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 .
Pre- treatment:
1. Steel material : oil disposing and rust removing , phosphorization treatment
2. Aluminum : derosination and chromating treatment
* Test the pre- treatment in every two hours , testing methods should in comply with the drug supplier or according to user manual of our pre- treatment
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