摘要
对原煤中常见的粘土矿物进行了聚沉实验，研究了钙镁离子对煤中存在的主要粘土矿物的聚沉作用，并探讨了其作用机理．结果表明，当入选原煤中易泥化矿物含量高时，如果循环水的总硬度大于４０Ｈ°（德国硬度），则循环水易于澄清；而当循环水的总硬度低于１０Ｈ°，则循环水难以澄清．钙镁离子的临界聚沉浓度远小于钠离子的临界沉聚浓度，而溶液中高浓度的钙镁离子促使粘土矿物颗粒以面－面方式缔结成粒度大。
The influence of Ca2+ and Mg2+ on coagulation of clay minerals in coal was studied. The result shows that in case of a high content of clay mineral in raw coal and a total water hardness greater than 40 H (the German hardness), the circulating water is easy to be clarified; if the water hardness is smaller than 10 H, then it is difficult to be clarified. It also shows that the c.c.c. (critical coagulation concentration) of Ca2+ and Mg2+ is much lower than that of Na+. A high concentration of Ca2+ and Mg2+ in solution makes the clay minerals form coagulates in a facetoface way with a large size and a colse structure.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
1999年第3期296-299,共4页
Journal of China University of Mining & Technology
关键词
循环水
水质硬度
粘土
澄清
选煤厂
circulating water, water hardness, clay minerals, clarification
