In positive muds, i.e. in sodium bentonite-MMH-AlAl_3 systems, even weakly negatively charged additives such as CMS can not functionize as filtration loss controller.Commonl...

• 在正电泥浆体系中,阴离子型处理剂失去其原有功能,应选用非离子型处理剂、开发阳离子型处理剂。