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This article describes the application, distribution and reserves of vanadium enrichment from roasting, the two discussed the pros and cons of various vanadium extraction methods as well as new vanadium extraction technology, ultimately preferred composite additives roasting - some flooding - Sec peroxide hydrogen dip - ion exchange - Shen vanadium environmentally friendly and economic process route, study and enrichment of vanadium and purification. A static method, the adsorption amount as a standard final screening D301 macroporous styrenic weakly basic anion exchange resin. Using static and dynamic method to the adsorption section: containing vanadium dope concentration, containing vanadium dope flow rate, adsorption time, temperature, amount of resin, containing vanadium dope Cl-concentration and the amount of adsorption relationship. Vanadium-containing dope Cl-concentration of the resin adsorption amount reaction, but little effect adsorption vanadium; temperature, promoting D301 ion exchange resin adsorption; increase in amount of the resin, the resin adsorption amount becomes larger, but the unit amount of resin adsorption falling instead of rising. As the adsorption of the passage of time, the resin adsorption amount is also increased, 20g resin at 90h after adsorption reached equilibrium, the saturation adsorption amount to 148mg / g. Particle diffusion speed determines the speed of the entire reaction, low concentration, low flow rate conducive to the adsorption of the resin, a suitable concentration is about 4.1537g / L, a suitable flow rate of 0.25 ml about. 3. Reduction and precipitation purification processing the tail solution of harmful ingredients discussed Na2S dosage, Na2S03 dosage, reaction time, pH value in the Cr6 tail liquid, Cu2, Zn2, Ni2, Cd2 removal rate impact . Results: Na2S dosage increase Cu2, Zn2, Ni2, Cd2 removal efficiency are promoted; Na2S03 increased use of Cr6 removal rate increase; is Na2S suitable for 100mL tail liquid dosage 74.8038mg Na2S03 appropriate amount for 147.5208mg ; removal of acidic conducive Cr6, pH = 2.07, the minimum concentration, alkaline conducive to the removal of Cu2, Zn2, Ni2, Cd2, pH = 8.35 when preferred; longer the reaction time, the lower the concentration of each ion, the reaction 15min harmful ions basically removed to meet emission standards. Finally, dynamic method, conducted a study of the reference amount of the desorption stage. Desorbent combination of 4% NaOH 6% NaCl best desorbent desorption effect. The peak of the desorption solution up to 112g / L, the average desorption concentration is 50g/L-90g/L enrichment factor of 10-20 times the optimal dosage of the desorbent is three to four times the resin volume, suitable flow rate of 0.7mL/min.
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