Method for enriching and recycling niobium and tantalum from waste high-temperature alloy
A high-temperature alloy, waste technology, applied in the direction of improving process efficiency, to achieve the effects of low equipment investment cost, simple operation, and efficient recycling
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Embodiment 1
[0023] Weigh 5g of treated alloy slag (tungsten 3.11%, molybdenum 5.31%, rhenium 0.23%, niobium 1.66%, tantalum 32.00%), weigh 30g of strong sodium oxide, mix with the slag evenly, and heat at 800°C , roasted for 3 hours, and then leached with water at 95°C for 1.5 hours. After filtration and washing, the leached residue was leached with 5% hydrochloric acid for 60 minutes, filtered, washed and dried. Niobium leaching rate is 0.25%, tantalum leaching rate is 0.36%, which are well enriched in the slag, and other metal leaching rates are over 99.50%, which are enriched in the leaching solution.
Embodiment 2
[0025] Weigh 5g of treated alloy slag (tungsten 1.21%, molybdenum 2.31%, rhenium 0.25%, niobium 1.68%, tantalum 30.20%), weigh 25g of strong sodium oxide, mix with slag evenly, and heat at 600°C , roasted for 2 hours, and then leached with 85°C water for 1.5 hours. After filtration and washing, the leached residue was leached with 10% hydrochloric acid for 60 minutes, filtered, washed and dried. Niobium leaching rate is 0.19%, tantalum leaching rate is 0.32%, well enriched in slag, other metal leaching rate is over 98.44%, well enriched in leaching solution.
Embodiment 3
[0027] Weigh 5g of treated alloy slag (tungsten 2.71%, molybdenum 4.52%, rhenium 0.19%, niobium 1.82%, tantalum 28.93%), weigh 35g of strong sodium oxide, mix with the slag evenly, and heat at 700°C , roasted for 4 hours, and then leached with 95 ° C water for 2 hours, filtered and washed, and the leached residue was leached with 5% hydrochloric acid for 90 minutes, filtered, washed and dried. Niobium leaching rate is 0.16%, tantalum leaching rate is 0.27%, effectively enriched in slag, other metal leaching rate is over 99.28%, well enriched in leaching solution.
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