CN205907307U - System for use multipurposely volatile kiln of zinc sediment and red mud - Google Patents
System for use multipurposely volatile kiln of zinc sediment and red mud Download PDFInfo
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- CN205907307U CN205907307U CN201620831277.3U CN201620831277U CN205907307U CN 205907307 U CN205907307 U CN 205907307U CN 201620831277 U CN201620831277 U CN 201620831277U CN 205907307 U CN205907307 U CN 205907307U
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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 a system for use multipurposely volatile kiln of zinc sediment and red mud, include: volatile kiln of zinc sediment drying device, volatile kiln of zinc sediment breaker, red mud drying device, red mud breaker, mixing and making the football shirt and put, it has the broken material entry of volatile kiln of zinc sediment, the broken material entry of red mud, water entry and mixes the pelletizing export, the rotary hearth furnace forms intake zone, preheating zone, well warm area, high -temperature region and the ejection of compact in proper order along the stove bottom rotation direction in it and distinguishes, and the intake zone is provided with mixed pelletizing entry, and well warm area is provided with the smoke and dust export, and the ejection of compact is distinguished and is provided with the metallized pellet export, and mixed pelletizing entry is continuous with mixed pelletizing export, the grinding magnetic separation device, it has metallized pellet entry, the export of metal iron powder and tailing export, and the metallized pellet entry links to each other with the metallized pellet export. Valuable metal such as retrieving lead zinc silver lead in volatile kiln of zinc sediment and the red mud can follow in this system to realize the utilization of volatilization kiln sediment and red mud.
Description
Technical field
The utility model belongs to metallurgical technology field, and specifically, the utility model is related to a kind of comprehensive utilization zinc volatilization
Kiln slag and the system of red mud.
Background technology
According to statistics, current China metallurgical solid waste annual output is about 4.3 hundred million tons, and comprehensive utilization ratio is about
18.03%.For the present situation of China's metallurgical industry solid waste, recycling treatment and comprehensive utilization are relevant enterprise and mechanism
Must pay attention to and go into overdrive carrying out studying the problem breaking through.At present China's nonferrous metallurgy solid waste include copper ashes, red mud,
Lead cadmia, nickel slag etc., wherein red mud and lead cadmia are because containing a large amount of valuable metal such as iron, lead, zinc, have very high economic valency
Value.
In Zinc Hydrometallurgy Process, two kinds of techniques are typically had to be reclaimed using leaching the cadmia obtaining in two sections, one is fire
Method, that is, adopt rotary kiln evaporation method；Another kind is wet method, i.e. hot acid lixiviation process.Rotary kiln evaporation method is China's Zinc Hydrometallurgy Residue
Process the typical process using.Zinc volatilization kiln slag is the leached mud coke powder with addition of 40%～50% again during zinc hydrometallurgy, is returning
The residue after the metals such as zinc, lead is extracted under high temperature in rotary kiln.Because the coke powder that Rotary Kiln is joined aborning fails to fire completely
Burn, cause part coke powder to remain in kiln slag, do not reclaim, the loss of the energy can be caused, and zinc kiln slag is enriched in zinc concentrate
Silver, the valuable metal such as gold, copper, gallium, iron, are of great value resources, and the content of especially silver can reach 200～350g/t, by
In mineralogical character, even if when adding a large amount of floating agent, silver also cannot be made effectively to be reclaimed, and pass through kiln slag
Leached again, acid consumption is huge.
Red mud is the topmost solid slag producing in aluminum oxide industry production process, and at present, domestic red mud is arranged every year
High-volume more than 30,000,000 t, in addition to small part is applied to the purposes such as manufacture of cement, brickmaking, outdoor the building a dam of most wet method is stored up, now
Red mud accumulation is stored up more than 3.5 hundred million tons.The about iron containing 20-30% in red mud, is a kind of good iron-smelting raw material, but
Due to there being substantial amounts of al in red mud2o3、sio2Deng composition, increased difficulty to smelting, under the pressure of environmental pressure and iron ore resource
Day by day exhausted, the recycling of red mud is extremely urgent.
Therefore, the treatment technology of existing metallurgical solid waste red mud and zinc kiln slag needs to be probed into further.
Utility model content
The utility model is intended at least solve one of technical problem in correlation technique to a certain extent.For this reason, this reality
It is to propose the system of a kind of comprehensive utilization Zinc volatilization kiln slag and red mud with a new purpose, this system can be volatilized from zinc
The valuable metals such as lead zinc-silver lead are reclaimed, thus realizing the recycling of kiln slag and red mud that volatilizees in kiln slag and red mud.
In one side of the present utility model, the utility model proposes a kind of comprehensive utilization Zinc volatilization kiln slag and red mud
System.According to embodiment of the present utility model, this system includes:
Zinc volatilization kiln slag drying unit, described Zinc volatilization kiln slag drying unit has Zinc volatilization kiln slag entrance and Zinc volatilization kiln
Slag drier outlet；
Zinc volatilization kiln slag crushing device, described Zinc volatilization kiln slag crushing device has Zinc volatilization kiln slag siccative entrance and zinc is waved
Send out the outlet of kiln slag broken material, described Zinc volatilization kiln slag siccative entrance is connected with described Zinc volatilization kiln slag drier outlet；
Red mud drying unit, described red mud drying unit has red mud entrance and red mud drier outlet；
Red mud breaker, described red mud breaker has red mud siccative entrance and the outlet of red mud broken material, described red
Mud siccative entrance is connected with described red mud drier outlet；
Mixed pelletizing device, described mixed pelletizing device have Zinc volatilization kiln slag broken material entrance, red mud broken material entrance,
Water inlet and mixing pelletizing outlet, described Zinc volatilization kiln slag broken material entrance is connected with the outlet of described Zinc volatilization kiln slag broken material,
Described red mud broken material entrance is connected with the outlet of described red mud broken material；
Rotary hearth furnace, sequentially forms feed zone, preheating zone, middle warm area, high temperature along furnace bottom rotation direction in described rotary hearth furnace
Area and discharge zone, described feed zone is provided with mixing pelletizing entrance, and described middle warm area is provided with flue dust outlet, and described discharge zone sets
It is equipped with metallized pellet outlet, described mixing pelletizing entrance is connected with the outlet of described mixing pelletizing；
Mill ore magnetic selection device, described mill ore magnetic selection device has metallized pellet entrance, metal iron powder outlet and mine tailing and goes out
Mouthful, described metallized pellet entrance is connected with the outlet of described metallized pellet.
Thus, the system of the comprehensive utilization Zinc volatilization kiln slag according to the utility model embodiment and red mud pass through red mud and
The collocation of Zinc volatilization kiln slag carries out mixed pelletizing, because the caking property of red mud itself is it is not necessary to extra addition binding agent, obtained
Pelletizing still there is higher intensity (fall strength of briquette reaches 8～10 times), cannot individually become such that it is able to solve Zinc volatilization kiln slag
A difficult problem for ball, simultaneously because containing substantial amounts of surplus carbon in Zinc volatilization kiln slag, therefore directly can be volatilized to red mud and zinc with rotary hearth furnace
Mixing pelletizing after kiln slag mixed pelletizing carries out reduction treatment, adds reducing agent without extra, in rotary hearth furnace, mixes ball
Lead zinc-silver compound in group is reduced to simple substance, and is volatized into flue and is recovered in the form of an oxide, and mixes pelletizing
In iron compound to be reduced by metallic iron simple substance agglomeration be metallized pellet, and in prior art, individually process red mud
During, al in red mud2o3、cao、sio2, the oxide such as mgo easily form the compound of low melting point under the high temperature conditions, and
The compound viscosity of these low melting points is larger, the reduction of iron and gathering in impact red mud, and this is also the one of pyrogenic attack red mud
An individual difficult problem, but by red mud and Zinc volatilization kiln slag are carried out mixed pelletizing in the application, in reduction process, Zinc volatilization kiln slag
The metallic iron that middle reduction obtains as the gathering of iron in crystal seed promotion red mud and can be grown up, short grained Zinc volatilization kiln simultaneously
Slag can play skeleton function to pelletizing it is ensured that pelletizing intensity under the high temperature conditions, such that it is able to significantly improve gained metal
The degree of metalization (reaching more than 90%) of pellet, and through follow-up mill ore magnetic selection be separable obtain metal iron powder, in addition red mud
For basic slag, arrange in pairs or groups with acid Zinc volatilization kiln slag, it is possible to reduce the erosion to equipment.Thus, the system using the application can
To reclaim the valuable metals such as lead zinc-silver lead from Zinc volatilization kiln slag and red mud, thus realizing the resource profit of kiln slag and red mud of volatilizing
With.
Optional, described mixed pelletizing device is ball press or pelletizer.
Additional aspect of the present utility model and advantage will be set forth in part in the description, partly will be from explained below
In become obvious, or recognized by practice of the present utility model.
Brief description
Above-mentioned and/or additional aspect of the present utility model and advantage will from reference to the description to embodiment for the accompanying drawings below
Become obvious and easy to understand, wherein:
Fig. 1 is the system architecture signal comprehensively utilizing Zinc volatilization kiln slag and red mud according to one embodiment of the utility model
Figure；
Fig. 2 is according to turning in the system comprehensively utilizing Zinc volatilization kiln slag and red mud of the utility model further embodiment
The overlooking the structure diagram of bottom stove；
Fig. 3 is to be implemented comprehensively using the comprehensive utilization Zinc volatilization kiln slag of one embodiment of the utility model and the system of red mud
Method flow schematic diagram using Zinc volatilization kiln slag and red mud.
Specific embodiment
Embodiment of the present utility model is described below in detail, the example of described embodiment is shown in the drawings, wherein ad initio
To the element that same or similar label represents same or similar element or has same or like function eventually.Below by ginseng
The embodiment examining Description of Drawings is exemplary it is intended to be used for explaining the utility model, and it is not intended that to the utility model
Restriction.
In description of the present utility model it is to be understood that term " " center ", " longitudinal ", " horizontal ", " length ", " width
Degree ", " thickness ", " on ", D score, "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outward ",
The orientation of instruction such as " clockwise ", " counterclockwise ", " axial ", " radially ", " circumferential " or position relationship are based on shown in the drawings
Orientation or position relationship, are for only for ease of description the utility model and simplify description, rather than the dress of instruction or hint indication
Put or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to the utility model
Restriction.
In the utility model, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection ", " Gu
Fixed " etc. term should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or integral；Can be
It is mechanically connected or electrically connect；Can be to be joined directly together it is also possible to be indirectly connected to by intermediary, can be two
The connection of element internal or the interaction relationship of two elements, limit unless otherwise clear and definite.Common skill for this area
For art personnel, concrete meaning in the utility model for the above-mentioned term can be understood as the case may be.
In one side of the present utility model, the utility model proposes a kind of implement above-mentioned comprehensive utilization Zinc volatilization kiln
The system of the method for slag and red mud.According to embodiment of the present utility model, with reference to Fig. 1 and 2, this system includes: Zinc volatilization kiln slag
Drying unit 100, Zinc volatilization kiln slag crushing device 200, red mud drying unit 300, red mud breaker 400, mixed pelletizing dress
Put 500, rotary hearth furnace 600 and mill ore magnetic selection device 700.
According to embodiment of the present utility model, Zinc volatilization kiln slag drying unit 100 has Zinc volatilization kiln slag entrance 101 and zinc
Volatilization kiln slag drier outlet 102, and be suitable to for Zinc volatilization kiln slag to carry out drying and processing, obtain Zinc volatilization kiln slag siccative.Specifically,
Zinc volatilization kiln slag is the leached mud coke powder with addition of 40～50% again during zinc hydrometallurgy, extracts zinc, lead under high temperature in rotary kiln
Deng the residue after metal, its all iron content is 20～40%, and Zn content is 1～5%, and lead content is 0.8～2%, silver content
For 100～150g/t, it is not high that metallic iron accounts for water content in the 40～60% of all iron content, and the Zinc volatilization kiln slag siccative obtaining
In 2%.
According to embodiment of the present utility model, Zinc volatilization kiln slag crushing device 200 has Zinc volatilization kiln slag siccative entrance 201
Export 202 with Zinc volatilization kiln slag broken material, Zinc volatilization kiln slag siccative entrance 201 is connected with Zinc volatilization kiln slag drier outlet 102, and
It is suitable to for Zinc volatilization kiln slag siccative obtained above to carry out break process, obtain Zinc volatilization kiln slag broken material.New according to this practicality
One embodiment of type, the particle diameter of Zinc volatilization kiln slag broken material is not particularly restricted, and those skilled in the art can be according to reality
Border needs to be selected, and according to specific embodiment of the utility model, the particle diameter of Zinc volatilization kiln slag broken material can be 1～3mm.
Inventor finds, Zinc volatilization kiln slag broken material particle diameter is slightly unfavorable for the volatilization of lead zinc-silver during sequential reduction excessively, and particle diameter mistake
Carefully so that the obtained pelletizing porosity is low, lead to the poor air permeability of pelletizing, thus affecting the reduction efficiency of lead zinc-silver iron.
According to embodiment of the present utility model, red mud drying unit 300 has red mud entrance 301 and red mud drier outlet
302, and be suitable to for red mud to carry out drying and processing, obtain red mud siccative.Specifically, in red mud, iron content is 23～30%, and
Water content in obtained red mud siccative is not higher than 2%.
According to embodiment of the present utility model, red mud breaker 400 has red mud siccative entrance 401 and red mud broken material
Outlet 402, red mud siccative entrance 401 is connected with red mud drier outlet 302, and is suitable to be broken red mud siccative obtained above
Broken process, obtains red mud broken material.According to an embodiment of the present utility model, the particle diameter of red mud broken material is not especially limited
System, those skilled in the art can be selected according to actual needs, and according to specific embodiment of the utility model, red mud crushes
The particle diameter of material can be not higher than 75 microns.Inventor finds, the particle diameter of red mud broken material is too high will not to have the effect of binding agent,
And contribute to the reduction of iron in red mud compared with the red mud of fine grain.
According to embodiment of the present utility model, mixed pelletizing device 500 has Zinc volatilization kiln slag broken material entrance 501, red
Mud broken material entrance 502, water inlet 503 and mixing pelletizing outlet 504, Zinc volatilization kiln slag broken material entrance 501 and Zinc volatilization kiln
Slag broken material outlet 202 is connected, and red mud broken material entrance 502 is connected with red mud broken material outlet 402, and is suitable to obtain above-mentioned
Zinc volatilization kiln slag broken material and red mud broken material and water carry out mixed pelletizing, obtain mixing pelletizing.Inventor finds, by inciting somebody to action
Red mud broken material and the collocation of Zinc volatilization kiln slag broken material carry out mixed pelletizing, because the caking property of red mud itself is it is not necessary to extra
Addition binding agent, obtained pelletizing still has higher intensity (fall strength of briquette reaches 8～10 times), such that it is able to solve zinc
Volatilization kiln slag cannot independent balling-up a difficult problem, simultaneously because containing substantial amounts of surplus carbon in Zinc volatilization kiln slag, therefore can be by red mud
It is directly fed in rotary hearth furnace carry out reduction treatment with the mixing pelletizing after Zinc volatilization kiln slag mixed pelletizing, add without extra
Secondly enter reducing agent, by Zinc volatilization kiln slag and the collocation of red mud large or fine granule it is ensured that the gas permeability of pelletizing, and improve reduction
The thermodynamics and kineticses condition of process, thus realize red mud and the resource of Zinc volatilization kiln slag while reducing processing cost
Using.
According to an embodiment of the present utility model, the mixed proportion of Zinc volatilization kiln slag broken material and red mud broken material and water
It is not particularly restricted, those skilled in the art can be selected according to actual needs, according to concrete reality of the present utility model
Apply example, Zinc volatilization kiln slag broken material and red mud broken material and water can be 100:(150～200 according to mass ratio): (25～
45) carry out mixed pelletizing.Inventor finds, can ensure that in mixing pelletizing, superfluous carbon ratio is in 1.5-1.8 under this mixed proportion
Between, such that it is able to significantly improve the reduction efficiency of lead zinc-silver iron during sequential reduction, and obtained pelletizing have
Higher intensity.Specifically, mixed pelletizing device can be ball press or pelletizer.
According to embodiment of the present utility model, with reference to Fig. 1 and Fig. 2, along furnace bottom rotation direction successively shape in rotary hearth furnace 600
Become feed zone 61, preheating zone 62, middle warm area 63, high-temperature region 64 and discharge zone 65, feed zone 61 is provided with mixing pelletizing entrance
601, middle warm area 63 is provided with flue dust outlet 602, and discharge zone 65 is provided with metallized pellet outlet 603, mixes pelletizing entrance 601
504 be connected with mixing pelletizing outlet, and be suitable to by above-mentioned mixing pelletizing supply to rotary hearth furnace feed zone so that mix pelletizing according to
Secondary preheating zone through rotary hearth furnace, middle warm area and high-temperature region are reduced, obtain containing zinc oxide, lead oxide and silver oxide
Flue dust is discharged from high-temperature region, obtains metallized pellet and discharges from discharge zone.
In this step, by obtained above mixing pelletizing supply to rotary hearth furnace feed zone so that mixing pelletizing warp successively
Cross preheating zone, middle warm area and the high-temperature region of rotary hearth furnace, preheating zone keeping temperature under the heat radiation of middle warm area and high-temperature region is 600
～900 DEG C, pelletizing is heated in this area and dries, and subsequently in middle warm area, middle warm area controls temperature by burner, realizes mixing
The reduction of lead zinc-silver oxide in pelletizing, because the saturated vapor pressure of lead these valuable metals of zinc-silver is very low, middle warm area these
Valuable metal is volatized in flue, is again oxidized to zno, pbo, ag in flue2O is recovered in the form of an oxide, that is,
Obtain the flue dust containing zinc oxide, lead oxide and silver oxide, and iron compound occurs preliminary reduction in middle warm area, is then contained
Iron material enters high-temperature region (high-temperature region controls temperature by burner) and carries out drastic reduction, the fe in ferrous material3o4、fe2o3、
The oxide of the iron such as feo is reduced into metallic iron, finally gives the metallized pellet of degree of metalization more than 90%.
Inventor finds, using rotary hearth furnace, the mixing pelletizing after red mud and Zinc volatilization kiln slag mixed pelletizing is carried out with also original place
Reason, in the middle warm area of rotary hearth furnace, mixing pelletizing in lead zinc-silver compound be reduced to simple substance, and be volatized into flue with
Oxide form is recovered, and the iron compound in the middle warm area mixing pelletizing of rotary hearth furnace is reduced and is assembled by metallic iron simple substance
Long greatly metallized pellet, and the al during individually processing red mud in prior art, in red mud2o3、cao、sio2, mgo etc.
Oxide easily forms the compound of low melting point under the high temperature conditions, and the compound viscosity of these low melting points is larger, and impact is red
The reduction of iron and gathering in mud, this is also a difficult problem of pyrogenic attack red mud, but passes through red mud and zinc in the application
Volatilization kiln slag carries out mixed pelletizing, and in reduction process, reducing the metallic iron obtaining in Zinc volatilization kiln slag can promote as crystal seed
Enter in red mud the gathering of iron and grow up, short grained Zinc volatilization kiln slag can play skeleton function to pelletizing it is ensured that ball simultaneously
Group's intensity under the high temperature conditions, such that it is able to significantly improve the degree of metalization (reaching more than 90%) of gained metallized pellet.
According to an embodiment of the present utility model, the temperature of middle warm area can be 1100～1200 degrees Celsius, high-temperature region
Temperature can be 1200～1250 degrees Celsius.Inventor finds, this condition can be significantly better than other and improve waving of lead zinc-silver
The rate of sending out and the organic efficiency of iron.
According to embodiment of the present utility model, mill ore magnetic selection device 700 has metallized pellet entrance 701, metal iron powder
Outlet 702 and mine tailing outlet 703, metallized pellet entrance 701 is connected with metallized pellet outlet 603, and is suitable to metallize
Pelletizing carries out mill ore magnetic selection, obtains metal iron powder and mine tailing.Specifically, after will be cooled for gained metallized pellet, broken, levigate
Carry out magnetic separation and process the separation that can achieve metal iron powder and tailings, and the grade of obtained metal iron powder reach 86% with
On.
The system of the comprehensive utilization Zinc volatilization kiln slag according to the utility model embodiment and red mud is by waving red mud and zinc
Send out kiln slag collocation and carry out mixed pelletizing, because the caking property of red mud itself is it is not necessary to extra addition binding agent, obtained ball
Group still has higher intensity (fall strength of briquette reaches 8～10 times), cannot individually balling-up such that it is able to solve Zinc volatilization kiln slag
A difficult problem, simultaneously because containing substantial amounts of surplus carbon in Zinc volatilization kiln slag, therefore can be with rotary hearth furnace directly to red mud and Zinc volatilization kiln slag
Mixing pelletizing after mixed pelletizing carries out reduction treatment, adds reducing agent without extra, in rotary hearth furnace, in mixing pelletizing
Lead zinc-silver compound be reduced to simple substance, and be volatized into flue and be recovered in the form of an oxide, and mix in pelletizing
It is metallized pellet that iron compound is reduced by metallic iron simple substance agglomeration, and individually processes the process of red mud in prior art
In, al in red mud2o3、cao、sio2, the oxide such as mgo easily form the compound of low melting point under the high temperature conditions, and these
The compound viscosity of low melting point is larger, the reduction of iron and gathering in impact red mud, and this is also a difficulty of pyrogenic attack red mud
Topic, but by red mud and Zinc volatilization kiln slag are carried out mixed pelletizing in the application, in reduction process, in Zinc volatilization kiln slag also
The former metallic iron obtaining as the gathering of iron in crystal seed promotion red mud and can be grown up, and short grained Zinc volatilization kiln slag can simultaneously
Skeleton function is played to pelletizing it is ensured that pelletizing intensity under the high temperature conditions, such that it is able to significantly improve gained metallization ball
Group degree of metalization (reaching more than 90%), and through follow-up mill ore magnetic selection be separable obtain metal iron powder, in addition red mud be alkali
Property slag, with acid Zinc volatilization kiln slag collocation, it is possible to reduce the erosion to equipment.Thus, the system using the application can be from
The valuable metals such as lead zinc-silver lead are reclaimed, thus realizing the recycling of kiln slag and red mud that volatilizees in Zinc volatilization kiln slag and red mud.
Understand for convenience, below with reference to Fig. 3 to using the utility model embodiment comprehensive utilization Zinc volatilization kiln slag and
The system of red mud implements comprehensive utilization Zinc volatilization kiln slag and the method for red mud is described in detail.According to enforcement of the present utility model
Example, the method includes:
S100: Zinc volatilization kiln slag is carried out drying and processing
In this step, Zinc volatilization kiln slag is carried out drying and processing, obtain Zinc volatilization kiln slag siccative.Specifically, Zinc volatilization kiln
Slag is the leached mud coke powder with addition of 40～50% again during zinc hydrometallurgy, after extracting the metals such as zinc, lead under high temperature in rotary kiln
Residue, its all iron content be 20～40%, Zn content be 1～5%, lead content be 0.8～2%, silver content be 100～
150g/t, metallic iron accounts for water content in the 40～60% of all iron content, and the Zinc volatilization kiln slag siccative obtaining and is not higher than 2%.
S200: Zinc volatilization kiln slag siccative is carried out break process
In this step, Zinc volatilization kiln slag siccative obtained above is carried out break process, obtains Zinc volatilization kiln slag broken material.
According to an embodiment of the present utility model, the particle diameter of Zinc volatilization kiln slag broken material is not particularly restricted, people in the art
Member can be selected, according to actual needs according to specific embodiment of the utility model, the particle diameter of Zinc volatilization kiln slag broken material
Can be 1～3mm.Inventor finds, Zinc volatilization kiln slag broken material particle diameter is slightly unfavorable for lead zinc-silver during sequential reduction excessively
Volatilization, and particle diameter is meticulous leads to the poor air permeability of pelletizing so that the obtained pelletizing porosity is low, thus affecting lead zinc-silver iron
Reduction efficiency.
S300: red mud is carried out drying and processing
In this step, red mud is carried out drying and processing, obtain red mud siccative.Specifically, in red mud iron content be 23～
Water content in 30%, and obtained red mud siccative is not higher than 2%.
S400: red mud siccative is carried out break process
In this step, red mud siccative obtained above is carried out break process, obtains red mud broken material.New according to this practicality
One embodiment of type, the particle diameter of red mud broken material is not particularly restricted, and those skilled in the art can be according to actual needs
Selected, according to specific embodiment of the utility model, the particle diameter of red mud broken material can be not higher than 75 microns.Invention human hair
Existing, the particle diameter of red mud broken material is too high will not to have the effect of binding agent, and contribute to iron in red mud compared with the red mud of fine grain
Reduction.
S500: Zinc volatilization kiln slag broken material is carried out mixed pelletizing with red mud broken material and water
In this step, Zinc volatilization kiln slag broken material obtained above is carried out mixed pelletizing with red mud broken material and water, obtains
To mixing pelletizing.Inventor finds, by red mud broken material and the collocation of Zinc volatilization kiln slag broken material are carried out mixed pelletizing, due to
It is not necessary to extra addition binding agent, obtained pelletizing still has higher intensity and (falls strong for the caking property of red mud itself
Degree reaches 8～10 times), such that it is able to solve Zinc volatilization kiln slag cannot independent balling-up a difficult problem, simultaneously because containing in Zinc volatilization kiln slag
There is substantial amounts of surplus carbon, therefore the mixing pelletizing after red mud and Zinc volatilization kiln slag mixed pelletizing can be directly fed in rotary hearth furnace
Carry out reduction treatment, add reducing agent without extra, secondly Zinc volatilization kiln slag and red mud large or fine granule are arranged in pairs or groups it is ensured that
The gas permeability of pelletizing, and improve the thermodynamics and kineticses condition of reduction process, thus while reducing processing cost
Realize red mud and the recycling of Zinc volatilization kiln slag.
According to an embodiment of the present utility model, the mixed proportion of Zinc volatilization kiln slag broken material and red mud broken material and water
It is not particularly restricted, those skilled in the art can be selected according to actual needs, according to concrete reality of the present utility model
Apply example, Zinc volatilization kiln slag broken material and red mud broken material and water can be 100:(150～200 according to mass ratio): (25～
45) carry out mixed pelletizing.Inventor finds, can ensure that in mixing pelletizing, superfluous carbon ratio is in 1.5-1.8 under this mixed proportion
Between, such that it is able to significantly improve the reduction efficiency of lead zinc-silver iron during sequential reduction, and obtained pelletizing have
Higher intensity.Specifically, using ball press or pelletizer, Zinc volatilization kiln slag broken material and red mud broken material and water can be entered
Row mixed pelletizing.
S600: mixing pelletizing is supplied feed zone to rotary hearth furnace so that mixing pelletizing sequentially passes through the preheating of rotary hearth furnace
Area, middle warm area and high-temperature region are reduced
In this step, by obtained above mixing pelletizing supply to rotary hearth furnace feed zone so that mixing pelletizing warp successively
Cross preheating zone, middle warm area and the high-temperature region of rotary hearth furnace, preheating zone keeping temperature under the heat radiation of middle warm area and high-temperature region is 600
～900 DEG C, pelletizing is heated in this area and dries, and subsequently in middle warm area, middle warm area controls temperature by burner, realizes mixing
The reduction of lead zinc-silver oxide in pelletizing, because the saturated vapor pressure of lead these valuable metals of zinc-silver is very low, middle warm area these
Valuable metal is volatized in flue, is again oxidized to zno, pbo, ag in flue2O is recovered in the form of an oxide, that is,
Obtain the flue dust containing zinc oxide, lead oxide and silver oxide, and iron compound occurs preliminary reduction in middle warm area, is then contained
Iron material enters high-temperature region (high-temperature region controls temperature by burner) and carries out drastic reduction, the fe in ferrous material3o4、fe2o3、
The oxide of the iron such as feo is reduced into metallic iron, finally gives the metallized pellet of degree of metalization more than 90%.
Inventor finds, using rotary hearth furnace, the mixing pelletizing after red mud and Zinc volatilization kiln slag mixed pelletizing is carried out with also original place
Reason, in the middle warm area of rotary hearth furnace, mixing pelletizing in lead zinc-silver compound be reduced to simple substance, and be volatized into flue with
Oxide form is recovered, and the iron compound in the middle warm area mixing pelletizing of rotary hearth furnace is reduced and is assembled by metallic iron simple substance
Long greatly metallized pellet, and the al during individually processing red mud in prior art, in red mud2o3、cao、sio2, mgo etc.
Oxide easily forms the compound of low melting point under the high temperature conditions, and the compound viscosity of these low melting points is larger, and impact is red
The reduction of iron and gathering in mud, this is also a difficult problem of pyrogenic attack red mud, but passes through red mud and zinc in the application
Volatilization kiln slag carries out mixed pelletizing, and in reduction process, reducing the metallic iron obtaining in Zinc volatilization kiln slag can promote as crystal seed
Enter in red mud the gathering of iron and grow up, short grained Zinc volatilization kiln slag can play skeleton function to pelletizing it is ensured that ball simultaneously
Group's intensity under the high temperature conditions, such that it is able to significantly improve the degree of metalization (reaching more than 90%) of gained metallized pellet.
According to an embodiment of the present utility model, the temperature of middle warm area can be 1100～1200 degrees Celsius, high-temperature region
Temperature can be 1200～1250 degrees Celsius.Inventor finds, this condition can be significantly better than other and improve waving of lead zinc-silver
The rate of sending out and the organic efficiency of iron.
S700: metallized pellet is carried out mill ore magnetic selection
In this step, metallized pellet is carried out mill ore magnetic selection, obtain metal iron powder and mine tailing.Specifically, by gained gold
Belong to pellet cooled, broken, levigate after carry out magnetic separation and process the separation that can achieve metal iron powder and tailings, and obtained
The grade of metal iron powder reach more than 86%.
The method of the comprehensive utilization Zinc volatilization kiln slag according to the utility model embodiment and red mud is by waving red mud and zinc
Send out kiln slag collocation and carry out mixed pelletizing, because the caking property of red mud itself is it is not necessary to extra addition binding agent, obtained ball
Group still has higher intensity (fall strength of briquette reaches 8～10 times), cannot individually balling-up such that it is able to solve Zinc volatilization kiln slag
A difficult problem, simultaneously because containing substantial amounts of surplus carbon in Zinc volatilization kiln slag, therefore can be by after red mud and Zinc volatilization kiln slag mixed pelletizing
Mixing pelletizing be directly fed in rotary hearth furnace carry out reduction treatment, add reducing agent without extra, in rotary hearth furnace, mix
The lead zinc-silver compound closing in pelletizing is reduced to simple substance, and is volatized into flue and is recovered in the form of an oxide, and mixes
It is metallized pellet that iron compound in pelletizing is reduced by metallic iron simple substance agglomeration, and individually processes red in prior art
Al during mud, in red mud2o3、cao、sio2, the oxide such as mgo easily form the chemical combination of low melting point under the high temperature conditions
Thing, and the compound viscosity of these low melting points is larger, the reduction of iron and gathering in impact red mud, this is also pyrogenic attack red mud
A difficult problem, but by red mud and Zinc volatilization kiln slag are carried out mixed pelletizing in the application, in reduction process, zinc volatilizees
Reduce the metallic iron obtaining in kiln slag as the gathering of iron in crystal seed promotion red mud and to grow up, short grained zinc is waved simultaneously
Send out kiln slag and can play skeleton function to pelletizing it is ensured that pelletizing intensity under the high temperature conditions, such that it is able to significantly improve gained
The degree of metalization (reaching more than 90%) of metallized pellet, and through follow-up mill ore magnetic selection be separable obtain metal iron powder, in addition
Red mud is basic slag, with acid Zinc volatilization kiln slag collocation, it is possible to reduce the erosion to equipment.Thus, using the side of the application
Method can reclaim the valuable metals such as lead zinc-silver lead from Zinc volatilization kiln slag and red mud, thus realizing the resource of kiln slag and red mud of volatilizing
Change and utilize.
As described above, choosing can be had according to the comprehensive utilization Zinc volatilization kiln slag of the utility model embodiment and the method for red mud
At least one from following advantage:
The method of the comprehensive utilization Zinc volatilization kiln slag according to the utility model embodiment and red mud can realize Zinc volatilization kiln
Recycle while slag and red mud.
The method of the comprehensive utilization Zinc volatilization kiln slag according to the utility model embodiment and red mud adds reduction without extra
Agent, using the excess carbon just reduction reaction in volatilization kiln slag.
The red mud that the method for the comprehensive utilization Zinc volatilization kiln slag according to the utility model embodiment and red mud adopts is not only
Raw material but also be binding agent it is ensured that the intensity of pelletizing.
The method of the comprehensive utilization Zinc volatilization kiln slag according to the utility model embodiment and red mud passes through just kiln slag and red
Mud is crushed to below 3mm and 200 mesh respectively, and material thickness is arranged in pairs or groups it is ensured that pelletizing has good gas permeability.
Below with reference to specific embodiment, the utility model is described, it should be noted that these embodiments are only
Descriptive, and limit the utility model never in any form.
Embodiment 1
Iron content 25% in Zinc volatilization kiln slag, wherein metallic iron account for full iron 50%, and pb content is 1%, zn content is 3%, ag
Content is 120g/t, c content 35%；Iron content in red mud is 30%, and Zinc volatilization kiln slag and red mud are carried out at drying respectively
Reason, obtains Zinc volatilization kiln slag siccative and red mud siccative, and then respectively Zinc volatilization kiln slag siccative and red mud siccative are carried out with broken place
Reason, obtains Zinc volatilization kiln slag broken material (particle diameter is 1-3mm) and red mud broken material (particle diameter is 75 microns), then by Zinc volatilization kiln
The ratio for 100:195:25 carries out batch mixing pressure ball it is ensured that mistake in pelletizing according to mass ratio for slag broken material and red mud broken material and water
Then gained pelletizing moisture dried to after less than 2% the feed zone supplying to rotary hearth furnace by surplus carbon ratio 1.6, and warp successively
Cross rotary hearth furnace preheating zone, middle warm area and high-temperature region, wherein preheating zone is maintained the temperature at by the heat radiation of middle warm area and high-temperature region
600-900 DEG C, middle warm area and high-temperature region are respectively provided with heat-accumulating burner, and temperature is respectively 1150 ± 10 DEG C and 1210 ± 10 DEG C,
Recovery time is 45min, and the valuable metal lead zinc-silver in pelletizing in reduction process is reduced removing in middle warm area, in middle warm area cigarette
The dust of zno grade more than 62% can be collected in road, contain silver-colored 2000g/t in this dust, reduce later metallization ball
In group, the content of lead zinc drops to less than 0.8%, silver content 20g/t, and the removal efficiency of lead and zinc is respectively 93.00% and 94.12%,
Gained metallized pellet through supercooling, be crushed to below 2mm and carry out mill ore magnetic selection, Iron grade more than 86% can be obtained, iron returns
The high diametan of yield 78%.
Embodiment 2
Iron content 30% in Zinc volatilization kiln slag, wherein metallic iron account for full iron 56%, and pb content for 1.5%, zn content is
3.5%, ag content is 130g/t, c content 30%；Iron content in red mud is 25%, and Zinc volatilization kiln slag and red mud are entered respectively
Row drying and processing, obtains Zinc volatilization kiln slag siccative and red mud siccative, then respectively Zinc volatilization kiln slag siccative and red mud siccative is entered
Row break process, obtains Zinc volatilization kiln slag broken material (particle diameter is 1-3mm) and red mud broken material (particle diameter is 75 microns), then will
Zinc volatilization kiln slag broken material and red mud broken material and water according to mass ratio the ratio for 100:183:35 carry out batch mixing pressure ball it is ensured that
In pelletizing, then gained pelletizing moisture dried to after less than 2% the feed zone supplying to rotary hearth furnace by superfluous carbon ratio 1.7, and
And sequentially passing through rotary hearth furnace preheating zone, middle warm area and high-temperature region, wherein preheating zone is protected by the heat radiation of middle warm area and high-temperature region
Hold temperature at 600-900 DEG C, middle warm area and high-temperature region are respectively provided with heat-accumulating burner, temperature is respectively 1150 ± 10 DEG C and 1210
± 10 DEG C, the recovery time is 45min, and the valuable metal lead zinc-silver in pelletizing in reduction process is reduced removing in middle warm area,
The dust of zno grade more than 64% can be collected in middle warm area flue, in this dust, contain silver-colored 2150g/t, reduction is later
In metallized pellet, the content of lead zinc drops to less than 0.5%, silver content 15g/t, and the removal efficiency of lead and zinc is respectively 94.21% He
93.75%, gained metallized pellet through supercooling, be crushed to below 2mm and carry out mill ore magnetic selection, can obtain Iron grade 87% with
On, the high diametan of iron recovery 80%.
Embodiment 3
Iron content 35% in Zinc volatilization kiln slag, wherein metallic iron account for full iron 53%, and pb content is 2%, zn content is 5%, ag
Content is 140g/t, c content 33%；Iron content in red mud is 28%, and Zinc volatilization kiln slag and red mud are carried out at drying respectively
Reason, obtains Zinc volatilization kiln slag siccative and red mud siccative, and then respectively Zinc volatilization kiln slag siccative and red mud siccative are carried out with broken place
Reason, obtains Zinc volatilization kiln slag broken material (particle diameter is 1-3mm) and red mud broken material (particle diameter is 75 microns), then by Zinc volatilization kiln
The ratio for 100:165:45 carries out batch mixing pressure ball it is ensured that mistake in pelletizing according to mass ratio for slag broken material and red mud broken material and water
Then gained pelletizing moisture dried to after less than 2% the feed zone supplying to rotary hearth furnace by surplus carbon ratio 1.8, and warp successively
Cross rotary hearth furnace preheating zone, middle warm area and high-temperature region, wherein preheating zone is maintained the temperature at by the heat radiation of middle warm area and high-temperature region
600-900 DEG C, middle warm area and high-temperature region are respectively provided with heat-accumulating burner, and temperature is respectively 1180 ± 10 DEG C and 1230 ± 10 DEG C,
Recovery time is 45min, and the valuable metal lead zinc-silver in pelletizing in reduction process is reduced removing in middle warm area, in middle warm area cigarette
The dust of zno grade more than 65% can be collected in road, contain silver-colored 2300g/t in this dust, reduce later metallization ball
In group, the content of lead zinc drops to less than 0.3%, silver content 10g/t, and the removal efficiency of lead and zinc is respectively 95.72% and 96.33%,
Gained metallized pellet through supercooling, be crushed to below 2mm and carry out mill ore magnetic selection, Iron grade more than 88% can be obtained, iron returns
The high diametan of yield 82%.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy describing with reference to this embodiment or example
Point is contained at least one embodiment of the present utility model or example.In this manual, the schematic table to above-mentioned term
State and be necessarily directed to identical embodiment or example.And, the specific features of description, structure, material or feature are permissible
Any one or more embodiments or example combine in an appropriate manner.Additionally, in the case of not conflicting, this area
Technical staff the feature of the different embodiments described in this specification or example and different embodiment or example can be entered
Row combines and combines.
Although of the present utility model embodiment has been shown and described above it is to be understood that above-described embodiment is
Exemplary it is impossible to be interpreted as that those of ordinary skill in the art is in scope of the present utility model to restriction of the present utility model
Interior above-described embodiment can be changed, change, replacing and modification.
Claims (2)
1. the system of a kind of comprehensive utilization Zinc volatilization kiln slag and red mud is it is characterised in that include:
Zinc volatilization kiln slag drying unit, described Zinc volatilization kiln slag drying unit has Zinc volatilization kiln slag entrance and Zinc volatilization kiln slag is done
Material outlet；
Zinc volatilization kiln slag crushing device, described Zinc volatilization kiln slag crushing device has Zinc volatilization kiln slag siccative entrance and Zinc volatilization kiln
Slag broken material exports, and described Zinc volatilization kiln slag siccative entrance is connected with described Zinc volatilization kiln slag drier outlet；
Red mud drying unit, described red mud drying unit has red mud entrance and red mud drier outlet；
Red mud breaker, described red mud breaker has red mud siccative entrance and the outlet of red mud broken material, and described red mud is done
Material entrance is connected with described red mud drier outlet；
Mixed pelletizing device, described mixed pelletizing device has Zinc volatilization kiln slag broken material entrance, red mud broken material entrance, water enter
Mouth and mixing pelletizing outlet, described Zinc volatilization kiln slag broken material entrance is connected with the outlet of described Zinc volatilization kiln slag broken material, described
Red mud broken material entrance is connected with the outlet of described red mud broken material；
Rotary hearth furnace, in described rotary hearth furnace along furnace bottom rotation direction sequentially form feed zone, preheating zone, middle warm area, high-temperature region and
Discharge zone, described feed zone is provided with mixing pelletizing entrance, and described middle warm area is provided with flue dust outlet, and described discharge zone is provided with
Metallized pellet exports, and described mixing pelletizing entrance is connected with the outlet of described mixing pelletizing；
Mill ore magnetic selection device, described mill ore magnetic selection device has metallized pellet entrance, metal iron powder outlet and mine tailing outlet, institute
State metallized pellet entrance to be connected with the outlet of described metallized pellet.
2. system according to claim 1 is it is characterised in that described mixed pelletizing device is ball press or pelletizer.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110760673A (en) * | 2019-11-19 | 2020-02-07 | 河池学院 | Zinc leaching residue volatilizing kiln treatment method |
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| CN110760673A (en) * | 2019-11-19 | 2020-02-07 | 河池学院 | Zinc leaching residue volatilizing kiln treatment method |
| CN110760673B (en) * | 2019-11-19 | 2021-06-01 | 河池学院 | Zinc leaching residue volatilizing kiln treatment method |
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