材料期刊网

连铸过程通常采用调节配炭量和配炭方式来调节保护渣的熔化速度和熔融层状结构。本文通过单向加热炉模拟保护渣在结晶器内的熔化过程，研究了六种炭质材料对保护渣熔化速度和熔融结构的影响。结果表明：含量相同时对保护渣熔化速度的控制作用最强的是500目超细石墨，而后依次是：半补强炭黑、390石墨、中超炭黑、土状石墨、增碳剂；配炭方式相同时，保护渣的熔化温度越高，其熔化速度越慢；采用炭黑加石墨的配炭方式时保护渣的烧结层厚度随炭含量增加而减薄，且若炭黑量小于2%时形成多层熔融结构，否则将形成不含半熔层的三层结构。

The melting rate and melting structure of mold fluxes are so important that the carbon material and their addition amounts should been selected cautiously. The melting process of mold fluxes were simulated in an unidirectional furnace so how these six kinds of carbon material influence on the melting rate and melting structure was made clear. The results indicated that the role of different kinds of carbon material to control the melting rate are graphite(500mesh),390graphite,semi-reinforcing carbon black, intermediare-super carbon black, amorphous graphite and carburant successively. It is also can be seen that the melting rate of mold fluxes with lower melting point is more faster than the one with higher melting point while the addition amounts of carbon material are equivalent. And the thickness of sintered layer is reduced with the increase of carbon content. Allocation of carbon black and graphite into the flux, at the same time, the multi-layer melting structure will be formed if the amount of carbon black is less than 2 percent, otherwise three-layer structure is formed.