The red mud,which is derived from the low-temperature digestion of gibbsite-type bauxite,prima-rily exists as limonite or alumogoethite.These minerals have poor magnetic properties,resulting in an ineffective magnetic separation process.The magnetizing roasting-wet magnetic separation process is used to treat this type of red mud,yielding excellent magnetic separation performance.The resulting iron concentrate boasts a grade of 56%and a yield exceeding 31%.For a coastal alumina project,the magnetizing roasting-wet magnetic separa-tion process is planned to be used.The project will cover a total area of 61,975 square meters and will require a total investment of RMB 433.63 million.Following engineering application,there will be an annual reduction of 917,000 tons of dry red mud.Additionally,the red mud storage capacity will be decreased by 613,000 cubic meters,and the annual profit is expected to reach RMB 9.2 million.
关键词
三水铝石型铝土矿溶出赤泥/磁化焙烧-湿法磁选/工程应用
Key words
Red mud derived from the low-temperature digestion of gibbsite-type bauxite/Magnetizing roast-ing-wet magnetic separation process/Engineering application
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