简介:1997年,我厂“碳铵改产尿素”工程顺程开工。在考察了多家先进尿素厂后,对比多种DCS控制系统,统定联合“北京思创系统工程有限公司”自主研究开发了BEST-CMS集散控制系统。该系统自1999年5月投运以来,运行稳定,操作方便,安全可靠,深受广大技术及操作人员的欢迎与好评。
简介:Chinahaslongbeenrecognisedasanimportantsourceofrefractoryrawmaterialsforrefractorymarketsworldwide.Bauxite,magnesia,fusedalumina,andrefractoryclaysinparticular,havemaintainedChina'sstrongpositionastheworld'sleadingsupplieroftheseminerals.However,importantchangeshavetakenplaceirthestructureofChineseandglobalsupplyoftheseminerals.Moreover,theworldrefractorymarketandthemineralstradingsectorhavealsoundergonearadicaltransformationthathasinfluencedmineralsupply,andshiftedendproductmanufacturetoChina.ThispaperhighlightsthesechangesandseeshowtheyhaveimpactedonChinaasaworldsourceofrefractoryminerals.