摘要
针对现有氧化锰矿还原处理工艺中效率低、能耗高、操作条件差、环境污染较严重等问题,利用气固流态化高效传质传热原理,将流态化快速还原技术应用于氧化锰矿的还原焙烧。广西大新锰矿矿石中的锰矿物主要以软锰矿(β-MnO2)和复水锰矿(MnO(OH)2)的形式存在,利用流态化状态下,气固传热效率高、接触面积大的特点,强化氧化锰矿石的还原焙烧反应,在750～850℃的温度条件下,CO含量3%～6%,获得了转化率大于90%的指标,焙烧时间只需10～60 s,证实了氧化锰矿(MnO2·nH2O)在数十秒钟实现流态化快速还原焙烧的科学设想,将对工业化开发利用低品位锰矿资源有一定的推动作用。
In view of the problems in the conventional processes for the reduction of manganese oxide ores such as low efficiency, high energy consumption, poor operation conditions and serious environment pollution, based on the high mass heat transfer principle of gas-solid fluidization, the fluidizing rapid reduction technology was adopted in the reduction roasting of manganese oxide ore. The manganese minerals in Guangxi Daxin manganese ore occurs mainly in pyrolusite （β- MnO2 ） and vernadite （MnO（OH） 2 ）. Fluidizing state characterized by high gas-solid heat transfer and large contact area was used to enhance the reduction roasting of manganese oxide ore. At a temperature of 750 - 850℃ and a CO content of 3% - 6%, a conversion rate of greater than 90% was achieved at a roasting period of only 10 - 60s, demonstrating the scientific assumption that a rapid fluidized reduction roasting of manganese oxide ore can be made in only several ten seconds. It will promote the industrialized exploitation and utilization of low grade manganese ore resource.
出处
《金属矿山》
CAS
北大核心
2009年第2期82-86,共5页
Metal Mine
基金
广西科学研究与技术开发计划项目(编号:桂科计字〔2007〕82)
关键词
流态化
软锰矿
还原焙烧
Fluidization, Pyrolusite, Reduction roasting
