攀西钛精矿流态化氧化-磁选提质研究
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TD95

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国家自然科学基金项目(51774262,51504231,51504232,21736010)。


Upgrading Panzhihua-Xichang ilmenite using a fluidizing oxidation-magnetic separation process
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    摘要:

    随着氯化法钛白产业不断发展,利用我国攀西钛精矿生产氯化法用富钛料是重要的发展趋势。针对攀西钛精矿因杂质含量高无法满足电炉还原钛渣升级原料要求的问题,笔者开展了流态化氧化焙烧磁选提质实验研究,分析氧化过程的物相结构转变,考察焙烧参数、磁选条件等对提质效果的影响。结果表明,基于钛铁矿弱氧化可形成磁性的钛铁矿赤铁矿固溶体原理,在650~750℃温度范围内攀西钛精矿流态化氧化焙烧可获得较高磁性,在3 500 Gs下直接磁选精矿产率达70%以上;经进一步球磨磁选后,可获得满足生产升级钛渣(UGS)用原料指标的提质矿,钛回收率49.29%,且通过优化磁选可进一步提高提质效果。通过流态化氧化磁选实现攀西钛精矿提质利用具有较好的可行性。

    Abstract:

    With the continuous development of titanium dioxide production using chlorination method in China, the production of Ti-rich materials for chlorination process from Panzhihua-Xichang ilmenite concentrate becomes an inevitable trend. In order to use Panzhihua-Xichang ilmenite that contains a high volume of impurities and is unfit for the electric furnace reduction-upgraded titanium slag process, which is a feasible technical route, the fluidization oxidation roasting-magnetic separation process for upgrading Panzhihua-Xichang ilmenite was studied in this work. The transformation of phase structure during oxidation process, the effects of roasting parameters, and magnetic separation conditions were investigated. Based on the principle that weak oxidation of ilmenite can form a magnetic ilmenite-hematite solid solution, the results of experiments showed that high magnetic ore can be obtained by fluidization oxidation in the temperature range of 650℃ to 750℃, and the concentrate yield of direct magnetic separation is over 70% with magnetic field intensity of 3 500 Gs. Furthermore, the upgraded ore that meet the material requirements for producing upgraded titanium slag(UGS)were obtained by ball-milling and magnetic separation, with a titanium recovery rate of 49.29%. The process could be further improved by optimizing magnetic separation. It is proved that fluidization oxidation-magnetic separation is feasible for upgrading and utilization of Panzhihua-Xichang ilmenite.

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李哲,范川林,潘锋,杨海涛,朱庆山.攀西钛精矿流态化氧化-磁选提质研究[J].重庆大学学报,2019,42(4):63-71.

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  • 收稿日期:2019-01-14
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  • 在线发布日期: 2019-04-23
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