Physical preparation method of high density vanadium oxide powder

Abstract

The invention relates to a physical preparation method of high density vanadium oxide powder. Prepared high density (bulk density) vanadium oxide can be used to smelt vanadium-contained alloys and prepare metal vanadium as an additive or a main raw material. The physical preparation method is characterized in that: routine vanadium oxide powder is added to 0.1 wt% of a nonionic surfactant pulvis at a temperature of -20-120DEG C to improve the density and the stability of granulation and enhance the exhaust effect; mechanical pressurization, dry flaking, and granulation are directly carried out to prepare vanadium oxide particles with the granularity of 0.3-10mm; and in the process of flaking and granulation, the mechanical pressurization strength applied to the vanadium oxide powder is 10-125N/cm<2>, and the bulk density of granulated vanadium oxide is improved to 1.4-2.1g/cm<3> from routine 0.6-1.2g/cm<3>. High density vanadium oxide which has good airflow resistant effects and good furnace charge contact reacting performances allows the gasification and fly loss of vanadium oxide to be reduced, the smelting efficiency to be improved, and the density and the reaction efficiency of vanadium nitride products to be obviously improved in the production of vanadium nitride; and the density of the vanadium nitride products is far greater than the density of vanadium oxide products produced by chemical methods.

Description

Technical field: [0001] The invention relates to a physical preparation method of high-density powdery vanadium oxide. The prepared high-density (heap specific gravity) vanadium oxide is used as an additive or main raw material for smelting vanadium-containing alloys and preparing metal vanadium. The invention belongs to iron and steel metallurgy and nonferrous metallurgy. Metal smelting technology field. Background technique: [0002] Vanadium has many valuable physical and chemical properties, and is widely used in metallurgical industry, chemical industry, atomic energy and aerospace industry. The metallurgical industry is the main consumption sector of vanadium. The amount of vanadium consumed by iron and steel smelting accounts for 93% of the total amount of vanadium, of which the consumption of alloy steel accounts for 16%, tool steel accounts for 26%, carbon steel accounts for 6%, and high-strength low-alloy steel Accounted for 45%. At present, more than 65% of the ...

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Problems solved by technology

Therefore, the loss of vanadium oxide is still inevitable

[0008] In order to increase the density (heap specific gravity) of powdered vanadium oxide products and reduce the gasification and flying loss of vanadium oxide during smelting, the Panzhihua Iron and Steel Company Research Institute applied for the patent ZL 200410040012.3, which developed a vanadium precipitation process from large particle crystals in aqueous solution. For ammonium polyvanadate and ammonium metavanadate, use chemical means to increase the crystal grains, and after preparing vanadium oxide, its density (bulk specific gravity) can be changed from conventional 0.6 to 0.8 g / cm 3 Increase to 1.0~1.2 g / cm 3 However, the prepared vanadium oxide density (heap specific gravity) is not high enough to solve the problem fundamentally, and the loss phenomena such as flying and gasification during the smelting process are still relatively serious

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