摘要
KCl–K2SO4–Na2SO4系统低温融体是引起新型干法水泥预分解系统结皮堵塞至关重要的因素。融体的熔点越低,低温融体对粉状物料的粘结能力越强,因而对结皮堵塞的影响也越大。用化学试剂和实验电炉进行实验,绘制了KCl–K2SO4–Na2SO4低温融体形成的温度范围图。结果表明:KCl–K2SO4–Na2SO4三元系统共融温度<800℃,最低共融温度<500℃,相当大范围的共融温度在500～700℃。在Na2SO4含量较高的情况下共融温度低,预示其对结皮影响比K2SO4的更大。
The eutectic mixture of KCl- K2SO4 - Na2SO4 system is a crucial factor causing buildups in preheating-decomposition systems during the drying process. The lower the melting point of the melts is, the larger the capability of powdery mass that sticks in the melt is, therefore, the greater effects on buildups. The temperature range of the eutecfic mixture formation for KCl - K2SO4 - Na2SO4 system was tested and illustrated by chemical agents and an experimental electrical stove. The results show that, for the three-component system comprising KC1 - K2SO4 - Na2SO4, the eutectic point is less than 800 ℃,while the minimum eutectic point is less than 500 ℃. The major range of the eutectic point is 500 -- 700 ℃. The eutectic point is lower at a higher content of Na2SO4, indicating that the Na2SO4 has a greater effect on buildups than K2SO4.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2006年第4期504-506,共3页
Journal of The Chinese Ceramic Society
基金
"863"计划(2002AA335050)资助项目。
关键词
水泥
预分解系统
低温融体
结皮
氯化钾-硫酸钾-硫酸钠系统
cement
preheating-decomposition system
eutectic mixture
buildups
potassium chloride - potassium sulphate - sodium sulphate system
