CN108342577A - The green circulatory of failure platinum catalyst utilizes method - Google Patents
The green circulatory of failure platinum catalyst utilizes method Download PDFInfo
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- CN108342577A CN108342577A CN201810189168.XA CN201810189168A CN108342577A CN 108342577 A CN108342577 A CN 108342577A CN 201810189168 A CN201810189168 A CN 201810189168A CN 108342577 A CN108342577 A CN 108342577A
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- electric arc
- platinum
- platinum catalyst
- iron block
- ferroalloy
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/001—Dry processes
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/52—Manufacture of steel in electric furnaces
- C21C5/5264—Manufacture of alloyed steels including ferro-alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B11/00—Obtaining noble metals
- C22B11/02—Obtaining noble metals by dry processes
- C22B11/021—Recovery of noble metals from waste materials
- C22B11/026—Recovery of noble metals from waste materials from spent catalysts
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The present invention relates to failure platinum catalyst secondary resource field of comprehensive utilization, and in particular to the green circulatory for the platinum catalyst that fails utilizes method.The green circulatory of failure platinum catalyst utilizes method, carries out successively as follows：A, material pre-treatment；B, compounding, mixing；C, arc melting；D, ferroalloy powder.Present invention adaptation material range is wide, dissolving carrier effect is good, platinum group metal enrichment times are high, be enriched with content height in platinum group metal in slag, platinum group metal recycling is high, equipment corrosion is low.The noble metal rate of recovery is high, adaptable to material, reduces the dosage of auxiliary material, energy-saving；Production cost is low.
Description
Technical field
The present invention relates to failure platinum catalyst secondary resource field of comprehensive utilization, and in particular to the green for the platinum catalyst that fails
Circulation utilization method.
Background technology
Propylene is production polypropylene, oxidation of propane object（Acetone, propylene oxide and acrylic acid etc.）With importantization of acrylonitrile
Work raw material is the intermediate for the second largest important petrochemical materials for being only second to ethylene.Production propylene mainly has 3 kinds of sides at present
Method：Naphtha pyrolysis propylene simultaneously, catalytic cracking by-product propylene and preparing propylene by dehydrogenating propane.Preparing propylene by dehydrogenating propane price
Cheap alkane is raw material, and platinum group or chromium system are catalyst, and wherein platinum group catalyst is that preparing propylene by dehydrogenating propane mainly synthesizes work
Skill.Dehydrogenating propane platinum catalyst using the coking of process carbon deposit, graphitization, platinum is grained sintered grows up, influence catalyst performance and
It selectively fails, it is necessary to which the catalyst more renewed, spent catalyst platinum Huge value need to recycle.
Alcohol fuel is added in gasoline as oxygenation agent as a kind of purge fuel, high oxygen content, gasoline can be helped complete
Burning, reduces the discharge of the middle harmful substance of vehicle exhaust, obvious environment benefit.As China constantly increases energy consumption demand
Add, the demand to alcohol fuel will improve, and fuel ethanol industrial meets National Security Strategy, have preferable economic and society's effect
Benefit has a extensive future.Alcohol fuel is mainly obtained with sugarcane, grain by the processes such as fermenting, detaching in the world at present.China is
The security relationship of populous nation, grain national economy, and new alcohol fuel synthetic technology meets national strategy safety, China's second
Sour excess capacity, the utilization of capacity are boundless using acetic acid hydrogenation ethyl alcohol foreground from the practical national conditions in China less than 60%.
Catalyst for preparing propylene with propane dehydrogenation is coccoid, and diameter 1-2mm, active component is platinum, and content is in 1000-3000
G ton, auxiliary agent are tin, and carrier is α-Al2O3.Acetic acid alcohol catalysis agent is cylinder strip, diameter 2mm, high 3-5mm, activity
Group is divided into platinum, and for content in 5000-8000 g tons, auxiliary agent is tin, and carrier is silica, graphite, calcium silicate mixture.
Preparing propylene by dehydrogenating propane platinum catalyst and acetic acid hydrogenation ethyl alcohol platinum catalyst are a kind of new catalyst, and failure is urged
The value of agent is big, and the documents and materials of this 2 kinds of spent catalyst recycling platinum are considerably less.Laboratory wet process filtration hardly possible, effect
Difference is low with the platinum rate of recovery.
Invention content
It is an object of the invention to overcome the deficiency of the above-mentioned prior art, trapping technique is smelted iron using electric arc furnaces high temperature melting,
Realize that the green circulatory of platinum utilizes method from failure platinum catalyst, this method adaptation material range is wide, dissolving carrier effect is good,
Platinum group metal enrichment times are high, it is high to be enriched with platinum group metal content in slag, platinum group metal recycling is high, equipment corrosion is low.Noble metal returns
High income, it is adaptable to material, the dosage of auxiliary material is reduced, it is energy-saving；Production cost is low.
To achieve the goals above, the technical scheme is that：
The green circulatory of failure platinum catalyst utilizes method, carries out successively as follows：
A, material pre-treatment：
To fail preparing propylene by dehydrogenating propane platinum catalyst rotary kiln baking, 700-800 DEG C of temperature, rate of roasting 1000-1500
Kg/day；
By fail acetic acid ethyl alcohol platinum catalyst rotary kiln baking, 500-600 DEG C of temperature, 3000-5000 kilograms of rate of roasting/
It；
Marble：Bulk composition is CaCO3, it is crushed to 3-6cm；
Iron block：Bulk, length are less than 10cm；
B, compounding, mixing：
Processed material in step A is pressed into the mass fraction dispensing, 100 mass of failure preparing propylene by dehydrogenating propane platinum catalyst
Part, fail acetic acid ethyl alcohol platinum catalyst 100-120 mass parts, marble 140-160 mass parts, iron block 14-16 mass parts；It removes
Iron block is directly added into the molten bath in electric arc furnaces inside and outside, and other materials are put into taper blender and mix, and rotating speed controls 5-10 revs/min
Clock mixes 30-60 minutes；The material mixed is fitted into feed hopper, the vibration of feed hopper and electric arc furnaces is then fed into system
System connects；
C, arc melting：
Iron block is added into the molten bath of direct current electric arc furnace from feed inlet, power supply is opened, when electric arc in-furnace temperature rises to 1350-1550
Within the scope of DEG C, start vibration charging, 500-700 kgs/hour of charging rate, each melting of electric arc furnaces handles 3-6 tons of materials；Electricity
There are one floss holes for arc stove；After vibration charging is complete, continue heat preservation 60-90 minutes at 1350-1550 DEG C, closes power supply, the row of opening
Mouth is put, slag puts cinder ladle into, takes a slag specimen product, analyzes the content of platinum in slag, after waiting slags to discharge, tilts electric arc furnace body, iron is closed
Metallographic is put into ladle, cooling；
D, ferroalloy powder：
Ferroalloy is mutually melted with intermediate frequency furnace, water quenching powder, particle size range 0.59-0.147mm is dried, weighs, mixed, takes
Sample analyzes platinum content in ferroalloy powder, calculates the metal balance of platinum.
Preferably, fail platinum catalyst green circulatory utilize method, carry out successively as follows：
A, material pre-treatment：
To fail preparing propylene by dehydrogenating propane platinum catalyst rotary kiln baking, 750 DEG C of temperature, 1250 kg/day of rate of roasting；
By the acetic acid ethyl alcohol platinum catalyst rotary kiln baking that fails, 550 DEG C of temperature, 4000 kg/day of rate of roasting；
Marble：Bulk composition is CaCO3, it is crushed to 3-6cm；
Iron block：Bulk, length are less than 10cm；
B, compounding, mixing：
Processed material in step A is pressed into the mass fraction dispensing, 100 mass of failure preparing propylene by dehydrogenating propane platinum catalyst
Part, 110 mass parts of failure acetic acid ethyl alcohol platinum catalyst, 150 mass parts of marble, 15 mass parts of iron block；Except iron block directly adds
Enter molten bath in electric arc furnaces inside and outside, other materials are put into taper blender and mix, and rotating speed controls 8 revs/min, mix 45 points
Clock；The material mixed is fitted into feed hopper, is then connected the vibration feed system of feed hopper and electric arc furnaces；
C, arc melting：
It is added iron block into the molten bath of direct current electric arc furnace from feed inlet, opens power supply, when electric arc in-furnace temperature rises to 1450 DEG C, opens
Begin to vibrate charging, 600 kgs/hour of charging rate, each melting of electric arc furnaces handles 4.5 tons of materials；There are one discharges for electric arc furnaces
Mouthful；After vibration charging is complete, continue heat preservation 75 minutes at 1450 DEG C, close power supply, open floss hole, slag puts cinder ladle into, takes one
Slag specimen product analyze the content of platinum in slag, after waiting slags to discharge, tilt electric arc furnace body, ferroalloy is mutually put into ladle, cooling；
D, ferroalloy powder：
Ferroalloy is mutually melted with intermediate frequency furnace, water quenching powder, particle size range 0.59-0.147mm is dried, weighs, mixed, takes
Sample analyzes platinum content in ferroalloy powder, calculates the metal balance of platinum.
Beneficial effects of the present invention：
1, the noble metal rate of recovery of the present invention is high, is more than 99%；It is adaptable to material；Deactivated catalyst agent carrier cooperates with melting, can subtract
The dosage of few auxiliary material, it is energy-saving；Production cost is low.
2, mutual when the carrier melting of present invention failure catalyst for preparing propylene with propane dehydrogenation and failure acetic acid alcohol catalysis agent
It for auxiliary material, is complementary to one another, is recycled 2 this spent catalysts jointly using electric arc furnaces high temperature melting ironmaking trapping technique, carrier association
Same melting reduces the dosage of auxiliary material, energy-saving, reduction production cost and the rate of recovery for improving platinum, realization failure platinum catalyst
Green circulatory utilize.
3, in fusion process of the present invention, platinum enters ferroalloy phase by iron trapping, and ferroalloy is larger compared to weight, settles electric arc furnaces
Molten bath bottom, slag phase light specific gravity float on electric arc furnaces molten bath top.
4, metallurgical slag of the present invention is inertia slag, nontoxic, is used as aggregate in building industry, the auxiliary material built highway.
5, production process of the present invention cleaning, it is energy saving, at low cost with it is environmental-friendly, reach the green circulatory utilization of country's encouragement
It is required that.
Specific embodiment
Embodiment 1
The green circulatory of failure platinum catalyst utilizes method, carries out successively as follows：
A, material pre-treatment：
To fail preparing propylene by dehydrogenating propane platinum catalyst rotary kiln baking, 700 DEG C of temperature, 1000 kg/day of rate of roasting, roasting
After burning, sampling analysis, 2550 g ton of platinum content；
By the acetic acid ethyl alcohol platinum catalyst rotary kiln baking that fails, 500 DEG C of temperature, 3000 kg/day of rate of roasting, roasting
Afterwards, sampling analysis, 7140 g ton of platinum content；
Marble：Bulk composition is CaCO3, it is crushed to 3-6cm；
Iron block：Bulk, length are less than 10cm；
B, compounding, mixing：
By processed material in step A：Fail 1000 kilograms of preparing propylene by dehydrogenating propane platinum catalyst, and fail acetic acid ethyl alcohol
1000 kilograms of platinum catalyst, 1400 kilograms of marble, 140 kilograms of iron block；Except iron block is directly added into the molten bath in electric arc furnaces
Outside, other materials are put into taper blender and mix, and rotating speed controls 5 revs/min, mix 60 minutes；The material mixed is filled
Enter in feed hopper, then connects the vibration feed system of feed hopper and electric arc furnaces；
C, arc melting：
It is added iron block into the molten bath of direct current electric arc furnace from feed inlet, opens power supply, when electric arc in-furnace temperature rises to 1350 DEG C, opens
Begin to vibrate charging, 500 kgs/hour of charging rate, each melting of electric arc furnaces handles 3 tons of materials；There are one floss holes for electric arc furnaces；
After vibration charging is complete, continue heat preservation 60 minutes at 1350 DEG C, close power supply, open floss hole, slag puts cinder ladle into, takes a slag specimen
Product, the content for analyzing platinum in slag is 19 g tons, after waiting slags to discharge, tilts electric arc furnace body, ferroalloy is mutually put into ladle, cooling；
D, ferroalloy powder：
Ferroalloy is mutually melted with intermediate frequency furnace, water quenching powder, particle size range 0.59-0.147mm is dried, weighs, mixed, iron
139 kilograms of the weight of alloyed powder, in sampling analysis ferroalloy powder, platinum content 6.91%, the rate of recovery of platinum is 99.12%.
Embodiment 2
The green circulatory of failure platinum catalyst utilizes method, carries out successively as follows：
A, material pre-treatment：
To fail preparing propylene by dehydrogenating propane platinum catalyst rotary kiln baking, 750 DEG C of temperature, 1250 kg/day of rate of roasting, roasting
After burning, sampling analysis, 2560 g ton of platinum content；
By the acetic acid ethyl alcohol platinum catalyst rotary kiln baking that fails, 550 DEG C of temperature, 4000 kg/day of rate of roasting, roasting
Afterwards, sampling analysis, 7150 g ton of platinum content；
Marble：Bulk composition is CaCO3, it is crushed to 3-6cm；
Iron block：Bulk, length are less than 10cm；
B, compounding, mixing：
By processed material in step A：Fail 1000 kilograms of preparing propylene by dehydrogenating propane platinum catalyst, and fail acetic acid ethyl alcohol
1100 kilograms of platinum catalyst, 1500 kilograms of marble, 150 kilograms of iron block；Except iron block is directly added into the molten bath in electric arc furnaces
Outside, other materials are put into taper blender and mix, and rotating speed controls 8 revs/min, mix 45 minutes；The material mixed is filled
Enter in feed hopper, then connects the vibration feed system of feed hopper and electric arc furnaces；
C, arc melting：
It is added iron block into the molten bath of direct current electric arc furnace from feed inlet, opens power supply, when electric arc in-furnace temperature rises to 1450 DEG C, opens
Begin to vibrate charging, 600 kgs/hour of charging rate, each melting of electric arc furnaces handles 4.5 tons of materials；There are one discharges for electric arc furnaces
Mouthful；After vibration charging is complete, continue heat preservation 75 minutes at 1450 DEG C, close power supply, open floss hole, slag puts cinder ladle into, takes one
Slag specimen product, the content for analyzing platinum in slag is 21 g tons, after waiting slags to discharge, tilts electric arc furnace body, ferroalloy is mutually put into ladle,
It is cooling；
D, ferroalloy powder：
Ferroalloy is mutually melted with intermediate frequency furnace, water quenching powder, particle size range 0.59-0.147mm is dried, weighs, mixed, iron
147 kilograms of the weight of alloyed powder, in sampling analysis ferroalloy powder, platinum content 7.04%, the rate of recovery of platinum is 99.27%.
Embodiment 3
The green circulatory of failure platinum catalyst utilizes method, carries out successively as follows：
A, material pre-treatment：
To fail preparing propylene by dehydrogenating propane platinum catalyst rotary kiln baking, 800 DEG C of temperature, 1500 kg/day of rate of roasting, roasting
After burning, sampling analysis, 2570 g ton of platinum content；
By the acetic acid ethyl alcohol platinum catalyst rotary kiln baking that fails, 600 DEG C of temperature, 5000 kg/day of rate of roasting, roasting
Afterwards, sampling analysis, 7160 g ton of platinum content；
Marble：Bulk composition is CaCO3, it is crushed to 3-6cm；
Iron block：Bulk, length are less than 10cm；
B, compounding, mixing：
By processed material in step A：Fail 1000 kilograms of preparing propylene by dehydrogenating propane platinum catalyst, and fail acetic acid ethyl alcohol
1200 kilograms of platinum catalyst, 1600 kilograms of marble, 160 kilograms of iron block；Except iron block is directly added into the molten bath in electric arc furnaces
Outside, other materials are put into taper blender and mix, and rotating speed controls 10 revs/min, mix 30 minutes；The material mixed is filled
Enter in feed hopper, then connects the vibration feed system of feed hopper and electric arc furnaces；
C, arc melting：
It is added iron block into the molten bath of direct current electric arc furnace from feed inlet, opens power supply, when electric arc in-furnace temperature rises to 1550 DEG C, opens
Begin to vibrate charging, 700 kgs/hour of charging rate, each melting of electric arc furnaces handles 6 tons of materials；There are one floss holes for electric arc furnaces；
After vibration charging is complete, continue heat preservation 90 minutes at 1550 DEG C, close power supply, open floss hole, slag puts cinder ladle into, takes a slag specimen
Product, the content for analyzing platinum in slag is 19 g tons, after waiting slags to discharge, tilts electric arc furnace body, ferroalloy is mutually put into ladle, cooling；
D, ferroalloy powder：
Ferroalloy is mutually melted with intermediate frequency furnace, water quenching powder, particle size range 0.59-0.147mm is dried, weighs, mixed, iron
154 kilograms of the weight of alloyed powder, in sampling analysis ferroalloy powder, platinum content be 7.2 %, the rate of recovery of platinum is 99.34 %.
Claims (2)
1. the green circulatory for the platinum catalyst that fails utilizes method, which is characterized in that carry out successively as follows：
A, material pre-treatment：
To fail preparing propylene by dehydrogenating propane platinum catalyst rotary kiln baking, 700-800 DEG C of temperature, rate of roasting 1000-1500
Kg/day；
By fail acetic acid ethyl alcohol platinum catalyst rotary kiln baking, 500-600 DEG C of temperature, 3000-5000 kilograms of rate of roasting/
It；
Marble：Bulk composition is CaCO3, it is crushed to 3-6cm；
Iron block：Bulk, length are less than 10cm；
B, compounding, mixing：
Processed material in step A is pressed into the mass fraction dispensing, 100 mass of failure preparing propylene by dehydrogenating propane platinum catalyst
Part, fail acetic acid ethyl alcohol platinum catalyst 100-120 mass parts, marble 140-160 mass parts, iron block 14-16 mass parts；It removes
Iron block is directly added into the molten bath in electric arc furnaces inside and outside, and other materials are put into taper blender and mix, and rotating speed controls 5-10 revs/min
Clock mixes 30-60 minutes；The material mixed is fitted into feed hopper, the vibration of feed hopper and electric arc furnaces is then fed into system
System connects；
C, arc melting：
Iron block is added into the molten bath of direct current electric arc furnace from feed inlet, power supply is opened, when electric arc in-furnace temperature rises to 1350-1550
Within the scope of DEG C, start vibration charging, 500-700 kgs/hour of charging rate, each melting of electric arc furnaces handles 3-6 tons of materials；Electricity
There are one floss holes for arc stove；After vibration charging is complete, continue heat preservation 60-90 minutes at 1350-1550 DEG C, closes power supply, the row of opening
Mouth is put, slag puts cinder ladle into, takes a slag specimen product, analyzes the content of platinum in slag, after waiting slags to discharge, tilts electric arc furnace body, iron is closed
Metallographic is put into ladle, cooling；
D, ferroalloy powder：
Ferroalloy is mutually melted with intermediate frequency furnace, water quenching powder, particle size range 0.59-0.147mm is dried, weighs, mixed, takes
Sample analyzes platinum content in ferroalloy powder, calculates the metal balance of platinum.
2. the green circulatory of failure platinum catalyst according to claim 1 utilizes method, which is characterized in that
A, material pre-treatment：
To fail preparing propylene by dehydrogenating propane platinum catalyst rotary kiln baking, 750 DEG C of temperature, 1250 kg/day of rate of roasting；
By the acetic acid ethyl alcohol platinum catalyst rotary kiln baking that fails, 550 DEG C of temperature, 4000 kg/day of rate of roasting；
Marble：Bulk composition is CaCO3, it is crushed to 3-6cm；
Iron block：Bulk, length are less than 10cm；
B, compounding, mixing：
Processed material in step A is pressed into the mass fraction dispensing, 100 mass of failure preparing propylene by dehydrogenating propane platinum catalyst
Part, 110 mass parts of failure acetic acid ethyl alcohol platinum catalyst, 150 mass parts of marble, 15 mass parts of iron block；Except iron block directly adds
Enter molten bath in electric arc furnaces inside and outside, other materials are put into taper blender and mix, and rotating speed controls 8 revs/min, mix 45 points
Clock；The material mixed is fitted into feed hopper, is then connected the vibration feed system of feed hopper and electric arc furnaces；
C, arc melting：
It is added iron block into the molten bath of direct current electric arc furnace from feed inlet, opens power supply, when electric arc in-furnace temperature rises to 1450 DEG C, opens
Begin to vibrate charging, 600 kgs/hour of charging rate, each melting of electric arc furnaces handles 4.5 tons of materials；There are one discharges for electric arc furnaces
Mouthful；After vibration charging is complete, continue heat preservation 75 minutes at 1450 DEG C, close power supply, open floss hole, slag puts cinder ladle into, takes one
Slag specimen product analyze the content of platinum in slag, after waiting slags to discharge, tilt electric arc furnace body, ferroalloy is mutually put into ladle, cooling；
D, ferroalloy powder：
Ferroalloy is mutually melted with intermediate frequency furnace, water quenching powder, particle size range 0.59-0.147mm is dried, weighs, mixed, takes
Sample analyzes platinum content in ferroalloy powder, calculates the metal balance of platinum.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109628752A (en) * | 2019-01-10 | 2019-04-16 | 徐州浩通新材料科技股份有限公司 | The process flow of electric arc furnaces recycling platinum group metal |
| CN115161488A (en) * | 2022-04-25 | 2022-10-11 | 金川集团股份有限公司 | Method for treating complex low-grade platinum-palladium material by using direct-current electric arc furnace |
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| CN104073625A (en) * | 2014-07-14 | 2014-10-01 | 贵研资源（易门）有限公司 | Pretreatment method before enriching and recycling precious of metal in plasma smelting |
| CN105886770A (en) * | 2015-01-26 | 2016-08-24 | 昆明冶金高等专科学校 | Efficient enrichment method for precious metal secondary resources |
| CN105886771A (en) * | 2015-01-26 | 2016-08-24 | 昆明冶金高等专科学校 | Method for efficiently collecting platinum group metals through mixing reduction smelting of iron powder and iron ores |
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| JP2009155677A (en) * | 2007-12-25 | 2009-07-16 | Mitsubishi Materials Corp | Method for recovering noble metal, and recovered noble metal |
| CN104073641A (en) * | 2014-07-14 | 2014-10-01 | 贵研资源（易门）有限公司 | Method for recovering noble metals from spent auto-catalyst |
| CN104073625A (en) * | 2014-07-14 | 2014-10-01 | 贵研资源（易门）有限公司 | Pretreatment method before enriching and recycling precious of metal in plasma smelting |
| CN105886770A (en) * | 2015-01-26 | 2016-08-24 | 昆明冶金高等专科学校 | Efficient enrichment method for precious metal secondary resources |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109628752A (en) * | 2019-01-10 | 2019-04-16 | 徐州浩通新材料科技股份有限公司 | The process flow of electric arc furnaces recycling platinum group metal |
| CN115161488A (en) * | 2022-04-25 | 2022-10-11 | 金川集团股份有限公司 | Method for treating complex low-grade platinum-palladium material by using direct-current electric arc furnace |
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| CN108342577B (en) | 2019-10-15 |
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