| The 6.25m Stamping Charging Pushing machine (hereinafter called SCP machine for short) is a heavy mechanical machine utilized in the field of metallurgy and coke making and is regarded as the most advanced stamping coke oven machinery in the world now. The core technology of this 6.25m SCP machine lies on its coal charging mechanism, whose main function is to ensure coal cake forming stability and smooth charging of coal into the oven chambers. This coal charging mechanism features high integrity, high automation level, short operation cycle, environment friendly and energy conservation. The technology for design and manufacturing of SCP machine and its coal charging mechanism has always been monopolized by KOCH from Germany, thus the price of SCP machine remains high. Therefore, the development of 6.25m SCP machine and coal charging mechanism with independent intellectual properties is of great significance, since it not only spares the trouble of import, but also save the cost for technological cooperation with foreign companies. In addition, as the country continues to put greater importance to environment protection, high quality coking coal resource is decreasing and demands of coking plants for large automatic coking machinery keep growing, it is sure that the 6.25m SCP machine has a great prospect in the future. Therefore, this study has great value for application.The study of this paper was carried out on the 6.25m SCP machine developed by a coking plant as the subject of research. Through complete digestion of advanced technologies from Germany and incorporation of successful experiences in design of coke oven machinery in the past, the coal charging technology with independent intellectual property was finally achieved upon our audacious innovation.Thanks to the research on features of stamping coking technology and coal cake forming principle, this design ensured stable forming of coal cakes. The guide parameters for optimum coal proportioning were also made available to customers on the basis of accumulated experiences on stamping coking.The stamping coal bin support structure was analyzed and calculated through modeling via Solidedge ST3 software and ANSYS finite element software. Optimum design was resulted by comparing the strength and rigidness of steel structure of original 5.5m stamping coal bin with that of the new stamping coal bin. The utilization ratio of structural materials was enhanced and their weight was reduced, thus the production cost cutting was achieved.The stability during coal cakes being charged into oven chamber was enhanced through improvement of coal wall opening mode, front baffle opening mode, rear baffle locking mode, precise selection of coal charging motor, drive mode of coal charging, as well as chain tensioning device of the coal charging mechanism.The sealing device for coal charging was also improved through investigation at clients’ site for cause of gas emission during coal charging and analysis of demerits of existing coal charging sealing devices. Thus, the pollution caused by escaped gas from coal cakes during coal charging process was effectively prevented.Through the study in this paper, the domestic technology for stamping coal charging mechanism was uplifted to the world advanced level and the technological barrier was broken down, which promoted the development of domestic large stamping coking machinery. |
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