摘要
为了从白云鄂博铁矿中回收萤石,提高萤石精矿的品位,采用光片法测定了白云鄂博铁矿石中萤石的赋存状态及萤石中的包裹体。结果表明,白云鄂博铁矿石中的萤石夹杂脉石多,嵌布粒度细,是一种极其难选的矿石。在铁矿物富集的区域,萤石中的包裹体密度可以高达2100粒/mm^(2)。由于受包裹体的影响,白云鄂博萤石精矿比相同选别条件下一般萤石矿选出的精矿品位低。在白云鄂博铁矿石中,-75μm的萤石微粒绝大部分都集中在5~30μm,30~75μm粒级很少,进一步细磨提高-30μm粒级的比例,不会显著地提高萤石的解离度。建议生产现场以“低质高产”组织生产为宜,在目前的磨矿粒度下,做好“选净”工作更为切实可行。
In order to recover fluorite from Bayan Obo iron ore and improve the grade of fluorite concentrate,the occurrence state and inclusions of fluorite in Bayan Obo iron ore were determined by light sheet method.The results show that the fluorite gangue in Bayan Obo iron ore is a kind of extremely difficult ore with fine disseminated particle size.In the area where iron minerals are enriched,the density of inclusions in fluorite can be as high as 2100 grains/mm^(2).Due to the influence of inclusions,the grade of fluorite concentrate in Bayan Obo is lower than that of ordinary fluorite ore under the same separation conditions.In Bayan Obo iron ore,most of the fluorite particles of-75μm are concentrated in 30~5μm,and the particle size of 75~30μm is very small.Further fine grinding to increase the proportion of-30μm particle size will not significantly increase the dissociation degree of fluorite.It is suggested that the production site should be organized by'low quality and high yield'.Under the current grinding particle size,it is more feasible to do a good job of'cleaning'.
作者
沈茂森
郝美珍
郭爱芳
于俊芳
孟文祥
SHEN Maosen;HAO Meizhen;GUO Aifang;YU Junfang;MENG Wenxiang(Mining Research Institute of Baotou Steel Group;Bayan Obo Iron Mine of Baotou Steel Group)
出处
《现代矿业》
CAS
2024年第4期155-158,共4页
Modern Mining
