Method for selecting and smelting titanium from vanadium titanomagnetite at low temperature

Abstract

The invention relates to a method for selecting and smelting titanium from vanadium titanomagnetite at low temperature, belonging to the technical field of metallurgy. The method comprises the following steps: 1) roasting at the low temperature of 500-1100 DEG C; 2) adding a solid reductant to the roasted product, carrying out reduction smelting at 1100-1300 DEG C, and separating slag and iron torespectively obtain molten iron and titanium slag; carrying out magnetic separation on the titanium slag to remove impurities, thereby obtaining the titanium-rich material; and 4) adding required metal oxide concentrate into a direct-current arc furnace, and directly alloying the molten iron to obtain alloy steel. The smelting method provided by the invention is a brand new smelting method, and changes the existing iron ore selection into titanium ore selection; the pellet is molten and reduced by roasting at low temperature, and the separated molten iron facilitates the addition of ores withdeficient metal elements so as to directly smelt the alloy steel; the titanium slag is subjected to magnetic separation to obtain the titanium-rich material, and the titanium-rich material is furthersmelted to obtain the titanium alloy or titanium metal; and the smelting slag can be used as the raw material for smelting rare earth metals so as to sufficiently and respectively utilize the elements in the ores in one step.

Description

technical field [0001] The invention relates to a method for low-temperature mining, dressing and titanium-smelting of ilmenite, especially vanadium-titanium-magnetite, which can make full use of elements in the vanadium-titanium-magnetite, and belongs to the technical field of metallurgy. Background technique [0002] The prospective reserves of vanadium-titanium magnetite in the Panxi area are 36.485 billion tons, accounting for more than 30% of the national iron ore reserves, and the titanium resource reserves are 870 million tons, accounting for 90.5% of the national titanium resource reserves and 35.2% of the world's titanium reserves. The high-titanium ore in Panxi area is associated with a variety of rare and precious metals, which is different from ordinary iron ore. There are 26 kinds of valuable elements in the mine, such as titanium (TiO 2 ), iron (TFe), vanadium (V 2 o 5 ), chromium (Cr 2 o 3 ), manganese (Mn), copper (Cu), nickel (Ni), cobalt (Co), scandium...

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Problems solved by technology

[0006] Vanadium-titanium magnetite is different from ordinary iron ore. Iron exists in minerals not as a single iron oxide, but as a variety of minerals in which iron is combined with many elements, such as titanomagnetite, ilmenite, Titanium-iron spar, etc., are also replaced by other elements, and they are closely symbiotic. Taking Panzhihua vanadium-titanium magnetite as an example, about one-third of the iron is combined with titanium, and iron ore is still used for beneficiation. method, the difficulty of direct reduction is much greater than that of ordinary iron ore, the reduction temperature is high, and the time is long

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