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| Fig. 3 - Slag penetration indexes for the castables with different expansion levels (AM13, AM45 and AM100), after firing in an expansion free environment or under constraint. The benefits on the reduction in the slag penetration index scaled with the MgO grain size (Figure 3). In fact, the result attained for AM100 sample under constraint was close to the one obtained by AM45, which has much lower PLC, with no physical barrier. Figure 4 shows the samples’ cross-sections (AM13, AM45 and AM100) after the cup-tests, which were conducted in an expansion free condition or under constrain. For AM100 composition it is remarkable the infiltration visual difference for both conditions, pointing out a positive effect of inhibiting the expansion and, thus, reducing pores and available room for slag penetration. Table 2 also shows the volume of pores (based on SEM images). A considerable reduction in their pore level was attained for those samples with higher expansion degree (AM45 and AM100), when they were fired under constraint. Such results confirm the densification effect imposed by the alumina- CAC castable physical barrier. |
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cmds1907
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英语留级生: 金币+8, 翻译EPI+1, ★有帮助 2014-09-14 10:45:56
英语留级生: 金币+8, 翻译EPI+1, ★有帮助 2014-09-14 10:45:56
| 图3 -在一个自由膨胀环境或约束条件下燃烧后，具有不同膨胀水平(AM13，AM45和AM100)的浇注料的熔渣渗透指数。熔渣渗透指数减少的好处是随氧化镁粒径(图3)而减少。事实上，获得的AM100样品在约束下的结果与由AM45得到的（结果）接近，在没有物理屏障时PLC要低得多。图4显示了杯试验后样品的横截面图(AM13 AM45和AM100)，在一个自由膨胀环境或约束下进行的。对AM100的组成，值得注意的是两种条件下的渗透的视觉差异，指出来抑制膨胀的正影响，因此，减少气孔和可用熔渣渗透的空间。表2也显示孔体积 (基于SEM图像)。当他们在约束下燃烧时，相当大的减少那些样品的孔隙水平并达到了较高的膨胀程度(AM45和AM100)。这样的结果证实了施加氧化铝- CAC浇注料物理屏障的致密化效果。 |
2楼2014-09-13 23:35:42
