Preheating zone with taper design, use heaters heating, temperature can control, can meet all kinds of insulation varnish requirements.
预热区使用加热器加热，温度可控，可满足各种绝缘需求。
The non-oxidizing zone is consisted of entry sealed room, waste gas preheating zone, direct heating zone, and furnace nozzle and flue gas exhausting system.
无氧化段由入口密封室，废气预热区，直接加热区，炉喉，废气排放系统组成。
Original preheating temperature: the temperature of the workpiece in the weld zone immediately prior to any welding operation.
初始预热温度是指任何焊接操作开始之前，焊接区域内工件的瞬时温度。
Specially designed air knife can prevent the flux from entering the preheating zone causing fire and remove excessive flux.
特制风刀设计，防止松香进入预热区产生火灼以及将多余松香排掉。
It is divided into preheating zone, heating zone, heat preservation zone and natural cooling.
炉体分为预热区、加热区、保温区、缓冷区。
Oven consist of two zone, preheating, solidify zone, and with high speed hot air recirculation system.
烘炉包括2个区域，预热、巩固区域和高速空气循环系统。
The results show that the output of PSF is not increased monotonously with the increase of roasting zone′s width and preheating-roasting zone′s height.
研究表明，竖炉产量并非随焙烧带宽度和火口中心线上料层高度的增加而一味增加，焙烧带宽度和火口中心线上料层高度均存在最佳值；
The reasons of forming temperature difference of preheating. zone of tunnel kiln and the ways to improve it are discussed, and suggest is put.
就隧道窑预热带上下温差产生的原因及其改善措施进行了论述，并提出了建议。
Temperature difference from top to bottom in preheating zone of tunnel kiln is the biggest obstacle for rapid firing, energy saving.
隧道窑预热带内上下温差过大是实现快速烧成、节能降耗的最大障碍。
The results show that:under the no preheating condition, the microstructure of weld metal is columnar austenitic, and brittle martensite exists in the fusion zone and over-heated zone unavoidably.
研究结果表明：在不预热条件下，用KD286焊补钢轨，焊缝组织为柱状奥氏体组织，熔合区和过热区不可避免地产生脆硬的马氏体组织。
The results show that:under the no preheating condition, the microstructure of weld metal is columnar austenitic, and brittle martensite exists in the fusion zone and over-heated zone unavoidably.
研究结果表明：在不预热条件下，用KD286焊补钢轨，焊缝组织为柱状奥氏体组织，熔合区和过热区不可避免地产生脆硬的马氏体组织。
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