CN106086438A - Process the method and system of iron vitriol slag - Google Patents
Process the method and system of iron vitriol slag Download PDFInfo
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- CN106086438A CN106086438A CN201610622745.0A CN201610622745A CN106086438A CN 106086438 A CN106086438 A CN 106086438A CN 201610622745 A CN201610622745 A CN 201610622745A CN 106086438 A CN106086438 A CN 106086438A
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- Prior art keywords
- vitriol slag
- iron vitriol
- iron
- silver
- zinc
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/04—Working-up slag
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/008—Use of special additives or fluxing agents
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/08—Making spongy iron or liquid steel, by direct processes in rotary furnaces
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/10—Dry methods smelting of sulfides or formation of mattes by solid carbonaceous reducing agents
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/16—Dry methods smelting of sulfides or formation of mattes with volatilisation or condensation of the metal being produced
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/001—Dry processes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses the method and system processing iron vitriol slag, the method includes: iron vitriol slag is carried out drying and processing by (1)；(2) iron vitriol slag siccative is mixed with coal dust, obtain mixed material；(3) by the feed zone of mixed material supply to rotary hearth furnace, make mixed material sequentially pass through the preheating zone of rotary hearth furnace, middle warm area and high-temperature region and carry out decomposition-reduction, and middle warm area and high-temperature region are respectively provided with burner, obtaining the metallization material of the flue dust containing silver oxide, lead oxide and zinc oxide and molten condition, the metallization material of molten condition is discharged by spiral scraper after the water cooling plant that discharge zone is arranged；(4) metallization material is carried out mill ore magnetic selection process, obtain metal iron powder and tailings.The method not only solves iron vitriol slag bulk deposition and pollutes the problem of environment, and achieves the effective recycling of the valuable metals such as the ferrum lead zinc-silver in iron vitriol slag, and the extrusion rate of lead zinc-silver is more than 95%, and the response rate of ferrum reaches more than 85%.
Description
Technical field
The invention belongs to metallurgical technology field, specifically, the present invention relates to a kind of method and system processing iron vitriol slag.
Background technology
It is main that China's zinc abstraction Technology is smelted in a wet process.By the difference of leachate deferrization process, goethitum can be divided into
Method, hematite process and jarosite process etc..Wherein, jarosite process due to easy Precipitation, dissolubility is low, filterability good, examination
Agent consumes few and production cost is low and most widely used.Being sunk vitriol operation by jarosite process is exactly the ferrum element in zinc infusion solution
It is formed selectively precipitation, thus reaches the final purpose that ferrum separates with zinc.But except forming siderotil during heavy vitriol, also
The valuable metals such as the zinc of some, lead, silver enter iron vitriol slag with the form of silicate and sulfate together with siderotil.Based on Huang
The advantage of krausite method technique, in Zinc hydrometallurgy process, the whole nation has the yield of 45% to be smelted by this technique, but
It is that the siderotil amount that hot acid-jarosite process product removes is big, it is big to pollute.At present the siderotil quantity of slag is stored up more than 30,000,000 tons by China, and
Every year by with the speed increment of 1,000,000 tons, environment is produced huge potential pollution；Metal loss is big simultaneously, if iron vitriol slag
Calculating containing zinc 5% by average, accumulation zinc amount of metal is more than 1,500,000 tons, and value is the highest.Based on above 2 points, to iron vitriol slag
Further investigation, turns waste into wealth, is significant.
Process to iron vitriol slag at present mainly uses high temperature reduction volatility process and aqueous solution solvent extraction method.High temperature reduction volatility process
It is in iron vitriol slag, to allocate coke powder into as reducing agent, rotary kiln or fuming furnace carries out high-temperature roasting or melting, has made
The reduction volatilizations such as valency metallic lead, zinc, silver, indium.Aqueous solution leaching method have two types, one be directly by sour for iron vitriol slag or
Alkali leaches；The second is that the slag after calcination uses acid or alkali again by iron vitriol slag calcination in advance between 500-700 DEG C
Solution leaches the metal in iron vitriol slag.The advantage of high temperature reduction volatility process is can to reclaim lead in vitriol slag, zinc, indium etc. simultaneously,
These elements are all collected to zinc oxide fumes, but the method energy consumption are high, and output containing scum due to volatilization zinc mistake
In melt state in journey, melt is mixed into a large amount of silicate, causes containing the yield of ferrum in scum relatively low.Aqueous solution solvent extraction method excellent
Gesture be after leaching containing scum in the content of ferrum reach about 55%, but in slag, Zn content is higher, Zn content generally 1% with
On, because this part zinc mainly exists with zinc ferrite form, when ferrum uses as iron-smelting raw material, ironmaking processes can be caused by zinc
Adverse effect.
Therefore, the technology of existing process iron vitriol slag is further improved.
Summary of the invention
It is contemplated that one of technical problem solved the most to a certain extent in correlation technique.To this end, the present invention
One purpose is to propose a kind of method and system processing iron vitriol slag, and the method not only solves iron vitriol slag bulk deposition and pollutes
The problem of environment, and achieve the effective recycling of the valuable metals such as the ferrum lead zinc-silver in iron vitriol slag, and lead zinc-silver
Extrusion rate is more than 95%, and the response rate of ferrum reaches more than 85%.
In one aspect of the invention, the present invention proposes a kind of method processing iron vitriol slag.Enforcement according to the present invention
Example, the method includes:
(1) iron vitriol slag is carried out drying and processing, in order to obtain iron vitriol slag siccative；
(2) described iron vitriol slag siccative is mixed with coal dust, in order to obtain mixed material；
(3) by the feed zone of described mixed material supply to rotary hearth furnace so that described mixed material sequentially passes through described turning
The preheating zone of end stove, middle warm area and high-temperature region carry out decomposition-reduction, and described middle warm area and described high-temperature region are respectively provided with burning
Mouth, obtains the metallization material of the flue dust containing silver oxide, lead oxide and zinc oxide and molten condition, described molten condition
Metallization material is discharged by spiral scraper after the water cooling plant that discharge zone is arranged；
(4) the metallization material that described discharge zone is discharged is carried out mill ore magnetic selection process, in order to obtain metal iron powder and tail
Slag.
Thus, the method processing iron vitriol slag according to embodiments of the present invention by mixing supply by iron vitriol slag siccative with coal dust
Carrying out decomposition-reduction process to rotary hearth furnace, in the preheating zone of rotary hearth furnace, siderotil is decomposed and the preliminary reduction of zinc ferrite,
And along with removing and the evaporation of bed of material moisture of this water of crystallization, so that the mixing bed of material forms loose porous knot
Structure, and these loose structures improve the dynamic conditions in course of reaction, are conducive to rotary hearth furnace strongly reducing atmosphere at middle warm area
Middle carbon monoxide enters inside the bed of material, thus not only improves the reduction efficiency of ferrum lead silver zinc, and improves the volatilization of lead zinc-silver
Efficiency (extrusion rate of lead zinc-silver is more than 95%), realizes the drastic reduction of iron oxides simultaneously, is metallized in high-temperature region
Rate reaches the metallization material of more than 88%, and by arranging water cooling plant in discharge zone to the molten obtained by high-temperature region
The metallization material of state carries out cooling process, and the metallization material of molten state can be avoided to glue with rotary furnace bottom refractory material
Knot, thus ensure the smooth discharging of metal compound material, and then (Iron grade reaches to get final product isolated metal iron powder through mill ore magnetic selection
More than 88%), compared with the high temperature reduction volatility process used in prior art, the application can significantly drop by using rotary hearth furnace
Low energy consumption, and iron recovery is up to more than 85%.Thus, the present processes is used to not only solve iron vitriol slag bulk deposition
The problem polluting environment, and achieve the effective recycling of the valuable metals such as the ferrum lead zinc-silver in iron vitriol slag.
It addition, the method for process iron vitriol slag according to the above embodiment of the present invention can also have following additional technology spy
Levy:
In some embodiments of the invention, in step (1), the water content in described iron vitriol slag siccative be 5～
10wt%.Thus, it is possible to significantly improve the organic efficiency of ferrum lead silver zinc.
In some embodiments of the invention, in step (2), by described coal dust with described iron vitriol slag siccative according to carbon oxygen
Than being 1.6～2.0 to mix.Thus, it is possible to improve the organic efficiency of ferrum lead silver zinc further.
In some embodiments of the invention, in step (2), the particle diameter of described coal dust is 0.5～1mm.Thus, it is possible to
Improve the organic efficiency of ferrum lead silver zinc further.
In some embodiments of the invention, in step (3), in described feed zone, the thickness of feed layer of mixed material is 40
～65mm.Thus, it is possible to improve the organic efficiency of ferrum lead silver zinc further.
In some embodiments of the invention, in step (3), the temperature of described middle warm area is 900～1000 degrees Celsius,
The temperature of described high-temperature region is 1100～1250 degrees Celsius.Thus, it is possible to improve the organic efficiency of ferrum lead silver zinc further.
In some embodiments of the invention, in step (3), the metallization material of described molten condition sets through discharge zone
Temperature after the water cooling plant put is 900～1000 degrees Celsius.Thus, it is possible to ensure the gained metallization smooth discharging of material.
In another aspect of the invention, the present invention proposes the system of a kind of method implementing above-mentioned process iron vitriol slag.
According to embodiments of the invention, this system includes:
Drying unit, described drying unit has iron vitriol slag entrance and iron vitriol slag drier outlet；
Mixing arrangement, described mixing arrangement has iron vitriol slag siccative entrance, coal powder entrance and mixed material outlet, described ferrum
Vitriol slag siccative entrance is connected with described iron vitriol slag drier outlet；
Rotary hearth furnace, described rotary hearth furnace sequentially forms feed zone, preheating zone, middle warm area, high-temperature region along furnace bottom rotation direction
And discharge zone, described feed zone is provided with mixed material entrance, and described middle warm area is provided with flue dust outlet, described middle warm area and institute
Stating high-temperature region and be respectively arranged with burner, described discharge zone is provided with water cooling plant, metallization material outlet and spiral scraper, institute
State mixed material entrance to be connected with the outlet of described mixed material；
Mill ore magnetic selection device, described mill ore magnetic selection device has metallization material inlet, metal iron powder outlet and tailings and goes out
Mouthful, described metallization material inlet is connected with described metallization material outlet.
Thus, the system processing iron vitriol slag according to embodiments of the present invention by mixing supply by iron vitriol slag siccative with coal dust
Carrying out decomposition-reduction process to rotary hearth furnace, in the preheating zone of rotary hearth furnace, siderotil is decomposed and the preliminary reduction of zinc ferrite,
And along with removing and the evaporation of bed of material moisture of this water of crystallization, so that the mixing bed of material forms loose porous knot
Structure, and these loose structures improve the dynamic conditions in course of reaction, are conducive to rotary hearth furnace strongly reducing atmosphere at middle warm area
Middle carbon monoxide enters inside the bed of material, thus not only improves the reduction efficiency of ferrum lead silver zinc, and improves the volatilization of lead zinc-silver
Efficiency (extrusion rate of lead zinc-silver is more than 95%), realizes the drastic reduction of iron oxides simultaneously, is metallized in high-temperature region
Rate reaches the metallization material of more than 88%, and by arranging water cooling plant in discharge zone to the molten obtained by high-temperature region
The metallization material of state carries out cooling process, and the metallization material of molten state can be avoided to glue with rotary furnace bottom refractory material
Knot, thus ensure the smooth discharging of metal compound material, and then (Iron grade reaches to get final product isolated metal iron powder through mill ore magnetic selection
More than 88%), compared with the high temperature reduction volatility process used in prior art, the application can significantly drop by using rotary hearth furnace
Low energy consumption, and iron recovery is up to more than 85%.Thus, the system of the application is used to not only solve iron vitriol slag bulk deposition
The problem polluting environment, and achieve the effective recycling of the valuable metals such as the ferrum lead zinc-silver in iron vitriol slag.
In some embodiments of the invention, described mixing arrangement is spiral distributor.
The additional aspect of the present invention and advantage will part be given in the following description, and part will become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or the additional aspect of the present invention and advantage are from combining the accompanying drawings below description to embodiment and will become
Substantially with easy to understand, wherein:
Fig. 1 is the method flow schematic diagram processing iron vitriol slag according to an embodiment of the invention；
Fig. 2 is the system structure schematic diagram processing iron vitriol slag according to an embodiment of the invention；
Fig. 3 is according to the plan structure signal of rotary hearth furnace in the system processing iron vitriol slag of further embodiment of the present invention
Figure.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, the most from start to finish
Same or similar label represents same or similar element or has the element of same or like function.Below with reference to attached
The embodiment that figure describes is exemplary, it is intended to is used for explaining the present invention, and is not considered as limiting the invention.
In describing the invention, it is to be understood that term " " center ", " longitudinally ", " laterally ", " length ", " width ",
" thickness ", " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end ", " interior ", " outward ", " up time
Pin ", " counterclockwise ", " axially ", " radially ", the orientation of the instruction such as " circumferential " or position relationship be based on orientation shown in the drawings or
Position relationship, is for only for ease of the description present invention and simplifies description rather than instruction or imply that the device of indication or element must
Must have specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.
In the present invention, unless otherwise clearly defined and limited, term " install ", " being connected ", " connection ", " fixing " etc.
Term should be interpreted broadly, and connects for example, it may be fixing, it is also possible to be to removably connect, or integral；Can be that machinery connects
Connect, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, in can being two elements
The connection in portion or the interaction relationship of two elements, unless otherwise clear and definite restriction.For those of ordinary skill in the art
For, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In one aspect of the invention, the present invention proposes a kind of method processing iron vitriol slag.Enforcement according to the present invention
Example, the method includes: iron vitriol slag is carried out drying and processing by (1), in order to obtain iron vitriol slag siccative；(2) by described iron vitriol slag siccative
Mix with coal dust, in order to obtain mixed material；(3) by the feed zone of described mixed material supply to rotary hearth furnace so that institute
State mixed material to sequentially pass through the preheating zone of described rotary hearth furnace, middle warm area and high-temperature region and carry out decomposition-reduction, and described middle temperature
District and described high-temperature region are respectively provided with burner, obtain the flue dust containing silver oxide, lead oxide and zinc oxide and molten condition
Metallization material, the metallization material of described molten condition is discharged by spiral scraper after the water cooling plant that discharge zone is arranged；
(4) the metallization material that described discharge zone is discharged is carried out mill ore magnetic selection process, in order to obtain metal iron powder and tailings.Inventor
Find, to rotary hearth furnace, carry out decomposition-reduction process, in the preheating of rotary hearth furnace by iron vitriol slag siccative to be mixed supply with coal dust
District, siderotil decomposes and the preliminary reduction of zinc ferrite, and along with the removing of this water of crystallization and the steaming of bed of material moisture
Sending out, so that the mixing bed of material forms loose porous structure, and these loose structures improve the kinetics in course of reaction
Condition, in middle warm area is conducive to rotary hearth furnace strongly reducing atmosphere, carbon monoxide enters inside the bed of material, thus not only improves ferrum lead silver
The reduction efficiency of zinc, and improve the volatilization efficiency (extrusion rate of lead zinc-silver is more than 95%) of lead zinc-silver, simultaneously at high temperature
District realizes the drastic reduction of iron oxides, obtains degree of metalization and reaches the metallization material of more than 88%, and by discharging
District arranges water cooling plant and the metallization material of the molten condition obtained by high-temperature region is carried out cooling process, can avoid molten state
Metallization material and rotary furnace bottom refractory material bond, thus ensure the smooth discharging of metal compound material, and then through ore grinding
Magnetic separation gets final product the high temperature reduction volatility process used in isolated metal iron powder (Iron grade reaches more than 88%), with prior art
Comparing, the application is by using rotary hearth furnace can significantly reduce energy consumption, and iron recovery is up to more than 85%.Thus, use
The present processes not only solves iron vitriol slag bulk deposition and pollutes the problem of environment, and achieves the ferrum lead zinc in iron vitriol slag
The effective recycling of the valuable metals such as silver.
The method that the embodiment of the present invention processes iron vitriol slag below with reference to Fig. 1 is described in detail.According to the present invention's
Embodiment, the method includes:
S100: iron vitriol slag is carried out drying and processing
In this step, iron vitriol slag is carried out drying and processing, obtain iron vitriol slag siccative.Concrete, in iron vitriol slag containing 22～
The ferrum of 25%, and a large amount of valuable metals such as lead zinc-silver, have higher economic benefit.One according to the present invention is embodied as
Example, the water content in iron vitriol slag siccative can be 5～10wt%.Thus, it is possible not only to improve the reduction effect of follow-up ferrum lead zinc-silver
Rate, and can ensure that the preheating zone at rotary hearth furnace, mixing bed of material moisture evaporation so that the mixing bed of material forms loose porous knot
Structure, thus improve the volatility of lead zinc-silver.
S200: iron vitriol slag siccative is mixed with coal dust
In this step, iron vitriol slag siccative obtained above is mixed with coal dust, obtains mixed material.Concrete, can
To use spiral distributor to realize the mixing of iron vitriol slag siccative and coal dust.
According to one embodiment of present invention, iron vitriol slag siccative is not particularly restricted with the mixed proportion of coal dust, ability
Field technique personnel can select according to actual needs, and according to a specific embodiment of the present invention, coal dust is done with iron vitriol slag
Material can be 1.6～2.0 to mix according to carbon-to-oxygen ratio.Inventor finds, if coal dust addition is the lowest, causes the reduction can not be thorough
The end, is carried out, thus reduces the response rate of ferrum lead zinc-silver, and if coal dust addition is the highest, carbon therein can not burn completely, causes
The product carbon content that reduction roasting terminates to obtain raises.
According to still a further embodiment, the particle diameter of coal dust is not particularly restricted, and those skilled in the art are permissible
Selecting according to actual needs, according to a specific embodiment of the present invention, the particle diameter of coal dust can be 0.5～1mm.Invention
People finds, if coal particle size is the thickest so that iron vitriol slag is insufficient contact with coal dust and affects sequential reduction effect, and if coal dust mistake
Carefully, in rotary hearth furnace, easy airborne dust, causes the loss of coal dust.
S300: by the feed zone of mixed material supply to rotary hearth furnace so that mixed material sequentially passes through the preheating of rotary hearth furnace
District, middle warm area and high-temperature region carry out decomposition-reduction
In this step, by the feed zone in mixed material obtained above supply to rotary hearth furnace, in iron vitriol slag, ferrum is mainly
With AFe3(SO4)2(OH)6Presented in, the one during wherein A is K, Na, having a small part is ZnFe2O form exists, and zinc removes
A small amount of exists with zinc ferrite form, and major part is presented in zinc sulfate and zinc silicate, and lead and silver is all with sulfate
Form exist, in preheating zone, due to middle warm area and the heat radiation of high-temperature region, siderotil can decompose in preheating zone generation water and
Fe2O3, and along with the removing of water of crystallization and the evaporation of moisture in the bed of material in iron vitriol slag, can also realize in preheating zone simultaneously
The preliminary reduction of zinc ferrite, along with the rotation of rotary hearth furnace, material runs to middle warm area (middle warm area is provided with burner), due in advance
Water of crystallization and the evaporation of table water in the compound of hot-zone cause the mixing bed of material to form loose porous structure, and these loose structures improve
Dynamic conditions in course of reaction, beneficially CO enters inside pelletizing in rotary hearth furnace strongly reducing atmosphere, is simultaneously also beneficial to
The volatilization of valuable metal lead zinc-silver, the compound at middle warm area lead zinc-silver is reduced into metal, due to metallic lead, zinc, the steaming of silver
Vapour pressure is the lowest, and highly volatile enters into flue, and the valuable metal entering flue is the most oxidized, the most in the form of the oxide by
Dust arrester installation is collected, and obtains, rich in silver, the zinc oxide fumes of lead valuable metal, i.e. containing silver oxide, lead oxide and zinc oxide
Flue dust, and at middle warm area warm area except the reduction volatilization of lead zinc-silver valuable metal, the also preliminary reduction of iron oxides, siderotil
Fe in slag2O3Being reduced into FeO and least a portion of metallic iron, then by middle warm area entrance high-temperature region, (high-temperature region arranges storage to material
Hot type burner), iron oxides carries out drastic reduction, obtains the metallization material of molten condition, in order to prevent fused materials and turn
End stove bottom refractory sticks together, and arranges water cooling plant in discharge zone and cools down the metallization material of molten condition,
Then metallization material is made to discharge by spiral scraper.
Inventor finds, carries out decomposition-reduction process by iron vitriol slag siccative mixes supply with coal dust to rotary hearth furnace,
In the preheating zone of rotary hearth furnace, siderotil is decomposed and the preliminary reduction of zinc ferrite, and along with the removing of this water of crystallization
With the evaporation of bed of material moisture, so that the mixing bed of material forms loose porous structure, and these loose structures improve reaction
During dynamic conditions, in middle warm area is conducive to rotary hearth furnace strongly reducing atmosphere, carbon monoxide enters inside the bed of material, thus
Not only improve ferrum lead silver zinc reduction efficiency, and improve lead zinc-silver volatilization efficiency (extrusion rate of lead zinc-silver 95% with
On), realize the drastic reduction of iron oxides simultaneously in high-temperature region, obtain degree of metalization and reach the metallization material of more than 88%,
And by arranging water cooling plant in discharge zone, the metallization material of the molten condition obtained by high-temperature region is carried out cooling process,
The metallization material that can avoid molten state bonds with rotary furnace bottom refractory material, thus ensures going out smoothly of metal compound material
Material.
According to one embodiment of present invention, in feed zone, the thickness of feed layer of mixed material is not particularly restricted, ability
Field technique personnel can select according to actual needs, according to a specific embodiment of the present invention, mixture in feed zone
The thickness of feed layer of material can be 40～65mm.Inventor finds, the thickest valuable metal of the bed of material should not volatilize, thus affect lead zinc-silver
The response rate, and the bed of material is the thinnest, and production efficiency reduces, and the bed of material is the thinnest simultaneously, causes atmospheric condition in furnace chamber the best, is easily caused
Material soft heat and be unfavorable for rotary hearth furnace spiral discharging.
According to still a further embodiment, feed zone and preheating zone keep temperature by middle warm area and high-temperature region heat radiation
Degree is at 600-900 DEG C, and middle warm area controls to be maintained at 900～1100 DEG C by burner, and high-temperature region controls temperature by burner and keeps
At 1100～1250 DEG C.Inventor finds, can be significantly better than other temperature conditionss and ensure that lead zinc-silver has higher at a temperature of being somebody's turn to do
Volatility and metallic iron there is the higher response rate.
According to still another embodiment of the invention, the metallization material of molten condition is after the water cooling plant that discharge zone is arranged
Temperature be 900～1000 degrees Celsius.Thus, it is possible to be prevented effectively from metallization material and the rotary furnace bottom fire proofed wood of molten state
Material bonding, thus ensure the smooth discharging of metal compound material.
S400: the metallization material that discharge zone is discharged is carried out mill ore magnetic selection process
In this step, the metallization material obtained by above-mentioned is carried out mill ore magnetic selection, obtains metal iron powder and tailings.Specifically
, carry out after the material that metallized by gained is cooled, broken, levigate magnetic separation process can realize metal iron powder and tailings point
From, and the grade of obtained metal iron powder reaches more than 88%, and iron recovery reaches more than 85%.
The method processing iron vitriol slag according to embodiments of the present invention by mixing supply to turning by iron vitriol slag siccative with coal dust
Carrying out decomposition-reduction process in end stove, in the preheating zone of rotary hearth furnace, siderotil is decomposed and the preliminary reduction of zinc ferrite, and
Along with removing and the evaporation of bed of material moisture of this water of crystallization, so that the mixing bed of material forms loose porous structure, and
These loose structures improve the dynamic conditions in course of reaction, an oxygen in middle warm area is conducive to rotary hearth furnace strongly reducing atmosphere
Change carbon to enter inside the bed of material, thus not only improve the reduction efficiency of ferrum lead silver zinc, and improve the volatilization efficiency (lead of lead zinc-silver
The extrusion rate of zinc-silver is more than 95%), realize the drastic reduction of iron oxides simultaneously in high-temperature region, obtain degree of metalization and reach
The metallization material of more than 88%, and by arranging the water cooling plant gold to the molten condition obtained by high-temperature region in discharge zone
Belong to compound material and carry out cooling process, the metallization material of molten state can be avoided to bond with rotary furnace bottom refractory material, thus
Ensure metal compound material smooth discharging, and then through mill ore magnetic selection can isolated metal iron powder (Iron grade reach 88% with
On), compared with the high temperature reduction volatility process used in prior art, the application can significantly reduce energy by using rotary hearth furnace
Consume, and iron recovery is up to more than 85%.Thus, use the present processes to not only solve iron vitriol slag bulk deposition to pollute
The problem of environment, and achieve the effective recycling of the valuable metals such as the ferrum lead zinc-silver in iron vitriol slag.
As it has been described above, according to embodiments of the present invention process iron vitriol slag method can have selected from following advantage at least it
One:
The method processing iron vitriol slag according to embodiments of the present invention uses powder to enter furnaceman's skill, saves briquetting program, saves
Cost.
The method processing iron vitriol slag according to embodiments of the present invention realizes iron vitriol slag and reducing agent coal by self-conveyor feed
The mixing of powder, such that it is able to avoid powder to block burner.
The method processing iron vitriol slag according to embodiments of the present invention uses rotary hearth furnace to process iron vitriol slag, relative to returning
Rotary kiln processes iron vitriol slag, and rotary hearth furnace processes the amount of allocating into of siderotil dross coal and decreases 70-80%, and economic benefit is obvious.
The method processing iron vitriol slag according to embodiments of the present invention makes compound be formed in the dehydration of preheating zone
A large amount of open structures improve dynamic conditions, the most beneficially removing of valuable metal, the removal efficiency of lead zinc up to 90% with
On, the removal efficiency more than 89% of silver.
In another aspect of the invention, the present invention proposes the system of a kind of method implementing above-mentioned process iron vitriol slag.
According to embodiments of the invention, with reference to Fig. 2 and 3, this system includes: drying unit 100, mixing arrangement 200, rotary hearth furnace 300 and
Mill ore magnetic selection device 400.
According to embodiments of the invention, drying unit 100 has iron vitriol slag entrance 101 and iron vitriol slag drier outlet 102, and
Be suitable to iron vitriol slag is carried out drying and processing, obtain iron vitriol slag siccative.Concrete, containing 22～the ferrum of 25% in iron vitriol slag, and
A large amount of valuable metal such as lead zinc-silver, has higher economic benefit.A specific embodiment according to the present invention, iron vitriol slag siccative
In water content can be 5～10wt%.Thus, it is possible not only to improve the reduction efficiency of follow-up ferrum lead zinc-silver, and can protect
Card is in the preheating zone of rotary hearth furnace, and mixing bed of material moisture evaporates so that the mixing bed of material forms loose porous structure, thus improves lead
The volatility of zinc-silver.
According to embodiments of the invention, mixing arrangement 200 has iron vitriol slag siccative entrance 201, coal powder entrance 202 and mixing
Material outlet 203, iron vitriol slag siccative entrance 201 is connected with iron vitriol slag drier outlet 102, and is suitable to iron vitriol slag obtained above
Siccative mixes with coal dust, obtains mixed material.Concrete, mixing arrangement can be spiral distributor.
According to one embodiment of present invention, iron vitriol slag siccative is not particularly restricted with the mixed proportion of coal dust, ability
Field technique personnel can select according to actual needs, and according to a specific embodiment of the present invention, coal dust is done with iron vitriol slag
Material can be 1.6～2.0 to mix according to carbon-to-oxygen ratio.Inventor finds, if coal dust addition is the lowest, causes the reduction can not be thorough
The end, is carried out, thus reduces the response rate of ferrum lead zinc-silver, and if coal dust addition is the highest, carbon therein can not burn completely, causes
The product carbon content that reduction roasting terminates to obtain raises.
According to still a further embodiment, the particle diameter of coal dust is not particularly restricted, and those skilled in the art are permissible
Selecting according to actual needs, according to a specific embodiment of the present invention, the particle diameter of coal dust can be 0.5～1mm.Invention
People finds, if coal particle size is the thickest so that iron vitriol slag is insufficient contact with coal dust and affects sequential reduction effect, and if coal dust mistake
Carefully, in rotary hearth furnace, easy airborne dust, causes the loss of coal dust.
According to embodiments of the invention, with reference to Fig. 2 and 3, rotary hearth furnace 300 sequentially forms feed zone along furnace bottom rotation direction
31, preheating zone 32, middle warm area 33, high-temperature region 34 and discharge zone 35, feed zone 31 is provided with mixed material entrance 301, middle warm area
33 are provided with flue dust outlet 302, and middle warm area 33 and high-temperature region 34 are respectively arranged with burner 36, and discharge zone 35 is provided with water cooling plant
37, metallization material outlet 303 and spiral scraper (not shown), mixed material entrance 301 and mixed material export 203 phases
Connect, and be suitable to the feed zone of mixed material obtained above supply to rotary hearth furnace so that mixed material sequentially passes through rotary hearth furnace
Preheating zone, middle warm area and high-temperature region carry out decomposition-reduction, obtain the flue dust containing silver oxide, lead oxide and zinc oxide and molten
Melting the metallization material of state, the metallization material of molten condition is arranged by spiral scraper after the water cooling plant that discharge zone is arranged
Go out.
In this step, by the feed zone in mixed material obtained above supply to rotary hearth furnace, in iron vitriol slag, ferrum is mainly
With AFe3(SO4)2(OH)6Presented in, the one during wherein A is K, Na, having a small part is ZnFe2O form exists, and zinc removes
A small amount of exists with zinc ferrite form, and major part is presented in zinc sulfate and zinc silicate, and lead and silver is all with sulfate
Form exist, in preheating zone, due to middle warm area and the heat radiation of high-temperature region, siderotil can decompose in preheating zone generation water and
Fe2O3, and along with the removing of water of crystallization and the evaporation of moisture in the bed of material in iron vitriol slag, can also realize in preheating zone simultaneously
The preliminary reduction of zinc ferrite, along with the rotation of rotary hearth furnace, material runs to middle warm area (middle warm area is provided with burner), due in advance
Water of crystallization and the evaporation of table water in the compound of hot-zone cause the mixing bed of material to form loose porous structure, and these loose structures improve
Dynamic conditions in course of reaction, beneficially CO enters inside pelletizing in rotary hearth furnace strongly reducing atmosphere, is simultaneously also beneficial to
The volatilization of valuable metal lead zinc-silver, the compound at middle warm area lead zinc-silver is reduced into metal, due to metallic lead, zinc, the steaming of silver
Vapour pressure is the lowest, and highly volatile enters into flue, and the valuable metal entering flue is the most oxidized, the most in the form of the oxide by
Dust arrester installation is collected, and obtains, rich in silver, the zinc oxide fumes of lead valuable metal, i.e. containing silver oxide, lead oxide and zinc oxide
Flue dust, and at middle warm area warm area except the reduction volatilization of lead zinc-silver valuable metal, the also preliminary reduction of iron oxides, siderotil
Fe in slag2O3Being reduced into FeO and least a portion of metallic iron, then by middle warm area entrance high-temperature region, (high-temperature region arranges storage to material
Hot type burner), iron oxides carries out drastic reduction, obtains the metallization material of molten condition, in order to prevent fused materials and turn
End stove bottom refractory sticks together, and arranges water cooling plant in discharge zone and cools down the metallization material of molten condition,
Then metallization material is made to discharge by spiral scraper.
Inventor finds, carries out decomposition-reduction process by iron vitriol slag siccative mixes supply with coal dust to rotary hearth furnace,
In the preheating zone of rotary hearth furnace, siderotil is decomposed and the preliminary reduction of zinc ferrite, and along with the removing of this water of crystallization
With the evaporation of bed of material moisture, so that the mixing bed of material forms loose porous structure, and these loose structures improve reaction
During dynamic conditions, in middle warm area is conducive to rotary hearth furnace strongly reducing atmosphere, carbon monoxide enters inside the bed of material, thus
Not only improve ferrum lead silver zinc reduction efficiency, and improve lead zinc-silver volatilization efficiency (extrusion rate of lead zinc-silver 95% with
On), realize the drastic reduction of iron oxides simultaneously in high-temperature region, obtain degree of metalization and reach the metallization material of more than 88%,
And by arranging water cooling plant in discharge zone, the metallization material of the molten condition obtained by high-temperature region is carried out cooling process,
The metallization material that can avoid molten state bonds with rotary furnace bottom refractory material, thus ensures going out smoothly of metal compound material
Material.
According to one embodiment of present invention, in feed zone, the thickness of feed layer of mixed material is not particularly restricted, ability
Field technique personnel can select according to actual needs, according to a specific embodiment of the present invention, mixture in feed zone
The thickness of feed layer of material can be 40～65mm.Inventor finds, the thickest valuable metal of the bed of material should not volatilize, thus affect lead zinc-silver
The response rate, and the bed of material is the thinnest, and production efficiency reduces, and the bed of material is the thinnest simultaneously, causes atmospheric condition in furnace chamber the best, is easily caused
Material soft heat and be unfavorable for rotary hearth furnace spiral discharging.
According to still a further embodiment, feed zone and preheating zone keep temperature by middle warm area and high-temperature region heat radiation
Degree is at 600-900 DEG C, and middle warm area controls to be maintained at 900～1100 DEG C by burner, and high-temperature region controls temperature by burner and keeps
At 1100～1250 DEG C.Inventor finds, can be significantly better than other temperature conditionss and ensure that lead zinc-silver has higher at a temperature of being somebody's turn to do
Volatility and metallic iron there is the higher response rate.
According to still another embodiment of the invention, the metallization material of molten condition is after the water cooling plant that discharge zone is arranged
Temperature be 900～1000 degrees Celsius.Thus, it is possible to be prevented effectively from metallization material and the rotary furnace bottom fire proofed wood of molten state
Material bonding, thus ensure the smooth discharging of metal compound material.
According to embodiments of the invention, mill ore magnetic selection device 400 has metallization material inlet 401, metal iron powder outlet
402 and tailings outlet 403, metallization material inlet 401 is connected with metallization material outlet 303, and is suitable to above-mentioned obtained
Metallization material carry out mill ore magnetic selection, obtain metal iron powder and tailings.Concrete, the material that metallized by gained is cooled, broken
Carry out magnetic separation after broken, levigate and process the separation that can realize metal iron powder and tailings, and the grade of obtained metal iron powder
Reaching more than 88%, iron recovery reaches more than 85%.
The system processing iron vitriol slag according to embodiments of the present invention by mixing supply to turning by iron vitriol slag siccative with coal dust
Carrying out decomposition-reduction process in end stove, in the preheating zone of rotary hearth furnace, siderotil is decomposed and the preliminary reduction of zinc ferrite, and
Along with removing and the evaporation of bed of material moisture of this water of crystallization, so that the mixing bed of material forms loose porous structure, and
These loose structures improve the dynamic conditions in course of reaction, an oxygen in middle warm area is conducive to rotary hearth furnace strongly reducing atmosphere
Change carbon to enter inside the bed of material, thus not only improve the reduction efficiency of ferrum lead silver zinc, and improve the volatilization efficiency (lead of lead zinc-silver
The extrusion rate of zinc-silver is more than 95%), realize the drastic reduction of iron oxides simultaneously in high-temperature region, obtain degree of metalization and reach
The metallization material of more than 88%, and by arranging the water cooling plant gold to the molten condition obtained by high-temperature region in discharge zone
Belong to compound material and carry out cooling process, the metallization material of molten state can be avoided to bond with rotary furnace bottom refractory material, thus
Ensure metal compound material smooth discharging, and then through mill ore magnetic selection can isolated metal iron powder (Iron grade reach 88% with
On), compared with the high temperature reduction volatility process used in prior art, the application can significantly reduce energy by using rotary hearth furnace
Consume, and iron recovery is up to more than 85%.Thus, use the system of the application to not only solve iron vitriol slag bulk deposition to pollute
The problem of environment, and achieve the effective recycling of the valuable metals such as the ferrum lead zinc-silver in iron vitriol slag.
Below with reference to specific embodiment, present invention is described, it should be noted that these embodiments are only to describe
Property, and limit the present invention never in any form.
Embodiment 1
All iron content 22wt% in iron vitriol slag, Zn content 4wt%, lead content 3wt%, silver content 180g/t, first by ferrum
It is 5wt% that vitriol slag carries out drying to water content, is then joined according to carbon-to-oxygen ratio 1.6 with carbon dust by obtained iron vitriol slag siccative
Material, wherein, the particle diameter of coal dust is 0.5～1mm, supplies to rotary hearth furnace, keep the feed zone bed of material after being mixed by screw feeder
Thickness about 40mm, along with furnace bottom rotates, mixed material is entered into preheating zone by feed zone, and middle warm area and high temperature are passed through in preheating zone
The thermal radiation temperature in district is maintained at 800～900 DEG C, and in preheating zone, iron vitriol slag decomposes generation Fe2O3, slough thing in preheating zone simultaneously
Moisture in material, in rotary hearth furnace, warm area is maintained at 950 ± 10 DEG C by burner temperature, and middle warm area zinc ferrite is reduced generation metal
Zinc, the compound of lead sulfate and silver generates metallic lead and silver by heat resolve reduction, after the volatilization of these valuable metals again
Oxidized, and be collected in the form of an oxide, obtain the dust containing silver oxide, lead oxide and zinc oxide, wherein in dust
The grade of zinc oxide reaches more than 62%, and silver content is 2200g/t, and in the metallized pellet obtained, the removal efficiency of lead zinc is respectively
95.51% and 96.42%, the removal efficiency of silver is 94.36%, and it is 1210 ± 10 DEG C that high-temperature region controls temperature by burner, at this
District realizes the drastic reduction of ferrum, obtains the metallization material of degree of metalization 84%, and the material that metallizes entered the water of discharge zone
Device for cooling is cooled to 900-1000 DEG C, and discharges rotary hearth furnace by spiral material scraper, and the metallization material obtained passes through ore grinding
Magnetic separation can obtain Iron grade 86%, the metal iron powder of the response rate 80%.
Embodiment 2
All iron content 22wt% in iron vitriol slag, Zn content 4wt%, lead content 3wt%, silver content 180g/t, first by ferrum
It is 5wt% that vitriol slag carries out drying to water content, is then joined according to carbon-to-oxygen ratio 1.6 with carbon dust by obtained iron vitriol slag siccative
Material, wherein, the particle diameter of coal dust is 0.5～1mm, supplies to rotary hearth furnace, keep the feed zone bed of material after being mixed by screw feeder
Thickness about 65mm, along with furnace bottom rotates, mixed material is entered into preheating zone by feed zone, and middle warm area and high temperature are passed through in preheating zone
The thermal radiation temperature in district is maintained at 800～900 DEG C, and in preheating zone, iron vitriol slag decomposes generation Fe2O3, slough thing in preheating zone simultaneously
Moisture in material, in rotary hearth furnace, warm area is maintained at 950 ± 10 DEG C by burner temperature, and middle warm area zinc ferrite is reduced generation metal
Zinc, the compound of lead sulfate and silver generates metallic lead and silver by heat resolve reduction, after the volatilization of these valuable metals again
Oxidized, and be collected in the form of an oxide, obtain the dust containing silver oxide, lead oxide and zinc oxide, wherein in dust
The grade of zinc oxide reaches more than 62%, and silver content is 1800g/t, and in the metallized pellet obtained, the removal efficiency of lead zinc is respectively
90.63% and 91.58%, the removal efficiency of silver is 88.25%, and it is 1210 ± 10 DEG C that high-temperature region controls temperature by burner, at this
District realizes the drastic reduction of ferrum, obtains the metallization material of degree of metalization 83%, and the material that metallizes entered the water of discharge zone
Device for cooling is cooled to 900-1000 DEG C, and discharges rotary hearth furnace by spiral material scraper, and the metallization material obtained passes through ore grinding
Magnetic separation can obtain Iron grade 84%, the metal iron powder of the response rate 79%.
Embodiment 3
In iron vitriol slag, full ferrum 25%, Zn content 7%, lead content 5%, silver content 220g/t, first dry iron vitriol slag
Doing to water content is 10wt%, then according to carbon-to-oxygen ratio 2.0 obtained iron vitriol slag siccative and carbon dust is carried out dispensing, wherein,
The particle diameter of coal dust is 0.5～1mm, supplies to rotary hearth furnace, keep feed zone thickness of feed layer 55mm after being mixed by screw feeder
Left and right, along with furnace bottom rotates, mixed material is entered into preheating zone by feed zone, and middle warm area and the hot spoke of high-temperature region are passed through in preheating zone
Penetrating temperature and be maintained at 800～900 DEG C, in preheating zone, iron vitriol slag decomposes generation Fe2O3, the water in material is sloughed in preheating zone simultaneously
Point, in rotary hearth furnace, warm area is maintained at 950 ± 10 DEG C by burner temperature, and middle warm area zinc ferrite is reduced generation metallic zinc, sulphuric acid
The compound of lead and silver generates metallic lead and silver by heat resolve reduction, and the volatilization of these valuable metals is the most oxidized,
And it is collected in the form of an oxide, obtains the dust containing silver oxide, lead oxide and zinc oxide, wherein zinc oxide in dust
Grade reaches more than 63%, and silver content is 2400g/t, and in the metallized pellet obtained, the removal efficiency of lead zinc is respectively 93.27% He
93.88%, the removal efficiency of silver is 93.17%, and it is 1230 ± 10 DEG C that high-temperature region controls temperature by burner, realizes ferrum in this district
Drastic reduction, obtains the metallization material of degree of metalization 86%, and the material that metallizes entered the water cooling plant cooling of discharge zone
To 900-1000 DEG C, and discharging rotary hearth furnace by spiral material scraper, the metallization material obtained can be obtained by mill ore magnetic selection
To Iron grade 87%, the metal iron powder of the response rate 82%.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show
Example " or the description of " some examples " etc. means to combine this embodiment or example describes specific features, structure, material or spy
Point is contained at least one embodiment or the example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.And, the specific features of description, structure, material or feature can be in office
One or more embodiments or example combine in an appropriate manner.Additionally, in the case of the most conflicting, the skill of this area
The feature of the different embodiments described in this specification or example and different embodiment or example can be tied by art personnel
Close and combination.
Although above it has been shown and described that embodiments of the invention, it is to be understood that above-described embodiment is example
Property, it is impossible to being interpreted as limitation of the present invention, those of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, revises, replaces and modification.
Claims (9)
1. the method processing iron vitriol slag, it is characterised in that including:
(1) iron vitriol slag is carried out drying and processing, in order to obtain iron vitriol slag siccative；
(2) described iron vitriol slag siccative is mixed with coal dust, in order to obtain mixed material；
(3) by the feed zone of described mixed material supply to rotary hearth furnace so that described mixed material sequentially passes through described rotary hearth furnace
Preheating zone, middle warm area and high-temperature region carry out decomposition-reduction, and described middle warm area and described high-temperature region are respectively provided with burner,
To the flue dust containing silver oxide, lead oxide and zinc oxide and the metallization material of molten condition, the metal of described molten condition
Compound material is discharged by spiral scraper after the water cooling plant that discharge zone is arranged；
(4) the metallization material that described discharge zone is discharged is carried out mill ore magnetic selection process, in order to obtain metal iron powder and tailings.
Method the most according to claim 1, it is characterised in that the water content in step (1), in described iron vitriol slag siccative
It is 5～10wt%.
Method the most according to claim 1 and 2, it is characterised in that in step (2), by described coal dust and described siderotil
Slag siccative is 1.6～2.0 to mix according to carbon-to-oxygen ratio.
4. according to the method according to any one of claim 1-3, it is characterised in that in step (2), the particle diameter of described coal dust
It is 0.5～1mm.
5. according to the method according to any one of claim 1-4, it is characterised in that in step (3), mixed in described feed zone
The thickness of feed layer of compound material is 40～65mm.
6. according to the method according to any one of claim 1-5, it is characterised in that in step (3), the temperature of described middle warm area
Degree is 900～1000 degrees Celsius, and the temperature of described high-temperature region is 1100～1250 degrees Celsius.
7. according to the method according to any one of claim 1-6, it is characterised in that in step (3), described molten condition
Metallization material temperature after the water cooling plant that discharge zone is arranged is 900～1000 degrees Celsius.
8. the system of the method processing iron vitriol slag implemented according to any one of claim 1-7, it is characterised in that bag
Include:
Drying unit, described drying unit has iron vitriol slag entrance and iron vitriol slag drier outlet；
Mixing arrangement, described mixing arrangement has iron vitriol slag siccative entrance, coal powder entrance and mixed material outlet, described iron vitriol slag
Siccative entrance is connected with described iron vitriol slag drier outlet；
Rotary hearth furnace, described rotary hearth furnace sequentially forms feed zone, preheating zone, middle warm area, high-temperature region along furnace bottom rotation direction and goes out
Material district, described feed zone is provided with mixed material entrance, and described middle warm area is provided with flue dust outlet, described middle warm area and described height
Warm area is respectively arranged with burner, and described discharge zone is provided with water cooling plant, metallization material outlet and spiral scraper, described mixed
Close material inlet to be connected with the outlet of described mixed material；
Mill ore magnetic selection device, described mill ore magnetic selection device has metallization material inlet, metal iron powder outlet and tailings outlet, institute
State metallization material inlet to be connected with described metallization material outlet.
System the most according to claim 8, it is characterised in that described mixing arrangement is spiral distributor.
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Cited By (4)
| 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 |
| CN107739817A (en) * | 2017-10-10 | 2018-02-27 | 北京矿冶研究总院 | Method for calcified chlorination and volatilization comprehensive resource utilization of jarosite slag |
| CN108330276A (en) * | 2018-01-30 | 2018-07-27 | 铜陵有色金属集团股份有限公司 | Method for preparing high-purity iron powder using iron vitriol slag and products thereof and application |
| CN113528810A (en) * | 2021-06-30 | 2021-10-22 | 广东邦普循环科技有限公司 | Method for treating mixture of laterite nickel ore leaching slag and jarosite slag and application |
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| CN104911365A (en) * | 2015-04-14 | 2015-09-16 | 中南大学 | Cadmia reduction smelting method for the preparation of low-phosphorus iron |
| CN105671328A (en) * | 2016-03-25 | 2016-06-15 | 江苏省冶金设计院有限公司 | Rotary hearth furnace and method for treating lead and zinc smelting slag |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104911365A (en) * | 2015-04-14 | 2015-09-16 | 中南大学 | Cadmia reduction smelting method for the preparation of low-phosphorus iron |
| CN105671328A (en) * | 2016-03-25 | 2016-06-15 | 江苏省冶金设计院有限公司 | Rotary hearth furnace and method for treating lead and zinc smelting slag |
Cited By (4)
| 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 |
| CN107739817A (en) * | 2017-10-10 | 2018-02-27 | 北京矿冶研究总院 | Method for calcified chlorination and volatilization comprehensive resource utilization of jarosite slag |
| CN108330276A (en) * | 2018-01-30 | 2018-07-27 | 铜陵有色金属集团股份有限公司 | Method for preparing high-purity iron powder using iron vitriol slag and products thereof and application |
| CN113528810A (en) * | 2021-06-30 | 2021-10-22 | 广东邦普循环科技有限公司 | Method for treating mixture of laterite nickel ore leaching slag and jarosite slag and application |
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Application publication date: 20161109 |