of a jigging action on the gravity separation achieved in a teetered bed separator 总被引:1,自引:0,他引:1
Following an extensive program of model system experiments, a laboratory-scale teetered bed separator (TBS), with jigging facility, was operated continually to process a feed containing coal and mineral matter, with a particle size range less than 2.0 mm and greater than 0.25 mm. The first two experiments were conducted as jig runs using a pulsed water supply, controlled at a frequency of 1 Hz. This frequency was considered to provide the best performance in the preliminary work. A third run was conducted as a TBS, with no water pulse. One of the jig runs was conducted using an average fluidisation velocity equivalent to the base level used in the TBS run. In the second jig run the average fluidisation velocity was 60% of that used in the first run. Samples from the three runs were analysed to produce partition curves. These data indicated a very similar separation performance, demonstrating little additional benefit when a cyclic pulse is used to supply the fluidisation water to a TBS. 相似文献
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《Minerals Engineering》2007,20(2):113-123
A mathematical Euler/Lagrangian model based on computational fluid dynamics (CFD) approach is used to simulate the stratification of coal particles in the column jig. Interactions of wide size range and density distributing particles with the fluid have been simulated in the oscillating flow. Fluid motion is calculated by directly solving the Navier–Stokes equations by a SIMPLE approach. Particles are moved in a Lagrangian frame through the action of forces imposed by the fluid and gravity. The magnitude of forces acting on particles has been analyzed and compared. Particle effects on fluid motion are fed back at each time step through calculating the velocity disturbance caused by the particle. Particle–particle and particle–wall collisions are also considered. The simulation captures the essential features of jigging process. It was found that the pulsating amplitude has less effect on stratification on fine particles than frequency does in the jigging. The best stratification is also achieved at some intermediate values of amplitudes and frequencies. 相似文献
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很多塑压模型腔是回转曲面,在加工过程中大多是采用拼合式车削加工,但在加工过程中又常出现接口不平和错位现象。对塑压模型腔回转曲面通用可行的加工工艺和测量、定位的工装夹具的设计进行了分析。 相似文献
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颗粒在跳汰床层中分布形态的研究 总被引:7,自引:1,他引:6
在大量试验的基础上 ,对不同密度颗粒在床层中分布的基本形态进行了归纳 .分析了颗粒分布形态与正态分布的联系和区别 .用四分位模型构成了有效描述颗粒在床层中分布的模型体系 ,并验证大多数分布为非正态分布 相似文献
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隔爆型振动电机地脚螺栓孔钻模设计与分析 总被引:1,自引:1,他引:0
根据隔爆型振动电机产品图纸的要求,确定了振动电机地脚螺栓孔钻模的设计方案。采用有限元分析方法,建立了钻模板的三维计算模型,运用ANSYS软件对钻模板的结构进行计算,求出钻模板的最大变形以及变形所处的位置。分析结果显示,钻模板的结构能够有效地保证钻模的精度,不仅提高了振动电机的产品质量和生产效率,而且降低了生产成本,经济效益显著。 相似文献