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

A Method for Separating PGMs from Fe-PGMS Alloys

A fe-pgms, zn-fe-pgms technology, applied in the field of separation of PGMs, can solve the problems of high material consumption, low recovery of PGMs, long time consumption, etc., and achieve the effect of efficient separation

Active Publication Date: 2021-04-09
UNIV OF SCI & TECH BEIJING
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems of high material consumption, long time consumption, and low recovery of PGMs in the dissolution of Fe-PGMs alloy in the prior art, the present invention discloses a method for separating PGMs from Fe-PGMs alloy, which can reduce the amount of crushing agent used, reduce acid consumption, shorten acid hydrolysis time, improve PGMs recovery rate and production efficiency

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 Separating PGMs from Fe-PGMS Alloys

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032]The Fe-PGMs alloy with a mass ratio of 1:1 was smelted with Zn at 1100°C for 3 hours to produce a Zn-Fe-PGMs alloy, and the Zn-Fe-PGMs alloy was crushed to a particle size of 2.75 cm, and the crushed Zn-Fe- PGMs small alloy particles were oxidized at 400℃ for 4h to obtain a mixture of zinc-iron oxides and PGMs. The mixture of zinc-iron oxides and PGMs was placed in hydrochloric acid with a hydrogen ion concentration of 0.5 mol / L and a solid-to-liquid ratio of 1:4 to react at 85°C for 0.5 h, and the acid solution and platinum group metal precipitation were obtained by filtration. Use 4mol / L ammonia water to neutralize the acid solution, and filter to obtain Fe(OH) 3 Precipitation and zinc ammonia complex solution. Zinc is extracted by zinc-ammonia complex solution electrowinning, the electrowinning conditions are: cell voltage 2.5V, current density 300A / m 2 , the electrolysis temperature is 40°C, the cathode zinc is obtained, and the electrowinning tail liquid is return...

Embodiment 2

[0034] The Fe-PGMs alloy with a mass ratio of 1:1.5 was melted with Zn at 1150°C for 2.5h to produce a Zn-Fe-PGMs alloy, and the Zn-Fe-PGMs alloy was crushed to a particle size of 2.5 cm, and the crushed Zn-Fe -PGMs small alloy particles were oxidized at 450°C for 3.5 hours to obtain a mixture of zinc-iron oxides and PGMs. The mixture of zinc-iron oxides and PGMs was placed in hydrochloric acid with a hydrogen ion concentration of 1 mol / L and a solid-to-liquid ratio of 1:4.5 to react at 70°C for 1 h, and the acid solution and platinum group metal precipitation were obtained by filtration. Use 5mol / L ammonia water to neutralize the acid solution, and filter to obtain Fe(OH) 3 Precipitation and zinc ammonia complex solution. Zinc is extracted by zinc-ammonia complex solution electrowinning, the electrowinning conditions are: cell voltage 2.6V, current density 350A / m 2 , the electrolysis temperature is 45°C to obtain cathode zinc, and the electrowinning tail liquid returns to a...

Embodiment 3

[0036] The Fe-PGMs alloy with a mass ratio of 1:2 and Zn were smelted at 1200 °C for 2 hours to make a Zn-Fe-PGMs alloy, and the Zn-Fe-PGMs alloy was crushed to a particle size of 2.25 cm, and the crushed Zn-Fe- PGMs small alloy particles were oxidized at 500℃ for 3h to obtain a mixture of zinc-iron oxides and PGMs. The mixture of zinc-iron oxides and PGMs was placed in hydrochloric acid with a hydrogen ion concentration of 2 mol / L and a solid-to-liquid ratio of 1:5 to react at 65°C for 1.5 h, and the acid hydrolyzed solution and platinum group metal precipitates were obtained by filtration. Use 6mol / L ammonia water to neutralize the acid solution, and filter to obtain Fe(OH) 3 Precipitation and zinc ammonia complex solution. Zinc extraction by zinc ammonia complex solution electrowinning, electrowinning conditions: cell voltage 2.7V, current density 400A / m 2 , the electrolysis temperature is 50°C to obtain cathode zinc, and the electrowinning tail liquid returns to acidolys...

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

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for separating PGMs from Fe-PGMs alloy, which belongs to the metallurgical field of platinum group metals (PGMs for short). In the method, Zn and Fe-PGMs alloys are melted to form brittle Zn-Fe-PGMs alloys, and then crushed, oxidized, and acidolyzed to realize the separation of PGMs. The invention has the advantages of high separation rate of PGMs, short process, simple process, no heavy metal pollution and easy industrialization.

Description

technical field [0001] The invention belongs to the field of metallurgy of platinum group metals, in particular to a method for separating PGMs from Fe-PGMs alloys. Background technique [0002] Platinum Group Metals (PGMs for short) have the characteristics of high melting point, corrosion resistance, and good catalytic activity. They are widely used in catalysis, national defense and military industries, etc., and are strategic metals. my country's proven PGMs mineral resources are very few and of low grade, but the demand is huge and the contradiction between supply and demand is sharp. Recovering PGMs from PGMs secondary resources is an important measure to alleviate the contradiction between supply and demand. Fe-PGMs alloy is the product of iron-captured PGMs secondary resources, which has the characteristics of high hardness, hard to break, containing a certain amount of C and P impurities, and difficult acid hydrolysis. At present, the methods for separating PGMs f...

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): C22B7/00C22B1/00C22B11/00C22B19/20C25C1/16
CPCC22B1/00C22B7/001C22B7/007C22B11/04C22B19/20C25C1/16Y02P10/20
Inventor 张深根丁云集崔言杰
Owner UNIV OF SCI & TECH BEIJING