CN109825709A - A kind of precious metal alloys purification Concentration of Gold silver process - Google Patents
A kind of precious metal alloys purification Concentration of Gold silver process Download PDFInfo
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Abstract
The present invention relates to a kind of precious metal alloys to purify Concentration of Gold silver process.Reduction melting including leaded, bismuth, tin anode mud, vacuum drying oven separate electrum, and the process of refinement oxide furnace removal of impurities obtains the higher electrum of purity, gold and silver direct yield is made to be increased to 97.5-99%；The simple process can reduce production cost, Environmental Safety.
Description
Technical field
The invention belongs to nonferrous metallurgy melting technique fields, and in particular to a kind of precious metal alloys purification enrichment gold and silver work
Skill.
Background technique
The alloy containing noble metal obtained after the enriched reduction melting of the materials containing gold and silver such as the earth of positive pole is molten is known as noble metal conjunction
Gold, its component are different because of material source difference.Common are precious metals containing lead alloy, your bismuth alloy, your tin alloy etc., since lead is
The best trapping agent of noble metal.So lead will be added in the case where lead content is low to trap noble metal.So lead and silver are
The content of the main component of precious metals containing lead, other impurities metal is different and different with the source of material.The content of gold is also with the change of material
Change and changes.The processing of precious metals containing lead generallys use pyro-refining to purify the domestic manufacturing enterprise with scale at present, except using complete
Outside wet processing, point silver stove is mostly used to refine precious metals containing lead greatly, obtains using after containing 98.5% electrum plate for silver electrolysis.
Currently used gold and silver precious metal smelting technique has the following problems referring to 1 process flow of attached drawing, the technique:
1) output refining slag needs reduction melting output alloy again after precious metal alloys are divided silver stove refinement oxide, and production cost increases
Add；
2) gold and silver direct yield is low, about 92.5-93%.
Summary of the invention
The purpose of the present invention is to provide a kind of precious metal alloys to purify Concentration of Gold silver process, which can reduce
Production cost, gold and silver direct yield are increased to 97.5-99%, Environmental Safety.
The object of the present invention is achieved like this, precious metal alloys purification Concentration of Gold silver process of the present invention, including leaded,
The reduction melting of bismuth, tin anode mud, vacuum drying oven separate electrum, and it is higher to obtain purity for the process of refinement oxide furnace removal of impurities
Electrum makes gold and silver direct yield be increased to 97.5-99%；It specifically includes:
A, the reduction melting of leaded, bismuth, tin anode mud
By leaded, bismuth, tin anode mud material conventional reduction melting technique, precious metal alloys are obtained；
B, vacuum drying oven separates electrum
Precious metal alloys are separated by vacuum drying oven, and the thick electrum and base metal for obtaining mass percent purity 45-55% close
Gold；Lowpriced metal alloy is handled with common process, further extracts copper, bismuth, selenium, tellurium, arsenic, antimony, nickel；
C, refinement oxide furnace cleans
The refinement oxide process of thick electrum is divided into three phases:
1) melting of thick electrum and decortication stage
First by cupola well in refinement oxide furnace 800~900 DEG C of high temperature preheating 30min, remove organic matter in cupola well, moisture,
Carbon dioxide and other volatile materials；
It again from vacuum drying oven thick electrum obtained after separation, is placed in the refinement oxide furnace cupola well of red heat, closes fire door, control
950-1100 DEG C of furnace temperature processed, thick electrum fusing is made to generate molten lead liquid；Originally there is one layer of furvous on molten lead liquid surface
Dross, by 10~20min, black scum disappears, and fusion of lead starts shinny, and the fusion of lead table of radiance is then presented between a moment
Face makes fusion of lead generate decortication phenomenon；
2) oxidation and absorption stage
After fusion of lead decortication, furnace temperature adjustment is reduced to 950 DEG C；Air is allowed to enter furnace cavity from the blast orifice of refinement oxide furnace,
At this time due in thick electrum the surface of contained fusion of lead contact with the oxygen in air to be oxidized and become PbO and generate heat, melt
The temperature of lead increases significantly compared with the temperature around furnace cavity, thus fusion of lead surface oxidation lead film is shinny；
Since the lead oxide film of molten is different from the surface tension of fusion of lead, the lead oxide of most molten is by cupola well table
Face is wet, and by the effect of surface tension, cunning is branched away from fusion of lead surface, and the capillary in porosity cupola well cylinder body is made
Under, absorption is infiltrated in porous cupola well cylinder body；And fraction lead oxide falls in gaseous volatilization；Above-mentioned fusion of lead due to
Cohesive force is big, will not be penetrated into and absorb by cupola well cylinder body；It is penetrated into cupola well when lead oxide film is branched away from cunning on fusion of lead surface, dew
New fusion of lead surface is oxidized again out, and the lead oxide film of the molten just generated is penetrated by cupola well cylinder body absorb again, so
Constantly repeatedly, thick electrum is gradually concentrated；
Since lead oxide is absorbed by cupola well cylinder body, it will appear a red annulus around cupola well inner surface, position exists just
Above fusion of lead；
3) color and flash stage are dazzled
Temperature is increased before refinement oxide process will terminate, last temperature should reach 1100 DEG C；With thick electrum
It is gradually concentrated, the continuous reduction of fusion of lead, the ratio of gold and silver increases；The proportional components of silver increase, and stay in cupola well the bottom of a pan center
Electrum, which can be presented on the phenomenon that rotating in cupola well and be accompanied by, dazzles color like rainbow shape；Color is dazzled persistently after several seconds, color
Coloured silk disappears, and particle is dimmed immediately, and finally glittering is primary brilliant on particle after clock every few seconds, and phosphere occur indicates that thick gold and silver closes
Contained fusion of lead is fully oxidized to lead oxide and is absorbed by cupola well cylinder body in gold, and refinement oxide came to an end already, can will be left in
The refining electrum in cupola well the bottom of a pan center takes out；
Impurity in above-mentioned thick electrum is also also oxidized during refinement oxide, the sequencing that they are aoxidized, and each
The formation calorific value of kind metal oxide is related with the size of free energy；Zinc, tin, iron, nickel, cobalt, arsenic, the calorific value of antimony and free energy row
Before lead, bismuth, copper, the heat content of tellurium and free energy are come after lead；By calorific value and the successively oxidation of free energy sequence；Above-mentioned impurity
The oxide generated in refinement oxide, some escape (such as As in gas2O3、Sb2O3), some oxides can be dissolved in oxygen
Change in lead (such as copper oxide), is removed as lead oxide is also absorbed into cupola well cylinder body.
During above-mentioned refinement oxide, in the 1.5% of the total lead oxide weight of lead oxide Zhan that gaseous volatilization falls；98.5% oxygen
Change lead and absorption is penetrated by porous cupola well cylinder body.
The present invention is using vacuum drying oven separation gold and silver and other smithcrafts, the expensive electrum of output and lowpriced metal alloy, drop
Low production cost.During refinement oxide, gold and silver is not only separated with lead the present invention, while can also will enter thick electrum
In impurity remove；Therefore the refining electrum particle that finally obtains is purer, and refinement oxide process time is shorter, about with
The speed of 0.8~1.0g/min carries out, fast and convenient, the good separation of refinement oxide means, and direct yield is high.
Detailed description of the invention
Fig. 1 is common gold and silver precious metal smelting process flow diagram.
Fig. 2 is present invention process flow diagram.
Specific embodiment
Below with reference to embodiment, the invention will be further described, but the present invention is limited in any way, base
In present invention teach that made any transformation, each falls within the scope of the present invention.
Concentration of Gold silver process is purified with reference to a kind of precious metal alloys of attached drawing 2, refinement oxide process:
The thick electrum of vacuum drying oven content 45-55% obtained after separation is placed in cupola well, 950 DEG C -1100 DEG C of temperature control into
Row refinement oxide, fusion of lead is contacted with the oxygen in air at this time becomes lead oxide, due to the effect of surface tension, most of PbO
It is absorbed by porous cupola well, fraction vapors away, and gold and silver is not oxidized, stays among cupola well at graininess.According to metallurgy
In be higher than the oxidizing semlting process of metal oxide fusing point and be called refinement oxide, therefore we claim this separation means to make oxidation smart
Refining process.
Refinement oxide is the important means that noble metal is separated with lead in metal.In refinement oxide, first by cupola well 800
It is preheated in~900 DEG C of high temperature, after removing organic matter, moisture, carbon dioxide and the other volatile materials in cupola well, then
The thick electrum of content 45-55% is put on the cupola well of red heat.If cupola well preheating time not enough if put content 45-55%
Thick electrum, then remaining gas evolution in cupola well breaks through fusion of lead liquid level, small lead drop dished out, this phenomenon is called
" spitting " (spitting).After the thick electrum fusing of content 45-55%, the surface oxidation by air of fusion of lead forms one
Layer lead oxide film.The lead oxide of molten and the surface tension of fusion of lead are different, and lead oxide can be inhaled by cupola well surface wettability
It is received in porous cupola well (capillarity), the cohesive force of fusion of lead is big, is not absorbed by cupola well.The lead oxide of melting is from molten
Melt to slide on lead surface and expose new surface to penetrate into cupola well and be oxidized again, the lead oxide of the molten just generated is again by furnace
Cylinder absorbs, so constantly repeatedly, until lead, which is fully oxidized to lead oxide, to be absorbed by cupola well.In the process, only about
1.5% lead oxide is evaporate into air in steam, and 98.5% or so lead oxide is absorbed by cupola well.Gold and silver is not oxidized.With
After lead absorbs at lead oxide by cupola well, gold and silver is gradually concentrated, and is finished to this process, and gold and silver stays in cupola well recess portion
Centre.Impurity in the thick electrum of content 45-55% is also oxidized during refinement oxide, the sequencing that they are aoxidized,
It is related with the size of the formation heat of various metal oxides and free energy.Zinc, tin, iron, nickel, cobalt, arsenic, antimony lead oxidation before,
Successively oxidation in order, wherein zinc is oxidized to zinc oxide at first, and tin takes second place ....It is bismuth, copper, tellurium oxidation after lead oxidation.These
The oxide that impurity is generated in refinement oxide, some escape (such as As at gas2O3、Sb2O3), some oxides can be dissolved in
In lead oxide (such as copper oxide), it is removed as lead oxide is also absorbed into cupola well.
During refinement oxide, gold and silver is not only separated with lead, while can also close the thick gold and silver for entering content 45-55%
Impurity in gold removes.Therefore the purer refinement oxide process time of gold and silver particle that finally obtains is shorter, about with 0.8~
The speed of 1.0g/min carries out, fast and convenient, the good separation of refinement oxide means, and direct yield is high.This is other oxidations
Refine unexistent advantage.Refinement oxide process can be divided into three phases: the loading of the thick electrum of content 45-55% and
Fusing, content 45-55% thick electrum oxidation and absorption, dazzle color and flash of light；
(1) it melts and peels
The thick electrum of content 45-55% is put into the cupola well for preheating 30min at 900 DEG C, fire door is closed, if cupola well is
It is fully warmed-up, then the thick electrum of content 45-55% should melt immediately.Originally there is the dross of one layer of furvous on surface, if furnace
Interior temperature is suitable, then disappears by 10~20min black scum, and fusion of lead starts shinny, and the molten of radiance is then presented between a moment
Melt lead surface, this phenomenon is called decortication.If delaying 20~30min to peel not yet, it may be possible to which the temperature of high temperature furnace is too
Low perhaps cupola well is not fully warmed-up or furnace atmosphere is strong oxidizing property, or because the thick gold and silver of content 45-55% closes
There are the impurity such as a large amount of tin, nickel in gold.The oxide ester mp of tin, nickel is very high, is covered on the surface of fusion of lead.If contained
It is too many to measure impurity in the thick electrum of 45-55%, is only increasing temperature oxidation refining, but the loss of gold, silver in this way increases.
If the thick electrum of content 45-55% is purer, only because furnace temperature is too low, then the reducing atmosphere that a small amount of reduction furnace generates is added
Lead oxide can be reduced into metallic lead, the thick electrum of content 45-55% is promoted to peel；
(2) it aoxidizes and absorbs
Air is allowed to enter burner hearth after decortication, furnace temperature can be reduced to 950 DEG C, and the temperature of the temperature of fusion of lead relatively surrounding has aobvious at this time
The raising of work, this is because caused by lead is oxidized and generates heat, thus fusion of lead surface is shinny.The lead oxide melted penetrates into furnace
In cylinder, fraction lead oxide is fallen in gaseous volatilization, is risen as cigarette by cupola well.Since lead oxide is absorbed by cupola well, surround
Cupola well occur an annulus, position is just on fusion of lead.If annulus is shiny red, refinement oxide temperature is indicated too
It is high.If refinement oxide temperature is too low, when the temperature on fusion of lead surface is lower than the fusing point of lead oxide, the lead oxide of melting can be complete
Full solidification, encases fusion of lead, because having completely cut off air, so fusion of lead is no longer oxidized, refinement oxide also stops carrying out, this existing
Freeze as being called.Freezeout frequently occurs in the later period of refinement oxide, because at this moment lead is seldom, lead is oxidized the heat of generation
Amount is compared with early period, has been greatly reduced, the temperature in fusion of lead is reducing.If at this moment furnace temperature does not increase, many cold airs
Into in furnace, it is easy to freeze.After freezing, if furnace temperature is increased to temperature when refinement oxide restarts again,
Resulting analysis result is often because temperature is too high and relatively low.Remedial measure is to take out frozen cupola well, adds several grams of lead at once
Skin is reentered into the refining of furnace internal oxidition；
(3) color and flash of light are dazzled
Temperature must be increased before refinement oxide process will terminate.Because at this moment the surface of fusion of lead greatly reduces, oxidation
Generated scorching hot amount also accordingly reduces, and because the ratio of gold and silver increases in lead, and alloy is more difficult as fusion of lead is reduced
It melts.In order to eliminate last drop lead, last temperature should reach 1100 DEG C, but also not be too high, and will cause like that
The loss of gold and silver increases.The ingredient of silver is higher, in rotation phenomenon and has continuous color like rainbow, this phenomenon is known as dazzling color.It dazzles
As long as color only lasts for several seconds, after color disappears, particle, that is, dimmed, finally glittering is primary brilliant on particle after clock every few seconds, this
It is the radiance released because of the latent heat of fusion in particle and occurred again suddenly, this phenomenon is referred to as to glisten.There is phosphere
It indicates that refinement oxide came to an end already, silver thick in cupola well can be taken out.
Influence the factor of refinement oxide.
(1) temperature of refinement oxide
Influence of the temperature to refinement oxide be it is very big, should generally control at 950 DEG C -1100 DEG C, jelly can be generated as temperature is too low
Knot, temperature is too high and loss of gold and silver during refinement oxide is caused to increase.It is, in general, that gold and silver be it is dysoxidizable, still
As the temperature rises, the degree of oxidation of gold and silver is also increasing.After gold and silver oxidation, oxide is absorbed into cupola well with lead oxide
In, or it is scattered in cupola well surface, this is the principal element of gold and silver loss, and amount accounts for about the 90% of total loss.Another reason
It is that the evaporation of gold and silver at high temperature increases with temperature and increased；
The degree that gold and silver loses during entire refinement oxide is different.Very little is lost when beginning, with refinement oxide
Progress, lead amount gradually decreases, and correspondingly concentration of the gold, silver in lead increases, and the loss of gold, silver especially exists also with increasing
Refinement oxide is at the end of, the largest loss.
(2) influence in the presence of base metal to refinement oxide loss
In alloy melting, other than noble metal enters the thick electrum of content 45-55%, there are also it is some easily be reduced or
The element such as copper being easily soluble in lead, bismuth, selenium, tellurium, arsenic, antimony, nickel etc. can also enter in the thick electrum of content 45-55%.This
After a little base metals enter the thick electrum of content 45-55%, the thick electrum of content 45-55% is hardened, when hammering easy breach.
Not only change the physical property of the thick electrum of content 45-55%, can also oxidizing refining bring difficulty, and your gold made
The loss of category increases；
Copper copper is entered in the thick electrum of content 45-55% with different degree, and copper is oxidized to copper oxide, oxygen when refinement oxide
Change copper to be readily dissolved in lead oxide, it is absorbed in cupola well together with lead oxide.The thick gold and silver that copper enters content 45-55% closes
Jin Hou can be such that the surface tension of fusion of lead reduces, and increase loss of the gold, silver in refinement oxide.When the thick gold of content 45-55%
When copper in silver alloy reaches 8.0%, the loss of gold, silver is significantly increased, especially the loss of gold is influenced more significant.Copper
When amount is up to 10.0%, refinement oxide just not can be carried out；
Solubility very little of the nickel nickel oxide in lead oxide, when there are shapes when a small amount of nickel in the thick electrum of content 45-55%
At the dross of dirty-green, a part stays in cupola well top, and another part enters in cupola well, slightly in green on cupola well.As content 45-
Nickeliferous at 0.1% or more in 55% thick electrum, nickel oxide covers the surface of entire fusion of lead, make refinement oxide stop into
Row；
Antimony antimony and lead can be mutually dissolved in liquid, thus may contain a large amount of antimony in the thick electrum of content 45-55%.?
When refinement oxide starts, it initially releases the dense smoke of Sb2O3, content 45-55% thick electrum containing antimony be no less than 1% when
It waits, generates the slag of yellow.This slag is made of the oxide of lead and antimony, and a part floats on the surface of fusion of lead,
A part is penetrated into cupola well.Volume expansion when this slag solidifies.As in the presence of a large amount of antimony, cupola well can be made because of this expansion
It bursts apart, incurs lead liquid stream and fall.Even if a small amount of antimony there are cupola well can be made slightly to be cracked, and leave yellow dross and be formed by spy
Different burr；
The property of arsenic arsenic is similar with antimony, but arsenic is not easily accessed in the thick electrum of content 45-55%, and in oxidation essence
When refining temperature, the vapour pressure of As2O3 is much higher compared with Sb2O3, volatile removing.Due to the two factors, arsenic and lead oxides
The dross of composition is not allowed easily generated；
Iron iron is the thick electrum that will not enter content 45-55%.External a small amount of iron oxide are dissolved in lead oxide, in furnace
The spot of kermesinus is left on cylinder；
Under conditions of metal, the tin in sample is not easy to be reduced into metal tin, but because tin is soluble in lead, so a part of
Tin can enter in the thick electrum of content 45-55%.In refinement oxide, the tin in the thick electrum of content 45-55% is very
Fast is oxidized to SnO2.When Theil indices are greater than 10.0%, the yellow dross that will form one layer of insoluble lead stannate covers melting
Lead surface, stops refinement oxide；
Bismuth bismuth is easily accessible in the thick electrum of content 45-55%, and the bismuth in the thick electrum of content 45-55% exists
Be when refinement oxide after not oxidizable, all lead is all oxidized, bismuth still together with particle, to the last just aoxidize and by
Cupola well absorbs.An orange-yellow ring is formed around particle.When the bismuth in the thick electrum of content 45-55% 0.8% with
Under, it is influenced without what；When more than 0.8%, the loss of gold, silver increases as bi content increases, and main loss is in cupola well；
Tellurium selen-tellurjum selenium has very strong affinity to gold, silver, causes biggish damage to gold, silver during melting and refinement oxide
It loses.Tellurium easily enters in the thick electrum of content 45-55%, and when refinement oxide is not oxidizable, is not easy to blow off when measuring more.Work as sample
The total amount of middle tellurium selenium is 0.6% hereinafter, melting and refinement oxide during does not influence the loss of gold, silver significantly；When tellurium selenium
When measuring more, tellurium can be remained in the gold and silver particle after refinement oxide；When in the thick electrum of content 45-55% selenium containing tellurium up to 3.5%
When, refinement oxide not can be carried out.
Experimentation:
Electrum: 500g.Ingredient is as follows:
According to electrum content:
1 not distribution lead of experiment, refinement oxide amount time 120min.Refine output electrum 260g argentiferous 98.5%.Silver-colored straight receipts
Rate 97.8%.
Test 2 distribution lead 100g.Refinement oxide amount time 130min.Refine output electrum 278g argentiferous 98.8%.
Silver-colored direct yield 98.8%.
Test 3 distribution lead 200g.Refinement oxide amount time 150min.Refine output electrum 228g argentiferous 98.0%.
Silver-colored direct yield 97.3%.
Claims (2)
1. a kind of precious metal alloys purify Concentration of Gold silver process, the reduction melting including leaded, bismuth, tin anode mud, vacuum drying oven point
From electrum, the process of refinement oxide furnace removal of impurities obtains the higher electrum of purity, is increased to gold and silver direct yield
97.5-99%；It is characterized in that, specifically including:
A, the reduction melting of leaded, bismuth, tin anode mud
By leaded, bismuth, tin anode mud material conventional reduction melting technique, precious metal alloys are obtained；
B, vacuum drying oven separates electrum
Precious metal alloys are separated by vacuum drying oven, and the thick electrum and base metal for obtaining mass percent purity 45-55% close
Gold；Lowpriced metal alloy is handled with common process, further extracts copper, bismuth, selenium, tellurium, arsenic, antimony, nickel；
C, refinement oxide furnace cleans
The refinement oxide process of thick electrum is divided into three phases:
1) melting of thick electrum and decortication stage
First by cupola well in refinement oxide furnace 800~900 DEG C of high temperature preheating 30min, remove organic matter in cupola well, moisture,
Carbon dioxide and other volatile materials；
It again from vacuum drying oven thick electrum obtained after separation, is placed in the refinement oxide furnace cupola well of red heat, closes fire door, control
950-1100 DEG C of furnace temperature processed, thick electrum fusing is made to generate molten lead liquid；Originally there is one layer of furvous on molten lead liquid surface
Dross, by 10~20min, black scum disappears, and fusion of lead starts shinny, and the fusion of lead table of radiance is then presented between a moment
Face makes fusion of lead generate decortication phenomenon；
2) oxidation and absorption stage
After fusion of lead decortication, furnace temperature adjustment is reduced to 950 DEG C；Air is allowed to enter furnace cavity from the blast orifice of refinement oxide furnace,
At this time due in thick electrum the surface of contained fusion of lead contact with the oxygen in air to be oxidized and become PbO and generate heat, melt
The temperature of lead increases significantly compared with the temperature around furnace cavity, thus fusion of lead surface oxidation lead film is shinny；
Since the lead oxide film of molten is different from the surface tension of fusion of lead, the lead oxide of most molten is by cupola well table
Face is wet, and by the effect of surface tension, cunning is branched away from fusion of lead surface, and the capillary in porosity cupola well cylinder body is made
Under, absorption is infiltrated in porous cupola well cylinder body；And fraction lead oxide falls in gaseous volatilization；Above-mentioned fusion of lead due to
Cohesive force is big, will not be penetrated into and absorb by cupola well cylinder body；It is penetrated into cupola well when lead oxide film is branched away from cunning on fusion of lead surface, dew
New fusion of lead surface is oxidized again out, and the lead oxide film of the molten just generated is penetrated by cupola well cylinder body absorb again, so
Constantly repeatedly, thick electrum is gradually concentrated；
Since lead oxide is absorbed by cupola well cylinder body, it will appear a red annulus around cupola well inner surface, position exists just
Above fusion of lead；
3) color and flash stage are dazzled
Temperature is increased before refinement oxide process will terminate, last temperature should reach 1100 DEG C；With thick electrum
It is gradually concentrated, the continuous reduction of fusion of lead, the ratio of gold and silver increases；The proportional components of silver increase, and stay in cupola well the bottom of a pan center
Electrum, which can be presented on the phenomenon that rotating in cupola well and be accompanied by, dazzles color like rainbow shape；Color is dazzled persistently after several seconds, color
Coloured silk disappears, and particle is dimmed immediately, and finally glittering is primary brilliant on particle after clock every few seconds, and phosphere occur indicates that thick gold and silver closes
Contained fusion of lead is fully oxidized to lead oxide and is absorbed by cupola well cylinder body in gold, and refinement oxide came to an end already, can will be left in
The refining electrum in cupola well the bottom of a pan center takes out；
Impurity in above-mentioned thick electrum is also also oxidized during refinement oxide, the sequencing that they are aoxidized, and each
The formation calorific value of kind metal oxide is related with the size of free energy；Zinc, tin, iron, nickel, cobalt, arsenic, the calorific value of antimony and free energy row
Before lead, bismuth, copper, the heat content of tellurium and free energy are come after lead；By calorific value and the successively oxidation of free energy sequence；Above-mentioned impurity
The oxide generated in refinement oxide, some such as As2O3、Sb2O3It is escaped in gas, some such as copper oxide can be dissolved in oxygen
Change in lead, is removed as lead oxide is also absorbed into cupola well cylinder body.
2. a kind of precious metal alloys according to claim 1 purify Concentration of Gold silver process, it is characterised in that: the oxidation
In refining process, in the 1.5% of the total lead oxide weight of lead oxide Zhan that gaseous volatilization falls；98.5% lead oxide is by porous cupola well
Cylinder body, which penetrates into, to be absorbed.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109652656A (en) * | 2019-01-29 | 2019-04-19 | 郴州雄风环保科技有限公司 | A kind of precious metal alloys purification process of enriching and refinement oxide furnace |
| CN110819810A (en) * | 2019-11-21 | 2020-02-21 | 株洲冶炼集团股份有限公司 | Comprehensive recovery method for purifying cobalt-nickel slag by zinc hydrometallurgy arsenic salt |
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| CN110819810A (en) * | 2019-11-21 | 2020-02-21 | 株洲冶炼集团股份有限公司 | Comprehensive recovery method for purifying cobalt-nickel slag by zinc hydrometallurgy arsenic salt |
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