拜耳法生产工艺中综合除碳技术的研究及应用  

Research and Application of Comprehensive Carbon Removal Technology in Bayer Process

作　　者：马向阳 李宁册 蒋锐 裴雪峰 MA Xiangyang;LI Ningce;JIANG Rui;PEI Xuefeng

机构地区：[1]洛阳香江万基铝业有限公司,河南洛阳471800

出　　处：《有色设备》2023年第5期49-54,94,共7页Nonferrous Metallurgical Equipment

摘　　要：目前铝土矿资源匮乏,各氧化铝厂使用铝土矿种类复杂、品位低下、矿石中碳含量偏高等,导致单位能耗增加、产能降低,同时氧化铝生产中系统碳酸钠累积,也对溶出、沉降、蒸发等多个工序造成不利影响,排碳除杂工作迫在眉睫。目前该氧化铝厂主要采取蒸发强制效提浓、排盐苛化工艺去除系统碳酸钠,但该工艺流程复杂、能耗高、排碳成本高且排碳能力有限,通过技改沉降二次洗液添加石灰乳进行苛化同时串联立式叶滤机综合除碳工艺,提升系统综合除碳能力,拓宽铝土矿使用种类,进一步降低生产成本及能耗。At present,bauxite resources are scarce,and the use of bauxite in alumina plants is complex,low grade and high carbon content in ore,resulting in increased unit energy consumption and reduced production capacity.Meanwhile,the accumulation of sodium carbonate in alumina production has adverse effects on multiple processes such as dissolution,settlement,decomposition and evaporation,so the work of carbon emission and impurity removal is imminent.At present,the aluminum oxide plant mainly adopts evaporation forced effect salt-discharge causticization process to remove sodium carbonate system,but the process is complicated,the carbon emission cost is high and the carbon emission capacity is limited.Through technical transformation of the side flow causticization series vertical leaf filter carbon removal process,the comprehensive carbon removal capacity of the system is improved,the types of bauxite are expanded,and the production cost is further reduced.

关 键 词：铝土矿 碳酸钠 排盐苛化 侧流苛化 立式叶滤机 

分 类 号：TF821[冶金工程—有色金属冶金] TQ133.1[化学工程—无机化工]