CN107460338A - A kind of method of fiery wet-process beneficiation low grade noble metal - Google Patents
A kind of method of fiery wet-process beneficiation low grade noble metal Download PDFInfo
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- CN107460338A CN107460338A CN201610384798.3A CN201610384798A CN107460338A CN 107460338 A CN107460338 A CN 107460338A CN 201610384798 A CN201610384798 A CN 201610384798A CN 107460338 A CN107460338 A CN 107460338A
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- noble metal
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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
- C22B11/00—Obtaining noble metals
- C22B11/02—Obtaining noble metals by dry processes
- C22B11/021—Recovery of noble metals from waste materials
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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
- C22B11/00—Obtaining noble metals
- C22B11/04—Obtaining noble metals by wet processes
- C22B11/042—Recovery of noble metals from waste materials
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Abstract
The invention discloses a kind of method of fiery wet-process beneficiation low grade noble metal, by low grade noble metal flue dust and trapping agent reduced iron powder, carborundum powder, slag former, after mixing by a certain percentage, it is placed in micro-wave oven, using reduced iron powder and carborundum powder microwave absorbing property, is rapidly heated under microwave radiation and carries out melting, obtain containing precious metal alloys, dust to obtain iron powder containing noble metal using atomization, using iron in diluted acid Selectively leaching alloy, obtain concentration of precious metal thing.The present invention has the characteristics of technological process is simple, smelting time is short, the noble metal rate of recovery is high.
Description
Technical field
The invention belongs to nonferrous metallurgy field, is related to a kind of method of low grade noble metal feed enrichment, more particularly to
A kind of method of fiery wet-process beneficiation low grade noble metal.
Background technology
Pyrogenic process beneficiation technologies are that noble metal secondary resource material is added into certain trapping agent to carry out high melt, make your gold
Category is trapped in base metal, then is reclaimed with conventional method.For solid waste, pyrogenic process enrichment is by secondary resource material
With trapping agent and slag former mixed smelting；For liquid waste, pyrogenic process enrichment is that trapping agent and waste liquid are bonded into pelletizing, after drying
Carry out melting.Pyrogenic process enrichment is considerably less particularly suitable for processing indissoluble carrier and load platinum group metal content to wide application range of material
Dead catalyst.Pyrogenic process beneficiation technologies are more to make trapping agent with iron, copper, lead, nickel, sulfonium.
Lead traps：Lead is gold, silver and platinum, the good trapping agent of palladium, but is trapped for rare platinum group metal then incomplete.With
Lead makees trapping agent, and equipment is blast furnace or electric furnace, and in reducing atmosphere, lead compound is being reduced to metallic lead, in this process
Middle trapping noble metal, is handled by slag making, realizes that lead bullion separates with slag.Obtain lead bullion selective oxidation in cupel(lation) furnace or converter
Make concentration of precious metal.Or the lead bullion of smelting acquisition need to use electric smelting, respectively obtain lead pig or the earth of positive pole, noble metal richness is realized
Collection, but its process cycle is longer, and lead easily forms oxide volatilization, the very big harm of harm to operating personnel and surrounding enviroment.
In addition, lead is immiscible with rhodium, it is necessary to cooperate with lead to trap rhodium by platinum palladium.Therefore, the rate of recovery that result in rhodium is relatively low.
Copper traps：Make trapping agent with copper, copper trapping platinum group metal is carried out typically in electric arc furnaces, by waste material, copper or its
The oxide and reducing agent of copper carry out reduction melting at high temperature, obtain the copper alloy containing noble metal, are separated with slag.Copper traps platinum
Race's Metal Melting temperature is relatively low for iron, good separating effect, and platinum group metal loss is small in slag, and metallic copper can follow
Ring uses, but the problems such as cycle length and reagent consumption are excessive, loss is big, cost is high be present.
Iron traps：Make trapping agent with iron, its theory is that the elements such as platinum in noble metal, palladium, rhodium, ruthenium, osmium, iridium are close iron,
Just often with iron symbiosis in nature, at high temperature, iron forms continuously solution altogether with these elements, therefore iron has as trapping agent
There is raw material to be easy to get, the features such as arresting efficiency is high, follow-up acidleach enriching noble metals are easier to.
Sulfonium traps：Make trapping agent with sulfonium, in electric furnace melting make sulfonium trapping, concentration ratio is higher, high income, acquisition containing expensive
Metal sulfonium alloy material, enriched substance is then obtained using the fused gold of acid.
Above-mentioned method can produce leaded dust using traditional heating wherein lead smelting, and copper traps to obtain alloy, follow-up difficult
Selective leaching copper, sulphur melting can produce sulfur dioxide flue gas, the one kind of iron trapping preferably, but traditional heating, and the time is longer,
Need to be incorporated reducing agent, make the increase of reduction melting treating capacity.
The content of the invention
For problem above, it is an object of the invention to provide a kind of method that technological process is succinct, the noble metal rate of recovery is high,
The technical problems to be solved by the invention are tapped a blast furnace by quick reduction melting-selective leaching.
The technical solution adopted by the present invention is：A kind of method of fiery wet-process beneficiation low grade noble metal, its feature
It is to complete according to the following steps：
Step（1）Dispensing：By low grade noble metal material and trapping agent reduced iron powder, carborundum powder and slag former by a certain percentage
It is well mixed；
Step（2）Microwave radiation melting：Dispensing is placed in radiant heating in micro-wave oven；
Step（3）Atomization is dusted：Material atomization after radiant heating in micro-wave oven is dusted and obtains iron powder containing noble metal；
Step（4）Selective leaching taps a blast furnace：Noble metal iron powder selective leaching will be contained to tap a blast furnace, obtain concentration of precious metal thing.
Step（1）The wherein described trapping agent of dispensing is reduced iron powder, and dosage is the 30 ~ 60% of noble metal materials；It is described to add
Add agent for lime, one kind in sodium carbonate or be used in mixed way, dosage is the 5 ~ 20% of noble metal materials, and the carborundum powder is carbon
SiClx content is not less than 70%, and dosage is the 30 ~ 80% of noble metal materials.Step（2）Micro-wave oven described in microwave radiation melting
Middle radiant heating, 30 ~ 60min of radiated time.Step（3）Atomization dust described in atomization dust obtain iron powder containing noble metal,
Melted using coreless induction furnace, carry out atomization and dust, atomization mass is nitrogen or air.Step（4）Selective leaching tap a blast furnace described in contain
Precious metal alloys selective leaching is one or more kinds of in tapping a blast furnace the acid used for sulfuric acid, hydrochloric acid, nitric acid.
Advantages of the present invention essentially consists in：
Technological process is simple, smelting time is short, the noble metal rate of recovery is high, and reduced iron powder and carborundum powder are suction ripple material, without
It is incorporated reducing agent.Using the inventive method, the accumulation rate of noble metal is more than 120 times, and the direct yield of noble metal is more than 98.5%.
Brief description of the drawings
Fig. 1 is a kind of process chart of the method for fiery wet-process beneficiation low grade noble metal.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, one is entered to the present invention below in conjunction with instantiation
Step is described in detail：
Embodiment 1
Referring to accompanying drawing 1, condition：Weigh 1000g smoke raw material, trapping agent（Iron content 95.5%）Match 40% for flue dust weight,
Carborundum powder proportioning be additive formula be the 45% of flue dust weight, 10% that slag former lime is flue dust weight, using ball
Grinding machine mixes, and in micro-wave oven is placed in, radiant power 1250kw, radiated time 40min, acquisition contain precious metal alloys.Using height
Frequency stove heat melts, and by the use of nitrogen as atomization gas, forms iron powder containing noble metal, passes through dilute sulfuric acid（25%）Selective leaching taps a blast furnace
Concentration of precious metal thing is obtained, about 130 times of concentration ratio, direct yield 98.9%, noble metal is without scattered.
Embodiment 2
Referring to accompanying drawing 1, condition：Weigh 2000g smoke raw material, trapping agent（Iron content 90.1%）Match 50% for flue dust weight,
Carborundum powder proportioning be additive formula be the 60% of flue dust weight, 5% that slag former ratio sodium carbonate is flue dust weight, using ball
Grinding machine mixes, and in micro-wave oven is placed in, radiant power 1250kw, radiated time 30min, acquisition contain precious metal alloys.Using height
Frequency stove heat melts, and by the use of nitrogen as atomization gas, forms iron powder containing noble metal, passes through watery hydrochloric acid（20%）Selective leaching taps a blast furnace
Concentration of precious metal thing is obtained, about 135 times of concentration ratio, direct yield 98.6%, noble metal is without scattered.
Embodiment 3
Referring to accompanying drawing 1, condition：Weigh 4000g smoke raw material, trapping agent（Iron content 85.2%）Match 50% for flue dust weight,
Carborundum powder proportioning be additive formula be the 80% of flue dust weight, 10% that slag former ratio sodium carbonate is flue dust weight, use
Ball mill mixes, and in micro-wave oven is placed in, radiant power 1250kw, radiated time 60min, acquisition contain precious metal alloys.Using
High frequency stove heat melts, and by the use of nitrogen as atomization gas, forms iron powder containing noble metal, passes through dilute sulfuric acid（30%）Selectively leaching
Iron obtains concentration of precious metal thing, and about 136 times of concentration ratio, direct yield 99.1%, noble metal is without scattered.
Embodiment 4
Referring to accompanying drawing 1, condition：Weigh 5000g smoke raw material, trapping agent（Iron content 89.1%）Match 60% for flue dust weight,
Carborundum powder proportioning be additive formula be the 70% of flue dust weight, 15% that slag former lime is flue dust weight, using ball
Grinding machine mixes, and in micro-wave oven is placed in, radiant power 1250kw, radiated time 60min, acquisition contain precious metal alloys.Using height
Frequency stove heat melts, and by the use of nitrogen as atomization gas, forms iron powder containing noble metal, passes through watery hydrochloric acid（15%）Selective leaching taps a blast furnace
Concentration of precious metal thing is obtained, about 134 times of concentration ratio, direct yield 98.8%, noble metal is without scattered.
Embodiment 5
Referring to accompanying drawing 1, condition：Weigh 8000g smoke raw material, trapping agent（Iron content 92.4%）Match 50% for flue dust weight,
Carborundum powder proportioning be additive formula be the 80% of flue dust weight, 10% that slag former lime is flue dust weight, using ball
Grinding machine mixes, and in micro-wave oven is placed in, radiant power 1250kw, radiated time 50min, acquisition contain precious metal alloys.Using height
Frequency stove heat melts, and by the use of nitrogen as atomization gas, forms iron powder containing noble metal, passes through dilute sulfuric acid（15%）Selective leaching taps a blast furnace
Concentration of precious metal thing is obtained, about 135 times of concentration ratio, direct yield 98.6%, noble metal is without scattered.
Claims (5)
- A kind of 1. method of fiery wet-process beneficiation low grade noble metal, it is characterised in that complete according to the following steps：（1）Dispensing：Low grade noble metal material is mixed by a certain percentage with trapping agent reduced iron powder, carborundum powder and slag former Uniformly；（2）Microwave radiation melting：Dispensing is placed in radiant heating in micro-wave oven；（3）Atomization is dusted：Material atomization after radiant heating in micro-wave oven is dusted and obtains iron powder containing noble metal；（4）Selective leaching taps a blast furnace：Noble metal iron powder selective leaching will be contained to tap a blast furnace, obtain concentration of precious metal thing.
- A kind of 2. method of fiery wet-process beneficiation low grade noble metal according to claim 1, it is characterised in that step（1）Institute The trapping agent stated is reduced iron powder, and dosage is the 30 ~ 60% of noble metal materials；The additive is one kind in lime, sodium carbonate Or be used in mixed way, dosage is the 5 ~ 20% of noble metal materials, and the carborundum powder is that carborundum content is not less than 70%, and dosage is expensive The 30 ~ 80% of metalliferous material.
- A kind of 3. method of fiery wet-process beneficiation low grade noble metal according to claim 1, it is characterised in that step（2）Institute Radiant heating in the micro-wave oven stated, 30 ~ 60min of radiated time.
- A kind of 4. method of fiery wet-process beneficiation low grade noble metal according to claim 1, it is characterised in that step（3）Mist Change, which is dusted, obtains iron powder containing noble metal, is melted using coreless induction furnace, carries out atomization and dust, atomization mass is nitrogen or air.
- A kind of 5. method of fiery wet-process beneficiation low grade noble metal according to claim 1, it is characterised in that step（4）Institute The selective leaching containing precious metal alloys stated is one or more kinds of in tapping a blast furnace the acid used for sulfuric acid, hydrochloric acid, nitric acid.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108004414A (en) * | 2017-12-08 | 2018-05-08 | 江西自立环保科技有限公司 | One kind processing noble metal method of material recycle containing low grade noble metal |
| CN108893594A (en) * | 2018-06-12 | 2018-11-27 | 昆明冶金高等专科学校 | A kind of method of carbon distribution and sulphur in quick abjection failure platinum-rhenium catalyst |
| CN110055424A (en) * | 2019-05-31 | 2019-07-26 | 贵研资源（易门）有限公司 | A method of from melting enriching noble metals in spent catalyst containing ruthenium |
| CN112374751A (en) * | 2020-11-11 | 2021-02-19 | 浙江得铭智能环保科技有限公司 | Treatment method for green recycling of fly ash |
| CN114790512A (en) * | 2022-04-25 | 2022-07-26 | 金川集团股份有限公司 | Method for enriching precious metals in electric furnace materials |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108004414A (en) * | 2017-12-08 | 2018-05-08 | 江西自立环保科技有限公司 | One kind processing noble metal method of material recycle containing low grade noble metal |
| CN108893594A (en) * | 2018-06-12 | 2018-11-27 | 昆明冶金高等专科学校 | A kind of method of carbon distribution and sulphur in quick abjection failure platinum-rhenium catalyst |
| CN110055424A (en) * | 2019-05-31 | 2019-07-26 | 贵研资源（易门）有限公司 | A method of from melting enriching noble metals in spent catalyst containing ruthenium |
| CN112374751A (en) * | 2020-11-11 | 2021-02-19 | 浙江得铭智能环保科技有限公司 | Treatment method for green recycling of fly ash |
| CN114790512A (en) * | 2022-04-25 | 2022-07-26 | 金川集团股份有限公司 | Method for enriching precious metals in electric furnace materials |
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Application publication date: 20171212 |