技术
3结论
不论灰化温度高低，随着麦秆的添加，混合灰的烧结温度都呈现降低趋势，但降低幅度略有差别。此外，灰化温度较低时混合灰的烧结温度低于灰化温度较高条件下混合灰的烧结温度。
SEM分析表明，低温灰化得到的样品中出现较多不规则的纤维结构形貌。而较高温度下获得的灰样中则出现较多致密的球状颗粒，这表明矿物质发生熔融形成球状颗粒。EDS分析可知，添加了麦秆的低温灰化的混合灰样中含有较多的K、Na元素，而较高灰化温度时麦秆中的Na、K元素挥发，Ca和Fe元素的含量没有升高反而降低，这说明灰中发生了熔融现象。
XRD分析表明，低温灰化的烧结后的煤和麦秆混合灰样中因含有较多的含钾等碱金属系助融矿物质，导致混合灰样的烧结温度降低。然而，像钙长石等含钙矿物质本身具有较高的熔点，因而，在1100℃时煤和麦秆混合灰样具有较高的烧结温度。
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