摘要
通过改变灼烧温度和停留时间,研究了不同灼烧方式下稻壳灰形貌特征和成分的变化规律。采用先低温后高温灼烧方式可得到含碳量较低的稻壳灰,不同的灼烧方式形成的稻壳灰颗粒的微观形貌特征不同,直接高温燃烧成灰粒径明显大于其他方式成灰粒径。灼烧温度低于575℃制取的稻壳灰中主要成分是非晶型的SiO2,而灼烧温度达到815℃制取的稻壳灰均有明显的SiO2晶体存在,采用先低温后高温的灼烧方式,稻壳灰中钾的含量低于其他灼烧方式。
In order to obtain the best process for rice husk combustion, the morphological characteristics and composition of rice husk ash （RHA） were studied by changing calcination temperature and residence time. The research on morphology characteristics showed that the carbon content of RHA was lower when adopted the mode of first lower temperature combustion then higher temperature combustion. The microscopic morphology of RHA was different by using different calcination methods. The particle size of RHA by direct higher temperature combustion was significantly larger than that by other methods. For the component of RHA, the main ingredient of RHA was amorphous SiO2 by lower temperature（575~C ） combustion while silica form crystal when preparation process existed in higher temperature （815~C） combustion stage, and the potassium content of RHA was relatively lower by using the mode of first lower temperature combustion then higher temperature combustion.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2013年第4期131-136,共6页
Transactions of the Chinese Society for Agricultural Machinery
基金
黑龙江省自然科学基金资助项目(1307396)
沈阳市科学技术计划资助项目(090102)
关键词
稻壳灰
灼烧方式
形貌特征
成分
灰度
Rice husk ash Calcination method Morphological characteristics Composition Grayvalue
