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首页> 外文期刊>ISIJ international >DEM Simulation of Collapse Phenomena of Packed Bed of Raw Materials for Iron Ore Sinter during Charging
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DEM Simulation of Collapse Phenomena of Packed Bed of Raw Materials for Iron Ore Sinter during Charging

机译：铁矿石烧结矿装料填充床崩塌现象的DEM模拟。

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The collapse phenomena like an avalanche of sinter bed during charging of raw materials in the iron ore sintering are often observed. The collapse phenomena strongly influence the size segregation of raw materials in sinter bed, permeability and productivity of sinter. The reasons why collapse phenomena of the sinter bed during charging occur in the iron ore sintering have been discussed using the simulation by DEM (Discrete Element Method) in this work. As factors causing the collapse phenomena, there could be the granule shape of raw materials charged and the adhesion between the granules. First of all, a simulation model which is considered the adhesion force between the granules has been developed. The charging behavior of raw materials on the sintering machine was simulated by DEM. Effects of the adhesion force on deposition and collapse phenomena of the sinter bed were investigated. The deposition angle of the sinter bed obviously increases and the collapse phenomena of granules are clearly observed when the adhesion force was introduced into the granules. The ridges on the surface of the sinter bed which are feature of the collapse phenomena are confirmed. Therefore one of the reasons why the collapse phenomena occur during charging of the raw materials into the sintering machine would be adhesion of granules.
机译：在铁矿石烧结过程中，通常会在原料装入过程中观察到像烧结床崩塌这样的崩塌现象。崩塌现象强烈影响烧结床中原料的尺寸偏析，渗透率和烧结矿的生产率。在这项工作中，使用DEM（离散元法）进行了模拟，讨论了在铁矿石烧结过程中发生装料过程中烧结床坍塌现象的原因。作为导致崩塌现象的因素，可能是所装原料的颗粒形状和颗粒之间的粘附性。首先，已经开发了被认为是颗粒之间的粘附力的模拟模型。用DEM模拟了烧结机上原料的装料行为。研究了粘附力对烧结床沉积和崩塌现象的影响。当将粘附力引入颗粒中时，烧结床的沉积角明显增加，并且清楚地观察到颗粒的塌陷现象。确认了烧结床表面上具有塌陷现象的脊。因此，在将原料装入烧结机的过程中发生坍塌现象的原因之一是颗粒的粘附。

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