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Vanadium-titanium magnetite beneficiation method
Vanadium-titanium magnetic iron ore: This is the main type of ore rock ilmenite deposits in China. According to the beneficiation research and production practice of Panzhihua Mining Company, the ore dressing of ilmenite concentrate is in the magnetic separation process of the vanadium-titanium magnetite ore after a period of grinding (-0.4mm), a coarse, a fine, and a sweep. The magnetic tail (mine) after the magnetite concentrate (Fe 51% to 52%, TiO 2 12.6% to 13.4%, V 2 O 5 0.5% to 0.6%) is carried out. Beneficiation method of granular and partially flaky ilmenite concentrate in magnetic tailings (containing 7% to 9% of TiO 2 ).
   Vanadium-titanium magnetite ore is densely symbiotic in the form of Fe and Ti. It is present in TiO 2 in titanomagnetite (about 53% of the total reserves of TiO 2 in Panxi area), due to the state of occurrence, particle size, and most of the smelting in the blast furnace. without the reduction chemical reaction characteristics of TiO 2 slag into the form factor, yet difficult to recycle mechanical processing methods. However, with the improvement and improvement of the smelting process and technology by the Panzhihua Iron and Steel Research Institute and the Beijing Iron and Steel Research Institute on the comprehensive recovery of iron, titanium and vanadium from titanium magnetite, the process has been basically completed and positive results have been achieved. . In addition, tests have been carried out to reduce the amount of iron powder and to recover vanadium and titanium. The process is:
Vanadium-titanium-iron concentrate-iron powder, kiln kiln carbon reduction-V 2 O 5 , crushing grinding-vanadium-rich titanium material-wet separation- heavy magnetic separation separation-TiO 2
   Ilmenite, rutile placer: This is the main type of ore China's current production of ilmenite and rutile concentrate. According to the production practice of four state-owned titanium (sand) mines of Hainan Zhongxing Fine Ceramics Micro Powder Factory and Hainan Metallurgical Industry Corporation, namely Shasha, Nangang, Qingyi (pre-shop) and Wuchang (Baoding), its ilmenite, Mining, ore dressing process of rutile, zircon and monazite sand mines and technical indicators of various concentrates. The mining recovery rate is >95%, the depletion rate is <5%, and the total recovery rate of mineral processing is 80%-85%.
In order to improve the utilization rate and economic benefits of resources, reduce the backlog of mines and tailings, and pollution to the environment, the Guangzhou Institute of Nonferrous Metals has studied the occurrence of titanium and the comprehensive recovery methods of the difficult minerals in Hainan Island. (Proceedings of the Third National Conference on Comprehensive Utilization of Mineral Resources, 1990). The research and experiments show that: 1 Titanium element mainly exists in the titanium-iron ore series formed by the isomorphous substitution of Ti 4+ and Fe 2+ ; ilmenite (including 52% to 54% of TiO 2 ) And the proportion of iron-rich ilmenite (46% containing TiO 2 ) is 66.2%, followed by titanium-rich ilmenite (containing 56% to 58% of TiO 2 ) accounting for 19.2%, titanium hematite (including TiO 2 10.7% to 19.5%) accounted for 14.6%. In addition, titanium is also present in small amounts in rutile, anatase, whitite and vermiculite. ② hard metal selected mineral ilmenite, zircon, monazite, rutile, anatase or the like mixed minerals, mineral grain size 0.2 ~ 0.08mm (genus optional particle size); using diiodomethane media as "ups and downs" beneficiation, gravity <3.3 of the non-useable minerals have an uplift rate of 19.76%, and the useful heavy minerals with a specific gravity of >3.3 have a sinking yield of 73.5%. 3 In the heavy minerals that sink, in addition to the main ilmenite, it can comprehensively recover zircon, monazite, titanium-rich ilmenite and rutile; its effective beneficiation process is two: one is the use of useful heavy minerals by electromagnetic selection The field strength 6000Oe sorted out the magnetic product (TiO 2 43%) which accounts for 88.1% of the ilmenite mineral content, and then oxidized and roasted at 800 ° C for 10 min, and finally the field strength 650 Oe weak magnetic separation, in the magnetic separation product Obtaining ilmenite concentrate products with TiO 2 50%~51%; secondly, useful heavy minerals (ilmenite concentrate, containing TiO 2 43%~46%) by electric selection (2.1kV, 120r/min) In the conductor product, ilmenite concentrate products with 51% to 53% TiO 2 can be obtained. 4 In the tailings with a field strength of 8000-12000 Oe magnetic separation, flotation can be used to obtain a qualified monazite concentrate; in the non-electromagnetic heavy mineral tailings with a field strength > 20000 Oe magnetic separation With electrification, qualified zircon concentrates can be obtained in non-conducting products, and qualified rutile concentrates can be obtained in conductive products.
More than 90% of titanium ore resources at home and abroad are used to produce titanium white and titanium white production processes, mainly advanced chlorination, hydrochloric acid and traditional sulfuric acid.