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先以布袋灰、电炉灰、焦粉、水泥制成冷固结球团,进行高温自还原试验。再以纯水泥试样进行差热试验。最后以纯试剂四氧化三铁和石墨粉,配加纯氧化铝粉末并且不添加粘结剂制成的冷固结球团进行自还原试验。通过检测其抗压强度、扫描电子显微镜-能谱分析等方法分析了粉尘冷固结球团高温复合粘接机理,研究表明:低温下粉尘冷固结球团的强度主要靠水泥粘结相保证,随着温度升高,水泥逐渐失效,在1 000℃后金属铁连晶开始生成,并成为主要粘结相,未熔固态成渣物质对金属铁连晶的形成具有负面的影响,当其含量超过15%时就会对金属体连晶的形成产生显著的影响。
The first bag of ash, electric furnace ash, coke powder, cement made of cold consolidation pellets, high temperature self-reduction test. Then pure cement samples for differential thermal testing. Finally, a pure self-reduction test was carried out with the pure reagent ferroferric oxide and graphite powder, cold-solidified pellets with pure alumina powder added without any binder. The mechanism of high-temperature composite bonding of dust-cooled solidified pellets was analyzed by measuring the compressive strength and SEM. The results show that the strength of the pellets cooled by low temperature is mainly controlled by the cementitious binder phase , With the temperature rising, the cement gradually failed. After 1 000 ℃, the ferrochromium began to form and became the main binder phase. The unmelted solid slag-forming material had a negative effect on the formation of FeNH, If the content is more than 15%, the formation of metal crystals will be significantly affected.