Additive and method for extracting vanadium by roasting stone coal ores and preparation method thereof
An additive and stone coal mine technology, which is applied to the additive and preparation of vanadium extraction from ore, and the field of vanadium pentoxide extraction, which can solve the problems of low extraction rate, large pollution, and high energy consumption, so as to improve the total recovery rate and reduce energy consumption. , high conversion rate effect
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Embodiment 1
[0012] Take 100 grams of TiO 2 Disperse in 500 ml of 1mol / L H 2 SO 4 Among them, TiO 2 :H 2 SO 4 (Mass ratio) 100:49; then press TiO 2 : WO 3 (Mass ratio) 100:3 WO 3 Dosing amount Add sodium tungstate (Na 2 WO 4 ). After soaking for 6 hours, it was dried at 100°C and calcined at 500°C for 5 hours to prepare the additive. The additive contains titanium oxide and tungsten oxide, and TiO 2 、WO 3 Formal Computing, TiO 2 with WO 3 The mass ratio is 100:3.
[0013] Take 100 grams of a stone coal mine sample in a certain place in Hunan, the grade of vanadium pentoxide is 1.2% after determination, and it is crushed to a particle size of 80-120 mesh, and 1 gram of the above-mentioned additive powder is added thereto, that is, the addition amount is 1% (mass percentage), After stirring evenly, add water to form small balls with a diameter of 1.2 to 1.5 cm, put the mixed balls prepared above in a muffle furnace for 3 hours at 700 ° C, and cool to room temperature naturally...
Embodiment 2
[0015] Take 100 grams of TiO 2 Dispersed in 500 ml of 2.5mol / L H 2 SO 4 Among them, TiO 2 :H 2 SO 4 (Mass ratio) 100:122.5; then press TiO 2 : WO 3 (Mass ratio) 100:5 WO 3 Dosing amount Add sodium tungstate (Na 2 WO 4 ). The additive is prepared by soaking for 8 hours, drying at 100° C., and roasting at 400° C. for 6 hours. The additive contains titanium oxide and tungsten oxide, and TiO 2 、WO 3 Formal Computing, TiO 2 with WO 3 The mass ratio is 100:5.
[0016] Get 500g of the same ore sample as in Example 1, after being pulverized to a particle size of 80-120 mesh, add 15 grams of the above-mentioned additives, that is, the addition amount is 3% (mass percentage), mix evenly, pellets are roasted, and the roasting mechanism is the same as that of Example 1 Basically the same, the roasting temperature is 900°C, the roasting time is 4 hours, the calcined sand after roasting is leached with sulfuric acid with a mass concentration of 4%, the leaching solid-liquid m...
Embodiment 3
[0018] Take 100 grams of TiO 2 Disperse in 500ml of 0.5mol / L H 2 SO 4 Among them, TiO 2 :H 2 SO 4 (Mass ratio) 100:24.5; then press TiO 2 : WO 3 (Mass ratio) 100:4 WO 3 Dosing amount Add sodium tungstate (Na 2 WO 4 ). The additive was prepared by soaking for 2 hours, drying at 100° C., and roasting at 300° C. for 6 hours. The additive contains titanium oxide and tungsten oxide, and TiO 2 、WO 3 Formal Computing, TiO 2 with WO 3 The mass ratio is 100:4.
[0019] Get 400g of the same ore sample as in Example 1, after being crushed to a particle size of 80-120 mesh, add 8 grams of the above-mentioned additives, that is, the addition amount is 2% (mass percentage), mix evenly, pellet roast, and the roasting mechanism is the same as that of Example 1 Basically the same, the roasting temperature is 800°C, the roasting time is 3.5 hours, the roasted calcined sand is leached with sulfuric acid with a mass concentration of 3.5%, the leaching solid-liquid mass ratio is 1:4...
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