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

Inactive Publication Date: 2014-11-26
SINO PLATINUM METALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These processes are mainly to enrich and recover niobium and tantalum from raw ore or slag, ...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

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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PUM

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Abstract

The invention discloses a method for enriching and recycling niobium and tantalum from a waste high-temperature alloy. The method comprises the following steps: smelting, atomizing and spraying the waste high-temperature alloy, and leaching nickel, cobalt, tungsten, molybdenum and rhenium out to obtain materials; and then, carrying out alkali fusion, water leaching and acid treatment to obtain a niobium-tantalum-containing oxide. The raw materials related in the method are the materials obtained after the nickel, the cobalt, the tungsten, the molybdenum and the rhenium of the waste high-temperature alloy are leached out at the early stage, and thus, the method is a sustainable green environment-friendly process which can realize resource cyclic utilization, is free of harmful waste gas and wastewater, and has very good practicability, economic benefits and social benefits.

Description

technical field [0001] The invention belongs to the field of combining pyrometallurgy and hydrometallurgy, and in particular relates to a method for enriching and recovering niobium and tantalum from waste superalloys. Background technique [0002] Scrap superalloys contain valuable metals such as nickel, cobalt, tungsten, molybdenum, rhenium, niobium, and tantalum. Although more and more attention has been paid to the recycling of superalloy waste in recent years, niobium and tantalum are rare and precious metals, and their content in alloys is generally relatively small Therefore, the recovery process is complicated, the equipment investment is large, and the product cost is high. Especially, there are relatively few studies on the enrichment and recovery of niobium and tantalum from waste superalloys. At present, the methods for separation, enrichment and recovery of niobium and tantalum mainly include alkali fusion method, solvent extraction method, acid leaching method,...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B34/24
CPCY02P10/20
Inventor 吴跃东范兴祥董海刚行卫东赵家春李博捷
Owner SINO PLATINUM METALS CO LTD
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