CN206256125U - The processing system of iron vitriol slag - Google Patents
The processing system of iron vitriol slag Download PDFInfo
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- CN206256125U CN206256125U CN201621334452.4U CN201621334452U CN206256125U CN 206256125 U CN206256125 U CN 206256125U CN 201621334452 U CN201621334452 U CN 201621334452U CN 206256125 U CN206256125 U CN 206256125U
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Abstract
The utility model proposes the processing system of iron vitriol slag, including：There is first mixing arrangement, the first mixing arrangement iron vitriol slag entrance, reduction coal entrance and the first mixed material to export；There is first palletizing device, the first palletizing device the first mixed material entrance and iron vitriol slag mother bulb to export；There is second mixing arrangement, the second mixing arrangement reduction coal entrance, lime stone entrance, binding agent entrance and the second mixed material to export；There is second palletizing device, the second palletizing device iron vitriol slag mother bulb entrance, the second mixed material entrance and composite pellet to export；There is annular furnace, annular furnace composite pellet entrance and reduzate to export, and composite pellet entrance is connected with composite pellet outlet；And mill ore magnetic selection device, there is mill ore magnetic selection device reduzate entrance, metal iron powder outlet and mine tailing to export, and reduzate entrance and reduzate are exported and be connected.The volatilization of sulphur in ferrovanadium slag is effectively reduced using the processing system, desulphurization cost is reduced.
Description
Technical field
The utility model belongs to the energy and field of metallurgy, in particular to the processing system of iron vitriol slag.
Background technology
Iron vitriol slag belongs to a kind of leached mud produced in Zinc Hydrometallurgy Process, the technique that zinc abstraction is used be generally " roasting-
Leaching-purification-electrodeposition ", using hot acid leaching-ferrovanadium except iron treatment, other 55% for 45% middle phase analysis in zinc hydrometallurgy factory
Processed using rotary kiln baking.Iron vitriol slag belongs to " hot acid leaching-ferrovanadium is except iron treatment (precipitation) " precipitation in Zinc Hydrometallurgy Process
A kind of tailings produced in process, i.e., the formation precipitation of ferro element selectivity in zinc lixiviating solution, so as to reach iron and zinc
The purpose of separation.Its main component is ferrovanadium, and molecular formula can be written as NaFe3(SO4)2(OH)6, total sulphur content be more than 12%, crystallization
Water is up to 10%.This kind of Zinc hydrometallurgy process zinc leaching rate is higher than 98%, and technological equipment investment is small, but the siderotil that technique is produced
Contain more soluble sulphate and heavy metal ion in slag, also have dilute scattered noble metal and stored up, it is necessary to build antiseepage slag field, deposit
In very big Environmental security hidden danger.And because the decomposition temperature of siderotil is higher, the noble metal of preservation also cannot be by routine
Extract technology is reclaimed using floatation process, can not effectively extract iron in slag, zinc and other valuable noble metals.Therefore
Process the element such as iron, lead, zinc, silver in iron vitriol slag, and realize the innoxious of sulphur in slag, generally require using pyrogenic process or wet method
Reclaimed, wet processing has the intractable problem of spent acid waste liquid.Firing method process technological process is short, but due in slag sulphur contain
Amount is high, and pyrogenic attack desulphurization cost is huge, and lead zinc ash byproducts are few, deficiency in economic performance, therefore a large amount of slags are in and store up state.
Therefore, needing further improvement for the handling process of iron vitriol slag at present.
Utility model content
The utility model is intended at least solve to a certain extent one of technical problem in correlation technique.Therefore, this reality
It is the processing system for proposing iron vitriol slag with a new purpose, sulphur in ferrovanadium slag is effectively reduced using the processing system
Volatilization, reduce desulphurization cost.
According to one side of the present utility model, the utility model proposes a kind of processing system of iron vitriol slag, including：
First mixing arrangement, first mixing arrangement has iron vitriol slag entrance, reduction coal entrance and the first mixed material
Outlet；
There is first palletizing device, first palletizing device the first mixed material entrance and iron vitriol slag mother bulb to export, institute
The first mixed material entrance is stated to be connected with first mixed material outlet；
Second mixing arrangement, second mixing arrangement has reduction coal entrance, lime stone entrance, binding agent entrance and
Two mixed materials are exported；
Second palletizing device, second palletizing device has iron vitriol slag mother bulb entrance, the second mixed material entrance and answers
Close pelletizing outlet, the outlet of the iron vitriol slag mother bulb entrance and the iron vitriol slag mother bulb is connected, the second mixed material entrance and
The second mixed material outlet is connected；
Annular furnace, the annular furnace has composite pellet entrance and reduzate outlet, the composite pellet entrance and institute
Composite pellet outlet is stated to be connected；And
There is mill ore magnetic selection device, the mill ore magnetic selection device reduzate entrance, metal iron powder outlet and mine tailing to export,
The reduzate entrance is connected with reduzate outlet.
Thus, the processing system of the iron vitriol slag of the utility model above-described embodiment, first with the first palletizing device by iron
Alum slag and reduction coal are prepared into iron vitriol slag mother bulb, recycle the second palletizing device in the outer layer covers reduction coal of iron vitriol slag mother bulb and
The mixture layer of lime stone.Secondly the composite pellet with iron vitriol slag mother bulb as core is carried out at direct-reduction in annular furnace
Reason.Thus the mixture layer of the reduction coal of the outer surface of iron vitriol slag mother bulb and lime stone, in can effectively preventing iron vitriol slag mother bulb
The effusion of oxysulfide, and oxysulfide can generate calcium sulfate or vulcanization calcium substance with lime stone reaction, and sulphur is fixed on
In metallized pellet.It is possible thereby to efficiently reduce the volatilization of sulphur in iron vitriol slag mother bulb, flue gas desulfurization cost is reduced.
In the utility model, the thermal source in the annular furnace is gas fired radiant tubes.
In the utility model, the gas fired radiant tubes is regenerative gas radiant tube.
Brief description of the drawings
Fig. 1 is the structural representation of the processing system of the iron vitriol slag according to the utility model one embodiment.
Fig. 2 is the flow chart of the processing method of the iron vitriol slag according to the utility model one embodiment.
Fig. 3 is the flow chart of the processing method of the iron vitriol slag according to the utility model another embodiment.
Specific embodiment
Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein ad initio
Same or similar element or element with same or like function are represented to same or similar label eventually.Below by ginseng
The embodiment for examining Description of Drawings is exemplary, it is intended to for explaining the utility model, and it is not intended that to the utility model
Limitation.
According to one side of the present utility model, the utility model proposes the processing system of iron vitriol slag.According to this practicality
New specific embodiment, describes the processing system of iron vitriol slag in detail below with reference to Fig. 1.
According to specific embodiment of the utility model, the system includes：First mixing arrangement 10, the first palletizing device 20,
Second mixing arrangement 30, the second palletizing device 40, annular furnace 50, mill ore magnetic selection device 60.
Wherein, the first mixing arrangement 10 has iron vitriol slag entrance 11, the mixed material of reduction coal entrance 12 and first outlet 13；
First palletizing device 20 has the first mixed material entrance 21 and an iron vitriol slag mother bulb outlet 22, the first mixed material entrance 21 and the
One mixed material outlet 13 is connected；Second mixing arrangement 30 has reduction coal entrance 31, lime stone entrance 32, binding agent entrance 33
With the second mixed material outlet 34；Second palletizing device 40 has iron vitriol slag mother bulb entrance 41, the and of the second mixed material entrance 42
Composite pellet outlet 43, iron vitriol slag mother bulb entrance 41 and iron vitriol slag mother bulb export 22 and are connected, the second mixed material entrance 42 and the
Two mixed materials outlet 34 is connected；Annular furnace 50 has composite pellet entrance 51 and reduzate outlet 52, composite pellet entrance
51 are connected with composite pellet outlet 43；And there is mill ore magnetic selection device 60 reduzate entrance 61, metal iron powder to export 62 and
Mine tailing outlet 63, reduzate entrance 61 is connected with reduzate outlet 52.
Thus, the processing system of the iron vitriol slag of the utility model above-described embodiment, first with the first palletizing device by iron
Alum slag and reduction coal are prepared into iron vitriol slag mother bulb, recycle the second palletizing device in the outer layer covers reduction coal of iron vitriol slag mother bulb and
The mixture layer of lime stone.Secondly the composite pellet with iron vitriol slag mother bulb as core is carried out at direct-reduction in annular furnace
Reason.Thus the mixture layer of the reduction coal of the outer surface of iron vitriol slag mother bulb and lime stone, in can effectively preventing iron vitriol slag mother bulb
The effusion of oxysulfide, and oxysulfide can generate calcium sulfate or vulcanization calcium substance with lime stone reaction, and sulphur is fixed on
In metallized pellet.It is possible thereby to efficiently reduce the volatilization of sulphur in iron vitriol slag mother bulb, desulphurization cost is reduced.
Describe the processing system of the iron vitriol slag of the utility model specific embodiment in detail below with reference to Fig. 1-3, and specifically retouch
State the method that iron vitriol slag is processed using the system.
S100：First mixing
According to specific embodiment of the utility model, the first mixing arrangement 10 has iron vitriol slag entrance 11, reduction coal entrance
12 and first mixed material outlet 13.Iron vitriol slag and reduction coal are carried out the first mixing by this in the first mixing arrangement 10, so as to
Obtain the first mixed material.
According to specific embodiment of the utility model, ferrovanadium slag is hot acid extract technology leached mud, and wherein sulfur content is
13%, lead content is 2%, and Zn content is 4%, and iron content is 23%.According to specific example of the present utility model, the grain of ferrovanadium slag
Spend for -325 mesh account for more than 95%.
S200：The treatment of first pelletizing
According to specific embodiment of the utility model, the first palletizing device 20 has the first mixed material entrance 21 and siderotil
Slag mother bulb outlet 22, the first mixed material entrance 21 is connected with the first mixed material outlet 13.Thus by first mixture
Material carries out the first pelletizing treatment in the first palletizing device 20, to obtain iron vitriol slag mother bulb；
According to specific embodiment of the utility model, the carbon-to-oxygen ratio of iron vitriol slag mother bulb is 1.0-1.6.Inventor's discovery, iron
The too low reduction for being unfavorable for lead, zinc, iron of carbon-to-oxygen ratio of alum slag mother bulb.From there through the carbon-to-oxygen ratio of control iron vitriol slag mother bulb, can be with
Lead, zinc, the reduction of iron in iron vitriol slag mother bulb is effectively ensured.
According to specific embodiment of the utility model, the particle diameter of iron vitriol slag mother bulb is 8-12mm.Inventor has found, if mother bulb
Particle diameter is too small, is unfavorable for improve production efficiency, if the quality of the excessive contained element sulphur of particle diameter is excessive, it is necessary to be entrained into more in outer layer
Many reduction coals and the mixture of lime stone, are unfavorable for the carrying out of reduction reaction and the fixation of element sulphur.
S300：Second mixing
According to specific embodiment of the utility model, the second mixing arrangement 30 has reduction coal entrance 31, lime stone entrance
32nd, the mixed material of binding agent entrance 33 and second outlet 34.Thus by reduction coal, lime stone and binding agent in the second mixing arrangement
The second mixing is carried out in 30, to obtain the second mixed material.Thus it is easy to further be processed in iron vitriol slag by the second pelletizing
Outer surface parcel reduction coal and the lime stone of mother bulb.And then can effectively reduce the sulphur volatility in iron vitriol slag mother bulb.
According to specific embodiment of the utility model, by reduction coal, the lime stone and the binding agent according to mass ratio
It is 100：40-60：4-6 carries out second mixing.According to specific example of the present utility model, the granularity of reduction coal can be
Between 100~200 mesh, the granularity of lime stone can be for below 200 mesh.Reduction coal and lime stone are mixed according to aforementioned proportion
Close, can effectively prevent the effusion of iron vitriol slag mother bulb sulphur oxide, and oxysulfide can be with lime stone reaction generation sulfuric acid
Calcium or vulcanization calcium substance, sulphur is fixed in metallized pellet.It is possible thereby to the sulphur volatilization being effectively reduced in iron vitriol slag mother bulb
Rate.The adding proportion of above-mentioned binding agent can ensure the intensity of pelletizing shell, prevent pelletizing shell from bursting.
S400：The treatment of second pelletizing
According to specific embodiment of the utility model, the second palletizing device 40 is mixed with iron vitriol slag mother bulb entrance 41, second
Material inlet 42 and composite pellet outlet 43 are closed, iron vitriol slag mother bulb entrance 41 is connected with iron vitriol slag mother bulb outlet 22, the second mixing
Material inlet 42 is connected with the second mixed material outlet 34.Thus by the iron vitriol slag mother bulb with second mixed material
The second pelletizing treatment is carried out in two palletizing devices 40, to make second mixed material wrap the iron vitriol slag mother bulb
Wrap up in, obtain the composite pellet with the iron vitriol slag mother bulb as core.
According to specific embodiment of the utility model, processed by above-mentioned second pelletizing, in the outer surface of iron vitriol slag mother bulb
The mixture of one layer of reduction coal of parcel and lime stone, and then the effusion of iron vitriol slag mother bulb sulphur oxide can be effectively prevented, and
Can be fixed on sulphur in metallized pellet with lime stone reaction generation calcium sulfate or vulcanization calcium substance by oxysulfide.Thus may be used
To be effectively reduced the sulphur volatility in iron vitriol slag mother bulb.
According to specific embodiment of the utility model, the particle diameter of iron vitriol slag mother bulb is 8-12mm, and the particle diameter of composite pellet is
10-16mm.The thickness of the second mixed material parcel iron vitriol slag mother bulb is not less than 2mm.
According to specific embodiment of the utility model, the carbon-to-oxygen ratio of composite pellet is 2.0-2.6.Inventor's discovery, carbon oxygen
Than too low, the reducing atmosphere around pelletizing is poor, is unfavorable for the reduction of iron lead zinc oxide in pelletizing, and carbon-to-oxygen ratio is too high, ball
Group's intensity is poor, and cost increases.
S500：Direct-reduction treatment in annular furnace
According to specific embodiment of the utility model, there is annular furnace 50 composite pellet entrance 51 and reduzate to export
52, composite pellet entrance 51 is connected with composite pellet outlet 43.Thus the composite pellet is delivered in annular furnace in annular furnace
Direct-reduction treatment is carried out in 50, to obtain reduzate.
According to specific embodiment of the utility model, the thermal source of annular furnace is gas fired radiant tubes.Gas fired radiant tubes is with hot spoke
The mode penetrated provides volatilization, decomposition, reduces required heat.Accurate furnace temperature can control using regenerative gas radiant tube, and
Reducing agent pyrolysis produces CO gases in preventing pelletizing integument, and stronger reducing atmosphere is kept in pelletizing surface and burner hearth, and then
Sulphur volatilization is effectively reduced, increases sulfur-fixing rate.According to specific embodiment of the utility model, the preferred regenerative gas of gas fired radiant tubes
Radiant tube.It is possible thereby to further save energy consumption.
According to specific embodiment of the utility model, to composite pellet be reduced directly the temperature for the treatment of in annular furnace
It can be 1000~1200 DEG C.Thus using carbonaceous material autoreduction react, by lead, zinc oxide in slag be reduced into lead,
Zinc simple substance, is volatized into that (flue can be separately provided in reducing zone) in flue, is oxidized to lead oxide and oxygen again in flue
Change zinc be in high temperature dust flue dust in, by heat exchanger, mix cold wind be reduced to 250 DEG C enter bagrooms reclaim oxide powder and zincs
Dirt, temperature is too low, it is impossible to realize the reduction of lead zinc, ferriferous oxide.In addition, inventor also found, if direct reduction reactor
Temperature is too high, then be easy to cause the decomposition of oxysulfide and lime stone reaction generation calcium sulfate, escapes sulphur oxide gas, instead
And reduce sulfur-fixing rate.
Further, the time of direct-reduction treatment can be 60~120min in annular furnace.Inventor has found, if also
The former time is too short, and iron percent reduction is low, lead, Zinc volatilization rate are relatively low；If the recovery time is long, the scaling loss of carbon is increased, and is unfavorable for protecting
Reducing atmosphere around holding group.
According to specific embodiment of the utility model, by the pelletizing behind annular furnace reducing zone via the discharging in discharge zone
Device discharges out of the furnace, after reduction in product metal ball content of Pb＆Zn be less than 0.1%, sulfur-fixing rate be more than 90%, sulfur-fixing rate=
[(sulphur percentage composition in metallized pellet weight * metallized pellets)/(sulphur percentage composition in green pellets weight * green pellets)] *
100, the material after reduction can send to slag sluicing system system and obtain iron product and slag.
S600：Ball milling and magnetic separation are processed
According to specific embodiment of the utility model, mill ore magnetic selection device 60 has reduzate entrance 61, metal iron powder
Outlet 62 and mine tailing outlet 63, reduzate entrance 61 are connected with reduzate outlet 52.Thus by the reduzate in mill
Ball milling and magnetic separation treatment are carried out in ore deposit concentration equipment 60, to obtain metal iron powder and mine tailing.
Embodiment 1
(1) iron vitriol slag (S contents are 13%, Zn content 4%, lead content 2%) is mixed, mixed proportion with reduction coal
It is 100:15, carbon-to-oxygen ratio is 1.2, and the first mixed material is carried out into pelletizing, obtains iron vitriol slag mother bulb, the pelletizing grade 8~
In the range of 12mm, underproof pelletizing returns to damp mill after screening, reenters the charging zone of the first pelletizing operation.Will reduction
Coal, lime stone, binding agent are according to 100：40：5 are mixed, with iron vitriol slag mother bulb as mother bulb after mixing, into the second pelletizing work
Sequence, iron vitriol slag mother bulb surface is uniformly wrapped in by the second mixed material, obtains composite pellet, the granularity of composite pellet for 10~
16mm, carbon-to-oxygen ratio is 2.0~2.2.
(2) composite pellet is uniformly distributed into radiant tube annular furnace and is reduced directly, be respectively in annular furnace and fed
Area, reducing zone and discharge zone, the temperature in reducing zone is 1100 DEG C, and the recovery time is 90min, and lead, zinc sulfate further divide
It is lead oxide, zinc oxide to solve, and oxide is reduced to simple substance zinc, elementary lead, is oxidized to lead oxide and oxygen again in flue
Change zinc, ash-laden gas by heat exchanger, mix cold wind be reduced to 250 DEG C enter bagrooms reclaim zinc oxide dusts.
(3) reduction terminates rear pelletizing and is discharged out of the furnace through drawing mechanism, and Pb, Zn content is less than 0.08% in reducing material, Gu sulphur
Rate is 85~90%.
(4) metallized pellet obtains metal iron powder and mine tailing after mill ore magnetic selection, sulfur content in metal iron powder<0.1%.
Embodiment 2
(1) iron vitriol slag (S contents are 13%, Zn content 4%, lead content 2%) is mixed, mixed proportion with reduction coal
It is 100:15, carbon-to-oxygen ratio is 1.4, and the first mixed material is carried out into pelletizing, obtains iron vitriol slag mother bulb, the pelletizing grade 8~
In the range of 12mm, underproof pelletizing returns to damp mill after screening, reenters the charging zone of the first pelletizing operation.Will reduction
Coal, lime stone, binding agent are according to 100：50：5 are mixed, with iron vitriol slag mother bulb as mother bulb after mixing, into the second pelletizing work
Sequence, iron vitriol slag mother bulb surface is uniformly wrapped in by the second mixed material, obtains composite pellet, the granularity of composite pellet for 10~
16mm, carbon-to-oxygen ratio is 2.0~2.2.
(2) composite pellet is uniformly distributed into radiant tube annular furnace and is reduced directly, be respectively in annular furnace and fed
Area, reducing zone and discharge zone, the temperature in reducing zone is 1100 DEG C, and the recovery time is 90min, and lead, zinc sulfate further divide
It is lead oxide, zinc oxide to solve, and oxide is reduced to simple substance zinc, elementary lead, is oxidized to lead oxide and oxygen again in flue
Change zinc, ash-laden gas by heat exchanger, mix cold wind be reduced to 250 DEG C enter bagrooms reclaim zinc oxide dusts.
(3) reduction terminates rear pelletizing and is discharged out of the furnace through drawing mechanism, and Pb, Zn content is less than 0.05% in reducing material, Gu sulphur
Rate is 88~92%.
(4) metallized pellet obtains metal iron powder and mine tailing after mill ore magnetic selection, sulfur content in metal iron powder<0.1%.
Embodiment 3
(1) iron vitriol slag (S contents are 13%, Zn content 4%, lead content 2%) is mixed, mixed proportion with reduction coal
It is 100:18, carbon-to-oxygen ratio is 1.6, and the first mixed material is carried out into pelletizing, obtains iron vitriol slag mother bulb, the pelletizing grade 8~
In the range of 12mm, underproof pelletizing returns to damp mill after screening, reenters the charging zone of the first pelletizing operation.Will reduction
Coal, lime stone, binding agent are according to 100：60：5 are mixed, with iron vitriol slag mother bulb as mother bulb after mixing, into the second pelletizing work
Sequence, iron vitriol slag mother bulb surface is uniformly wrapped in by the second mixed material, obtains composite pellet, the granularity of composite pellet for 10~
16mm, carbon-to-oxygen ratio is 2.2~2.4.
(2) composite pellet is uniformly distributed into radiant tube annular furnace and is reduced directly, be respectively in annular furnace and fed
Area, reducing zone and discharge zone, the temperature in reducing zone is 1150 DEG C, and the recovery time is 60min, and lead, zinc sulfate further divide
It is lead oxide, zinc oxide to solve, and oxide is reduced to simple substance zinc, elementary lead, is oxidized to lead oxide and oxygen again in flue
Change zinc, ash-laden gas by heat exchanger, mix cold wind be reduced to 250 DEG C enter bagrooms reclaim zinc oxide dusts.
(3) reduction terminates rear pelletizing and is discharged out of the furnace through drawing mechanism, and Pb, Zn content is less than 0.03% in pelletizing after reduction, Gu
Sulphur rate is 92~94%.
(4) metallized pellet obtains metal iron powder and mine tailing after mill ore magnetic selection, sulfur content in metal iron powder<0.1%.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or spy that the embodiment or example are described
Point is contained at least one embodiment of the present utility model or example.In this manual, to the schematic table of above-mentioned term
Stating need not be directed to identical embodiment or example.And, the specific features of description, structure, material or feature can be
Combined in an appropriate manner in any one or more embodiments or example.Additionally, in the case of not conflicting, this area
Technical staff can be carried out the feature of the different embodiments or example described in this specification and different embodiments or example
With reference to 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 scope of the present utility model
It is interior above-described embodiment to be changed, changed, replaced and modification.
Claims (3)
1. a kind of processing system of iron vitriol slag, it is characterised in that including：
There is first mixing arrangement, first mixing arrangement iron vitriol slag entrance, reduction coal entrance and the first mixed material to export；
There is first palletizing device, first palletizing device the first mixed material entrance and iron vitriol slag mother bulb to export, and described the
One mixed material entrance is connected with first mixed material outlet；
Second mixing arrangement, second mixing arrangement has reduction coal entrance, lime stone entrance, binding agent entrance and second mixed
Close material outlet；
Second palletizing device, second palletizing device has iron vitriol slag mother bulb entrance, the second mixed material entrance and composite balls
Group's outlet, the iron vitriol slag mother bulb entrance and the iron vitriol slag mother bulb outlet is connected, the second mixed material entrance with it is described
The outlet of second mixed material is connected；
There is annular furnace, the annular furnace composite pellet entrance and reduzate to export, and the composite pellet entrance is multiple with described
Pelletizing outlet is closed to be connected；And
There is mill ore magnetic selection device, the mill ore magnetic selection device reduzate entrance, metal iron powder outlet and mine tailing to export, described
Reduzate entrance is connected with reduzate outlet.
2. the processing system of iron vitriol slag according to claim 1, it is characterised in that the thermal source in the annular furnace is combustion gas
Radiant tube.
3. the processing system of iron vitriol slag according to claim 2, it is characterised in that the gas fired radiant tubes is heat accumulating type combustion
Gas radiant tube.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106676221A (en) * | 2016-12-06 | 2017-05-17 | 江苏省冶金设计院有限公司 | Jarosite slag treatment method and system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106676221A (en) * | 2016-12-06 | 2017-05-17 | 江苏省冶金设计院有限公司 | Jarosite slag treatment method and system |
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