Progress in titanium beneficiation technology

Zhou Jianguo and other long-term research on the recovery and comprehensive utilization of Panzhihua micro-fine ilmenite. Based on the results obtained from the experimental research, it is proposed to use the re-election-strong magnetic separation process for coarse-grained grades, using ilmenite and gangue minerals in gravity, The difference in magnetic properties strengthens the original process, and the recovery rate of Ti2O is increased by more than 10%, and the concentrate grade is about 30%. The fine-grained grade adopts a strong magnetic-flotation process to obtain a concentrate with a concentrate yield of 29.21%, a concentrate grade of 47.31%, and a recovery rate of 59.74%. In order to recover the fine-grained ilmenite (-0.045mm) of Panzhihua Iron and Steel Co., Ltd., a high-gradient magnetic separator was used to carry out the magnetic-floating process test for recovering fine-grained ilmenite. The results show that when the ore is containing TiO2, it is 11.033%. At the time, the grade was 44.46%, and the recovery rate was a good indicator of 45.76%. Guangzhou Research Institute of non-ferrous metal belt dryer surface magnetic field of up to 1T, a plant Panzhihua Ilmenite ore tailing job, job recovery rate of 80%, the tailing rate of 35%. Yu Wenjie et al. used a magnetic separation column to sort the titanium-containing magnetite from the Panzhihua Mine. The results show that the ore grade, yield and recovery rate of the ferrotitanium after pre-magnetization by magnetic separation column are significantly higher than that of non-pre-magnetic. The Panzhihua Iron and Steel Plant has achieved good results by replacing the original FLX-600mm cast iron spiral concentrator with the GL-2C spiral concentrator developed by Guangzhou Nonferrous Metal Research Institute. In the case of similar concentrate grades, fine grain titanium Iron ore recovery rate increased by 15%. Shakers are widely used in ilmenite ore dressing, especially in small mines where a shaker is used to obtain a qualified concentrate. Li Zhizhang and others used a shaker process for mineral samples in Kunming. After iron removal, the grade of ilmenite concentrate reached 48.82%, and the recovery rate was over 76%. Electro-selection has been widely used as the final checker for the production of titanium concentrate. The Panzhihua Iron and Steel Plant has selected YD-3 high-pressure electric separator developed by Changsha Institute to re-select coarse concentrate. When the ore contains TiO2 At 28.86%, the final classification index was 47.74%, the tailings grade was 10.63%, and the operation recovery rate was 84.18%.

There are many researches on ilmenite flotation agents. The commonly used collectors for ilmenite are fatty acids, and oleic acid and its salts are widely used abroad. In recent years, it has been studied to use hydroxamic acid, styrenephosphonic acid and salicyl hydroxamic acid as ilmenite flotation collectors. The combination of two or more agents, with the synergistic effect of the agent, is often better than any of the agents. In recent years, flotation of ilmenite by mixed agents has become the main direction of research. Yuan Guohong and others conducted an experimental study on the -0.045mm fine-grain grade in the titanium-selected raw materials of Panzhihua Titanium Corporation, and developed an R-2 collector suitable for such complex ore. Industrial test results show that at the 21% of the ore grade, the final titanium concentrate grade is over 47.5%, and the flotation recovery rate is nearly 70%. He Hu et al. carried out a flotation test on the coarse-grained ilmenite of Panzhihua Iron and Steel Co., Ltd., using ZY collector to test the materials with a content of -0.074mm of 22.19% and 6.18%. The results show that the ZY collector has It has strong collection performance and strong selectivity, and can recover +0.154mm granular ilmenite which is generally considered to be unrecoverable by flotation. The industrial application effect is good. Xie Jianguo and others used the new ilmenite flotation collector RST to treat Pangang's fine-grained ilmenite. The test results show that for the ore mine with TiO2 mass fraction of 19.75%, after desulfurization, RST is used as collector, oxalic acid is used as inhibitor, sulfuric acid is used as pH adjuster, and one rough selection is selected four times for closed circuit process. Titanium concentrate grade Up to 48.28%, the recovery rate of TiO2 is 79.9%. At the same time, it also proposes to use the new collector ROB for Panzhihua fine-grained ilmenite flotation. The industrial test has obtained a good index of 48% concentrate grade and 75% recovery rate. Xie Zejun proposed the use of a new XT flotation collector. The test results show that the XT new collector has strong collection performance and good selectivity. In the ore grade TiO2 is 17.80%, the concentrate grade TiO2 is 47.42%, and the operation recovery rate is 73.28%. Zhu Jianguang reported that the ratio of styrene phosphonic acid to pine oil was 4:1, which was used for flotation of Panzhihua fine ilmenite. The effect was good, and the concentrate grade was 47.22%, and the recovery rate was 74.58%. Fu Wen et al. used F968 combination agent flotation Panzhihua ilmenite to achieve full-scale inclusion (-0.15mm). F968 treatment of magnetic separation tailings, after a rough one sweep four selection, the test indicators are: ore TiO2 grade 11.03%, concentrate TiO2 grade 48.45%, flotation recovery rate of 80%.

Yu Dewen et al. conducted a study on the suppression of flotation of primary fine-grained ilmenite, which made the collector consume a lot, and the problem of reducing the cost of ore dressing was studied in depth. Studies have shown that H2SO4 and Pb2+ ions have a good activation effect on ilmenite. H2SO4 is used as the pH adjuster, Pb2+ ion is the ilmenite activator, and fatty acid soap is used as the collector. The good separation of ilmenite and gangue minerals is achieved without adding any inhibitor. The results of fine particle flotation in Panzhihua Titanium Plant are: 21.96% of the ore grade, 47.82% of the concentrate grade, and the recovery rate is 63.25%.

Yu Xinyang and others have complicated the rutile intercalation relationship in a tailings of a selected plant. It is difficult to effectively recover the titanium resources by conventional mineral processing, and explore the use of high-efficiency collector ZP-01 and grading flotation concentrate re-magnetic separation-re-election. New Technology. The experimental research shows that: using the high-efficiency collector ZP-01 and the new process of re-magnetic separation-re-election of the grading flotation concentrate, the good grade of rutile concentrate grade 81.06% can be obtained, and the titanium resources in the tailings can be comprehensively recovered. The problem is better solved.

Zhu Junshi et al studied the surface bonding mechanism of styrene phosphonic acid and ilmenite. It is believed that the action of collector and ilmenite firstly has uncompensated bonds through the oxygen in the phosphonic acid group and the surface of ilmenite. Or the lattice cation of the weakly compensated bond generates a four-membered ring chelate or a poorly soluble compound. Fan Xianfeng et al. used microwave energy to pretreat ilmenite. The mechanism study showed that microwave energy accelerated the oxidation of ferrous ions on the surface of ilmenite to ferric ions, and enhanced the adsorption of oleate ions on the surface. The flotation recovery rate of ilmenite. Xu Xiangyang used ROB collector to float Panzhihua ilmenite. The mechanism of action indicated that ROB can be applied to the surface of ilmenite by electro-adsorption and chemisorption, especially in acidic medium. Electro-adsorption is obvious; The change of surface electrical properties before and after minerals indicates that the adsorption of ROB is an important factor affecting the floatability of minerals. The electron binding energy of ROB on the surface of ilmenite with Fe, Ti and O changes significantly. ROB may be chemically bonded to the iron and titanium sites on the surface of the mineral with O as the bonding atom.

S. Blatovich et al. studied the floatability of composite perovskites, ilmenite and rutile, pH during flotation, pre-flotation slurry pretreatment and harvesting. The type of agent has a great influence on their flotation. The role of modified ester collectors was also investigated. Stated: fatty alcohol sulfates may be modified phosphate flotation perovskite well; petroleum sulfonates modified phosphate ester can be well flotation ilmenite; mixtures of phosphates and succinamates Flotation rutile is the most effective. It has been pointed out that the use of an electric mineral processing machine (EMP) simulation layer can improve the extraction of rutile and zircon from heavy mineral deposits. The EMP process was developed in the current practice of using electrostatic technology to separate rutile and zircon. Testing with the EMP process has proven to be more efficient and reduces the sorting step.

Gao Yude et al. conducted a comprehensive utilization study on the iron ore tailings in Montenegro and achieved good results. The ore tailings in Montenegro are complex in nature, with high chlorite content and difficult to sort. Using strong magnetic separation-coarse concentrate re-grinding-flotation process and titanium flotation series of chemicals independently developed by Guangzhou Nonferrous Metal Research Institute, the titanium concentrate grade TiO2 is finally obtained 46.5%, and the relative strong magnetic rough selection ore recovery rate is greater than 50. % industrial test results. Chen Shumin proposed a method for recovering ilmenite by studying the properties of Panzhihua microfine fraction (-19μm). The experimental results show that the Panzhihua fine-grained ilmenite can be recovered by the strong magnetic-flotation process. Tang Mingquan discussed the comprehensive utilization of secondary resources generated by Panzhihua Iron and Steel in mining, mineral processing and ironmaking. It is proposed to use the coarse grain tailing method to reduce the grinding cost for the iron ore produced in the mining with less than 26% iron content. The magnetic recovery process recovers iron from the steelmaking slag and recovers fine grain titanium from the magnetic tail. Vanadium is recovered from molten iron.

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