Research On Compacting Mechanism And Equipment Development In Coke Loading

Coke is an important fuel for blast furnace smelting, casting and gasification. Due to the small bulk density, varying degrees of mass deficiency problems occur in the process of coke railway transportation, invisibly increase transport costs, and can not give full play to the railway transport capacity, resulting in a serious waste of transport resources.The mainly methods of improving the capacity of railway transportation and reducing the transportation cost are development of heavy haul transportation, development of special vehicles and use auxiliary loading equipment. Heavy haul transportation requires centralized supply and destination and fixed transport routes. Special vehicles are not significant used due to the existence of empty return phenomenon. Using auxiliary loading equipment that could improve the bulk density of goods in loading process through vibration or compaction is the most prevalent method, but the existing auxiliary equipment is poor in density increasing and loading efficiency, and it is easy to lead to material crushing.The dispersion compaction mechanism,the advantages and disadvantages of existing auxiliary loading equipment and vibration equipment have been studied. On this basis, a new type of coke compactness device with vibration and stirring was designed combined with the physical characteristics of coke. The problem of lack compacting depth in the traditional auxiliary loading equipment can be solved by inserting the eccentric rotating shaft with vibration and agitation into the coke. The A-shape support plate can be used to realize automatic ridge.The vibration compactness effect under different amplitude, frequency, eccentricity and rotation speed has been analyzed with the aid of EDEM. The result showed that suitable amplitude is 10 mm, frequency is 50 Hz, eccentricity is 15 mm, and rotational speed is 450deg/s. Additionally, mass deficiency could be effectively reduced with the parameters. On the basis of overall structural design of compacting device, the plate vibratory compactor, rotating shaft supporting part, power and transmission part.have been designed. The diameter of the rope and drum, motor and reducer of each mechanism also have been calculated and selected. The static, modal and harmonic response were analyzed by using the finite element software Workbench. The static analysis showed that the maximum stress of the rotating shaft is 110.6MPa, the maximum stress of plate vibratory compactor is 97.6MPa after improvement. Modal and harmonic response analysis proved that great forced vibration occurs when the excitation frequency is 68 Hz or between 30 to 34 Hz. The adopted excitation frequency is 49.8Hz, which is not within the range. The device does not have obvious resonance, and the structure is safe and reliable.