An example of the process of extracting V2O5 from vanadium slag in the former Soviet Union Chusov plant

Former Soviet Union Chusov Factory

The process is shown in Figure 1.

Figure 1 Wet process of the former Soviet Union Chusov plant

1. Removal of iron : first remove the large piece of iron by hand, then grind it to 1.0mm, and magnetically separate the iron particles;

2. Sodium oxide roasting: with sodiuming agent Na ₂ CO ₃ , NaCl, Na ₂ SO ₄ , calcined at 850-950 ° C, the rotary kiln used is 2.5 m in diameter, 42 m long, and the processing capacity is 2500-3200 kg/h. . The water-soluble dip leaching rate of vanadium after calcination is 85% to 92%.

3. Leaching: firstly add water immersion, liquid-solid ratio 3.5/1, 40-50 ° C, the residue after filtration contains 0.6% V ₂ O ₅ , and sent to the second step to add acid leaching.

Fourth, vanadium: the use of acidic hydrolysis of vanadium, red cake. Finally, the melt contains 89% to 90% of V ₂ O ₅ .

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