High Level Material Ferro Vanadium 80

The amount of silicon in ferro vanadium 80 was determined by silicon-molybdenum blue luminometry, the sample was dissolved with dilute nitric acid, and in the weak acid medium, silicic acid and ammonium molybdate were generated into silicon-molybdenum heteropolyacids, and in the presence of oxalic acid, ammonium ferrous sulfate was reduced to silicon-molybdenum blue, and its absorbance was measured. This method has the characteristics of short analysis period, high sensitivity, good stability and good reproducibility. Applicable range: 0.10%~2.00%.

1.In the grinding process of ferro vanadium 80, the selection of adhesive after ferrovanadium grinding was studied, a binder that could be bonded and harmless to ferrovanadium products was screened, and a spindle mold for ferrovanadium cake pressing was designed. The experimental results show that the nitriding temperature suitable for FeV50 fine powder is 1250~1300°C, the nitriding temperature suitable for FeV80 fine powder is 1350~1400°C, and the nitriding time is about 1 h, and the nitrogen content of FeV50 test products is more than 5% and 12% under these conditions.A method for preparing ferrovanadium from a low-content solution of vanadium, the method first adjusts the pH value of the solution to 5~6, then adds divalent iron ions, and then adjusts the pH of the solution to 7~8.5 to generate a precipitate, adds aluminum particles and lime to the precipitate, mixes evenly, and puts it into the induction furnace to heat up the reaction to obtain ferrovanadium. It is also possible to adjust the ratio of vanadium and iron in the precipitate to produce different ferrovanadium. The method of the present invention directly uses ferric vanadate precipitation as raw material, simplifies the process steps, and the method is convenient to operate, and can enriche vanadium in the solution very effectively with divalent iron ions, especially suitable for the preparation of ferrovanadium by enriching and extracting vanadium from the neutral, acidic leaching solution after roasting from low-grade vanadium-containing ore with low sodium, high calcium, calcium method, empty ore and other methods.

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