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

A method for recovering valuable metals from waste mobile phones

A valuable metal and mobile phone technology, which is applied in the field of valuable metal extraction from waste mobile phones, can solve the problems of increasing slag metal loss, energy consumption, disadvantages, etc., to avoid manual dismantling process, reduce temperature and energy consumption, Significant effect of comprehensive economic benefits

Active Publication Date: 2018-10-26
CHANGSHA RES INST OF MINING & METALLURGY
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is not only detrimental to gold, silver, rare earth (Re 2 o 3 ) and other recycling, and the smelting process needs to add a large amount of slagging agent, which increases the metal loss and energy consumption taken away by the slag

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
  • A method for recovering valuable metals from waste mobile phones

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A method for recovering valuable metals from waste mobile phones of the present invention comprises the following steps:

[0035] Waste mobile phone materials (Cu23%, Au 315g / t, Ag3515g / t, Pt6.8g / t, Pd147g / t, Ni1.2%, Fe 5%, Al 2 o 3 4%, SiO 2 10%, CaO 3%wt%; wherein the quality of mobile phone screen accounts for 5% of the total mass of waste mobile phone materials, and the mass ratio of mobile phone screen to mobile phone circuit board is 1:7). After mixing evenly, put it into the smelting furnace for high-temperature smelting, and feed an appropriate amount of oxygen into the smelting furnace, control the smelting temperature at 1425°C, and smelting time for 15 minutes to produce Cu alloy and CaO-FeO-SiO 2 -Al 2 o 3 -Na 2 O-K 2 O-Re 2 o 3 Seven element slag;

[0036] The contents of Cu, Au, Ag, Pt, and Pd in ​​the alloy produced by smelting are 83.46%, 1089.00g / t, 13100.00g / t, 12.05g / t, and 533.00g / t respectively, and the content of Fe is only 2.13%; the outp...

Embodiment 2

[0038] A method for recovering valuable metals from waste mobile phones of the present invention comprises the following steps:

[0039] Waste mobile phone materials (Cu23%, Au 315g / t, Ag3515g / t, Pt 6.8g / t, Pd147g / t, Ni1.2%, Fe 5%, Al 2 o 3 4%, SiO 2 10%, CaO 3%wt%; wherein the quality of mobile phone screens accounts for 5% of the total mass of waste mobile phone materials, and the mass ratio of mobile phone screens to mobile phone circuit boards is 1: 7) using high-speed shearing crushers to crush materials with a particle size of 80mm, Mixing with the CaO-containing material to obtain a mixed material, wherein the CaO-containing material is limestone, accounting for 10% of the mass of the mixed material. Put the mixed material into the smelting furnace for high-temperature smelting, and feed an appropriate amount of oxygen into the smelting furnace, control the smelting temperature at 1325°C, and smelting time for 60 minutes to produce Cu alloy and CaO-FeO-SiO 2 -Al 2...

Embodiment 3

[0042] A method for recovering valuable metals from waste mobile phones of the present invention, the process flow is as follows figure 1 shown, including the following steps:

[0043] Waste mobile phone materials (Cu11.55%, Au97.13g / t, Ag550.37g / t, Pt0.21g / t, Pd5.79g / t, Ni0.91%, Fe10.71%, Al 2 o 3 5.31%, SiO 2 15.85%, CaO 2.26%wt%; wherein the quality of mobile phone screens accounts for 20% of the total mass of waste mobile phone materials, and the mass ratio of mobile phone screens to mobile phone circuit boards is 1:2) using high-speed shear crushers to crush materials with a particle size of 10mm, A dry-type weak magnetic separator with a magnetic separation field strength of 0.8T is used to remove ferrous metals. The removal rate of iron is 90%, and the Fe content in the material after iron removal is only 1.25%. The material after magnetic separation is mixed with the CaO-containing material to obtain a mixed material, wherein the CaO-containing material is a mixtu...

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 provides a method for recycling valuable metals from waste mobile phones. The method comprises the following steps: (1) crushing waste mobile phone materials without batteries; and (2) evenly mixing the crushed materials, feeding the mixed materials in a smelting furnace, and smelting the materials at high temperature to produce Cu alloy and CaO-FeO-SiO2-Al2O3-Na2O-K2O-Re2O3 seven-element system slag. According to components in the slag by mass, CaO / SiO2 is equal to 0.15-1.10, Fe / SiO2 is smaller than or equal to 1.5, the content of Al2O3 is smaller than or equal to 15.0%, and the total content of Na2O-K2O-Re2O3 three-element slag is greater than or equal to 3.0%; and according to components in the Cu alloy by mass, the content of Fe is smaller than or equal to 15%. According to the method, a smelting process can be implemented by simple crushing and magnetic separation only, the slag which is rich in precious metal alloys and rare earth is obtained, the technological process is shortened, and furthermore, the economic benefit, the social benefit and the environmental benefit are remarkable.

Description

technical field [0001] The invention belongs to the field of resource recovery and recycling, in particular to a method for extracting valuable metals from waste mobile phones. Background technique [0002] With the rapid development of the mobile phone industry, mobile phone shipments have surged. In 2014, my country's mobile phone shipments have exceeded 1 billion; on the other hand, mobile phone users cover a wide range. The number of telephone users is 1.304 billion, covering almost the entire population of the country; about 50% of mobile phone users change their phones within 18 months, and 20% of users must change their phones within one year. There are many mobile phone users, the replacement of mobile phones is fast, and the replacement speed of mobile phone users is fast. The emergence of a large number of waste mobile phones has become inevitable. According to data from the Ministry of Industry and Information Technology, 425 million mobile phones were sold in my ...

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 Patents(China)
IPC IPC(8): C22B7/00C22B15/00C22B11/02C22B59/00
CPCC22B7/001C22B11/025C22B15/0028C22B59/00Y02P10/20
Inventor 肖骁任国兴潘炳黄礼龙石立龙渊赵卫夺刘瑜李文明
Owner CHANGSHA RES INST OF MINING & METALLURGY