Zadorozhniy S. Development of means for localizing dust emission during handling operations at outdoor storages of iron-ore pellets.

The thesis deals with the development of aspiration means for reducing unorganized dust emission during handing operations at outdoor storages of iron-ore pellets. Some mechanisms of dust spread and intensity of dust emission from surface sources of continuous operation have been established. It has been proposed that sedimentation of the dust from dust-air flow be taken into account when defining dust emission intensity of the surface source. The dynamic interaction of the granular material flow and the air inside the protector has been investigated for the first time using concurrent and countercurrent schemes of aspiration. There has been proved energy expediency of using a concurrent scheme of aspiration of a stationary type protector. Some dependences for defining the amount of the air ejected into the protector by the granular material have been determined with formation conditions of the flow entering a protector taken into account. Some criteria of forming a zone of circulation of the air ejected into a protector have been determined. There has been established an influence of the wind on the productivity of local suckers. Built-in autonomic systems of aspiration have been designed. There has been determined the effectiveness of the means of dust control of the storage equipment.