Tangshan Jiahua’s 6.25m ramming coke oven put into operation

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Tangshan Jiahua Coal Chemical Co., Ltd. constructed a new phase featuring four large ramming coke ovens with 46 carbonization chambers each, standing at 6.25 meters in height (the four ovens are numbered 3, 4, 5, and 6). On March 3, 2009, Oven No. 3 successfully produced its first batch of high-quality rammed coke. This oven is currently the one with the highest carbonization chamber height among ramming coke ovens in China. The successful operation of Tangshan Jiahua’s 6.25-meter ramming coke ovens marks the end of the era of China’s largest 5.5-meter ramming coke ovens, enabling the country’s ramming coke production to reach a level where the carbonization chamber height is 6.25 meters. This coke oven utilizes advanced coking technologies and production machinery from both domestic and international sources, as well as sophisticated environmental protection technologies for smoke and dust removal. A multi-hammer fixed rammer is used to compact the coal into coal cakes on the ramming coal-loading and coke-pushing machine, which then feeds them into the carbonization chamber through the furnace door on the machine side in accordance with the operation plan. The large amount of flue gas generated during coal loading is directed through smoke guide vehicles installed on the top of the furnace into the adjacent carbonization chamber that is in the late stage of coking. Coal cakes are processed into coke through high-temperature dry distillation over a coking cycle in the carbonization chamber. The dust generated by coking is captured by the dust collection hood on the coking stopper machine, guided to the ground station through the dust collection main pipe, and discharged into the atmosphere after being purified. The coke oven mechanical tamping coal charging and coke pushing machine is jointly manufactured by adopting the world’s most advanced technology. The ramming coal feeding and coke pushing machine is located on the machine side of the coke oven; coal is fed into its hopper via belt conveyors. During the ramming process, the coal is delivered into the ramming box through the hopper on the machine, using a shaking feeder. An automated ramming system is installed above the ramming box, and a hammer mechanism is used to compact the coal that has been loaded into the box. The coal feeding device then transports the compacted coal cakes from the machine side into the carbonization chamber. The ramming coal-loading coke pusher is equipped with functions such as movement, mechanical coal feeding, residual coal recovery, smoke shielding at the furnace front, a coke pushing mechanism, mechanisms for opening and closing the furnace door, as well as devices for cleaning the furnace frame, furnace bed, and front and rear coals. In addition, it also has the capability to cut coal cakes. The mobile coal feeding device supplies coal to the moving ramming coal-loading coke pusher at any time; a multi-hammer fixed rammer is used to compress the coal inside the coal tank of the ramming coal-loading coke pusher into coal cakes. During this process of forming coal cakes, the operation of the coal-loading coke pusher is not affected by the ramming action, thereby **improving its efficiency**. Other coke oven machinery is designed and manufactured with the principles of advancement, safety, practicality, and reliability, focusing on improving mechanical efficiency, reducing labor intensity, and enhancing the operating environment. It takes advantage of the technical strengths of 6m coke oven machinery in China while also incorporating some of the advantages of 7.63m coke oven machinery. Each unit of the coke oven machinery can be operated manually or via unit program control ； It also employs furnace number identification and an automatic alignment device to achieve safe interlocking among various vehicles. Coke oven machinery also has functions for cleaning the oven doors, frames, and shelves, as well as for collecting and processing end coals and residual coal.