Ferro Vanadium is composed of vanadium and iron alloys, mainly used as alloying agent in steel, high vanadium vanadium is also used as an additive non-ferrous alloys. Commonly used vanadium vanadium containing 40%, 60% and 80% three.
Ferro Vanadium uses:
Ferro Vanadium is mainly used as an alloy of steel additives. After adding Ferro Vanadium steel, can significantly increase the hardness, strength, abrasion resistance, ductility, improve machinability of steel. Ferro Vanadium commonly used in carbon steel, low alloy strength steel, high alloy steel, tool steel and cast iron production.
Ferro Vanadium to block or powder suppliers. Ferro Vanadium shall not exceed the maximum block 8kg, less than 20 × 20mm fragments shall not exceed 5% of the total weight. Ferro Vanadium powder supply in-0.45mm mesh, wherein-0.098mm of not more than 30% of the total weight. Ferro Vanadium block surface and cross section and does not contain vanadium powder within clearly visible inclusions. Domestic FeV50 using barrel weight 100kg metal pail;, export FeV75 mostly used barrel, net weight 250kg metal pail, for there are special requirements on the packaging side, by the supply and demand sides negotiated settlement.
Smelting method:
Silicon thermal power vanadium pentoxide flake with 75% ferrosilicon and a small amount of aluminum as a reducing agent in alkaline arc furnace, by reduction, refining, refining the two phases was qualified products. Restore all of the reducing agent a furnace 60 to 70% of the total of vanadium pentoxide flake into furnace, blast furnace slag in the high calcium oxide, the thermal reduction to silica. When the slag is less than 0.35% V2O5, the release of slag (called depleted slag, construction materials can be discarded or used), into the refining stage. At this point, vanadium pentoxide flake and then add lime to remove excess liquid alloy of silicon, aluminum, etc., ferroalloy ingredients meet the requirements, you can slag the iron alloy. Late release of slag refining called rich slag (containing up to 8 to 12% V2O5), the next batch starts feeding the return to use. Generally cylindrical ingot cast alloy liquid, cooling, stripping, crushing and cleaning residue after products. This method is generally used for 40 to 60 percent of vanadium vanadium iron smelting. Vanadium recovery of up to 98%. Processing power 1600 kilowatts per tonne of ferro-vanadium · o'clock.
Aluminum thermal aluminum as a reducing agent in alkaline lining of the furnace tube, using the lower ignition smelting. Mixing first fraction of the charge into the reactor, the line ignition. Beginning of the reaction and then gradually adding the remaining charge. Typically used for smelting high-vanadium iron (60 to 80% vanadium), the recovery is slightly lower than the silicon thermal power of about 90 to 95%
Features:
Common Ferro Vanadium Vanadium containing 40%, 60% and 80% three. Chinese ferro-vanadium production is the main raw material is vanadium-titanium magnetite ore enrichment through, through the blast furnace pig iron containing vanadium refining, the atomization furnace or converter blowing process to extract vanadium slag. After vanadium slag with addition of crushed salt (soda ash, salt or Glauber's salt water) for sodium oxide roasting, the vanadium become soluble sodium metavanadate (NaVO3), leaching purified ammonium sulfate precipitate out more vanadate Ammonium [(NH4) 2V6O16], and then by deaminase melted and cast into vanadium pentoxide flake. Required components V2O597 ~ 99%, P <0.05%, S <0.05%, Na2O + K2O <1.5%. In addition also from Ferro Vanadium-containing concentrates or vanadium-containing carbonaceous shale extraction of vanadium pentoxide directly through chemical treatment.
Role:
Ferro Vanadium steel industry is an important alloying additives. Vanadium improves the strength of steel, toughness, ductility and heat resistance. Since the 1960s, vanadium in the steel industry in the application sharp increase in consumption in 1988 accounted for 85% of vanadium. The consumption of vanadium in the steel aspect ratio of 20% carbon steel, high-strength low-alloy steel accounted for 25%, 20% steel, tool steel, accounting for 15%. Vanadium-containing high-strength low-alloy steel (HSLA) is widely used for its high strength oil / gas pipelines, buildings, bridges, rail, pressure vessels, aircraft and other production car construction. Various vanadium steel increasingly wide range of applications, the relevant talent is increasingly important to collect more data Shui Road metal mesh.
Vanadium alloy is mainly used in the production of non-ferrous alloy of vanadium, such as Ti-6Al-4V, Ti-6Al-6V-2Sn and Ti-8Al-1V-Mo and so on. Ti-6Al-4V alloy is used in the manufacture of aircraft and rocket excellent high temperature structural materials, highly valued in the United States, accounted for vanadium titanium based alloys for more than half. Vanadium can be used for magnetic materials, cast iron, alloy, superconducting materials and nuclear materials.
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From:Metal materials
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