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Method for recycling rhenium from tungsten-rhenium alloy waste

A technology of tungsten-rhenium alloy and waste materials, which is applied in the field of metallurgy and can solve problems such as high energy consumption and complex collection of rhenium

Active Publication Date: 2017-02-22
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Oxidative volatilization method has high energy consumption and complex collection of rhenium

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The method for recovering rhenium from tungsten rhenium alloy waste in this embodiment includes the following steps:

[0037] Step 1. Perform electrochemical dissolution treatment on 100g of tungsten-rhenium alloy scrap containing 25wt% rhenium. The specific process is: using tungsten-rhenium alloy scrap as anode, titanium sheet as cathode, and 500 mL of NaOH solution with a concentration of 5% by mass as Electrolyte, put the anode and cathode in the electrolyte, then energize between the cathode and the anode, adjust the voltage to 1.5V, and find that the cathode quickly produces a lot of bubbles. At this time, the anode begins to dissolve and no powdery anode mud is found. A small amount of filamentous alloy dropped into the solution. After 6 hours, the Re concentration in the electrolyte was 20g / L and the W concentration was 60g / L. Stop the electrolysis, filter the filtrate to obtain the rhenium-containing solution;

[0038] Step 2: Add excess potassium chloride to the rh...

Embodiment 2

[0041] The method for recovering rhenium from tungsten rhenium alloy waste in this embodiment includes the following steps:

[0042] Step 1. Perform electrochemical dissolution treatment on 100g of tungsten-rhenium alloy scrap containing 25wt% rhenium. The specific process is: using tungsten-rhenium alloy scrap as anode, titanium flake as cathode, and 500mL of NaOH solution with 10% mass percentage concentration as Electrolyte, put the anode and the cathode in the electrolyte, then energize between the cathode and the anode, adjust the voltage to 3V, and find that the cathode quickly produces a large number of bubbles. At this time, the anode begins to dissolve. No powdery anode mud is found, but a small amount The filamentous alloy dropped into the solution. After 4 hours, the Re concentration in the electrolyte was 20g / L and the W concentration was 60g / L. Stop the electrolysis, filter the filtrate to obtain the rhenium-containing solution;

[0043] Step 2: Add excess potassium ch...

Embodiment 3

[0046] The method for recovering rhenium from tungsten rhenium alloy waste in this embodiment includes the following steps:

[0047] Step 1. Perform electrochemical dissolution treatment on 100g of tungsten-rhenium alloy waste containing 26wt% rhenium. The specific process is: using tungsten-rhenium alloy waste as anode, titanium flake as cathode, and 500 mL of NaOH solution with 10% mass percentage concentration as Electrolyte, put the anode and cathode in the electrolyte, then energize between the cathode and the anode, adjust the voltage to 1.5V, and find that the cathode quickly produces a lot of bubbles. At this time, the anode begins to dissolve and no powdery anode mud is found. A small amount of filamentous alloy fell into the solution. After 6 hours, the Re concentration in the electrolyte was 30g / L and the W concentration was 85.4g / L. Stop electrolysis, filter the filtrate to obtain a rhenium-containing solution;

[0048] Step 2: Add excess potassium chloride to the rheni...

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Abstract

The invention provides a method for recycling rhenium from tungsten-rhenium alloy waste. The method comprises the following steps that 1, the tungsten-rhenium alloy waste is subjected to electrochemical dissolution, and a rhenium-containing solution is obtained; 2, excessive potassium chloride is added into the rhenium-containing solution, rhenium in the rhenium-containing solution is made to perform a precipitation reaction with potassium chloride to generate KReO4 precipitations, then, the KReO4 precipitations are subjected to recrystallization, and high-purity KReO4 is obtained. The technology is simple, the problem of collecting rhenium in a comparison oxidation volatilization method does not exist, and the rhenium recovery rate is high. Due to the fact that both a traditional oxidation volatilization method and a niter fusion-ion exchange method are implemented under the high-temperature condition, comparatively, the technology is low in energy consumption.

Description

Technical field [0001] The invention belongs to the technical field of metallurgy, and specifically relates to a method for recovering rhenium from tungsten rhenium alloy waste. Background technique [0002] Rhenium is located in group ⅦB of the periodic table and belongs to the rare metal. Due to its high melting point, high hardness, creep resistance, corrosion resistance and good plasticity, rhenium can be widely used in thermocouples, metal coatings and the electronics industry. Its role in the manufacture of aero-engine turbine blades and engine nozzles cannot be replaced by other metals. In addition, rhenium has high catalytic activity, and the platinum-rhenium catalyst composed of platinum and precious metal platinum is a good catalyst in the process of catalytic cracking and reforming of petroleum. [0003] Tungsten and rhenium are rare and refractory metals. The melting point of tungsten is the highest among all metals, reaching 3360°C, followed by rhenium with a melting...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G47/00C01G41/00C22B7/00C22B61/00
CPCC01G41/00C01G47/00C01P2006/80C22B7/006C22B61/00Y02P10/20
Inventor 吴永谦陈昆昆张卜升操齐高郭瑞孟晗琪李进
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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