Method for concentrating and recovering noble metals from printed circuit boards of discarded mobile phones and catalysts of discarded cars using discarded nonferrous slag
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
However, this method has the disadvantage of requiring a large amount of metals such as copper, nickel, iron or nickel for trapping noble metals, various fluxes such as alumina (Al 2 o 3 ), caustic lime (CaO), magnesium oxide (MgO), iron oxide (FeO) or silicon dioxide (SiO 2 ), and reducing agent carbon, which increases the production cost
In addition, a dedicated furnace-based method that does not use metals such as copper, iron, lead, or nickel for trapping noble metals has a disadvantage in that the alloy phase is difficult to obtain from the residue phase because the amount of the alloy phase obtained in this method is small. Separation in the middle, resulting in increased processing time
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
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0044]The non-ferrous metal waste slag and the discarded automobile catalyst are respectively crushed into small particles with a diameter of 0.5-1.0cm. The non-ferrous slag thus crushed is then mixed with caustic lime (CaO), which is a flux as an agent for controlling the composition of the slag. The amount based on 100 parts by weight of non-ferrous metal waste slag was uniformly mixed with 40 parts by weight of caustic lime (CaO) using a V-type mixer (Hanyang Science, Korea), and the mixture was charged into an electric furnace, followed by melting at 1300 °C 20 minutes to obtain a melt. A discarded mobile phone PCB and a crushed discarded auto catalyst were added to the melt thus obtained, followed by melting at 1450° C. for 20 minutes to obtain a melt. At this time, the amount of discarded mobile phone PCBs loaded was 67 parts by weight based on 100 parts by weight of nonferrous metal slag, and the amount of discarded automobile catalyst was 20 parts by weight based on 1...
Embodiment 2
[0047] The non-ferrous metal waste slag and the discarded automobile catalyst are respectively crushed into small particles with a diameter of 0.5-1.0cm. The non-ferrous slag thus crushed is then mixed with caustic lime (CaO), which is a flux as an agent for controlling the composition of the slag. Using a V-type mixer (Hanyang Science, Korea), the amount of caustic lime (CaO) was uniformly mixed with 5 parts by weight based on 100 parts by weight of non-ferrous metal waste slag, and the mixture was charged into an electric furnace, followed by melting at 1300 °C 10 minutes to obtain a melt. A discarded mobile phone PCB and a crushed discarded auto catalyst were added to the melt thus obtained, followed by melting at 1300° C. for 40 minutes to obtain a melt. At this time, the amount of waste mobile phone PCB loaded was 50 parts by weight based on 100 parts by weight of nonferrous metal residue, and the amount of discarded automobile catalyst was 15 parts by weight based on 10...
Embodiment 3
[0050] Crush non-ferrous metal waste slag and waste auto catalyst into small particles with a diameter of 1.0-1.5cm and 0.5-1.0cm, respectively. The non-ferrous slag thus crushed is then mixed with caustic lime (CaO), which is a flux as an agent for controlling the composition of the slag. 25 parts by weight of caustic lime (CaO) was uniformly mixed in an amount based on 100 parts by weight of non-ferrous metal waste slag using a V-type mixer (Hanyang Science, Korea), and the mixture was charged into an electric furnace, followed by melting at 1350 °C 15 minutes to obtain a melt. A discarded mobile phone PCB and a crushed discarded auto catalyst were added to the melt thus obtained, followed by melting at 1400° C. for 30 minutes to obtain a melt. At this time, the amount of waste mobile phone PCB loaded was 50 parts by weight based on 100 parts by weight of nonferrous metal waste residue, and the amount of waste automobile catalyst loaded was 25 parts by weight based on 100 p...
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
Property
Measurement
Unit
diameter
aaaaa
aaaaa
diameter
aaaaa
aaaaa
diameter
aaaaa
aaaaa
Login to view more
Abstract
The present invention relates to a method for concentrating and recovering noble metals from printed circuit boards of discarded mobile phones and catalysts of discarded cars using discarded nonferrous slag, which is industrial waste discharged from a process for refining nonferrous metals such as copper, lead, zinc and the like, and more specifically, to a method for concentrating and recovering gold, silver, platinum, palladium, rhodium and the like contained in printed circuit boards of discarded mobile phones and catalysts of discarded cars by melting discarded nonferrous slag, printed circuit boards of discarded mobile phones and catalysts of discarded cars at a high temperature through a single process to reduce and separate iron oxide contained in the discarded nonferrous slag and simultaneously melting and separating copper, iron, tin, and nickel contained in the printed circuit boards of discarded mobile phones to use the generated iron, copper, tin, and nickel alloy as a collector metal for noble metals. The method for concentrating and recovering noble metals from printed circuit boards of discarded mobile phones and catalysts of discarded cars using discarded nonferrous slag of the present invention comprises the steps of: mixing and melting discarded nonferrous slag and a solvent, which is a slag composition controller; inserting printed circuit boards of discarded mobile phones and catalysts of discarded cars to the obtained molten metal to melt the same; and maintaining the same for a predetermined amount of time to separate the same into a noble metal-collected alloy phase and a slag phase containing no noble metals. In addition, the present invention relates to a method for recovering valuable metals such as iron, copper, tin, nickel and the like in addition to noble metals such as gold, silver, platinum, palladium, and rhodium from printed circuit boards of discarded mobile phones and catalysts of discarded cars, and recycling the generated slag without environmental problems. According to the present invention, the amount of the generated alloy phase is increased without using a collector metal for noble metals such as copper, iron, lead, and nickel and carbon as a reducing agent which increase processing costs by using discarded nonferrous slag, which is industrial waste discharged from a process for refining nonferrous metals such as copper, lead, zinc, and the like, as a solvent, which is a slag composition controller, and a noble metal collector simultaneously, and using a plastic component contained in printed circuit boards of discarded mobile phones as a reducing agent, and thus an alloy phase and a slag phase can be readily separated, thereby simultaneously reducing processing time and minimizing the amount of a solvent such as alumina (Al2O3), quicklime (CaO), magnesia (MgO), iron oxide (FeO) and silica (SiO2). Accordingly, noble metals such as gold, silver, platinum, palladium, rhodium and the like can be concentrated and recovered through a single process by simultaneously treating different industrial waste such as printed circuit boards of discarded mobile phones and catalysts of discarded cars, and waste material can be recycled to be used as a material for the high-technology industry, and thus it is possible to maximize the coefficient of utilization of noble metal resources in resource-poor Korea, which depends on imports for all of noble metal resources.
Description
technical field [0001] The present invention relates to the recovery of precious metals from waste mobile phone printed circuit boards (PBC) and waste automobile catalysts, which are used as Raw materials for high-tech products. More particularly, the present invention relates to a method for enriching and recovering precious metals from discarded mobile phone PBC and discarded auto catalysts using non-ferrous metal waste slag, the method comprising adding non-ferrous metals to discarded mobile phone PCBs and discarded auto catalysts Waste slag and caustic lime (CaO) are used as a flux to control the slag composition, followed by melting at high temperature, thereby removing precious metals such as Gold, silver, platinum, palladium and rhodium are captured and enriched in metals such as iron, copper, tin and nickel contained in non-ferrous metal waste slag and discarded mobile phone PCBs, and the captured and enriched precious metals are recovered. In the present invention, ...
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
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more