一种中、低温热液蚀变作用。主要为粘土化作用和绢云母化作用，常分布在蚀变带的上部。
misc. pelitization
软岩的崩解、泥化往往给工程带来困难和损失。
The disintegration of soft rock often causes great difficulty to engineering.
矿石的上述特性造成有用矿物难以单体解离并易于泥化，因而使矿石难选。
This above feature makes the valuable single mineral difficult to liberate and easy to be mud, so this ore is very hard to separate.
主要介绍了马兰矿选煤厂入选泥化煤时所做的理论研究、试验和取得的成绩。
The raw coal in Malan coal preparation plant is easily slimed . This paper presents the theoretical study, the experiment results and the practice achievements in preparing slime coal.
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