国外某钛铁矿精选试验研究

发布时间：2018-06-04 23:26

  本文选题：钛铁矿 + 铬铁矿　； 参考：《昆明理工大学》2015年硕士论文

【摘要】：本论文以莫桑比克某钛粗精矿为研究对象,对该粗精矿进行了详细的工艺矿物学研究和生料直接入选选矿试验研究、熟料(焙烧后)钛铁矿选矿试验研究、熟料铬铁矿选矿试验研究、金红石与锆英石分离等试验研究,确定了适宜的工艺生产流程,为工业化处理钛粗精矿提供基础的技术支撑。该矿样主要经济矿物为钛铁矿、铬铁矿,主要脉石为石英、锆英石、微量的独居石等,矿样中颗粒磨圆度高。该钛粗精矿,含TiO242.56%,含Cr2032.41%,含铁36.90%。由原矿工艺矿物学研究可知,原矿主要金属矿物为钛铁矿和铬铁矿,本实验的重点是得到Ti02含量为46%-52%的钛精矿,Cr2O3含量为27%～60%的铬精矿。在对钛精矿和铬精矿的分离过程中,主要包括两方面：预选和钛铬富集。因为钛铁矿和铬铁矿比磁化系数较金红石和锆英石大,通过磁选后可以得到钛铁矿和铬铁矿的混合粗精矿；钛铁矿和铬铁矿比重和比磁化系数相近,直接采用重、磁选工艺很难使钛铁矿和铬铁矿进行分离；将钛铁矿和铬铁矿的混合粗精矿,采用回转窑、流化态床或沸腾炉在焙烧工艺参数为操作温度770℃、进料速率3.0kg/h、对应平均停留时间36min进行氧化焙烧,自然冷却可以很好的富集钛；对氧化焙烧富集后的矿物在磁场为0.3T的干式磁选机上进行选别,可以得到钛品位为47.94%,回收率78%.52,含Cr2030.23%的钛精矿。铬粗精矿的富集是通过还原焙烧进行的。还原焙烧-磁选最优参数为：焙烧时间90min,温度900℃,还原碳用量10%；通过还原焙烧后得到的矿物在磁场为0.3T的干式磁选下进行分离,可得品位为28.65%、作业回收率为90.13%的铬精矿。本实验的主要目的有： (1)得到品位为47.94%、回收率为78.52%,Cr203含量仅为0.23%的钛精矿；品位为28.65%、回收率为84.18%的铬精矿； (2)确定合理的实验方案和实验条件。
[Abstract]:In this paper, a coarse titanium concentrate in Mozambique was studied. The process mineralogy of the coarse concentrate was studied in detail, and the direct dressing test of raw material and clinker (calcined) ilmenite ore dressing were carried out. The experimental study on clinker chromite concentration and separation of rutile and zircon has determined the suitable technological process and provided the basic technical support for industrial treatment of titanium coarse concentrate. The main economic minerals are ilmenite, chromite, quartz, zircon, monazite, etc. The coarse titanium concentrate contains TIO 242.56, Cr 2032.41 and iron 36.90. From the mineralogical study of raw ore process, it can be seen that the main metallic minerals of the ore are ilmenite and chromite. The key point of this experiment is to obtain the chromium concentrate with Ti02 content of 46 ~ 52% and Cr _ 2O _ 3 content of 27 ~ 60%. In the separation process of titanium concentrate and chromium concentrate, there are two main aspects: preconcentration and titanium chromium enrichment. Because the specific magnetization coefficient of ilmenite and chromite is larger than that of rutile and zircon, the mixed coarse concentrate of ilmenite and chromite can be obtained by magnetic separation. It is difficult to separate ilmenite from chromite by magnetic separation process, the mixed coarse concentrate of ilmenite and chromite is used in rotary kiln, fluidized bed or fluidized bed, and the operating temperature is 770 鈩，

本文编号：1979316