Vanadium-titanium sinter and preparation method thereof
A technology of vanadium-titanium sinter and vanadium-titanium iron concentrate, which is applied in the field of vanadium-titanium sintering, can solve the problems of high cost, poor spheroidization and water absorption, and restrict the smelting strength of blast furnace, so as to reduce the cost of raw materials and achieve high mechanical strength. Effect
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[0011] The present invention provides a method for preparing vanadium-titanium sintered ore. The method includes: mixing a sintering raw material composition with water to prepare a sintering mixture, and then distributing, pressing and sintering the sintering mixture; wherein, The sintering raw material composition contains sea sand vanadium ilmenite concentrate, low-grade ordinary iron concentrate, flux, fuel and optional steel slag; the content of TFe in the sea sand vanadium ilmenite concentrate is above 58% by weight, TiO 2 The content is 12-14% by weight, SiO 2 The content of TFe is below 1.0% by weight; the content of TFe in the low-grade ordinary iron ore is 47-49% by weight, TiO 2 The content is below 1.0% by weight, SiO 2 The content of is 12-17% by weight; based on the total weight of the sintering raw material composition, the content of the sea sand vanadium ilmenite concentrate is 65-70% by weight, preferably 65-68% by weight; The content of low-grade ordinary iron...
Example Embodiment
[0024] According to a preferred embodiment of the present invention, the preparation of the sintering mixture is carried out in the presence of returned ore, that is, the returned ore and the sintering raw material composition are mixed together to prepare the sintering mixture, in this case , The particle size of the returned ore can usually be below 6.3mm. The addition of the returned ore can further improve the gas permeability of the sintered mixture, increase the amount of sintered liquid phase, and improve the strength of the sintered ore.
[0025] In the present invention, relative to 100 parts by weight of the sintering raw material composition, the amount of the returned ore may be 20-30 parts by weight.
[0026] According to the preparation method of the present invention, the process of preparing the sintering mixture may include: first mixing and mixing and second mixing and granulating. Generally, a method of mixing and mixing includes mixing the sintering raw materia...
Example Embodiment
[0047] Example 1-5
[0048] Examples 1-5 are used to illustrate the vanadium-titanium sinter of the present invention and the preparation method thereof.
[0049] Mix the sea sand vanadium ilmenite concentrate, low-grade ordinary iron concentrate, quicklime, limestone, steel slag, coke powder, and return ore in the proportions shown in Table 1, then add them to the mixing bin and mix in the mixer for 6-8 minutes (Including one mixing and mixing and two mixing balls), the sintered mixture is obtained, and the sintered mixture with a particle size greater than 3 mm accounts for more than 65 wt%.
[0050] First, spread the primer in the sintering cup (300mm in diameter and 800mm in height), and then put the above-mentioned sintering mixture into the sintering cup for cloth and pressing, pressing the material to make the material layer down 30mm. Then, the sintering cup is ignited and exhausted and sintered. The ignition temperature is controlled to 1100℃-1150℃, the ignition time is 2.0...
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