CN206721313U - The system for handling metallurgical slag - Google Patents
The system for handling metallurgical slag Download PDFInfo
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- CN206721313U CN206721313U CN201720302119.3U CN201720302119U CN206721313U CN 206721313 U CN206721313 U CN 206721313U CN 201720302119 U CN201720302119 U CN 201720302119U CN 206721313 U CN206721313 U CN 206721313U
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- 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
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Abstract
The utility model discloses the system of processing metallurgical slag, the system includes：Mixing arrangement, there is metallurgical slag entrance, reducing agent entrance, additive entrance and mixed material outlet；The molten separating device of reduction, there is mixed material entrance, the outlet of cupric molten iron and melting slag outlet；Granulation device is atomized, there is cupric molten iron entrance and the thin abrasive grit outlet of cupric；Ammonia bath unit, there is the thin abrasive grit entrance of cupric, ammonia inlet, carbon dioxide entrance, iron powder outlet and the outlet of cupric ammonia leaching solution；Ammonia steaming device, there is cupric ammonia leaching solution entrance, air intake, carbon dioxide outlet, ammonia outlet and cupric oxide outlet.The system gets cupric molten iron by the way that the mixed material direct-reduction containing metallurgical slag and reducing agent is melted, cupric molten iron is soaked into the copper realized by being atomized granulation with ammonia again, iron separates, and copper is reclaimed using ammonia still process method, so that the rate of recovery of copper is not less than 98.5%, TFe content is not less than 95.5wt% in iron powder, and Cu content is not more than 0.05wt%.
Description
Technical field
The utility model belongs to field of hydrometallurgy, specifically, the system that the utility model is related to processing metallurgical slag.
Background technology
Copper ashes and nickel slag are caused slags during copper metallurgy and nickel metallurgy, and 2.2 tons of copper can be produced while smelting 1 ton of refined copper
Slag, China's copper slag yield is big, produces 1500000 tons or so per year.1 ton of nickel is produced using Flash Smelting Furnace smelting process and about discharges 6~16 tons
Nickel slag, only Jinchuan Group will discharge nearly 800,000 tons of nickel slags every year, utilize about 100,000 tons in year, and remaining is deposited in the slag field of company,
Accumulative volume of cargo in storage is up to 10,000,000 tons.The bulk deposition of copper ashes and nickel slag can bring serious water pollution and soil pollution, because
And the comprehensive utilization for strengthening copper ashes and nickel slag is extremely important.The composition of copper ashes and nickel slag approaches, and main component is ferriferous oxide
And silica, main thing are mutually fayalite and a small amount of magnetic iron ore.The research on utilization of copper ashes and nickel slag is mainly collected at present
In valuable metal copper, cobalt, zinc, iron in copper ashes is extracted, the method for use has the skills such as beneficiating method, pyrometallurgical smelting, hydrometallurgy
Art means, wherein, direct-reduction is the pyrometallurgical smelting method of most promising processing copper ashes and nickel slag at present.
Cupric molten iron is the iron-containing product that copper ashes or nickel slag obtain by direct-reduction-molten division technique, and such iron product can
As electric furnace steel making or the raw material of special steel (mainly weathering steel, 0.2~0.8wt% of cupric), but it is used as electric furnace steel making raw material
When, because copper is impurity element, by taking Fine Steel Casting iron as an example, typically require that copper content is less than 0.25wt%, thus this cupric
Molten iron can only be used as dispensing or be sold at a discount.And during as weathering steel raw material, due to being limited by the market demand, product
Advantage also unobvious.
Copper is difficult to realize using conventional method for cupric molten iron, iron efficiently separates, cause that iron product quality is low, product
Value is limited.In the prior art, excessive quantifier elimination only is carried out to the decopper(ing) technology of molten steel.But up to the present, do not have also
A kind of gratifying practical decopper(ing) technology.These methods mostly because the removing inferior capabilities to copper or condition it is too harsh and
Can not further it develop.When such as using fusing partition method, small-sized scrap of the processing containing a large amount of exposure copper is only applicable to；Using gasification
Partition method, then because the problems such as process procedure is more, gaseous contamination environment is difficult to large-scale promotion；Using vacuum separation method, then only
Suitable for molten steel decopper(ing), and the problems such as iron loss is big, removing speed is slow be present, thus be difficult to large-scale industrial application.
Therefore, the technology of existing both metallurgical slags of processing copper ashes and nickel slag is further improved.
Utility model content
The utility model is intended to one of technical problem at least solving in correlation technique to a certain extent.Therefore, this reality
It is to propose a kind of system for handling metallurgical slag with a new purpose.The system passes through containing metallurgical slag and reducing agent
Mixed material direct-reduction-melt and get cupric molten iron, then cupric molten iron is soaked into the copper of realization, iron point by being atomized granulation and ammonia
From, and reclaimed copper using ammonia still process method so that the rate of recovery of copper is not less than 98.5%, and TFe content is not less than in iron powder
95.5wt%, Cu content are not more than 0.05wt%.
In one side of the present utility model, the utility model proposes a kind of system for handling metallurgical slag, the metallurgy
Cinder ladle includes at least one of copper ashes and nickel slag, and according to embodiment of the present utility model, the system includes：
There is metallurgical slag entrance, reducing agent entrance, additive entrance and mixed material to go out for mixing arrangement, the mixing arrangement
Mouthful；
Reduction-molten separating device, the reduction-molten separating device have mixed material entrance, the outlet of cupric molten iron and melting slag
Outlet, the mixed material entrance are connected with mixed material outlet；
Granulation device is atomized, the atomization granulation device has cupric molten iron entrance and the thin abrasive grit outlet of cupric, described to contain
Copper and iron water inlet is connected with cupric molten iron outlet；
There is the thin abrasive grit entrance of cupric, ammonia inlet, carbon dioxide entrance, iron powder to go out for ammonia bath unit, the ammonia bath unit
Mouth and the outlet of cupric ammonia leaching solution, the thin abrasive grit entrance of the cupric abrasive grit outlet thin with the cupric are connected；
There is cupric ammonia leaching solution entrance, air intake, carbon dioxide outlet, ammonia to go out for ammonia steaming device, the ammonia steaming device
Mouthful and cupric oxide outlet, the outlet of the cupric ammonia leaching solution entrance and the cupric ammonia leaching solution is connected, the carbon dioxide outlet and
The carbon dioxide entrance is connected.
According to the system of the Treatment of Copper molten iron of the utility model embodiment, by will be mixed containing metallurgical slag and reducing agent
Compound material is directly carried out reducing-melting office reason, and the iron in metallurgical slag can be reduced to metallic iron, and after molten point of warp, containing copper and iron
Water separates with melting slag；It is the thin abrasive grit of cupric by the way that cupric molten iron is pelletized through atomization, the thin abrasive grit of cupric can be dramatically increased
Surface area, be advantageous to improve the efficiency of follow-up ammonia leaching processing and ammonia still process processing, improve the rate of dissolution of copper, while save energy consumption；
The thin abrasive grit of above-mentioned cupric is handled using ammoniacal liquor and carbon dioxide, because ammonia spirit is having carbon dioxide (or ammonium carbonate) to deposit
When can dissolve Cu oxide and metallic copper, obtain containing the cuprous cupric ammonia leaching solution of ammonium carbonate, and iron is still in the form of metallic iron
In the presence of so as to remove the copper in iron power removing；And ammonium carbonate is cuprous can be oxidized in the presence of having air, the ammonium carbonate of copper is generated
Salt, and ammonium carbonate salts can further dissolve metallic copper, in this way, can be abundant by the copper dissolution in the thin abrasive grit of cupric, at ammonia still process
After reason, ammonium carbonate is cuprous to react with oxygen, generation cupric oxide, ammonia and carbon dioxide, so as to realize the recycling of copper,
And caused ammonia and carbon dioxide can be back to ammonia bath unit, advantageously reduce the cost of raw material of whole system.Thus,
Cupric molten iron is got by the way that the mixed material containing metallurgical slag and reducing agent to be reduced directly-melt using the system, then will be contained
Copper and iron water soaks the copper realized by being atomized granulation with ammonia, iron separates, and is reclaimed copper using ammonia still process method so that the recovery of copper
Rate is not less than 98.5%, and TFe content is not less than 95.5wt% in iron powder, and Cu content is not more than 0.05wt%.
In addition, according to the system of the processing metallurgical slag of the utility model above-described embodiment, can also have what is added as follows
Technical characteristic：
Optional, the system of above-mentioned processing metallurgical slag further comprises：Water absorption plant, the water absorption plant have ammonia
Gas entrance and ammoniacal liquor outlet, the ammonia entrance are connected with the ammonia outlet, the ammoniacal liquor outlet and the ammonia inlet phase
Even.Thus, the Ammonia recovery obtained by ammonia steaming device is utilized, reduces the cost of raw material of system, improve the economy of system.
Optional, the ammonia bath unit is stirred leaching tank.Thus, be advantageous to improve the dissolving speed of copper in the thin abrasive grit of cupric
Rate.
Optional, the ammonia steaming device is destilling tower.Thus, be advantageous to improve the efficiency of ammonia still process processing, while reclaim ammonia
Gas and carbon dioxide.
Additional aspect and advantage of the present utility model will be set forth in part in the description, partly by from following description
In become obvious, or by it is of the present utility model practice recognize.
Brief description of the drawings
Of the present utility model above-mentioned and/or additional aspect and advantage will in the description from combination accompanying drawings below to embodiment
Become obvious and be readily appreciated that, wherein：
Fig. 1 is the system structure diagram according to the processing metallurgical slag of the utility model one embodiment；
Fig. 2 is the system structure diagram according to the processing metallurgical slag of the utility model further embodiment；
Fig. 3 is that the method flow that metallurgical slag is handled according to the system of the processing metallurgical slag of the utility model one embodiment shows
It is intended to；
Fig. 4 is the method flow according to the system processing metallurgical slag of the processing metallurgical slag of the utility model further embodiment
Schematic diagram.
Embodiment
Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning
Same or similar element is represented to same or similar label eventually or there is the element of same or like function.Below by ginseng
The embodiment for examining accompanying drawing description is exemplary, it is intended to for explaining the utility model, and it is not intended that to the utility model
Limitation.
In the utility model, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be
Mechanically connect or electrically connect；Can be joined directly together, can also be indirectly connected by intermediary, can be two
The connection of element internal or the interaction relationship of two elements, limited unless otherwise clear and definite.For the common skill of this area
For art personnel, concrete meaning of the above-mentioned term in the utility model can be understood as the case may be.
In one side of the present utility model, the utility model proposes a kind of system of Treatment of Copper molten iron, according to this
The embodiment of utility model, with reference to figure 1, the system includes：Mixing arrangement 100, reduction-molten separating device 200, atomization granulation device
300th, ammonia bath unit 400 and ammonia steaming device 500.
According to embodiment of the present utility model, mixing arrangement 100 has metallurgical slag entrance 101, reducing agent entrance 102, added
Agent entrance 103 and mixed material is added to export 104, and suitable for metallurgical slag, reducing agent and additive are mixed, to be mixed
Compound material.Specifically, metallurgical slag can include at least one of copper ashes and nickel slag.Thus, be advantageous to improve metallurgical slag with going back
Former agent, the contact area of additive, and then improve the speed that mixed material is handled in sequential reduction.It should be noted that reduction
The type of agent and additive is not particularly restricted, and those skilled in the art can be selected according to being actually needed, for example,
Reducing agent can be reduction coal, and additive can be calcium oxide.
According to one embodiment of the present utility model, the content of copper and the content of full iron are not limited especially in metallurgical slag
System, those skilled in the art can be selected according to being actually needed, according to a specific embodiment of the present utility model, smelting
Copper content can be 0.15~0.85wt% in golden slag, and all iron content can be 35~45wt%.Inventor has found, if metallurgical
Iron content is too high in slag or copper content is too low, technically just without necessity of copper removal；If iron content is too low, then means to contain
Remaining impurity content is too high in copper and iron powder, and these impurity can have a strong impact on iron product and aoxidize the quality of copper products.Inventor is led to
Lot of experiments discovery is crossed, when copper content is 0.15~0.85wt% in metallurgical slag, when iron content is 35~45wt%, using this Shen
The technology please proposed may be such that copper and iron good separating effect, and the iron product and cupric oxide product grade finally given is high.
According to further embodiment of the present utility model, metallurgical slag and reducing agent, additive mixing quality than not by
Especially limitation, those skilled in the art can be selected according to being actually needed, specific real according to one of the present utility model
Example is applied, can be by metallurgical slag, reducing agent and additive according to mass ratio 100：(10~30)：(3~15) are mixed.Inventor
It was found that when reducing agent dosage is too low, the reduction effect of iron is bad in metallurgical slag, and when reducing agent dosage is too high, can not
Significantly improve the recovery index of iron and cause the waste of reducing agent.The supplying of additive be intended to promote metallurgical slag in iron reduction and
Recovery, too high or too low effect are bad.Inventor had been surprisingly found that by lot of experiments, when by metallurgical slag, reducing agent and addition
Agent is according to mass ratio 100：(10~30)：When (3~15) are mixed, the iron in metallurgical slag can be made fully to be reduced, iron returns
It is good to receive index.
According to embodiment of the present utility model, there is reduction-molten separating device 200 mixed material entrance 201, cupric molten iron to go out
Mouth 202 and melting slag outlet 203, mixed material entrance 201 are connected with mixed material outlet 104, and suitable for mixed material is entered
Row reduction-molten office reason, to obtain cupric molten iron and melting slag.Inventor has found that the iron in metallurgical slag is mainly with iron olive
The form of stone and ferroso-ferric oxide is present, and reduction-melt and divide process to include reduction and molten office reason, metallurgical slag is in certain reduction bar
Under part, with the carbon in reducing agent reduction reaction occurs for fayalite and ferroso-ferric oxide, obtains metallic iron, silica and an oxygen
Change carbon, and carbon monoxide can act also as reducing agent and further be reacted with fayalite and ferroso-ferric oxide, in this way, being remarkably improved
The content of iron in cupric molten iron, additive can be used as fluxing agent, so as to reduce the energy consumption of reduction treatment.It should be noted that also
Former-molten separating device is not particularly restricted, and those skilled in the art can be selected according to being actually needed, such as can be
The combined apparatus of rotary hearth furnace and molten separating device, and those skilled in the art can be according to being actually needed to reducing and melting a point process
Concrete operations condition selected.The reaction equation for the main chemical reactions that the reduction process occurs has：
Fe2SiO4+ 2C=2Fe+SiO2+2CO (1)
Fe3O4+ 4C=3Fe+4CO (2)
CO2+ C=2CO (3)
Fe2SiO4+ 2CO=2Fe+SiO2+2CO2 (4)
Fe3O4+ 4CO=3Fe+4CO2 (5)
According to one embodiment of the present utility model, the content of copper and iron is not particularly restricted in cupric molten iron, ability
Field technique personnel can be selected according to being actually needed, according to a specific embodiment of the present utility model, in cupric molten iron
Copper content can be 0.4~1wt%, and iron content can be 90~95wt%.Inventor has found, if iron content in cupric molten iron
Too high or copper content is too low (iron content close to 100wt% or copper content close to 0wt%), technically just without necessity of copper removal；
If iron content is too low, then means that remaining impurity content is too high in the thin abrasive grit of cupric, these impurity can have a strong impact on that iron produces
The quality of product and oxidation copper products.Inventor had found by lot of experiments, when copper content is 0.4~1wt% in cupric molten iron, iron
When content is 90~95wt%, copper and iron good separating effect may be such that using the technology of the application, the iron product and oxygen finally given
It is high to change copper products grade.
According to embodiment of the present utility model, atomization granulation device 300 has cupric molten iron entrance 301 and the thin abrasive grit of cupric
Outlet 302, cupric molten iron entrance 301 are connected with cupric molten iron outlet 202, and suitable for be atomized at granulation cupric molten iron
Reason, to obtain the thin abrasive grit of cupric.Specifically, atomization pelletization is will in atomizer using High-Pressure Water or inert gas
Cupric molten iron is smashed as fine droplet, then the thin abrasive grit of the cupric met the size requirements after cooling down, dry, sieve, mist
It is when High-Pressure Water or inert gas impact cupric molten iron to change mechanism, converts kinetic energy into the surface energy of cupric molten iron, is formed
Numerous fine particle.Inventor has found, by the way that to the thin abrasive grit of cupric, it is thin the atomization granulation of cupric molten iron can be dramatically increased into cupric
The surface area of abrasive grit, be advantageous to improve the efficiency of follow-up ammonia leaching processing and ammonia still process processing, improve the rate of dissolution of copper, save simultaneously
Energy consumption.
According to one embodiment of the present utility model, the particle diameter of the thin abrasive grit of cupric is not particularly restricted, art technology
Personnel can be selected according to being actually needed, according to a specific embodiment of the present utility model, the particle diameter of the thin abrasive grit of cupric
74 microns of accountings 85% can be not more than.Inventor has found, compared to other particle diameters, can ensure that copper fully exposes under the particle diameter
In outside, it is had sufficiently large contact area with leachate, be advantageous to improve reaction rate.
According to embodiment of the present utility model, ammonia bath unit 400 have the thin abrasive grit entrance 401 of cupric, ammonia inlet 402,
Carbon dioxide entrance 403, iron powder outlet 404 and cupric ammonia leaching solution outlet 405, the thin abrasive grit entrance 401 of cupric and the thin abrasive grit of cupric
Outlet 302 is connected, and suitable for the thin abrasive grit of cupric, ammoniacal liquor and carbon dioxide are carried out into ammonia leaching processing, to obtain iron powder and cupric
Ammonia leaching solution.Inventor has found, the thin abrasive grit of above-mentioned cupric is handled by using ammoniacal liquor and carbon dioxide, because ammonia spirit exists
Cu oxide and metallic copper can be dissolved in the presence of carbon dioxide (or ammonium carbonate) by having, and obtain soaking containing cuprammonium containing ammonium carbonate is cuprous
Liquid, and iron exists still in the form of metallic iron, so as to remove the copper in iron power removing, obtains the iron powder of high-purity.Sent out in the device
The reaction equation of raw main chemical reactions is：
CuO+2NH4OH+(NH4)2CO3=Cu (NH3)4CO3+3H2O (6)
Cu(NH3)4CO3+ Cu=Cu2(NH3)4CO3 (7)
According to one embodiment of the present utility model, ammonia bath unit is not particularly restricted, and those skilled in the art can be with
Selected according to being actually needed, according to a specific embodiment of the present utility model, ammonia bath unit can be stirred leaching tank.
Thus, be advantageous to improve the rate of dissolution of copper in the thin abrasive grit of cupric.
According to further embodiment of the present utility model, ammonia soaks ammoniacal liquor mass concentration and titanium dioxide in processing procedure ammonia leaching solution
Carbon mass concentration is not particularly restricted, and those skilled in the art can be selected according to being actually needed, new according to this practicality
One specific embodiment of type, it can be 1~10% that ammonia, which soaks ammoniacal liquor mass concentration in processing procedure ammonia leaching solution, carbon dioxide quality
Concentration can be 2~6%.Inventor has found, if ammoniacal liquor mass concentration and carbon dioxide quality in ammonia leaching processing procedure ammonia leaching solution
Concentration is too low, can reduce the Leach reaction speed of copper；If ammoniacal liquor mass concentration is too high, Ammonia valatilization can be caused serious, caused
A large amount of ammonia reagent losses；Ammoniacal liquor mass concentration can not it is too high on the premise of, unilaterally make carbon dioxide mass concentration too high simultaneously
The Leach reaction speed of copper can not be improved, can also cause to waste.Inventor had been surprisingly found that by lot of experiments, ammoniacal liquor in ammonia leaching solution
Mass concentration is 1~10%, and when carbon dioxide mass concentration is 2~6%, the copper dissolution rate in the thin iron powder of cupric is fast, copper and iron
Good separating effect.
According to another embodiment of the present utility model, the condition of ammonia leaching processing is not particularly restricted, art technology
Personnel can be selected according to being actually needed, according to a specific embodiment of the present utility model, liquid-solid ratio in ammonia leaching processing
Can be (1~10):1, temperature can be 40~50 degrees Celsius, and the time can be not less than 10min.Inventor has found, at ammonia leaching
When liquid-solid ratio is too high in reason, the waste of ammonia leaching solution can be caused, and when liquid-solid ratio is too low, then copper dissolution can be caused insufficient, it is unfavorable
In obtaining the iron powder of high-purity.And temperature is too low can have a strong impact on reaction rate for ammonia leaching, temperature is too high, can increase the partial pressure of ammonia
Height, make ammonia loss serious.Inventor has been surprisingly found that the time of ammonia leaching processing is in model described in the utility model by many experiments
It may be such that the copper in the thin abrasive grit of cupric farthest dissolves when enclosing interior.
According to embodiment of the present utility model, ammonia steaming device 500 have cupric ammonia leaching solution entrance 501, air intake 502,
Carbon dioxide outlet 503, ammonia outlet 504 and cupric oxide outlet 505, cupric ammonia leaching solution entrance 501 exports with cupric ammonia leaching solution
405 are connected, and carbon dioxide outlet 503 is connected with carbon dioxide entrance 403, and suitable for cupric ammonia leaching solution and air are carried out into ammonia still process
Processing, to obtain carbon dioxide, ammonia and cupric oxide, and carbon dioxide is returned into ammonia bath unit.Inventor has found, is soaked through ammonia
The obtained cuprous ammonium carbonate salts that can be oxidized in the presence of having air, generate copper of ammonium carbonate are handled, and ammonium carbonate salts can enter
One step dissolves metallic copper, in this way, can be abundant by the copper dissolution in the thin abrasive grit of cupric, after ammonia still process is handled, ammonium carbonate be cuprous and oxygen
Gas reacts, generation cupric oxide, ammonia and carbon dioxide, so as to realize the recycling of copper, and caused ammonia and dioxy
Ammonia bath unit can be back to by changing carbon, advantageously reduce the cost of raw material of whole system.The primary chemical occurred in the device is anti-
The reaction equation answered is：
Cu2(NH3)4CO3+(NH4)2CO3+2NH4OH+0.5O2=2Cu (NH3)4CO3+3H2O (8)
2Cu2(NH3)4CO3+O2=4CuO+8NH3+2CO2 (9)
According to one embodiment of the present utility model, ammonia steaming device is not particularly restricted, and those skilled in the art can be with
Selected according to being actually needed, according to a specific embodiment of the present utility model, ammonia steaming device can be destilling tower.By
This, is advantageous to improve the efficiency of ammonia still process processing, while reclaims ammonia and carbon dioxide.
Specifically, cupric ammonia leaching solution is allowed to be atomized by the nozzle on ammonia steaming device (destilling tower) top, atomized particles exist
Moved downward in tower in suspended state, carry out mass-and heat-transfer rapidly with the steam stream for being passed through tower bottom and from bottom to top moving, make
Volatile NH3And CO2Become steam state to discharge from tower top, and cupric ammine complex Cu2(NH3)4CO3Then thermally decompose, copper is with oxygen
Change copper CuO Precipitations, the CuO separated out under suspended state because its proportion is larger and under fall on bottom of towe and discharged with raffinate.
According to the system of the Treatment of Copper molten iron of the utility model embodiment, by will be mixed containing metallurgical slag and reducing agent
Compound material is directly carried out reducing-melting office reason, and the iron in metallurgical slag can be reduced to metallic iron, and after molten point of warp, containing copper and iron
Water separates with melting slag；It is the thin abrasive grit of cupric by the way that cupric molten iron is pelletized through atomization, the thin abrasive grit of cupric can be dramatically increased
Surface area, be advantageous to improve the efficiency of follow-up ammonia leaching processing and ammonia still process processing, improve the rate of dissolution of copper, while save energy consumption；
The thin abrasive grit of above-mentioned cupric is handled using ammoniacal liquor and carbon dioxide, because ammonia spirit is having carbon dioxide (or ammonium carbonate) to deposit
When can dissolve Cu oxide and metallic copper, obtain containing the cuprous cupric ammonia leaching solution of ammonium carbonate, and iron is still in the form of metallic iron
In the presence of so as to remove the copper in iron power removing；And ammonium carbonate is cuprous can be oxidized in the presence of having air, the ammonium carbonate of copper is generated
Salt, and ammonium carbonate salts can further dissolve metallic copper, in this way, can be abundant by the copper dissolution in the thin abrasive grit of cupric, at ammonia still process
After reason, ammonium carbonate is cuprous to react with oxygen, generation cupric oxide, ammonia and carbon dioxide, so as to realize the recycling of copper,
And caused ammonia and carbon dioxide can be back to ammonia bath unit, advantageously reduce the cost of raw material of whole technique.Thus,
The system gets cupric molten iron by the way that the mixed material containing metallurgical slag and reducing agent to be reduced directly-melt, then will contain copper and iron
Water soaks the copper realized by being atomized granulation with ammonia, iron separates, and is reclaimed copper using ammonia still process method so that the rate of recovery of copper is not
Less than 98.5%, TFe content is not less than 95.5wt% in iron powder, and Cu content is not more than 0.05wt%.
According to the system of the processing metallurgical slag of the utility model above-described embodiment, with reference to figure 2, the system further comprises：
Water absorption plant 600.
According to embodiment of the present utility model, water absorption plant 600 has ammonia entrance 601 and ammoniacal liquor outlet 602, ammonia
Entrance 601 is connected with ammonia outlet 504, and ammoniacal liquor outlet 602 is connected with ammonia inlet 402 and the ammonia suitable for ammonia steaming device is obtained
Gas is handled, and to obtain ammoniacal liquor, and ammoniacal liquor is back into ammonia bath unit.Thus, ammonia caused by ammonia steaming device can be filled
Divide recovery, and the ammoniacal liquor of gained can be back to above-mentioned ammonia bath unit, advantageously reduce the cost of raw material of whole system, drop
Low energy consumption, improve the economy of system.
In order to facilitate understanding, below with reference to Fig. 3-4, at the system using the processing metallurgical slag of the utility model embodiment
The method of reason metallurgical slag is described in detail, and according to embodiment of the present utility model, with reference to figure 3, this method includes：
S100：Metallurgical slag, reducing agent and additive are supplied and mixed into mixing arrangement
In the step, metallurgical slag, reducing agent and additive are supplied and mixed into mixing arrangement, to be mixed
Material.Specifically, metallurgical slag can include at least one of copper ashes and nickel slag.Thus, be advantageous to improve metallurgical slag and reduction
Agent, the contact area of additive, and then improve the speed that mixed material is handled in sequential reduction.It should be noted that reducing agent
It is not particularly restricted with the type of additive, those skilled in the art can be selected according to being actually needed, for example, also
Former agent can be reduction coal, and additive can be calcium oxide.
According to one embodiment of the present utility model, the content of copper and the content of full iron are not limited especially in metallurgical slag
System, those skilled in the art can be selected according to being actually needed, according to a specific embodiment of the present utility model, smelting
Copper content can be 0.15~0.85wt% in golden slag, and all iron content can be 35~45wt%.Inventor has found, if metallurgical
Iron content is too high in slag or copper content is too low, technically just without necessity of copper removal；If iron content is too low, then means to contain
Remaining impurity content is too high in copper and iron powder, and these impurity can have a strong impact on iron product and aoxidize the quality of copper products.Inventor is led to
Lot of experiments discovery is crossed, when copper content is 0.15~0.85wt% in metallurgical slag, when iron content is 35~45wt%, using this Shen
Technology please may be such that copper and iron good separating effect, and the iron product and cupric oxide product grade finally given is high.
According to further embodiment of the present utility model, metallurgical slag and reducing agent, additive mixing quality than not by
Especially limitation, those skilled in the art can be selected according to being actually needed, specific real according to one of the present utility model
Example is applied, can be by metallurgical slag, reducing agent and additive according to mass ratio 100：(10~30)：(3~15) are mixed.Inventor
It was found that when reducing agent dosage is too low, the reduction effect of iron is bad in metallurgical slag, and when reducing agent dosage is too high, can not
Significantly improve the recovery index of iron and cause the waste of reducing agent.The supplying of additive be intended to promote metallurgical slag in iron reduction and
Recovery, too high or too low effect are bad.Inventor had been surprisingly found that by lot of experiments, when by metallurgical slag, reducing agent and addition
Agent is according to mass ratio 100：(10~30)：When (3~15) are mixed, the iron in metallurgical slag can be made fully to be reduced, iron returns
It is good to receive index.
S200：Mixed material is supplied to reduction to-in molten separating device reduce-and melts office reason
Mixed material in the step, is supplied to reduction to-in molten separating device reduce-and office reason is melted, to be contained
Copper and iron water and melting slag.Inventor has found that the iron in metallurgical slag mainly exists in the form of fayalite and ferroso-ferric oxide, also
Former-molten subpackage is containing reduction and molten office reason, and metallurgical slag is under certain reducing condition, fayalite and ferroso-ferric oxide and reduction
Reduction reaction occurs for the carbon in agent, obtains metallic iron, silica and carbon monoxide, and carbon monoxide can act also as reducing agent and enter
One step is reacted with fayalite and ferroso-ferric oxide, in this way, being remarkably improved the content of iron in cupric molten iron, additive can conduct
Fluxing agent, so as to reduce the energy consumption of reduction treatment.It should be noted that reduction-molten separating device is not particularly restricted, this area
Technical staff can be selected according to being actually needed, such as can be the combined apparatus of rotary hearth furnace and molten separating device, and
Those skilled in the art can be selected the concrete operations condition for reducing and melting point process according to being actually needed.This was reduced
The reaction equation of Cheng Fasheng main chemical reactions has：
Fe2SiO4+ 2C=2Fe+SiO2+2CO (1)
Fe3O4+ 4C=3Fe+4CO (2)
CO2+ C=2CO (3)
Fe2SiO4+ 2CO=2Fe+SiO2+2CO2 (4)
Fe3O4+ 4CO=3Fe+4CO2 (5)
According to one embodiment of the present utility model, the content of copper and iron is not particularly restricted in cupric molten iron, ability
Field technique personnel can be selected according to being actually needed, according to a specific embodiment of the present utility model, in cupric molten iron
Copper content can be 0.4~1wt%, and iron content can be 90~95wt%.Inventor has found, if iron content in cupric molten iron
Too high or copper content is too low (iron content is close to 100% or copper content close to 0%), technically just without necessity of copper removal；If
Iron content is too low, then mean that remaining impurity content is too high in the thin abrasive grit of cupric, these impurity can have a strong impact on iron product and
Aoxidize the quality of copper products.Inventor had found by lot of experiments, when copper content is 0.4~1wt% in cupric molten iron, iron content
For 90~95wt% when, copper and iron good separating effect may be such that using the technology of the application, the iron product and cupric oxide finally given
Product grade is high.
S300：Cupric molten iron is supplied and carries out atomization pelletization treatment into atomization granulation device
In the step, cupric molten iron is supplied and carries out atomization pelletization treatment into atomization granulation device, to obtain cupric
Thin abrasive grit.Specifically, atomization pelletization is to be smashed into cupric molten iron in atomizer using High-Pressure Water or inert gas
For fine droplet, then the thin abrasive grit of cupric met the size requirements after cooling down, dry, sieve, atomization mechanism is to work as high pressure
When current or inert gas impact cupric molten iron, the surface energy of cupric molten iron is converted kinetic energy into, forms numerous fine particle.
Inventor has found, by that to the thin abrasive grit of cupric, can dramatically increase the surface area of the thin abrasive grit of cupric, have the atomization granulation of cupric molten iron
Beneficial to the efficiency for improving follow-up ammonia leaching processing and ammonia still process processing, the rate of dissolution of copper is improved, while save energy consumption.
According to one embodiment of the present utility model, the particle diameter of the thin abrasive grit of cupric is not particularly restricted, art technology
Personnel can be selected according to being actually needed, according to a specific embodiment of the present utility model, the particle diameter of the thin abrasive grit of cupric
74 microns of accountings 85% can be not more than.Inventor has found, compared to other particle diameters, can ensure that copper fully exposes under the particle diameter
In outside, it is had sufficiently large contact area with leachate, be advantageous to improve reaction rate.
S400：The thin abrasive grit of cupric, ammoniacal liquor and carbon dioxide are supplied into ammonia bath unit and carry out ammonia leaching processing
In the step, the thin abrasive grit of cupric, ammoniacal liquor and carbon dioxide are supplied into ammonia bath unit and carry out ammonia leaching processing, so as to
Obtain iron powder and cupric ammonia leaching solution.Inventor find, by using ammoniacal liquor and carbon dioxide to the thin abrasive grit of above-mentioned cupric at
Reason, because ammonia spirit can dissolve Cu oxide and metallic copper in the presence of having carbon dioxide (or ammonium carbonate), is obtained containing carbonic acid
The cuprous cupric ammonia leaching solution of ammonium, and iron exists still in the form of metallic iron, so as to remove the copper in iron power removing, obtains high-purity
Iron powder.The reaction equation of the main chemical reactions of generation is in the device：
CuO+2NH4OH+(NH4)2CO3=Cu (NH3)4CO3+3H2O (6)
Cu(NH3)4CO3+ Cu=Cu2(NH3)4CO3 (7)
According to one embodiment of the present utility model, ammonia soaks ammoniacal liquor mass concentration and carbon dioxide in processing procedure ammonia leaching solution
Mass concentration is not particularly restricted, and those skilled in the art can be selected according to being actually needed, according to the utility model
A specific embodiment, ammonia leaching processing procedure ammonia leaching solution in ammoniacal liquor mass concentration can be 1~10%, carbon dioxide quality is dense
Degree can be 2~6%.Inventor has found, if ammoniacal liquor mass concentration and carbon dioxide quality are dense in ammonia leaching processing procedure ammonia leaching solution
Spend low, the Leach reaction speed of copper can be reduced；If ammoniacal liquor mass concentration is too high, Ammonia valatilization can be caused serious, caused big
Measure ammonia reagent loss；Ammoniacal liquor mass concentration can not it is too high on the premise of, unilaterally make carbon dioxide mass concentration too high not
The Leach reaction speed of copper can be improved, can also cause to waste.Inventor had been surprisingly found that by lot of experiments, ammoniacal liquor matter in ammonia leaching solution
It is 1~10% to measure concentration, and when carbon dioxide mass concentration is 2~6%, the copper dissolution rate in the thin iron powder of cupric is fast, copper and iron point
It is good from effect.
According to further embodiment of the present utility model, the condition of ammonia leaching processing is not particularly restricted, art technology
Personnel can be selected according to being actually needed, according to a specific embodiment of the present utility model, liquid-solid ratio in ammonia leaching processing
Can be (1~10):1, temperature can be 40~50 degrees Celsius, and the time can be not less than 10min.Inventor has found, at ammonia leaching
When liquid-solid ratio is too high in reason, the waste of ammonia leaching solution can be caused, and when liquid-solid ratio is too low, then copper dissolution can be caused insufficient, it is unfavorable
In obtaining the iron powder of high-purity.And temperature is too low can have a strong impact on reaction rate for ammonia leaching, temperature is too high, can increase the partial pressure of ammonia
Height, make ammonia loss serious.Inventor has been surprisingly found that the time of ammonia leaching processing is in model described in the utility model by many experiments
It may be such that the copper in the thin abrasive grit of cupric farthest dissolves when enclosing interior.
S500：Cupric ammonia leaching solution and air are supplied into ammonia steaming device and carry out ammonia still process processing
In the step, cupric ammonia leaching solution and air are supplied into ammonia steaming device and carry out ammonia still process processing, to obtain dioxy
Change carbon, ammonia and cupric oxide, and carbon dioxide is returned into the ammonia bath unit in S400.Inventor has found, handles to obtain through ammonia leaching
The cuprous ammonium carbonate salts that can be oxidized in the presence of having air, generate copper of ammonium carbonate, and ammonium carbonate salts can further dissolve
Metallic copper, in this way, can be abundant by the copper dissolution in the thin abrasive grit of cupric, after ammonia still process is handled, ammonium carbonate is cuprous to be occurred instead with oxygen
Should, generation cupric oxide, ammonia and carbon dioxide, so as to realize the recycling of copper, and caused ammonia and carbon dioxide can return
For ammonia bath unit, the cost of raw material of whole system is advantageously reduced.The reaction of the main chemical reactions occurred in the device
Formula is：
Cu2(NH3)4CO3+(NH4)2CO3+2NH4OH+0.5O2=2Cu (NH3)4CO3+3H2O (8)
2Cu2(NH3)4CO3+O2=4CuO+8NH3+2CO2 (9)
Specifically, cupric ammonia leaching solution is allowed to be atomized by the nozzle on ammonia steaming device (destilling tower) top, atomized particles exist
Moved downward in tower in suspended state, carry out mass-and heat-transfer rapidly with the steam stream for being passed through tower bottom and from bottom to top moving, make
Volatile NH3And CO2Become steam state to discharge from tower top, and cupric ammine complex Cu2(NH3)4CO3Then thermally decompose, copper is with oxygen
Change copper CuO Precipitations, the CuO separated out under suspended state because its proportion is larger and under fall on bottom of towe and discharged with raffinate.
According to the method for the system Treatment of Copper molten iron of the Treatment of Copper molten iron of the utility model embodiment, by that will contain
The mixed material of metallurgical slag and reducing agent directly carries out reducing-melting office reason, the iron in metallurgical slag can be reduced into metallic iron, and
After through molten point, cupric molten iron separates with melting slag；It is the thin abrasive grit of cupric by the way that cupric molten iron is pelletized through atomization, can be notable
Increase the surface area of the thin abrasive grit of cupric, be advantageous to improve the efficiency of follow-up ammonia leaching processing and ammonia still process processing, improve the dissolving speed of copper
Rate, while save energy consumption；The thin abrasive grit of above-mentioned cupric is handled using ammoniacal liquor and carbon dioxide, because ammonia spirit is having dioxy
Cu oxide and metallic copper can be dissolved in the presence of change carbon (or ammonium carbonate), is obtained containing the cuprous cupric ammonia leaching solution of ammonium carbonate, and
Iron exists still in the form of metallic iron, so as to remove the copper in iron power removing；And ammonium carbonate is cuprous can be by oxygen in the presence of having air
Change, generate the ammonium carbonate salts of copper, and ammonium carbonate salts can further dissolve metallic copper, in this way, can be by the copper in the thin abrasive grit of cupric
Dissolving is abundant, and after ammonia still process is handled, ammonium carbonate is cuprous to react with oxygen, generation cupric oxide, ammonia and carbon dioxide, so as to
The recycling of copper is realized, and caused ammonia and carbon dioxide can be back to ammonia bath unit, advantageously reduce whole technique
The cost of raw material.Thus, this method by the mixed material containing metallurgical slag and reducing agent is reduced directly-it is molten get containing
Copper and iron water, then cupric molten iron is separated by copper, the iron for being atomized granulation with ammonia leaching is realized, and returned copper using ammonia still process method
Receive so that the rate of recovery of copper is not less than 98.5%, and TFe content is not less than 95.5wt% in iron powder, and Cu content is not more than
0.05wt%.
According to the method for the system Treatment of Copper molten iron of the Treatment of Copper molten iron of the utility model above-described embodiment, reference chart
4, this method further comprises：
S600：The ammonia that S500 is obtained is supplied into water absorption plant
In the step, the ammonia that S500 is obtained is supplied into water absorption plant, to obtain ammoniacal liquor, and ammoniacal liquor is returned
Ammonia bath unit into S200.Thus, ammonia caused by ammonia steaming device can fully be reclaimed, and can be by the ammoniacal liquor reuse of gained
In above-mentioned ammonia bath unit, the cost of raw material of whole system is advantageously reduced, reduces energy consumption, improves the economy of system.
Below with reference to specific embodiment, the utility model is described, it is necessary to which explanation is, these embodiments are only
Descriptive, without limiting the utility model in any way.
Embodiment 1
By certain domestic company's copper ashes with reduction coal, additive according to mass ratio 100：10：3 are mixed in batch mixer, its
In, TFe contains 35wt% in copper ashes, and Cu contains 0.15wt%, obtains mixed material；Then said mixture material is directly gone back
Former-molten office reason, obtains cupric 0.4wt%, iron content 90wt% cupric molten iron；Then 1450 degrees Celsius of cupric molten iron is sent
Atomization pelletization treatment is carried out to atomization granulation device, obtains the thin abrasive grit of cupric that particle diameter is less than 74 microns of accountings 86%；Then will
Above-mentioned cupric thin abrasive grit, ammoniacal liquor and carbon dioxide, which are delivered in stirred leaching tank, carries out ammonia leaching reaction, and ammonia leaching condition is：Ammoniacal liquor quality
Concentration is 1%, and carbon dioxide mass concentration is (with (NH4)2CO3Meter) it is 2%, liquid-solid ratio 10:1, ammonia leaching temperature is 40 Celsius
Degree, time 2h, after reaction terminates, separation of solid and liquid being carried out, obtains iron powder and cupric ammonia leaching solution, TFe contains 95.5wt% in iron powder,
Cu contains 0.05wt%, and iron powder can be as the steelmaking feed of Fine Steel Casting iron, and copper is mainly with Cu in cupric ammonia leaching solution2(NH3)4CO3
Form is present；Then above-mentioned cupric ammonia leaching solution and air are delivered into destilling tower and carry out distillation processing, obtain carbon dioxide, ammonia and
Cupric oxide, the grade of cupric oxide is 98%；Ammoniacal liquor finally is made through water absorption plant in the ammonia of gained, obtained by destilling tower
Carbon dioxide is back in stirred leaching tank and used as raw material together, and the rate of recovery of whole technique copper is up to 98.5%.
Embodiment 2
By certain domestic company's nickel slag with reduction coal, additive according to mass ratio 100：15：7 are mixed in batch mixer, its
In, TFe contains 40wt% in copper ashes, and Cu contains 0.30wt%, obtains mixed material；Then said mixture material is directly gone back
Former-molten office reason, obtains cupric 0.6wt%, iron content 92wt% cupric molten iron；Then 1500 degrees Celsius of cupric molten iron is sent
Atomization pelletization treatment is carried out to atomization granulation device, obtains the thin abrasive grit of cupric that particle diameter is less than 74 microns of accountings 90%；Then will
Above-mentioned cupric thin abrasive grit, ammoniacal liquor and carbon dioxide, which are delivered in stirred leaching tank, carries out ammonia leaching reaction, and ammonia leaching condition is：Ammoniacal liquor quality
Concentration is 3%, and carbon dioxide mass concentration is (with (NH4)2CO3Meter) it is 4%, liquid-solid ratio 6:1, ammonia leaching temperature is 45 degrees Celsius,
Time is 1h, after reaction terminates, carries out separation of solid and liquid, obtains iron powder and cupric ammonia leaching solution, TFe contains 97.2wt%, Cu in iron powder
Containing 0.04wt%, iron powder can be as the steelmaking feed of Fine Steel Casting iron, and copper is mainly with Cu in cupric ammonia leaching solution2(NH3)4CO3Shape
Formula is present；Then above-mentioned cupric ammonia leaching solution and air are delivered into destilling tower and carries out distillation processing, obtain carbon dioxide, ammonia and oxygen
Change copper, the grade of cupric oxide is 98.5%；Ammoniacal liquor finally is made through water absorption plant in the ammonia of gained, obtained by destilling tower
Carbon dioxide is back in stirred leaching tank and used as raw material together, and the rate of recovery of whole technique copper is up to 99%.
Embodiment 3
By certain domestic company's copper ashes with reduction coal, additive according to mass ratio 100：20：15 are mixed, wherein, copper ashes
Middle TFe contains 45wt%, and Cu contains 0.55wt%, obtains mixed material；Then said mixture material is directly carried out reducing-melt office
Reason, obtains cupric 0.8wt%, iron content 99wt% cupric molten iron；Then 1525 degrees Celsius of cupric molten iron is delivered into atomization system
Grain device carries out atomization pelletization treatment, obtains the thin abrasive grit of cupric that particle diameter is less than 74 microns of accountings 95%；Then by above-mentioned cupric
Thin abrasive grit, ammoniacal liquor and carbon dioxide, which are delivered in stirred leaching tank, carries out ammonia leaching reaction, and ammonia leaching condition is：Ammoniacal liquor mass concentration is
6%, carbon dioxide mass concentration is (with (NH4)2CO3Meter) it is 5%, liquid-solid ratio 3:1, ammonia leaching temperature is 50 degrees Celsius, and the time is
30min, after reaction terminates, separation of solid and liquid is carried out, obtains iron powder and cupric ammonia leaching solution, TFe contains 98.2wt% in iron powder, and Cu contains
0.03wt%, iron powder can be as the steelmaking feeds of Fine Steel Casting iron, and copper is mainly with Cu in cupric ammonia leaching solution2(NH3)4CO3Form
In the presence of；Then above-mentioned cupric ammonia leaching solution and air are delivered into destilling tower and carries out distillation processing, obtain carbon dioxide, ammonia and oxidation
Copper, the grade of cupric oxide is 99%；Ammoniacal liquor finally is made through water absorption plant in the ammonia of gained, with the dioxy obtained by destilling tower
Change carbon to be back in stirred leaching tank and uses as raw material together, the rate of recovery of whole technique copper is up to 99.5%.
Embodiment 4
By certain domestic company's nickel slag with reduction coal, additive according to mass ratio 100：30：10 are mixed, wherein, copper ashes
Middle TFe contains 40wt%, and Cu contains 0.85wt%, obtains mixed material；Then said mixture material is directly carried out reducing-melt office
Reason, obtains cupric 1.0wt%, iron content 97wt% cupric molten iron；Then cupric molten iron is delivered into atomization granulation device and carries out mist
Change pelletization treatment, obtain the thin abrasive grit of cupric that particle diameter is less than 74 microns of accountings 100%；Then by the thin abrasive grit of above-mentioned cupric, ammoniacal liquor
Delivered to carbon dioxide in stirred leaching tank and carry out ammonia leaching reaction, ammonia leaching condition is：Ammoniacal liquor mass concentration is 10%, carbon dioxide
Mass concentration is (with (NH4)2CO3Meter) it is 6%, liquid-solid ratio 1:1, ammonia leaching temperature is 50 degrees Celsius, time 10min, reaction knot
Shu Hou, separation of solid and liquid is carried out, obtains iron powder and cupric ammonia leaching solution, TFe contains 99.6wt% in iron powder, and Cu contains 0.01wt%, iron powder
Can be as the steelmaking feed of Fine Steel Casting iron, copper is mainly with Cu in cupric ammonia leaching solution2(NH3)4CO3Form is present；Then will be upper
State cupric ammonia leaching solution and air delivers to destilling tower and carries out distillation processing, obtain carbon dioxide, ammonia and cupric oxide, the product of cupric oxide
Position is 99.5%；Ammoniacal liquor finally is made through water absorption plant in the ammonia of gained, is returned together with the carbon dioxide obtained by destilling tower
It is back in stirred leaching tank and is used as raw material, the rate of recovery of whole technique copper is up to 99.7%.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the present utility model.In this manual, to the schematic table of above-mentioned term
State and be necessarily directed to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be with
Combined in an appropriate manner in any one or more embodiments or example.In addition, in the case of not conflicting, this area
Technical staff the different embodiments or example and the feature of different embodiments or example described in this specification can be entered
Row combines and combination.
Although embodiment of the present utility model has been shown and described above, it is to be understood that above-described embodiment is
Exemplary, it is impossible to it is interpreted as to limitation of the present utility model, one of ordinary skill in the art is in the scope of the utility model
It is interior above-described embodiment to be changed, changed, replaced and modification.
Claims (4)
1. a kind of system for handling metallurgical slag, the metallurgical slag include at least one of copper ashes and nickel slag, it is characterised in that institute
The system of stating includes：
Mixing arrangement, the mixing arrangement have metallurgical slag entrance, reducing agent entrance, additive entrance and mixed material outlet；
Reduction-molten separating device, the reduction-molten separating device have mixed material entrance, the outlet of cupric molten iron and melting slag outlet,
The mixed material entrance is connected with mixed material outlet；
Granulation device is atomized, the atomization granulation device has cupric molten iron entrance and the thin abrasive grit outlet of cupric, described to contain copper and iron
Water inlet is connected with cupric molten iron outlet；
Ammonia bath unit, the ammonia bath unit have the thin abrasive grit entrance of cupric, ammonia inlet, carbon dioxide entrance, iron powder outlet and
Cupric ammonia leaching solution exports, and the thin abrasive grit entrance of the cupric abrasive grit outlet thin with the cupric is connected；
Ammonia steaming device, the ammonia steaming device have cupric ammonia leaching solution entrance, air intake, carbon dioxide outlet, ammonia outlet and
Cupric oxide exports, and the cupric ammonia leaching solution entrance and the cupric ammonia leaching solution, which export, to be connected, the carbon dioxide outlet with it is described
Carbon dioxide entrance is connected.
2. system according to claim 1, it is characterised in that further comprise：
Water absorption plant, the water absorption plant have ammonia entrance and ammoniacal liquor outlet, and the ammonia entrance goes out with the ammonia
Mouth is connected, and the ammoniacal liquor outlet is connected with the ammonia inlet.
3. system according to claim 1 or 2, it is characterised in that the ammonia bath unit is stirred leaching tank.
4. system according to claim 1 or 2, it is characterised in that the ammonia steaming device is destilling tower.
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| CN201720302119.3U CN206721313U (en) | 2017-03-24 | 2017-03-24 | The system for handling metallurgical slag |
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