CN205907330U - Direct reduction lead slag's processing system - Google Patents
Direct reduction lead slag's processing system Download PDFInfo
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- CN205907330U CN205907330U CN201620830513.XU CN201620830513U CN205907330U CN 205907330 U CN205907330 U CN 205907330U CN 201620830513 U CN201620830513 U CN 201620830513U CN 205907330 U CN205907330 U CN 205907330U
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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 direct reduction lead slag's treatment system, include: breaker, mix make that the football shirt is put, drying device, rotary hearth furnace, bismuth oxide flue, zinc oxide flue, lead oxide flue and melting furnace, wherein, mix make the football shirt put lead slag granule entry has, reductant entry, binder entry, water entry and the export of lead slag pelletizing, lead slag granule entry links to each other with breaker's lead slag grain exports, drying device's lead slag pelletizing entry links to each other with the export of lead slag pelletizing, be intake zone, low warm area, well warm area, high -temperature region and ejection of compact district in proper order according to the raw materials direction of motion in the rotary hearth furnace, the rotary hearth furnace has dry lead slag pelletizing entry, the export of metal bismuth, the export of metal zinc, lead oxide export, metallized pellet export, the bismuth oxide flue links to each other with the export of metal bismuth, the zinc oxide flue links to each other with the export of metal zinc, the lead oxide flue links to each other with the lead oxide export. Adopt this system can realize zinc oxide, lead oxide, bismuth oxide and metallic iron simultaneously retrieves from this simultaneously.
Description
Technical field
The utility model belongs to metallurgical and energy field and in particular to being reduced directly the processing system of lead skim.
Background technology
Direct-reduction lead skim is the metallurgical slag producing during direct refining lead.Lead smelting in China industrial technology is more, cuts
Only to the end of the year 2012, there are 300 Duo Jia lead smelting enterprises in the whole nation, and these enterprise's production capacities are not concentrated, and produces more than 100,000 tons of enterprise per year
Less than 10%.Wherein more than 85% enterprise adopts thermal process.Pyrometallurgical smelting of lead technique has traditional sintering-blast furnace process,
But due to sintering system, to have a series of shortcomings such as energy consumption is big, seriously polluted substantially superseded at present.Present more than 60% enterprise
Industry uses reduction-oxidation-blast furnace process (Shuikoushan method), although this technique solves the pollution of sintering system, energy
Consumption is higher, is gradually replaced by Direct Reduction Technology.
Domestic direct refining splicer's skill mainly has: oxygen bottom blowing oxidation-bottom blowing reduction-fuming and oxygen bottom blowing aoxidize-and side-blown
Two kinds of techniques of reduction-fuming, compared with traditional pyrometallurgical smelting of lead technique, direct-reduction lead technology its have energy consumption low, pollution little
With series of advantages such as automaticity height.But whether side-blown or bottom blowing process lead skim out contains tfe22-
The valuable metals such as 26%, pb2.0-4.0%, zno14%-23%, bi (0.3-1.2%), reducing slag through fuming furnace collect lead,
Zinc and bismuth, finishing slag can be used as the raw material producing cement.
Because direct refining splicer's skill has above-described series of advantages, so progressively replacing traditional Shuikoushan
Method, but directly refining splicer's skill also has certain defect, in general, direct-reduction in the control process of reducing slag lead content
Lead content in slag is higher than slag lead content out in blast furnace, and content is unstable, and great majority need at fuming furnace
Reason.Additionally, because lead ore and the zinc ore overwhelming majority are associated minerals that is to say, that the concentrate of lead sulfide ore smelted as lead also has one
Quantitative zinc sulphide, these zinc eventually enter into reducing slag, collect through fuming furnace.Fuming furnace be only capable of collecting lead, zinc, bismuth mixed
Close dust, do not separate further, and fuming slag out contains substantial amounts of iron by fuming furnace, the slag of these iron content is finally made
Throw away for waste or and its low price sell cement plant, this is the significant wastage to resource.
Therefore, the process for direct-reduction lead skim need to improve further at present.
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 a kind of processing system of the direct-reduction lead skim with quick, recyclable various metals with a new purpose.
According to one side of the present utility model, the utility model proposes a kind of processing system of direct-reduction lead skim, should
System includes:
Breaker, described breaker has direct-reduction lead skim entrance and lead skim particle outlet；
Mixed pelletizing device, described mixed pelletizing device have lead skim particle entrance, reducing agent entrance, binding agent entrance,
Water inlet and the outlet of lead skim pelletizing, described lead skim particle entrance is connected with described lead skim particle outlet；
Drying device, described drying device has lead skim pelletizing entrance and lead skim pelletizing outlet, described lead skim pelletizing is dried
Entrance is connected with the outlet of described lead skim pelletizing；
Rotary hearth furnace, is followed successively by feed zone, low-temperature space, middle warm area, high-temperature region according to the raw material direction of motion in described rotary hearth furnace
And discharge zone, described feed zone has lead skim pelletizing entrance is dried, and described low-temperature space has bismuth metal outlet, described middle warm area tool
Metallic zinc is had to export, described high-temperature region has lead oxide outlet, described discharge zone has metallized pellet outlet, described lead is dried
Slag pelletizing entrance with described be dried lead skim pelletizing outlet be connected；
Bismuth oxide flue, described bismuth oxide flue is connected with the outlet of described bismuth metal；
Zinc oxide flue, described zinc oxide flue is connected with the outlet of described metallic zinc；
Lead oxide flue, described lead oxide flue is connected with the outlet of described lead oxide；
Molten point of stove, a described molten point stove has metallized pellet entrance, metallic iron outlet and melting slag outlet, described metallization
Pelletizing entrance is connected with the outlet of described metallized pellet.
Thus can be realized directly using the processing system of the direct-reduction lead skim of the utility model above-described embodiment simultaneously
In reduction lead skim, iron, lead, zinc and bismuth is separately recovered.Save the fuming furnace apparatus during direct refining splicer's skill, simultaneously also
During former lead skim, from discharge zone, metallized pellet out is sent directly in molten point of stove of combustion gas, realizes under the high temperature conditions
The separation of iron and slag, it is achieved that resource recycling, reduces production cost, has significantly economic benefit and social benefit.
In addition, the processing system according to the processing system of the direct-reduction lead skim of the utility model above-described embodiment is acceptable
Have as follows add technical characteristic:
In the utility model, the processing system of the direct-reduction lead skim of above-described embodiment further includes:
First bagroom, described first bagroom is connected with described bismuth oxide flue, and is suitable to collect oxidation
Bismuth.The bismuth metal being obtained by the first reduction in low-temperature space is entered in the bismuth oxide flue being connected with low-temperature space and the first oxygen occurs
Change reaction, obtain bismuth oxide.Using the first bagroom, the flue gas containing bismuth oxide in bismuth oxide flue was filtered
Dirt, can effectively reclaim and obtain bismuth oxide, avoid air pollution simultaneously.
Second bagroom, described second bagroom is connected with described zinc oxide flue, and is suitable to collect oxidation
Zinc.The metallic zinc being obtained by the second reduction in middle warm area is entered in the zinc oxide flue being connected with middle warm area and the second oxygen occurs
Change reaction, obtain zinc oxide.Using the second bagroom, the flue gas containing zinc oxide in zinc oxide flue was filtered
Dirt, can effectively reclaim and obtain zinc oxide, avoid air pollution simultaneously.
3rd bagroom, described 3rd bagroom is connected with described lead oxide flue, and is suitable to collect oxidation
Lead.The lead oxide being obtained by the 3rd reduction in high-temperature region is entered in the lead oxide flue being connected with high-temperature region.Using the 3rd cloth
Bag collector carries out dust removal by filtration to the flue gas containing lead oxide in lead oxide flue, can effectively reclaim and obtain lead oxide,
Avoid air pollution simultaneously.
In the utility model, a described molten point stove has calcium oxide entrance further.Calcium oxide entrance thus can be passed through
Add calcium oxide into molten point of stove, and then adjust the basicity melting point slag, slag sluicing system during promoting molten point.Specifically, may be used
To adjust the basicity of molten point of slag with the calcium oxide adding 12-15%.
Brief description
Fig. 1 is the structural representation of the processing system of the direct-reduction lead skim according to one embodiment of the utility model.
Fig. 2 is the structural representation of the processing system of the direct-reduction lead skim according to another embodiment of the utility model.
Fig. 3 is the flow chart of the processing method of the direct-reduction lead skim according to one embodiment of the utility model.
Fig. 4 is the flow chart of the processing method of the direct-reduction lead skim according to another embodiment of the utility model.
Specific embodiment
Embodiment of the present utility model is described below in detail, the example of embodiment is shown in the drawings, wherein from start to finish
The element that same or similar label represents same or similar element or has same or like function.Below with reference to attached
The embodiment of figure description is exemplary it is intended to be used for explaining the utility model, and it is not intended that to limit of the present utility model
System.
According to one side of the present utility model, the utility model proposes a kind of processing system for being reduced directly lead skim
System.Describe the processing system of the direct-reduction lead skim of the utility model specific embodiment below with reference to Fig. 1-2 in detail.
The processing system of the direct-reduction lead skim according to specific embodiment of the utility model includes: breaker 100, mixed
Close palletizing device 200, drying device 300, rotary hearth furnace 400, bismuth oxide flue 500, zinc oxide flue 600, lead oxide flue 700
With molten point of stove 800.
As shown in figure 1, breaker has direct-reduction lead skim entrance 101 and lead skim particle outlet 102；Mixed pelletizing fills
Put and export 205 with lead skim particle entrance 201, reducing agent entrance 202, binding agent entrance 203, water inlet 204 and lead skim pelletizing,
Lead skim particle entrance 201 is connected with lead skim particle outlet 102；Drying device 300 has lead skim pelletizing entrance 301 and lead skim is dried
Pelletizing outlet 302, described lead skim pelletizing entrance 301 is connected with described lead skim pelletizing outlet 205；
As shown in figure 4, being followed successively by feed zone 401, low-temperature space 402, middle warm area according to the raw material direction of motion in rotary hearth furnace
403rd, high-temperature region 404 and discharge zone 405, feed zone 401 has lead skim pelletizing entrance 406 is dried, and low-temperature space has bismuth metal and goes out
Mouth 407, middle warm area has metallic zinc outlet 408, and high-temperature region has lead oxide outlet 409, and discharge zone 405 has metallized pellet
Outlet 410, is dried lead skim pelletizing entrance 406 and is connected with lead skim pelletizing outlet 302；
As shown in figure 4, bismuth oxide flue 500 is connected with bismuth metal outlet 407；Zinc oxide flue 600 and metallic zinc outlet
408 are connected；Lead oxide flue 700 is connected with lead oxide outlet 409.
As shown in figure 1, a molten point stove 800 has metallized pellet entrance 801, metallic iron outlet 802 and melting slag outlet
803, metallized pellet entrance 801 is connected with metallized pellet outlet 410.
According to specific embodiment of the utility model, using above-described embodiment direct-reduction lead skim processing system to straight
Connect reduction lead skim to be processed, specifically can carry out according to the following step:
First, break process is carried out by being reduced directly lead skim using the breaker 100 in this processing system, obtain lead skim
Particle.Specifically can be by the Task-size Controlling of lead skim particle at no more than 1 millimeter.Therewith in mixed pelletizing device 200, by lead
Solid impurity particle carries out mixed pelletizing with reducing agent, binding agent and appropriate moisture, and obtains lead skim pelletizing.Secondly by lead skim pelletizing
It is dried process in drying device 300, obtain lead skim pelletizing is dried.Further, lead skim pelletizing will be dried and send into and turn bottom
In stove 100, make to be dried lead skim pelletizing and sequentially pass through the feed zone 401 of rotary hearth furnace, low-temperature space 402, middle warm area 403, high-temperature region 404
With discharge zone 405.
Wherein, in the low-temperature space 402 of rotary hearth furnace 400 can be with temperature setting for 700-900 degree Celsius, lead at this temperature
In slag pelletizing, bismuth oxide is reduced agent coal dust and is reduced into bismuth metal completely, and is evaporated completely, by bismuth oxide cigarette
Road 500 enters and is collected；The temperature of middle warm area 403 could be arranged to 900-1050 degree Celsius, at this temperature in lead skim pelletizing
Zinc oxide is reduced into metallic zinc, and volatile metallic zinc is in the zinc oxide flue 600 being connected with middle warm area 403 again by oxygen
Chemical conversion zinc oxide dust is simultaneously collected；Temperature in high-temperature region 404 could be arranged to 1050-1200 degree Celsius, at this temperature
In lead skim pelletizing, lead silicate is reduced into lead oxide by carbon, and is volatized in the lead oxide flue 700 that is connected with high-temperature region 404 simultaneously
It is collected.
Become by Carbon monoxide reduction with the ferrous oxide in the lead skim pelletizing of high-temperature region 404 in low-temperature space 402, middle warm area 403
Metallic iron, this metallized pellet is discharged by discharge zone 405 and is carried out molten office reason in molten point of stove 800, and obtains metallic iron.
Traditional direct-reduction lead skim fuming furnace technological process can only reclaim one of iron, zinc, bismuth or two kinds, need simultaneously
Fuming furnace to be added, not only reduction efficiency is low, and wastes more metals resources, and then indirectly increased the production of enterprise
Cost, reduce the economic benefit of enterprise.And the processing system of the direct-reduction lead skim of the utility model embodiment is according to difference
Metal has the characteristics that melting is different, arranges different warm areas, and then be simultaneously achieved iron, lead, zinc and bismuth etc. in rotary hearth furnace 400
Reclaim while metallic element.Further, by arranging metal oxide flue in different warm areas, realize to zinc oxide, oxygen
Change effective recovery of lead and bismuth oxide.Further, metallic iron is achieved under the high temperature conditions by the molten point stove 800 of setting
Reclaim, save production cost, there is significantly economic benefit.
The processing system of the direct-reduction lead skim according to the utility model specific embodiment further includes: the first cloth bag is received
Dirt device 900, the second bagroom 1000 and the 3rd bagroom 1100.
Wherein, the first bagroom 900 is connected with bismuth oxide flue 500, and is suitable to collect bismuth oxide.Thus utilize the
One bagroom 900 can be realized entering the collection of the bismuth oxide in bismuth oxide flue 500.Second bagroom 1000 with
Zinc oxide flue is connected, and is suitable to collect zinc oxide.Thus can effectively collect entrance oxygen using the second bagroom 100
Change the zinc oxide in zinc flue 600.3rd bagroom 1100 is connected with lead oxide flue 500, and is suitable to collect lead oxide.
Thus can effectively collect, using the 3rd bagroom 1100, the lead oxide entering in lead oxide flue 700.
According to specific embodiment of the utility model, a molten point stove 800 has calcium oxide entrance further.Thus melt a point stove to enter
One step has before calcium oxide entrance is conducive to for metallized pellet carrying out molten office reason, adds oxidation in metallized pellet
Calcium, is conducive to adjusting the basicity of molten point of slag, slag sluicing system during promoting molten point.
Understand the processing system of the direct-reduction lead skim of the utility model above-described embodiment for convenience, be somebody's turn to do to adopting below
The method that system is reduced directly lead skim is described.
The method includes: carries out break process using breaker by being reduced directly lead skim, to obtain lead skim particle；Profit
With mixed pelletizing device, lead skim particle is carried out mixed pelletizing with reducing agent, binding agent and water, to obtain lead skim pelletizing；Using
Lead skim pelletizing is dried process by drying device, to obtain lead skim pelletizing is dried；Lead skim pelletizing will be dried supply to turning bottom
The feed zone of stove, makes lead skim pelletizing sequentially pass through low-temperature space, middle warm area, high-temperature region and discharge zone, wherein, makes lead skim pelletizing is dried
There is the first reduction reaction in low-temperature space, and obtain bismuth metal, bismuth metal is entered in the bismuth oxide flue being connected with low-temperature space simultaneously
There is the first oxidation reaction, obtain bismuth oxide；Make lead skim pelletizing to be dried in middle warm area generation the second reduction reaction, and obtain metal
Zinc, metallic zinc is entered in the zinc oxide flue being connected with middle warm area and the second oxidation reaction occurs, and obtains zinc oxide；Make lead is dried
There is the 3rd reduction reaction in high-temperature region in slag pelletizing, and obtain lead oxide, the oxidation lead fume that lead oxide entrance is connected with high-temperature region
In road, obtain lead oxide and metallized pellet；Metallized pellet is carried out molten office reason in molten point of stove, to obtain metallic iron
And melting slag.
Traditional direct-reduction lead skim fuming furnace technological process can only reclaim one of iron, zinc, bismuth or two kinds, but also
Former efficiency is low, wastes more metals resources.The processing method of the direct-reduction lead skim of the utility model embodiment, according to not
Pass through the different warm areas of setting in rotary hearth furnace with the different melting feature of metal and can realize the metals such as iron, zinc, bismuth and lead unit simultaneously
Reclaim while plain, be connected by different warm areas setting metal oxide flue and with corresponding bagroom, realize
The recycling of bismuth oxide, zinc oxide and oxidation lead resource.Further, real under the high temperature conditions by molten point of stove of setting
Show the separation of slag iron, and effectively reclaim metallic iron.
Thus can be realized directly using the processing system of the direct-reduction lead skim of the utility model above-described embodiment simultaneously
In reduction lead skim, iron, lead, zinc and bismuth is separately recovered.Save the fuming furnace apparatus during direct refining splicer's skill, simultaneously also
During former lead skim, from discharge zone, metallized pellet out is sent directly in molten point of stove of combustion gas, realizes under the high temperature conditions
The separation of iron and slag, it is achieved that resource recycling, reduces production cost, has significantly economic benefit and social benefit.
According to specific embodiment of the utility model, describe the utility model specific embodiment in detail below with reference to Fig. 3-4
Utilization be reduced directly lead skim processing system process direct-reduction lead skim method.
S100: break process
According to specific embodiment of the utility model, using breaker, broken place will be carried out to direct-reduction lead skim first
Reason, to obtain lead skim particle.Thus direct-reduction lead skim is carried out with break process can effectively prevent direct-reduction lead skim from existing
It is susceptible to caking of reuniting in cooling procedure.
The granularity of the direct-reduction lead skim that the utility model is processed is 1-5mm, and inventor finds, direct-reduction lead skim is entered
Row is crushed to granularity and is not more than 1 millimeter, advantageously in solving the difficult problem that lead skim lumps in cooling procedure, is easy to follow-up balling-up
Process.
S200: mixed pelletizing
According to specific embodiment of the utility model, further, using mixed pelletizing device by lead skim particle and reduction
Agent, binding agent and water carry out mixed pelletizing, to obtain lead skim pelletizing.Thus can enter in order to the reduction of follow-up lead skim particle
And isolate bismuth metal, zinc, lead and iron.
According to specific embodiment of the utility model, the mass ratio of lead skim particle, reducing agent, binding agent and water is 100:
(18-24): (2-4): (8-11).Mass ratio thus in accordance with lead skim particle, reducing agent, binding agent and water is 100:(18-24):
(2-4): (8-11) carries out mixed pelletizing, lead skim pelletizing can not only be obtained, be more beneficial for improving metal reduction efficiency, save former material
Material reducing agent and the consumption of binding agent, reduce production cost, have significantly economic benefit.
According to specific embodiment of the utility model, reducing agent can be coal dust, thus can improve reduction effect further
Rate.Binding agent can be bentonite, thus can improve balling efficiency further.
S300: dried process
According to specific embodiment of the utility model, using drying device, lead skim pelletizing is dried process, so that
To lead skim pelletizing is dried；Thus it is dried and process the efficiency being conducive to improving sequential reduction reaction.
S400: rotary hearth furnace is reduced directly
According to specific embodiment of the utility model, supply lead skim pelletizing is dried to the feed zone of rotary hearth furnace, make drying
Lead skim pelletizing sequentially passes through low-temperature space, middle warm area, high-temperature region and discharge zone.Thus supply lead skim pelletizing is dried to rotary hearth furnace
Feed zone, making lead skim pelletizing sequentially pass through low-temperature space, middle warm area, high-temperature region and discharge zone, to be conducive to lead skim pelletizing to carry out a series of
Reduction reaction, and by each area of rotary hearth furnace arrange different temperatures region, realize metal oxide such as zinc oxide, lead oxide,
Bismuth oxide etc. is separately recovered.
According to specific embodiment of the utility model, make lead skim pelletizing to be dried in low-temperature space generation the first reduction reaction, and
Obtain bismuth metal, bismuth metal is entered in the bismuth oxide flue being connected with low-temperature space and the first oxidation reaction occurs, and obtains bismuth oxide.
According to specific example of the present utility model, lead skim pelletizing is dried and enters first the low-temperature space of rotary hearth furnace, in this region
Interior, the bismuth oxide being dried in lead skim pelletizing is reduced into bismuth metal first, and bismuth metal and flue gas together evaporate into and low-temperature space phase
In bismuth oxide flue even, in bismuth oxide flue, bismuth metal is oxidized to bismuth oxide again and is collected.
According to specific embodiment of the utility model, the temperature of the first reduction reaction is 700-900 degree Celsius.Invention human hair
Existing, bismuth oxide just can be reduced into bismuth metal by carbon under 700 degrees Celsius, and the fusing point of bismuth metal is 267 degrees Celsius.
Thus, it is 700-900 degree Celsius by controlling the temperature in low-temperature space, so that the bismuth oxide being dried in lead skim pelletizing
It is reduced into bismuth metal first.And bismuth metal is in volatileness at such a temperature, can together enter bismuth oxide flue with flue gas
In, thus bismuth metal is effectively separated.Therefore, the temperature controlling the first reduction reaction is 700-900 degree Celsius, not only can
Improve the rate of recovery of bismuth metal further, be also convenient for separating and collecting of bismuth metal simultaneously.
According to specific embodiment of the utility model, make lead skim pelletizing to be dried in described middle warm area generation second reduction instead
Should, and obtaining metallic zinc, metallic zinc is entered in the zinc oxide flue being connected with middle warm area and the second oxidation reaction occurs, and obtains oxygen
Change zinc.
According to specific example of the present utility model, the lead skim pelletizing being separated bismuth metal goes successively to the middle temperature of rotary hearth furnace
Area, in this region, the zinc oxide in lead skim pelletizing is reduced into metallic zinc, and metallic zinc and flue gas together evaporate into and middle warm area
In connected zinc oxide flue, in zinc oxide flue, metallic zinc is oxidized to zinc oxide again and is collected.
According to specific embodiment of the utility model, the temperature of the second reduction reaction is 900-1050 degree Celsius.Thus exist
Middle warm area, controls the temperature of the second reduction reaction to be 900-1050 degree Celsius, thus so that zinc oxide in lead skim pelletizing
It is reduced sufficiently generation metallic zinc, and metallic zinc is in volatileness at this temperature, and then can together enter oxygen with flue gas
Change in zinc flue, thus metallic zinc is effectively separated.Therefore, the temperature controlling the second reduction reaction is that 900-1050 is Celsius
Degree, not only can improve the rate of recovery of metallic zinc further, be also convenient for separating and collecting of metallic zinc simultaneously.
According to specific embodiment of the utility model, make lead skim pelletizing to be dried in high-temperature region generation the 3rd reduction reaction, and
Obtain lead oxide, lead oxide is entered in the lead oxide flue being connected with high-temperature region, obtains lead oxide and metallized pellet.
According to specific example of the present utility model, it is separated metallic zinc and the lead skim pelletizing of bismuth metal goes successively to turn bottom
The high-temperature region of stove, in this region, the lead silicate in lead skim pelletizing is reduced into lead oxide, and lead oxide is together evaporated into flue gas
In the lead oxide flue being connected with high-temperature region, it is collected in lead oxide flue.
According to specific embodiment of the utility model, the temperature of the 3rd reduction reaction is 1050-1200 degree Celsius.Thus exist
High-temperature region, controls the temperature of the 3rd reduction reaction to be 1050-1200 degree Celsius, thus so that lead silicate in lead skim pelletizing
It is reduced sufficiently into lead oxide under conditions of with the presence of ferrous oxide, and lead oxide is in volatileness at this temperature, enters
And together can enter in lead oxide flue with flue gas, thus lead oxide is effectively separated.Therefore, control the 3rd reduction reaction
Temperature be 1050-1200 degree Celsius, the rate of recovery of metallic lead not only can be improved further, be also convenient for simultaneously metallic lead point
From collection.
According to specific embodiment of the utility model, in low-temperature space, middle warm area and high-temperature region, except lead, zinc, bismuth removing
Outside, the ferrous oxide in lead skim pelletizing has also been reduced into metallic iron simultaneously, and obtains metallized pellet, is discharged by discharge zone
Rotary hearth furnace.
Thus, the utility model above-described embodiment direct-reduction lead skim processing method, dexterously make use of bismuth metal,
Zinc and lead there are different reduction temperatures, and the advantage of temperature can be separately provided with reference to each region of rotary hearth furnace,
Have effectively achieved zinc oxide in direct-reduction lead skim, lead oxide, being separately recovered of bismuth oxide and metallic iron.
S500: molten office reason
According to specific embodiment of the utility model, metallized pellet is carried out molten office reason in molten point of stove, so that
To metallic iron and melting slag.
According to specific embodiment of the utility model.The temperature control of molten office reason is 1550-1600 DEG C, and the time is 1-
1.5h.Molten component efficiency and iron recovery thus can be improved further.
According to specific embodiment of the utility model, before metallized pellet is carried out molten office reason, to metallization ball
The calcium oxide of 12-15 weight % is added in group.The basicity of molten point of slag thus can be adjusted, during promoting molten point, slag iron is divided
From improving the separative efficiency of metallic iron and iron recovery.
Embodiment 1
Process certain using the technological process of Fig. 1-2 and the processing system of Fig. 3-4 and be reduced directly lead skim, this direct-reduction lead
Slag ingredient is tfe26.45%, pbo2.32%, zno14.64%, bi0.45%.Direct-reduction lead skim and coal dust, bentonite and
Water is according to the ratio dispensing of 100:24:4:11.Material is sufficiently mixed after uniformly and carries out pelletizing, and the pelletizing pressing is in 200 DEG C of baking
Dry 2 hours in dry machine, the pelletizing of drying is distributed into rotary hearth furnace.Low-temperature space temperature control at 800 ± 10 DEG C, low-temperature space internal oxidition
Bismuth is reduced generation bismuth metal, and bismuth metal is volatized into flue and is again oxidized to bismuth oxide.Middle warm area temperature control exists
1050 DEG C ± 10 DEG C, middle warm area internal oxidition zinc is reduced generation metallic zinc, and metallic zinc volatilization is oxidized to zinc oxide in flue
It is collected.In high-temperature region, temperature is 1200 DEG C ± 10 DEG C, and in high-temperature region, lead silicate is decomposed into lead oxide, aoxidizes lead volatility.High
The flue of warm area can collect lead oxide.Major part ferrous oxide in high-temperature region is generated metallic iron by Carbon monoxide reduction simultaneously.
Metallized pellet is discharged in stove by discharge zone.The cao that thermal state metal pellet allocates 12% into adds combustion gas to melt a point stove, temperature 1600
DEG C, melt a point 1.5h, put respectively by slag tap
Embodiment 2
Process certain using the technological process of Fig. 1-2 and the processing system of Fig. 3-4 and be reduced directly lead skim, this direct-reduction lead
Slag ingredient is tfe23.52%, pbo3.96%, zno22.29%, bi1.08%.Lead skim and coal dust, bentonite and water according to
The ratio dispensing of 100:18:2:8.Material carries out pelletizing after being sufficiently mixed uniformly, and the pelletizing pressing dries in 200 DEG C of dryer
Dry 2 hours, the pelletizing of drying was distributed into rotary hearth furnace.At 800 ± 10 DEG C, low-temperature space internal oxidition bismuth is reduced low-temperature space temperature control
Generate bismuth metal, bismuth metal is volatized into flue and is again oxidized to bismuth oxide.Middle warm area temperature control 1050 DEG C ±
10 DEG C, middle warm area internal oxidition zinc is reduced generation metallic zinc, and metallic zinc volatilization is oxidized to zinc oxide in flue and is collected.
In high-temperature region, temperature is 1200 DEG C ± 10 DEG C, and in high-temperature region, lead silicate is decomposed into lead oxide, aoxidizes lead volatility.The flue of high-temperature region
Lead oxide can be collected.Major part ferrous oxide in high-temperature region is generated metallic iron by Carbon monoxide reduction simultaneously.Metallized pellet
Discharged in stove by discharge zone.The cao that thermal state metal pellet allocates 12% into adds combustion gas to melt a point stove, 1550 DEG C of temperature, melts a point 1h,
1550 DEG C of temperature, is put respectively by slag tap
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 ", " suitable
The orientation of instruction such as hour hands ", " counterclockwise ", " axial ", " radially ", " circumferential " or position relationship are based on orientation shown in the drawings
Or position relationship, be for only for ease of description the utility model and simplify description, rather than instruction or hint indication device or
Element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to limit of the present utility model
System.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or hint relative importance
Or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include one or more this feature.In description of the present utility model, " multiple " are meant that two or two
More than, unless otherwise expressly limited specifically.
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.For the ordinary skill in the art, can basis
Concrete condition understands concrete meaning in the utility model for the above-mentioned term.
In the utility model, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score
Can be the first and second feature directly contacts, or the first and second features pass through intermediary mediate contact.And, first is special
Levy second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only
Represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " permissible
Be fisrt feature immediately below second feature or obliquely downward, or be merely representative of fisrt feature level height and be less than second feature.
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 that be not necessarily referring to is identical embodiment or example.And, the specific features of description, structure, material or feature can be
Combine in an appropriate manner in any one or more embodiments or example.Additionally, in the case of not conflicting, this area
The feature of the different embodiments described in this specification or example and different embodiment or example can be carried out by technical staff
In conjunction with and combination.
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 (3)
1. a kind of processing system of direct-reduction lead skim is it is characterised in that include:
Breaker, described breaker has direct-reduction lead skim entrance and lead skim particle outlet；
Mixed pelletizing device, described mixed pelletizing device has lead skim particle entrance, reducing agent entrance, binding agent entrance, water enter
Mouth and the outlet of lead skim pelletizing, described lead skim particle entrance is connected with described lead skim particle outlet；
Drying device, described drying device has lead skim pelletizing entrance and lead skim pelletizing outlet, described lead skim pelletizing entrance is dried
It is connected with the outlet of described lead skim pelletizing；
Rotary hearth furnace, is followed successively by feed zone, low-temperature space, middle warm area, high-temperature region according to the raw material direction of motion in described rotary hearth furnace and goes out
Material area, described feed zone has lead skim pelletizing entrance is dried, and described low-temperature space has bismuth metal outlet, and described middle warm area has gold
Belong to zinc outlet, described high-temperature region has lead oxide outlet, described discharge zone has metallized pellet outlet, described lead skim ball is dried
Group entrance with described be dried lead skim pelletizing outlet be connected；
Bismuth oxide flue, described bismuth oxide flue is connected with the outlet of described bismuth metal；
Zinc oxide flue, described zinc oxide flue is connected with the outlet of described metallic zinc；
Lead oxide flue, described lead oxide flue is connected with the outlet of described lead oxide；
Molten point of stove, a described molten point stove has metallized pellet entrance, metallic iron outlet and melting slag outlet, described metallized pellet
Entrance is connected with the outlet of described metallized pellet.
2. it is reduced directly the processing system of lead skim according to claim 1 it is characterised in that further including:
First bagroom, described first bagroom is connected with described bismuth oxide flue, and is suitable to collect bismuth oxide；
Second bagroom, described second bagroom is connected with described zinc oxide flue, and is suitable to collect zinc oxide；
3rd bagroom, described 3rd bagroom is connected with described lead oxide flue, and is suitable to collect lead oxide.
3. it is reduced directly the processing system of lead skim according to claim 1 it is characterised in that a described molten point stove has further
Calcium oxide entrance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620830513.XU CN205907330U (en) | 2016-08-01 | 2016-08-01 | Direct reduction lead slag's processing system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620830513.XU CN205907330U (en) | 2016-08-01 | 2016-08-01 | Direct reduction lead slag's processing system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106148717A (en) * | 2016-08-01 | 2016-11-23 | 江苏省冶金设计院有限公司 | The processing method of direct-reduction lead skim and processing system |
| CN112522521A (en) * | 2020-11-20 | 2021-03-19 | 云南华鼎再生资源开发有限公司 | Method for treating lead slag by rotary hearth furnace |
-
2016
- 2016-08-01 CN CN201620830513.XU patent/CN205907330U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106148717A (en) * | 2016-08-01 | 2016-11-23 | 江苏省冶金设计院有限公司 | The processing method of direct-reduction lead skim and processing system |
| CN112522521A (en) * | 2020-11-20 | 2021-03-19 | 云南华鼎再生资源开发有限公司 | Method for treating lead slag by rotary hearth furnace |
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