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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 grinding of vanadium-titanium magnetite ore. -0.4mm ), a coarse, fine, and sweep magnetic separation process to magnetically select magnetite concentrate ( Fe 　 51 % to 52 %, TiO 2 　 12.6 % ~ 13.4 %, V 2 O 5 　 After 0.5 % to 0.6 %), the magnetic tail (mine) is carried out. Magnetic tailings (containing TiO 2 　 The process of the beneficiation method for the granular and partially crystalline ilmenite concentrates from 7 % to 9 %) is shown in the figure above. The design specifications of the titanium workshop in the concentrator are shown in the table below .

Titanium workshop design index of Panzhihua Mining Company's concentrator

Mineral processing products

Yield ( % )

Product    Bit ( % )

Recovery rate ( % )

TiO 2

Fe

Co

TiO 2

Co

Raw ore (magnetic tail)

100

7.5

　

　

100

100

Titanium concentrate

5.5

48

　

0.01

56

4.55

Sulphur- cobalt concentrate

0.7

0.21

　

0.306

0.02

17.71

Secondary iron concentrate

2

　

42

　

　

　

Tailings

91.8

2.83

　

0.0099

44

77.74

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: [next]

Ilmenite, rutile placer: This is the main type of ore China's current production of ilmenite and rutile concentrate. According to ZTE fine ceramic powder plant in Hainan and Hainan Metallurgical Industry Corporation old sand, Nankang, qinglan (shop front), black field (Baoding) production practice four state-owned titanium (sand) Mine, which ilmenite, The mining, ore dressing process of rutile, zircon and monazite sand mines and the technical indicators of various concentrates are shown below . The mining recovery rate is > 95 %, the depletion rate is < 5 %, and the total recovery rate of mineral processing is 80% to 85 %.
In order to improve the utilization of resources and economic benefits, reduce the ore, tailings backlog and environmental pollution, Guangzhou Nonferrous Metal Research Institute has studied the topic "Hainan Island seaside sand mine titanium ore selected elements of occurrence and comprehensive recovery approach "(third National mineral resources Comprehensive utilization Conference Proceedings, 1990). The research and experiments show that: 1 Titanium element mainly exists in the titanium - iron ore series formed by isomorphous substitution of Ti 4+ and Fe 2+ ; ilmenite (including TiO 2 ) 　 52 % to 54 %) and iron-rich ilmenite (containing TiO 2 　 46 %) accounted for 66.2 %, followed by titanium-rich ilmenite (including TiO 2 　 56 % to 58 %) accounting for 19.2 %, titanium hematite (containing 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 difficult to select mineral ilmenite, zircon, monazite, rutile, anatase and other mixed minerals, mineral particle size 0.2 ~ 0.08mm (Which is optional particle size); using diiodomethane media as "ups and downs" beneficiation, specific gravity <3.3 non-floating minerals useful in negative rate of 19.76%, a specific gravity> 3.3 heavy minerals useful for 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 Field strength 6000Oe sorted out 88.1 % of the ilmenite minerals ( TiO 2 43 %), and then 800 °C , Roasting 10min, and finally by the weak magnetic field 650 Oe, obtained TiO 2 50% ~ 51% of product in the magnetic ilmenite concentrate product; the other is useful in heavy minerals (ilmenite Coarse The ore, containing TiO 2 43% ~ 46 %) by electro-election ( 2.1kV , 120r / min ), can obtain 51% ~ 53 % ilmenite concentrate products of TiO 2 in the conductor product. 4 In the tailings with a field strength of 8000-12000 Oe magnetic separation, flotation can be used to obtain qualified monazite concentrate; and then 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. [next]

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