It was proved that the grid inner cover could improve the heat transfer efficiency and throughput of the bell-type annealing furnace.
指出了网格形结构对于提高内罩的换热效率，增加罩式炉的生产能力是有利的。
Excessive convexity, severe wedge, dissymmetric convexity and partial protrusion will result in sticking of sheets during annealing in the bell-type furnace.
热轧板凸度过大，楔形严重，凸度不对称和有局部高点，均可造成罩式炉退火时产生粘结。
A new technology and equipment of annealing and bluing for finished stator and rotor of uncoated cold-rolled electric steel lamination in bell-type hytrogen furnace was introduced.
介绍了无涂层电工钢冲片叠片成型后的电机定子和转子在罩式炉内进行退火和发蓝处理一次完成的新工艺及装置。
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