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Method for recycling tantalum from tantalum-containing alloy waste

A technology of tantalum alloy and scrap, which is applied in the field of hydrometallurgy, can solve the problems of high-efficiency recovery that have not been found yet, and achieve the effect of easy operation

Inactive Publication Date: 2014-05-07
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Up to now, no reports have been found on the efficient recovery of tantalum from tantalum-containing alloy scrap

Method used

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  • Method for recycling tantalum from tantalum-containing alloy waste

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Embodiment 1

[0032] The main metal components of the tantalum-containing alloy scrap to be treated in this embodiment are calculated by weight percentage: Ta34.98%, Ti17.27%, Hf16.93%, W1.74%, Fe0.96%, Ni0.75%, Cr0.36%. combine figure 1 The method for recovering tantalum from tantalum-containing alloy waste in this embodiment comprises the following steps:

[0033] Step 1. Weigh 15g of tantalum-containing alloy waste, then measure 90mL of hydrofluoric acid with a concentration of 12mol / L according to the solid-to-liquid ratio of 1:6, and then use hydrofluoric acid as the leaching agent to leach tantalum in the tantalum-containing alloy waste treatment, the temperature of the leaching treatment is 90°C, and the time of the leaching treatment is 1.5h to obtain a tantalum-containing leach solution; in the specific implementation process, hydrofluoric acid and tantalum-containing alloy waste can be placed together in a 500mL polytetrafluoroethylene beaker , and then seal the mouth of the bea...

Embodiment 2

[0041] The main metal components of the tantalum-containing alloy scrap to be treated in this embodiment are calculated by weight percentage: Ta31.75%, Nb15.26%, Ti13.58%, Hf11.36%, W1.17%, Zr1.03%, Fe0.78%, Ni0.66%, Cr0.55%. combine figure 1 The method for recovering tantalum from tantalum-containing alloy waste in this embodiment comprises the following steps:

[0042] Step 1. Weigh 15g of tantalum-containing alloy waste, then measure 135mL of hydrofluoric acid with a concentration of 11mol / L according to the solid-to-liquid ratio of 1:9, and then use hydrofluoric acid as the leaching agent to leach the tantalum in the tantalum-containing alloy waste treatment, the temperature of the leaching treatment is 85°C, and the time of the leaching treatment is 2.5h to obtain a tantalum-containing leach solution; in the specific implementation process, hydrofluoric acid and tantalum-containing alloy waste can be placed together in a 500mL polytetrafluoroethylene beaker , and then sea...

Embodiment 3

[0050] The main metal components of the tantalum-containing alloy waste to be treated in this embodiment are calculated by weight percentage: Ta20.12%, Nb17.58%, Ti13.11%, Hf13.06%, Zr4.15%, Fe0.62%, Ni0.49%, Cr0.47%, Co0.11%. combine figure 1 The method for recovering tantalum from tantalum-containing alloy waste in this embodiment comprises the following steps:

[0051] Step 1. Weigh 15g of tantalum-containing alloy waste, and then measure 120mL of hydrofluoric acid with a concentration of 8mol / L according to the solid-to-liquid ratio of 1:8, and then use hydrofluoric acid as the leaching agent to leach tantalum in the tantalum-containing alloy waste treatment, the temperature of the leaching treatment is 70°C, and the time of the leaching treatment is 2 hours to obtain a tantalum-containing leach solution; in the specific implementation process, hydrofluoric acid and tantalum-containing alloy waste can be placed together in a 500mL polytetrafluoroethylene beaker, Then sea...

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Abstract

The invention provides a method for recycling tantalum from tantalum-containing alloy waste, which comprises the following steps: (I) performing leaching treatment on tantalum in the tantalum-containing alloy waste by use of hydrofluoric acid; (II) performing extraction treatment on the leachate by use of methyl isobutyl ketone to obtain extraction liquid; (III) performing pickling and impurity removal on the extraction liquid by use of sulfuric acid; (IV) performing back extraction treatment on the extraction liquid after the impurity removal by use of pure water to obtain back extraction liquid; (V) dropwise adding ammonia water into the back extraction liquid to obtain turbid liquid; (VI) filtering the turbid liquid and drying to obtain tantalum hydroxide. In the invention, the research and development work is carried out according to the characteristics that the tantalum-containing alloy raw material contains multiple types of impurities and tantalum is difficult to separate, a new method for recycling tantalum from the tantalum-containing waste is proposed, the tantalum recycling rate is high, and the method has good industrial prospects.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy, and in particular relates to a method for recovering tantalum from tantalum-containing alloy waste. Background technique [0002] Tantalum is a rare metal with high melting point and high boiling point. It has the characteristics of gas absorption, superconductivity, corrosion resistance, unipolar conductivity and high strength at high temperature. It is widely used in electronics, precision glass, hard alloy, superconductivity, aerospace, Nuclear energy, biomedical engineering and other fields. my country's tantalum reserves are considerable, but the grade is low and the mining cost is high. In 2007, the annual output of tantalum mines in my country was tantalum: 136t (converted into Ta 2 o 5 In addition, tantalum is an important strategic reserve metal, and its import is affected by the international situation, while superalloys contain a considerable amount of tantalum. In 2006, the ...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B3/06C22B3/26C22B3/44C22B34/24
CPCY02P10/20
Inventor 张卜升许万祥吴永谦郭瑞吴贤马光李进
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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