Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for ultrasonically leaching valuable elements from high temperature alloy scraps for comprehensive utilization

A technology of superalloy and valuable elements, which is applied in the field of comprehensive utilization of superalloy waste by ultrasonic leaching, can solve the problems of inability to comprehensively recover valuable alloy elements, low alloy dissolution efficiency, equipment corrosion, etc., so as to avoid strong oxidation The effect of using acid, improving leaching efficiency and reducing equipment corrosion

Inactive Publication Date: 2020-06-26
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
View PDF14 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Aiming at the technical problems of low alloy dissolution efficiency, high energy consumption, serious equipment corrosion and high cost in the existing high-temperature alloy waste dissolution technology, and the comprehensive recovery of valuable alloy elements, the invention provides an ultrasonic leaching high-temperature alloy waste effective The method of comprehensive utilization of valence elements adopts a two-stage leaching method, that is, firstly, through the reaction of high-temperature alloy waste with dilute sulfuric acid or dilute hydrochloric acid, the soluble elements such as nickel, cobalt, aluminum, and chromium in the alloy waste are directionally leached, and the high-temperature alloy waste is leached by dilute acid. , solid-liquid separation to obtain a nickel-cobalt-containing solution, the nickel-cobalt solution is subjected to cooperative extraction and stripping, to obtain a pure nickel-cobalt solution, and the nickel-cobalt solution is treated by controllable coupling co-precipitation to obtain nickel-cobalt hydroxide battery-grade raw materials, raffinate Return to the leaching section to realize the recycling of dilute acid without discharging the waste acid solution; react the leaching residue with concentrated hydrochloric acid and hydrogen peroxide under the action of ultrasonic waves, and the obtained leaching solution undergoes ion exchange, analysis, crystallization, and purification to obtain pure ammonium rhenate product

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for ultrasonically leaching valuable elements from high temperature alloy scraps for comprehensive utilization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The method for the comprehensive utilization of superalloy waste in this embodiment is carried out according to the following steps:

[0036] (1) A kind of nickel-based superalloy cutting waste is mixed with hydrochloric acid with a weight concentration of 15% according to the liquid-solid ratio of 10mL:1g, and is sent into the reactor (leaching section), and the reaction time is 2h. After the reaction, solid-liquid separation is obtained to obtain Nickel-cobalt solution and leaching residue I, wherein the leaching rate of nickel reaches 99.32%, and the leaching rate of cobalt reaches 98.67%;

[0037] (2) After the nickel-cobalt solution obtained in step (1) is through cooperative extraction and stripping, the intermediate product of pure nickel-cobalt solution is obtained; the nickel-cobalt hydroxide battery-grade raw material is obtained through controllable coupling co-precipitation technology, and its impurity content is less than 1 wt%.

[0038] (3) The raffinate ...

Embodiment 2

[0043] The method for the comprehensive utilization of superalloy waste in this embodiment is carried out according to the following steps:

[0044] (1) A kind of nickel-based superalloy grinding waste and weight concentration are 10% hydrochloric acid according to liquid-solid 8mL: 1g mix, send in the reactor, reaction time 1h, solid-liquid separation after the reaction, obtain the solution containing nickel and cobalt , wherein the leaching rate of nickel reaches 99.12%, and the leaching rate of cobalt reaches 98.47%;

[0045] (2) From the nickel-cobalt solution in step (1) through collaborative extraction and stripping, the intermediate product of pure nickel-cobalt solution is obtained, and the nickel-cobalt hydroxide battery-grade raw material is obtained through controllable coupling coprecipitation technology, and its impurity content is less than 1wt %.

[0046] (3) The raffinate is returned to the leaching section to realize the recycling of dilute acid, and no waste...

Embodiment 3

[0051] The method for the comprehensive utilization of superalloy waste in this embodiment is carried out according to the following steps:

[0052] (1) A kind of nickel-base superalloy bulk waste material and the dilute sulfuric acid of 2.5mol / L mix according to liquid-solid ratio 8mL:1g, send in the reactor, reaction time 3h, solid-liquid separation after the reaction, obtain nickel-cobalt-containing solution, wherein the leaching rate of nickel reaches 98.32%, and the leaching rate of cobalt reaches 99.14%;

[0053] (2) From the nickel-cobalt solution in step (1) through collaborative extraction and stripping, the intermediate product of pure nickel-cobalt solution is obtained; the nickel-cobalt hydroxide battery-grade raw material is obtained through controllable coupling coprecipitation technology, and its impurity content is less than 1wt %.

[0054] (3) The raffinate is returned to the leaching section to realize the recycling of dilute acid, and no waste acid solution...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for ultrasonically leaching valuable elements from high temperature alloy scraps for comprehensive utilization, and belongs to the technical field of comprehensive recovery and utilization of the high temperature alloy scraps. The method includes the steps that a segmental leaching method is adopted, and soluble elements (mainly nickel and cobalt) in a high temperature alloy are leached by dilute acid, so that the rhenium-containing tungsten, molybdenum, tantalum, niobium and other components can be highly enriched in a primary leaching process, the amount of solution circulation can be reduced for the subsequent rhenium extraction process, the acid concentration is reduced, the corrosion to equipment is reduced, and the cost of the equipment is reduced. More importantly, aluminum and chromium elements in the high temperature alloy are leached in advance to avoid the formation of a passivation film in subsequent sections under the action of strong oxidation; secondly, a rhenium element in primary leaching slag of the high temperature alloy is leached by an ultrasonic enhanced leaching method; and meanwhile, tungsten, molybdenum, tantalum, niobium and other elements are enriched in a secondary leaching process, so that the utilization value of the high temperature alloy scraps is improved, and recycling of all elements and multiple components inthe high temperature alloy is realized.

Description

technical field [0001] The invention relates to the technical field of comprehensive recycling and utilization of superalloy waste, in particular to a method for comprehensive utilization of valuable elements in ultrasonic leaching superalloy waste. Background technique [0002] Superalloys are indispensable and important materials for my country's aerospace engines, electric power, metallurgy, and chemical industries, and are also key materials to ensure the performance of weapons and important civilian equipment. In recent years, with the continuous expansion of the application field of superalloys, the compound annual growth rate of domestic demand is more than 20%, especially the growth demand of superalloys is more significant due to the development of aviation industry. High-temperature alloys contain various rare and precious metal elements such as rhenium, ruthenium, cobalt, nickel, tungsten, molybdenum, niobium, tantalum, and hafnium, and are important secondary res...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B34/24C22B34/32C22B34/34C22B34/36C22B23/00C22B61/00
CPCC22B7/007C22B23/0423C22B23/043C22B23/0438C22B34/24C22B34/32C22B34/34C22B34/36C22B61/00Y02P10/20
Inventor 孙元王龙裴逍遥程陆凡周亦胄
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI