vanadium-titanium magnetite beneficiation method
Vanadium and titanium magnetite: This is a major ore deposits of ilmenite rock types. According to the Panzhihua mining beneficiation research and production practice, the beneficiation of the ilmenite concentrate vanadium and titanium magnetite ore over a period of grinding (-0.4mm), a coarse and a fine, sweeping away the magnetic separation process magnetic after a magnetite concentrate (Fe51% ~ 52%, TiO212.6% to 13.4%, V2O50.5% ~ 0.6%) of the magnetic tail (mine). In granular magnetic tailings (including TiO27% ~~ 9%) and part of the piece of crystalline ilmenite concentrate beneficiation process.
Vanadium-titanium magnetite ore of Fe and Ti in the form of dense symbiotic Fu existence of TiO2 titanium magnetite (accounting for Panxi area TiO2 total reserves, 53%), due to the mode of occurrence, particle size, as well as in most of the blast furnace is not be restored to the form of TiO2 into the chemical reaction characteristics of the slag and other factors, it is hard mechanical beneficiation recycling.
However, with the Panzhihua Iron and Steel Institute and the Beijing Iron and Steel Research Institute of iron, titanium, vanadium titanium magnetite recovery of the smelting process and technology improvement and enhancement, is now basically open up the process, and achieved positive results . In addition, also carried out to restore the grinding and separation system to take the test of the iron and comprehensive recovery of vanadium and titanium.
Vanadium-titanium magnetite beneficiation process:
Vanadium and ilmenite concentrates – iron
In tunnel kilns carbon reduction – of V2O5
Broken grinding – rich vanadium-titanium material – wet separation – heavy magnetic separation – TiO2
Ilmenite, rutile, placer: This is the main ore types for production of ilmenite and rutile concentrates. Of Hainan the ZTE fine ceramic powder Plant and Hainan Metallurgical Industry Corporation Sand old Nankang, qinglan, (shop front), black field (Baoding), four state-owned titanium ore (sand) production practice, the ilmenite rutile, zircon, monazite sands mining, beneficiation process and concentrate technical indicators as shown in Figure 3.5.10. Mining recovery rate of> 95% dilution rate
In order to improve resource utilization and economic benefits, reduce the mine, the backlog of tailings and pollution of the environment, Guangzhou Nonferrous Metal Research Institute has case studies, “Hainan Island beach sand mine to mine titanium element is selected Occurrence and recycling approach. ”
The study results show that:
Titanium element endowed with Ti4 + and Fe2 + were in the class of isomorphic substitution and formation of titanium – iron ore series; which ilmenite (including TiO252% ~ 54%) and iron-rich ilmenite (containing TiO246%) share of the proportion of 66.2%, followed by Ti-rich ilmenite (including TiO256% ~ 58%) accounted for 19.2%, the titanium hematite (including TiO210.7% ~~ 19.5%) accounted for 14.6%. In addition, the titanium in a small amount of Fu exist rutile, anatase, leucoxene and sphene.
Difficult to select the ore is ilmenite, zircon, monazite, rutile, anatase and other mixed minerals, mineral particle size 0.2 to 0.08mm (an optional particle size); using diiodomethane media for “ups and downs” dressing The proportion of3.3, valuable heavy minerals sink to the production rate of 73.5%.
In the sinking of the heavy minerals, in addition to the main income ilmenite comprehensive recovery of zircon, monazite, Ti-rich ilmenite and rutile;
Effective beneficiation process:
First, the valuable heavy minerals selected by the electromagnetic field strength 6000Oe sub-elected magnetic products accounted for 88.1% of the proportion of ilmenite mineral (TiO243%), 800 ° C, 10min oxidation roasting, and finally the 650 Oe field strength of weak magnetic in magnetic products the available TiO250% to 51% of the ilmenite concentrate product;
Second, the valuable heavy minerals (crude ilmenite concentrate containing TiO243% ~ 46%) of the electrostatic separation (2.1kV, 120r/min), available in the conductor products of TiO2 51% to 53% of the ilmenite concentrate products.
Flotation tailings magnetic field strength 8000-12000 Oe., Availability of qualified monazite concentrate; then its by the field strength> 20 000 Oe and magnetic separation of non-magnetic heavy mineral tailings electrostatic separation, in the non-conductor products, zircon concentrate, qualified, qualified rutile concentrate conductor products.
More than 90% of titanium resources at home and abroad for the production of titanium dioxide, titanium dioxide production process, advanced chlorination by hydrochloric acid and sulfuric acid.
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