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A method for recovering nickel-based superalloy

A technology of nickel-based superalloy and concentration, which is applied to the improvement of process efficiency, instruments, optics, etc., can solve the problems of high hardness of nickel-based superalloy, high electrochemical stripping efficiency, complex production process, etc., and reduce corrosion resistance , The effect of shortening the acid leaching treatment time and simplifying the treatment process

Active Publication Date: 2021-05-07
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of wet treatment is that it can effectively separate and recover various metal elements, the product has high purity, high degree of resource utilization, can recover scattered metals in alloy waste, and has low energy consumption; the disadvantage is that the process is long and the production process is complicated
[0004] Due to the high melting point of nickel-based superalloys, the conditions for traditional pyro-smelting treatment are relatively harsh, high-temperature smelting equipment is required, and energy consumption is high. In addition, nickel-based superalloys have high hardness and are difficult to break. The efficiency of acid leaching is low, while the efficiency of electrochemical leaching is slightly higher but time-consuming

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for recovering nickel-based superalloys. The mass percent content of each component in the nickel-based superalloy is: nickel: 54.2%~66.3%, cobalt: 8.5%~9.05%, chromium: 3.8%~4.8%, aluminum: 5.2%~6.2%, tungsten: 7.0%~9.0%, tantalum: 6.0%~8.5%, niobium: 0%~1.2%, molybdenum: 1.5%~2.5%, hafnium: 0.05%~1.5%, rhenium: 1.6% ~2.4%, iron: 0%~0.3%, manganese: 0%~0.15%, zirconium: 0%~0.1%, titanium: 0%~0.1%, copper: 0%~0.1%, magnesium: 0%~0.003 %, and the rest are unavoidable impurities; adding gallium liquid to the nickel-based superalloy, using metal gallium to heat treat the nickel-based superalloy at a lower temperature to prepare a precursor, can effectively break the nickel-based superalloy, and can effectively improve the nickel-based superalloy. The leaching efficiency of superalloys specifically includes the following steps:

[0026] (1) The nickel-based superalloy block was ultrasonically cleaned with acetone for 15 minutes, rinsed with deionized water for 3 t...

Embodiment 2

[0033] A method for recovering nickel-based superalloys. The mass percent content of each component in the nickel-based superalloy is: nickel: 54.2%~66.3%, cobalt: 8.5%~9.05%, chromium: 3.8%~4.8%, aluminum: 5.2%~6.2%, tungsten: 7.0%~9.0%, tantalum: 6.0%~8.5%, niobium: 0%~1.2%, molybdenum: 1.5%~2.5%, hafnium: 0.05%~1.5%, rhenium: 1.6% ~2.4%, Iron: 0%~0.3%, Manganese: 0%~0.15%, Zirconium: 0%~0.1%, Titanium: 0%~0.1%, Copper: 0%~0.1%, Magnesium: 0%~0.003 %, and the rest are unavoidable impurities; adding gallium liquid to the nickel-based superalloy, using metal gallium to heat treat the nickel-based superalloy at a lower temperature to prepare a precursor, can effectively break the nickel-based superalloy, and can effectively improve the nickel-based superalloy. The leaching efficiency of superalloys specifically includes the following steps:

[0034] (1) The nickel-based superalloy block was ultrasonically cleaned with acetone for 15 minutes, rinsed with deionized water for 5 t...

Embodiment 3

[0041] A method for recovering nickel-based superalloys. The mass percent content of each component in the nickel-based superalloy is: nickel: 54.2%~66.3%, cobalt: 8.5%~9.05%, chromium: 3.8%~4.8%, aluminum: 5.2%~6.2%, tungsten: 7.0%~9.0%, tantalum: 6.0%~8.5%, niobium: 0%~1.2%, molybdenum: 1.5%~2.5%, hafnium: 0.05%~1.5%, rhenium: 1.6% ~2.4%, Iron: 0%~0.3%, Manganese: 0%~0.15%, Zirconium: 0%~0.1%, Titanium: 0%~0.1%, Copper: 0%~0.1%, Magnesium: 0%~0.003 %, and the rest are unavoidable impurities; adding gallium liquid to the nickel-based superalloy, using metal gallium to heat treat the nickel-based superalloy at a lower temperature to prepare a precursor, can effectively break the nickel-based superalloy, and can effectively improve the nickel-based superalloy. The leaching efficiency of superalloys specifically includes the following steps:

[0042] (1) The nickel-based superalloy block was ultrasonically cleaned with acetone for 12 minutes, rinsed with deionized water for 4 t...

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Abstract

The invention discloses a method for recovering nickel-based superalloys. Metal gallium is added to the nickel-based superalloy, and the metal gallium is heat-treated with the nickel-based superalloy at a lower temperature to prepare a precursor, effectively crushing the nickel-based superalloy, and increasing the nickel-based superalloy. The leaching efficiency of the nickel-based superalloy provides favorable conditions for the subsequent separation and recovery of various elements, and realizes the efficient recovery of the nickel-based superalloy; compared with the pulverization methods such as melting powder spraying, the heat treatment temperature of the present invention is low, and it can effectively crush high temperature resistance and corrosion resistance The nickel-based high-temperature alloy can effectively reduce energy consumption; the invention can recover metal gallium for recycling, and has the advantage of environmental protection.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metal recycling, and in particular relates to a method for recycling nickel-based superalloys. Background technique [0002] Nickel-based superalloys are a class of high-temperature structural materials based on nickel, which can serve in high-temperature environments above 600°C and withstand severe mechanical stress. Nickel-based superalloys have high room temperature and high temperature strength, good oxidation resistance and hot corrosion resistance, excellent creep and fatigue resistance, good structural stability and reliability, and are widely used in advanced power propulsion systems such as turbine engines Hot end parts. At present, nickel alloys account for half of the total weight of advanced engines, and modern aircraft turbine blades are almost entirely made of nickel-based superalloys. [0003] At present, the methods of processing nickel-based alloy waste can be divided into: ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B23/00C22C19/05C22B7/00C22B34/24C22B34/36C22B3/38C25C1/22C22B1/00
CPCC22B1/005C22B7/007C22B7/008C22B23/0423C22B23/043C22B34/24C22B34/36C22C19/057C25C1/22C22B3/3846Y02P10/20
Inventor 李彬段云彪胡劲王玉天
Owner KUNMING UNIV OF SCI & TECH
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