摘要
试验以攀枝花钛铁矿为原料,于微波高温箱式炉内,在1kW～3kW微波功率和不同加热时间内进行加热处理,然后水淬骤冷,利用SEM研究了微波加热对矿石内部产生裂纹的影响,并通过磨矿试验说明这些裂纹对矿石易磨性的影响。结果表明,该矿石在2分钟内可以被微波加热至400℃以上,能有效吸收微波能量。在1kW,2.45GHz微波下加热30s,然后进行水淬处理,通过SEM检测发现在矿石内部有用矿物和脉石晶粒边界上产生了裂隙。随后,不同粒度样品在微波处理后进行了磨矿试验,样品粒度为25mm的矿石在磨矿后其产品中-200目含量由原矿的66%提高至94%,证明微波加热产生的裂隙使得矿物更易于磨细。
The Panzhihua ilmenite was heated at varying microwave power（1kW～3kW）and heating time in the high temperature microwave reactor,and followed by water quenching.By using SEM analysis,the influence of the generation of fractures in the mineral was investigated.Also the influence of fractures upon the ore s grinding was analyzed by milling trial.It was shown that the mineral can absorb microwave power effectively and could be heated to 400℃ in two minutes by microwave heating.After microwave exposed for 30s under the conditions of microwave power lkW and frequency 2.45GHz and water quenching, the SEM analysis indicated that intergranular fractures occurred between ores and gangues. By the milling triaks al varying sample size, it was also shown that the percentage of -200 mesh was increased from 66% （raw ore） to nearly 94% （treated ore） when the size is 25mm. The conclusions proved that the minerals can be milled more easily after microwave heated.
出处
《轻金属》
CSCD
北大核心
2009年第11期50-53,共4页
Light Metals
基金
国家重点基础研究发展计划(973计划)项目资助(2007CB613606)
关键词
微波
钛铁矿
磨矿
攀枝花
microwave
ilmenite
milling
Panzhihua
