Novel process for extracting vanadium from bone coal vanadium ore by resin-in-slurry method

Abstract

The invention relates to a novel technology for extracting vanadium from stone coal vanadium ore through a resin-ore pulp method. Roasting clinkers are leached by 0.6 percent of sulfate and large-block materials are screened, and the pH value is adjusted between 3-3.5. Inside an exchange tower, the resin and the ore pulp are fully mixed by double stirring of air and mechanisms to achieve the exchange between vanadate radical and the resin. After the exchange is finished, the resin and the ore pulp are separated through an isolation screen, the resin is conveyed to an upper grade exchange tower through an airlift, and the ore pulp is flowed into a next grade exchange tower through the free drop height of the exchange tower; after the exchange is finished, the lean ore pulp directly enters into a tailing dam. Saturated resin is conveyed to a vibrating screen through the airlift and washed cleanly by pressurized clean water, and then the resin is conveyed to a desorption tower and is desorbed by 8 percent of NaOH; the content of vanadium pentoxide in desorption solution reaches to 25-30 g / L; under the condition of guaranteeing the pH value being equal to10, 2-3 percent of NH4Cl and 2 percent of MgCl2 purification agent are used for purifying the desorption vanadium solution after being heated at 90 DEG C of constant temperature, and then thermal filtration is carried out. The vanadium solution after slightly cooling is filtered through a millipore filter. After the content of inspected impurities meets the requirement of vanadium precipitation, the vanadium precipitation is stirred for 10 hours by purified solution added with the NH4Cl, and obtained NH4VO3 is incandesced with enough 550 DEG C oxygen after dehydration and washing, thus obtaining V2O5 product with over 98 percent of metallurgical grade.

Description

technical field [0001] The invention relates to a new technology for extracting vanadium from stone coal vanadium ore by using resin in slurry method. It selects D301G resin to directly exchange ore pulp ion exchange in the exchange tank to achieve the enrichment and separation of vanadate, and then conducts the saturated resin Washing, elution, purification and preparation of refined vanadium, etc., realize the new process of wet extraction of vanadium pentoxide from stone coal vanadium ore by resin in slurry method. Background technique [0002] Through the investigation of more than 20 manufacturers of vanadium extraction from stone coal that have been put into production in China, they basically use flat kiln roasting, acid leaching, natural sedimentation or solid-liquid separation, then use the clear liquid to exchange vanadium, and finally wash The process of removing, purifying and preparing vanadium concentrate achieves the extraction of vanadium pentoxide from stone...

AI Technical Summary

Problems solved by technology

Overcome the difficulties of solid-liquid separation, low vanadium recovery rate, high labor intensity and poor working environment, the comprehensive recovery rate of vanadium in stone coal vanadium ore can reach more than 65%.

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