Synergetic metal recycling method for nickel and cobalt containing waste batteries and copper containing electronic waste

A technology of electronic waste and waste batteries, applied in battery recycling, waste collector recycling, recycling technology, etc., can solve the problems of low wet leaching efficiency, accompanying waste liquid generation, secondary pollution, etc., and achieve large market promotion Prospect, high efficiency, low impurity content effect

Inactive Publication Date: 2017-08-04
SINO SCI PROCESS BEIJING SCI&TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This technology uses pyrotronucleation (pyrotechnology) techniques that produce pure or very few types of valuable materials from various sources such as spent battery residue, electronics scrapings containing these substances, etc., without requiring expensive methods like acid digestion or solvent extraction processes. Additionally, this technique allows for efficient production of highly purified metals by concentrating certain important components within specific areas inside the material before processing them outside. Overall, this new approach provides technical benefits over existing technologies including lower costs associated with traditional mineral separation procedures and improved environmental impact compared to current options.

Problems solved by technology

This patented technical problem addressed in this patents relates to finding ways to efficiently reuse used (waste) electric vehicle batteries without causing negative impacts upon their owners' health and wellness issues during disposal. Current solutions involve either incinerating them after use or utilizing different types of chemical agents like hydrogen peroxides/acids. However these approaches may result in harmful emissions due to combustible gases released when they break down intoxic gas. Additionally, existing cleanup procedures require expensive equipment and consume significant amounts of water resources.

Method used

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  • Synergetic metal recycling method for nickel and cobalt containing waste batteries and copper containing electronic waste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The waste nickel-cobalt batteries were crushed into 5~15mm×5~15mm fragments, and gravity separation was carried out to obtain 1kg of nickel- and cobalt-enriched materials, which were mixed with 2kg of copper-containing electronic waste. Put the mixture into a graphite crucible and heat it to 1100°C in an induction furnace. After the temperature stabilizes, add 200g of calcium-aluminum-silicon slagging agent and 20g of activated carbon mixed agent, in which CaO:Al 2 o 3 : SiO 2The mass ratio is 40:30:30. The smelting time is 1 hour, supplemented by mechanical, gas or electromagnetic stirring to assist iron and aluminum elements to enter the slag phase and remove harmful impurities. After smelting, the crucible is cooled to room temperature, and metals containing copper, nickel, and cobalt are obtained by mechanical separation. The resulting metals are cut into thin slices and subjected to electrolytic refining to obtain high-purity copper, nickel, and cobalt metals re...

Embodiment 2

[0045] The nickel-cobalt-lithium-aluminate ternary lithium battery was broken into 5~15mm×5~15mm fragments, and gravity sorting was carried out to obtain 2kg of nickel and cobalt-enriched materials, which were mixed with 5kg of copper-containing electronic waste. Put the mixture into a graphite crucible and heat it to 1200°C in an induction furnace. After the temperature stabilizes, add 200g of calcium-aluminum-silicon slagging agent and 60g of activated carbon mixed agent, in which CaO: Al 2 o 3 : SiO 2 The mass ratio is 60: 25: 25. The smelting time is 1 hour, supplemented by mechanical, gas or electromagnetic stirring to increase iron and aluminum elements into the slag phase and remove harmful impurities. Remove slag at high temperature to obtain metals containing copper, nickel and cobalt. The resulting metals are cut into thin slices and subjected to electrolytic refining to obtain high-purity copper, nickel, and cobalt metals.

Embodiment 3

[0047] The nickel-cobalt lithium manganese oxide ternary lithium battery was broken into 5~15mm×5~15mm fragments, and gravity separation was carried out to obtain 2kg of nickel and cobalt-enriched materials, which were mixed with 2kg of copper-containing electronic waste. Put the mixture into a graphite crucible and heat it to 950°C in an induction furnace. After the temperature stabilizes, add 200g of calcium-aluminum-silicon slagging agent and 60g of activated carbon mixture, in which CaO:Al 2 o 3 : SiO 2 The mass ratio is 60: 20: 20. The smelting time is 1 hour, supplemented by mechanical stirring to increase iron and aluminum elements into the slag phase and remove harmful impurities. After smelting, the crucible is cooled to room temperature, and metals containing copper, nickel, and cobalt are obtained by mechanical separation. The resulting metals are cut into thin slices and subjected to electrolytic refining to obtain high-purity copper, nickel, and cobalt metals. ...

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Abstract

The invention provides a synergetic metal recycling method for nickel and cobalt containing waste batteries and copper containing electronic waste. The preliminarily smashed and metal element enriched waste batteries and the copper containing electronic waste are mixed, and a slag former and a reducing agent in a certain ratio are blended for an oxidative reducing reaction; relatively active metal iron, aluminum and the like in the reaction process form oxide to enter an upper layer slag phase; metal cobalt and nickel enter copper liquid on the bottom layer, and therefore the metal phase and a slag phase are separated, and metal containing copper, cobalt and nickel is obtained; and copper, cobalt, nickel and other high-purity metal are recycled through electrorefining. The method is short in flow, high-temperature thermometallurgy is adopted for synergetically recycling the valuable metal in the batteries and the electronic waste, and the problems that traditional waste battery wet recycling efficiency is low, the environment is polluted, a large amount of lixivium needs to be used, and a large amount of acid and alkaline is consumed are avoided; and an efficient novel recycling way is provided for waste ternary battery and electronic waste resource recycling, and good industrial application prospects are achieved.

Description

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Claims

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Application Information

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Owner SINO SCI PROCESS BEIJING SCI&TECH CO LTD
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