新疆东天山成矿带是中国重要的Cu-Ni-Au-Fe等金属成矿带之一(Mao et al.,2005;秦克章等,2002),磁海是其中的一个大型Fe矿床,并伴有Co矿化。不同学者对磁海矿区的岩相学和矿床特征进行了总结(薛春纪等,2000),而相关矿床中Co-Ni矿物的赋...新疆东天山成矿带是中国重要的Cu-Ni-Au-Fe等金属成矿带之一(Mao et al.,2005;秦克章等,2002),磁海是其中的一个大型Fe矿床,并伴有Co矿化。不同学者对磁海矿区的岩相学和矿床特征进行了总结(薛春纪等,2000),而相关矿床中Co-Ni矿物的赋存状态亟待研究。本文侧重于磁海Fe-Co矿床中Co、Ni矿物的赋存状态、相关金属硫化物特征的研究,为磁海矿床和东天山地区的Co。展开更多
新疆东天山成矿带是我国重要的Fe、Cu、Ni等金属成矿带之一(Mao et al.,2005;王登红等,2006),磁海铁矿床即位于东天山成矿带之南段。目前它是国内唯一产于辉绿岩中的大型铁矿床,铁矿石储量已达到1亿吨(王登红等,2007),并伴生有Co的矿化...新疆东天山成矿带是我国重要的Fe、Cu、Ni等金属成矿带之一(Mao et al.,2005;王登红等,2006),磁海铁矿床即位于东天山成矿带之南段。目前它是国内唯一产于辉绿岩中的大型铁矿床,铁矿石储量已达到1亿吨(王登红等,2007),并伴生有Co的矿化。由于其矿床地质特征的特殊性。展开更多
Beach titanomagnetite(TTM)provides a cheap alternative source of Fe and Ti,but this ore is difficult to process to make suitable concentrates for the blast furnace.Recently studies showed that it is feasible to separa...Beach titanomagnetite(TTM)provides a cheap alternative source of Fe and Ti,but this ore is difficult to process to make suitable concentrates for the blast furnace.Recently studies showed that it is feasible to separate Fe and Ti by coal-based direct reduction.In this study,beach TTM was selected as the research object,the effects of reducing agents on reducing atmosphere in coal-based direct reduction of beach TTM were analyzed,and the role of volatiles was also studied.The results showed that when bitumite and coke were used as reducing agents of TTM,the CO produced from volatiles was involved in the reduction reaction,and the generated CO_(2) provided the raw material for the reaction of TTM.The reduction effect of bitumite was better than that of coke.The reason is that bitumite+TTM had a higher gas generation rate and produced a higher CO partial pressure,while coke+TTM had a lower gas generation rate and produced a lower CO partial pressure.When graphite was used as a reducing agent,there was a solid-solid reaction in the early stage in the reaction.With the continuous accumulation of CO_(2),the Boudouad reaction started and accelerated.Graphite+TTM also produced a higher CO partial pressure.展开更多
文摘新疆东天山成矿带是中国重要的Cu-Ni-Au-Fe等金属成矿带之一(Mao et al.,2005;秦克章等,2002),磁海是其中的一个大型Fe矿床,并伴有Co矿化。不同学者对磁海矿区的岩相学和矿床特征进行了总结(薛春纪等,2000),而相关矿床中Co-Ni矿物的赋存状态亟待研究。本文侧重于磁海Fe-Co矿床中Co、Ni矿物的赋存状态、相关金属硫化物特征的研究,为磁海矿床和东天山地区的Co。
基金Project(52104257)supported by the National Natural Science Foundation of China。
文摘Beach titanomagnetite(TTM)provides a cheap alternative source of Fe and Ti,but this ore is difficult to process to make suitable concentrates for the blast furnace.Recently studies showed that it is feasible to separate Fe and Ti by coal-based direct reduction.In this study,beach TTM was selected as the research object,the effects of reducing agents on reducing atmosphere in coal-based direct reduction of beach TTM were analyzed,and the role of volatiles was also studied.The results showed that when bitumite and coke were used as reducing agents of TTM,the CO produced from volatiles was involved in the reduction reaction,and the generated CO_(2) provided the raw material for the reaction of TTM.The reduction effect of bitumite was better than that of coke.The reason is that bitumite+TTM had a higher gas generation rate and produced a higher CO partial pressure,while coke+TTM had a lower gas generation rate and produced a lower CO partial pressure.When graphite was used as a reducing agent,there was a solid-solid reaction in the early stage in the reaction.With the continuous accumulation of CO_(2),the Boudouad reaction started and accelerated.Graphite+TTM also produced a higher CO partial pressure.
