JN43—90型焦炉炉门、炉框、保护板是封闭焦炉炭化室、保护炉体的专用设备。它采用了6m焦炉弹簧门栓的新型结构,使门栓作固定式水平运动,刀边受力更加均匀;另外在炉框上增加了两个支承轮,使炉门在其支承上作滚动运动,避免了因热变形而产生的阻力或炉门悬挂不平的现象,并具 JN43-90 coke oven door, furnace frame, protection board is closed coke oven carbonization room, protect the furnace of special equipment. It uses a new structure of 6m coke oven spring bolt, so that the bolt for the fixed horizontal movement, the blade edge force more uniform; addition in the furnace frame added two support wheels, so that the door on its support for rolling Movement, to avoid the resistance due to thermal deformation or the door hanging uneven phenomenon, and with