Method for removing silicon and phosphorus from blank roasting-ammonia leaching vanadium extracting solution
A blank roasting and ammonia leaching technology, applied in the direction of improving process efficiency, can solve the problems of incomplete silicon removal by silicon remover, increase vanadium loss, difficult to clarify vanadium liquid, etc., and achieve good environmental and economic benefits and vanadium loss. The effect of lowering and lowering production costs
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[0018]The embodiment of the present invention provides a method for removing silicon and phosphorus from the vanadium solution by blank roasting-ammonia leaching:
[0019]The polyacrylamide and water are mixed at a mass ratio of 1:3000-5000, heated to 35-45°C, and stirred at a stirring speed of 350-400 r / min for 40-80 min to obtain an aqueous polyacrylamide solution.
[0020]Control the blank roasting-ammonia leaching vanadium solution (silicon content is 131ppm, phosphorus content is 36ppm), the vanadium concentration is 8-10g / L, the pH value is 7-7.3, and the prepared polyacrylamide aqueous solution is added to the blank roasting -In the ammonia leaching vanadium solution, the volume ratio of the added amount of the flocculant solution to the blank roasting-ammonia leaching vanadium solution is 1:320~400, flocculate and settle at 60~70℃ for 20~40min, then use a fine filter Solid-liquid separation. The specific values of each example are shown in Table 1.
[0021]Table 1
[0022...
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