CN108085511A - A kind of method that zinc kiln slag production metallized charge is carried using blast furnace dust - Google Patents
A kind of method that zinc kiln slag production metallized charge is carried using blast furnace dust Download PDFInfo
- Publication number
- CN108085511A CN108085511A CN201711218450.8A CN201711218450A CN108085511A CN 108085511 A CN108085511 A CN 108085511A CN 201711218450 A CN201711218450 A CN 201711218450A CN 108085511 A CN108085511 A CN 108085511A
- Authority
- CN
- China
- Prior art keywords
- kiln
- grade
- zinc
- blast furnace
- zinc oxide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B19/00—Obtaining zinc or zinc oxide
- C22B19/34—Obtaining zinc oxide
- C22B19/38—Obtaining zinc oxide in rotary furnaces
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention relates to it is a kind of using blast furnace dust carry zinc kiln slag production metallized charge method, the production technology used for：（1）Granularity is carried into zinc kiln slag with carbon residue by 100 for 1 10mm blast furnace dusts：It is added to after 25 30 ratio dispensings, mixing, wetting in Dr Kiln；（2）Mixed material reduction through 1,200 1250 DEG C of excess temperature, 60 90min of time in rotary kiln, and kiln slag can be made fully to be reduced in rotary kiln using the hydrocarbon joint reduction of high volatile beans and high-grade grain ore deposit and carbon cycle oxygenation direct reduction process is sprayed into rotary kiln in the granular material reduction middle and later periods.（3）Roasting material after cooling is divided into magnetic metallized product and not magnetic carbon residue after magnetic separator magnetic separation.Metallized product is utilized for blast furnace or converter, carbon residue can returning charge utilized as coal；（4）Enter the flue gas of kiln end discharge by can obtain high-quality zinc oxide when heat preservation settlement room, bag filter from rotary kiln.
Description
Technical field
The invention belongs to metallurgical and mineral engineering technology fields, and in particular to a kind of to propose zinc kiln slag life using blast furnace dust
The method for producing metallized charge.
Background technology
Blast furnace gas plaster is the fine grained stove dirt carried out in ironmaking processes by blast furnace gas, it is by blast furnace burden powder
It is one of iron and steel enterprise's primary solids emission with the microparticle composition generated in high-temperature region intense reaction.Blast furnace dust
The main component of mud is iron, and iron content is generally TFe30~65%, simultaneously containing harmful elements such as certain Zn, K, Na,
Middle blast furnace gas plaster containing ZnO high up to 7~10%.
At present, it is domestic that rotary hearth furnace process is used mostly to the disposal of blast furnace gas plaster.Turn bottom when blast furnace gas plaster uses
When stove is disposed, blast furnace dust carries out dispensing with high zinc material, and zinc oxide content in mixed material is made to reach more than 8% again
Pelletizing is carried out using pelletizing disk.For pellet after rotary hearth furnace enters the addition of kiln end, material its in moving process in rotary hearth furnace is warm
Degree gradually rises, and since carbon content is higher in blast furnace dust, ferriferous oxide is by blast furnace dust in blast furnace gas plaster
Carbon reduced.High-temperature material after roasting carries out water cooling after being discharged from rotary hearth furnace kiln discharge end, can obtain having certain metal
The kiln slag of rate.Since rotary hearth furnace takes into account oxidation zinc recovering function in process of production, exhaust gas temperature is generally 600-700
℃.For the high-temperature flue gas waste heat of recycling rotary hearth furnace discharge, high-temperature flue gas is entered in heat exchanger after rotary hearth furnace discharge, carried out
Reduce exhaust gas temperature while waste heat recovery, temperature is reduced to the collection that less than 200 DEG C of flue gas carries out zinc oxide again.This work
Skill there are the problem of be：It is that zinc oxide contains in 30-40%, kiln slag degree of metalization 30-40%, kiln slag to produce obtained zinc oxide grade
Measure 1-2%, the Iron grade of kiln slag is 45-48%, it is impossible to be directly added into sintering or blast furnace is utilized.
The content of the invention
The technical problems to be solved by the invention be in the prior art the shortcomings that and provide a kind of using blast furnace gas
The method that ash carries zinc kiln slag production metallized charge, the present invention, which makes full use of blast furnace dust to carry the iron in zinc kiln slag and zinc etc., to be had
Beneficial element, using the hydrocarbon joint reduction of rotary kiln and carbon cycle oxygenation restoring method, Iron grade reaches in the kiln slag that makes that treated
More than 54%, zinc oxide content reaches less than 0.4%, degree of metalization and reaches more than 90%, fully meets the needs of converter producing.
To be adopted the following technical scheme that the technical issues of solving the present invention：
A kind of method that zinc kiln slag production metallized charge is carried using blast furnace dust, is as follows：
（1）Granularity is carried into zinc kiln slag with the carbon residue of carbon content more than 80% by 100 for 1-10mm blast furnace dusts：25-30 mass ratioes
Dispensing is mixed to get mixture, and Dr Kiln is added to after mixture is soaked with the water of mixture quality 10-12%
It is interior to be dried through 200-400 DEG C of excess temperature, time 5-10min；
（2）Dried mixed material enters the reduction of high temperature reduction section in Dr Kiln, and the temperature of reduction is
1200-1250 DEG C, recovery time 60-90min start into rotary kiln when the recovery time is 50-70min in reduction process
Simultaneously spray into the high volatile beans of mixed raw material weight 10-15% and the high-grade bloodstone of mixed raw material weight 15-20% into
The hydrocarbon joint reduction of row and carbon cycle oxygenation reduction make mixed material fully be reduced in rotary kiln, until high temperature reduction knot
Beam；
（3）It is discharged into water and is cooled down from Dr Kiln kiln discharge end after mixed material high temperature reduction, be cooled to 100
Roasting material is taken out below DEG C from water；Material is roasted in magnetic separator after magnetic field intensity 1000-2000 Oe dry type magnetic separations,
Magnetic metallized product and not magnetic carbon residue are obtained, magnetic metallized product carries out profit for blast furnace or converter
With not magnetic carbon residue is utilized as coal；
（4）The high-temperature flue gas for entering the discharge of kiln end from Dr Kiln enters in heat preservation settlement room, with the drop of flue gas flow rate
Low, the large dust particle that oxide powder and zinc is adhered in flue gas settles aggregation under the effect of gravity, mineral grain is made to be deposited on heat preservation heavy
Room bottom is dropped, obtains the low-grade zinc oxide powder that zinc oxide grade is 10-15%；
（5）The 500-600 DEG C of high-temperature flue gas containing zinc oxide and a small amount of dirt come out from heat preservation settlement room is sent to U-shaped
In tubulose air/water cooler, under the indirect cooling effect of the multiple flow-disturbing and air and water of U-shaped coil pipe, solid particle in flue gas
Start to grow up by colliding and adsorbing, bond the large granular materials formed and be deposited on U-tube shape air water cooling under the effect of gravity but
Device bottom obtains the middle grade zinc oxide powder of zinc oxide grade 15-40%, in U-tube shape in U-tube shape air/water cooler front end
Air/water cooler rear end obtains the relatively high-grade oxide powder and zinc of zinc oxide grade 40-60%, is arranged from U-tube shape air/water cooler
The flue-gas temperature gone out is reduced to less than 250 DEG C；
（6）Low-temperature flue gas enters in bag filter the collection for carrying out zinc oxide, obtains the Gao Pin of zinc oxide grade more than 60%
Position oxide powder and zinc, high-grade oxide powder and zinc are utilized as production metallized charge.
Blast furnace gas plaster carries zinc kiln slag：Iron grade is 45-48%, SiO2Mass content 6-7%, ZnO mass content 1-3%,
K2O mass contents 0.6-0.8%, Na2O mass content 0.15-0.20%, C mass contents 2-3%.
The beans of high volatile：Fixed carbon mass content is 44-46%, ash content mass content is 7-9%, volatile matter quality contains
It measures as 47-49%, the beans granularity of high volatile is 5-20mm.
High-grade bloodstone：Grade is more than 45%, granularity 1-10mm.
In Dr Kiln kiln hood, the beans spray gun of high volatile and high-grade bloodstone spray gun, height volatilization are set
Property beans spray gun by the beans of high volatile blow to away from kiln hood outlet for Dr Kiln kiln length 1/4-1/5 locate, height
High-grade bloodstone is blown to the 1/4-1/5 away from kiln hood outlet for Dr Kiln kiln length by the bloodstone spray gun of grade
Place.
By step（4）In heat preservation settlement room in obtained low-grade zinc oxide powder and step（5）Middle U-tube shape air water cooling
But after the middle grade zinc oxide powder that device obtains all is mixed, the mixed material of zinc oxide grade 20-30%, mixture are obtained
Material again returns to raw material mixing system and carries out dispensing as the carbon residue of carbon content more than 80%.
This technique use zinc oxide circulation collection method, be applicable to the relatively low blast furnace gas plaster of zinc oxide content into
Row zinc oxide extracts.The present invention takes and is sprayed into rotary kiln to improve the degree of metalization of metallized product, reducing zinc oxide content
Enter the hydrocarbon joint reduction of beans and high-grade bloodstone of high volatile and carbon cycle oxygenation direct reduction process.When granular
Material reduces in rotary kiln when proceeding to the middle and later periods, and carbon content and ferriferous oxide oxygen content are reduced in granular material, also Primordial Qi
Body reduces with ferriferous oxide contact area, and material interior atmosphere concentration is relatively low, drops the reduction reaction speed of granular material
It is low.To improve the reducing atmosphere concentration of granular material reduction reaction middle and later periods, take from rotary kiln kiln discharge end and spray into 5-20mm high
Volatile beans, the H of the beans volatilization releasing of high volatile2It can be improved with the CO that CO and beans gasification reaction are released granular
Material reduction reaction middle and later periods reducing atmosphere concentration, so as to improve the reduction rate of granular material roasting middle and later periods.Using 1-
10mm high-grade bloodstone makees oxygenation agent, and after high-grade bloodstone is injected to from kiln discharge end in rotary kiln, reduction reaction is put
Go out substantial amounts of CO2Gas can accelerate gasification reaction speed in granular material, and gasification reaction is made to generate more CO, so as to add
The reduction reaction speed of fast granular material, and ferriferous oxide in granular material and zinc oxide is made sufficiently to be reduced.
The present invention is makes full use of blast furnace dust to carry the beneficial elements such as the iron in zinc kiln slag and zinc, for blast furnace dust
Zinc kiln slag is carried using the hydrocarbon joint reduction of rotary kiln and carbon cycle oxygenation restoring method, Iron grade reaches in the kiln slag that can make that treated
Reach less than 0.4%, degree of metalization to more than 54%, zinc oxide content and reach more than 90%, fully meet the needs of converter producing.
To improve the grade and the rate of recovery of oxide powder and zinc in the present invention, the method taken has：（1）To kiln slag roasting before with it is residual
Carbon carries out dispensing and mixes, humidifies, to reduce the dust emission during kiln slag roasts in rotary kiln, so as to reduce rotary kiln discharge
Flue gas in dust content；（2）Enter the method for kiln roasting using aqueous granular material, enter kiln end Dust Capacity reducing rotary kiln
Meanwhile the moisture discharged in aqueous granular material drying process can be made to enter in flue gas, the humidity of flue gas is added, so as to promote
The absorption between subparticle and agglomeration into flue gas；（3）In U-tube shape air/water cooler, using 10-12 group U-shapeds
Coil pipe to extend the flow distance of flue gas, enhances the disturbance during flow of flue gas, molecule in flue gas can be made to obtain fully
Collision and make its bond absorption and reunion grow up；（4）From U-tube shape air/water cooler flow out flue gas in Zinc oxide particles
It is fully grown up, flue gas can be such that oxide powder and zinc is sufficiently recycled when flowing through bag filter；（5）By improve into
Enter zinc oxide content in rotary kiln material, improve in rotary kiln discharge flue gas zinc oxide during zinc oxide content and flow of flue gas
Collision and reunion probability between particle can improve the grade of finished product zinc oxide.
For kiln slag used in the present invention under the high temperature of reduction furnace and reducing atmosphere, the zinc oxide in kiln slag is reduced into gold
Belong to zinc, since the fusing point of metallic zinc is 419.53 DEG C, boiling point is 907 DEG C, the metallic zinc of generation gasifies in kiln under high temperature,
And it is discharged in the form of zinc fume inside material.Zinc fume zinc under the oxidizing atmosphere of flue gas is again be oxidized, and is generated
Zinc oxide solia particle.Zinc oxide fine particles in flue gas are mutually collided and bonded between particle in flow process, can be made fine
Grain Zinc oxide particles are gradually grown up.Zinc oxide after particle growth can be used bag filter and be collected, and can obtain zinc oxide
The product of content 50-60%.
The present invention has following effect：
1st, while processing blast furnace dust carries zinc kiln slag, iron in kiln slag, carbon and zinc resource is effectively utilized, reduces metal
Change alkali metal content in furnace charge, improve the rate of recovery of zinc.2nd, blast furnace dust carries zinc kiln slag in rotary kiln reduction process, passes through
Using hydrocarbon joint reduction, carbon cycle oxygenation direct-reduction, rotary kiln Zinc form beneficiation technologies, the reduction of kiln slag is not only reduced
Temperature and shortening recovery time, and produce high-quality oxide powder and zinc and metallization material.3rd, in zinc oxide recovery process,
By extending the length of U-tube shape air/water cooler, the oxide powder and zinc of grade 50-60% can be produced.4th, oxygen produced by the invention
Change zinc powder product from the influence of fluctuations of kiln slag ZnO content, have the function of into kiln raw material ZnO self enrichments（Not with addition of the high zinc of outsourcing
Material）, kiln slag reduction after degree of metalization reach more than 80% and residual zinc rate be less than 0.4%.
Description of the drawings
Fig. 1 present invention carries the flow chart of zinc kiln slag production metallized charge using blast furnace dust.
Specific embodiment
Embodiment 1
A kind of method that zinc kiln slag production metallized charge is carried using blast furnace dust, it is characterised in that be as follows：
1st, the selection of material
Blast furnace gas plaster carries zinc kiln slag：Iron grade is 48%, SiO2Mass content 7%, ZnO mass contents 1%, K2O mass contents
0.8%、Na2O mass contents 0.15%, C content 3%.
High volatile beans：Fixed carbon mass content is 46%, ash content mass content is 7%, volatile matter mass content is
47%th, granularity 20mm.
High-grade bloodstone：Iron grade is 46%, granularity 1mm.
2nd, mix wetting
Granularity is carried into zinc kiln slag with carbon residue by 100 for 10mm blast furnace dusts：25 mass are than using mixture 10% after dispensing and mixing
The water of quality soaks mixture；
3rd, the rotary kiln reduction of mixed material and balling
Mixed material is added in from the kiln end that enters of rotary kiln, and material is dried in rotary kiln through 400 DEG C of excess temperature, time 5min
With 800 DEG C of temperature, time 15min preheating after, rotary kiln high temperature reduction section by control 1250 DEG C of mixed material reduction temperature,
Time 60min starts into rotary kiln in reduction process when the recovery time is 50min while sprays into mixed raw material weight 15%
High volatile beans and mixed raw material weight 20% high-grade bloodstone carry out it is hydrocarbon joint reduction and carbon cycle oxygenation reduction
Mixed material is made fully to be reduced in rotary kiln, until high temperature reduction terminates；Kiln slag is made to be obtained in rotary kiln fully also
Original, and the powder after dusting is made to be bonded to spherical material before kiln discharge.
The beans spray gun of high volatile is set in Dr Kiln kiln hood, by the beans that granularity is 20mm high volatiles
Be blown away from kiln hood outlet is at the 1/4 of rotary kiln length.Away from 1/4 that kiln hood outlet is rotary kiln length everywhere in high temperature in kiln
The posterior segment of reduction section, the carbon in gas ash is most of herein has consumed, and reducing atmosphere is weaker in the bed of material, is thrown into high volatile
After beans, the C and the CO of generation in the bed of material in C and carbon residue in height volatilization beans2Generation gasification reaction releases CO, enhances
Reducing atmosphere in the bed of material improves kinetics of reduction condition, improves reduction reaction speed.Meanwhile it is blown into kiln
High volatile beans release volatile matter under high temperature in kiln, the CH in volatile matter4, tar, benzene, the combustibles such as naphthalene are in rotary kiln
Interior burning, which is used as, heats fuel, the H in volatile matter2The ferriferous oxide that will be reduced when through the bed of material as reducing agent in the bed of material,
Granular material can be achieved when reduction temperature early period is less than 800 DEG C with H2Based on reduction, it is higher than 800 DEG C in reduction middle and later periods temperature
When reduced with CO based on.The high-grade grain ore deposit injection that granularity is 1mm is arrived and is back away from kiln hood outlet by the spray gun of high-grade bloodstone
At the 1/4 of rotary kiln kiln length.It is rotary kiln length 1/4 everywhere in the posterior segment of high temperature reduction section in kiln away from kiln hood outlet, herein
Carbon in gas ash has largely consumed, and reducing atmosphere is weaker in the bed of material.It is high in kiln under high temperature action after grain ore deposit sprays into
CO in ferriferous oxide and the bed of material in grade grain ore deposit occurs reduction reaction and releases CO2, CO2As " oxygenation agent " with spraying into kiln
High volatilization beans in C gasification reaction occur release CO, enhance the reducing atmosphere in the bed of material, improve reduction reaction power
Condition improves reduction reaction speed.
4th, material cooling is roasted
High-temperature roasting material after rotary kiln reduction enters water after being discharged from kiln discharge end and is cooled down, and roasting material is cooled to 100 DEG C
It is taken out below from water.
5th, material magnetic separation is roasted
Material is roasted after magnetic separator magnetic separation, is divided into magnetic metallized product and not magnetic carbon residue.Metallized product
Utilized for blast furnace or converter, carbon residue can returning charge the work of zinc kiln slag is carried as 10mm blast furnace dusts in raw material mixing system
Dispensing utilization is carried out for the carbon residue of carbon content more than 80%.
It is utilized.
6th, 500 DEG C of high-temperature flue gas for entering the discharge of kiln end from rotary kiln are entered in heat preservation settlement room, with flue gas flow rate
It reduces, the large dust particle that oxide powder and zinc is adhered in flue gas settles aggregation under the effect of gravity, and most of mineral grain can be made to sink
It accumulates in heat preservation settlement room bottom, obtains zinc oxide grade 15%, the low-grade zinc oxide powder of yield 6%.
7th, the 500-600 DEG C of high-temperature flue gas containing zinc oxide and a small amount of dirt come out from heat preservation settlement room is sent to
In U-tube shape air/water cooler, under the indirect cooling effect of the multiple flow-disturbing and air and water of U-shaped coil pipe, solid in flue gas
Particle starts to grow up under the flow-disturbing effect of flowing by colliding and adsorbing, and bonds the large granular materials formed under the effect of gravity
U-tube shape air/water cooler bottom is deposited on, zinc oxide grade 40%, yield are can obtain in U-tube shape air/water cooler front end
3% middle grade zinc oxide powder can obtain the high-grade zinc oxide of zinc oxide grade 60% in U-tube shape air/water cooler rear end
Powder, while the flue-gas temperature discharged from U-tube shape air/water cooler is reduced to less than 250 DEG C.
8th, the low-temperature flue gas after cooling down enters in bag filter the collection for carrying out zinc oxide, can obtain zinc oxide grade
60%th, the high-grade oxide powder and zinc of yield 8%, high-grade oxide powder and zinc can be utilized as final products.
9th, flue gas can be discharged after bag filter dedusting and smoke extractor pressurization by chimney.
10th, the middle grade oxygen for obtaining the low-grade zinc oxide obtained in heat preservation settlement room and U-tube shape air/water cooler
After changing zinc mixing, zinc oxide grade 30%, the mixed material of inventory 9% are obtained, mixed material again returns to raw material mixing system
Dispensing is carried out, zinc oxide content is increased to 11% in can making into the material of rotary kiln.
11st, rotary kiln generates during normal production by the carbon in blast furnace dust and rotary kiln end beans spray gun injection beans
Gas fuel burning provide heat.
Embodiment 2
A kind of method that zinc kiln slag production metallized charge is carried using blast furnace dust, it is characterised in that be as follows：
1st, the selection of material
Blast furnace gas plaster carries zinc kiln slag：Iron grade is 45%, SiO2Mass content 6%, ZnO mass contents 3%, K2O mass contents
0.6%、Na2O mass contents 0.20%, C mass contents 2%.
High volatile beans：Fixed carbon mass content is 46%, ash content mass content is 7%, volatile matter mass content is
47%th, granularity 20mm.
High-grade bloodstone：Iron grade is 46%, granularity 1mm.
2nd, mix wetting
Granularity is carried into zinc kiln slag with carbon residue by 100 for 10mm blast furnace dusts：25 mass are than using mixture 10% after dispensing and mixing
The water of quality soaks mixture；
3rd, the rotary kiln reduction of mixed material and balling
Mixed material is added in from the kiln end that enters of rotary kiln, and material is done in rotary kiln through 200 DEG C of excess temperature, time 10min
After dry and 400 DEG C of temperature, time 20min preheatings, in rotary kiln high temperature reduction section by controlling mixed material reduction temperature 1200
DEG C, time 90min, start when the recovery time is 70min into rotary kiln in reduction process while spray into mixed raw material weight
10% high volatile beans and the high-grade bloodstone of mixed raw material weight 15% carry out hydrocarbon joint reduction and carbon cycle oxygenation
Reduction makes mixed material fully be reduced in rotary kiln, until high temperature reduction terminates；Kiln slag is made to be filled in rotary kiln
Divide reduction, and the powder after dusting is made to be bonded to spherical material before kiln discharge.
The beans spray gun of high volatile is set in Dr Kiln kiln hood, by the beans that granularity is 20mm high volatiles
Be blown away from kiln hood outlet is at the 1/5 of rotary kiln length.Away from 1/5 that kiln hood outlet is rotary kiln length everywhere in high temperature in kiln
The posterior segment of reduction section, the carbon in gas ash is most of herein has consumed, and reducing atmosphere is weaker in the bed of material, is thrown into high volatile
After beans, the C and the CO of generation in the bed of material in C and carbon residue in height volatilization beans2Generation gasification reaction releases CO, enhances
Reducing atmosphere in the bed of material improves kinetics of reduction condition, improves reduction reaction speed.Meanwhile it is blown into kiln
High volatile beans release volatile matter under high temperature in kiln, the CH in volatile matter4, tar, benzene, the combustibles such as naphthalene are in rotary kiln
Interior burning, which is used as, heats fuel, the H in volatile matter2The ferriferous oxide that will be reduced when through the bed of material as reducing agent in the bed of material,
Granular material can be achieved when reduction temperature early period is less than 800 DEG C with H2Based on reduction, it is higher than 800 DEG C in reduction middle and later periods temperature
When reduced with CO based on.The high-grade grain ore deposit injection that granularity is 1mm is arrived and is back away from kiln hood outlet by the spray gun of high-grade bloodstone
At the 1/5 of rotary kiln kiln length.It is rotary kiln length 1/5 everywhere in the posterior segment of high temperature reduction section in kiln away from kiln hood outlet, herein
Carbon in gas ash has largely consumed, and reducing atmosphere is weaker in the bed of material.It is high in kiln under high temperature action after grain ore deposit sprays into
CO in ferriferous oxide and the bed of material in grade grain ore deposit occurs reduction reaction and releases CO2, CO2As " oxygenation agent " with spraying into kiln
High volatilization beans in C gasification reaction occur release CO, enhance the reducing atmosphere in the bed of material, improve reduction reaction power
Condition improves reduction reaction speed.
4th, material cooling is roasted
High-temperature roasting material after rotary kiln reduction enters water after being discharged from kiln discharge end and is cooled down, and roasting material is cooled to 100 DEG C
It is taken out below from water.
5th, material magnetic separation is roasted
Material is roasted after magnetic separator magnetic separation, is divided into magnetic metallized product and not magnetic carbon residue.Metallized product
Utilized for blast furnace or converter, carbon residue can returning charge the work of zinc kiln slag is carried as 1mm blast furnace dusts in raw material mixing system
Dispensing utilization is carried out for the carbon residue of carbon content more than 80%.
6th, 600 DEG C of high-temperature flue gas for entering the discharge of kiln end from rotary kiln are entered in heat preservation settlement room, with flue gas flow rate
It reduces, the large dust particle that oxide powder and zinc is adhered in flue gas settles aggregation under the effect of gravity, and most of mineral grain can be made to sink
It accumulates in heat preservation settlement room bottom, obtains zinc oxide grade 10%, the low-grade zinc oxide powder of yield 6%.
7th, the 500-600 DEG C of high-temperature flue gas containing zinc oxide and a small amount of dirt come out from heat preservation settlement room is sent to
In U-tube shape air/water cooler, under the indirect cooling effect of the multiple flow-disturbing and air and water of U-shaped coil pipe, solid in flue gas
Particle starts to grow up under the flow-disturbing effect of flowing by colliding and adsorbing, and bonds the large granular materials formed under the effect of gravity
U-tube shape air/water cooler bottom is deposited on, zinc oxide grade 15%, yield are can obtain in U-tube shape air/water cooler front end
3% middle grade zinc oxide powder can obtain the high-grade zinc oxide of zinc oxide grade 40% in U-tube shape air/water cooler rear end
Powder, while the flue-gas temperature discharged from U-tube shape air/water cooler is reduced to less than 250 DEG C.
8th, the low-temperature flue gas after cooling down enters in bag filter the collection for carrying out zinc oxide, can obtain zinc oxide grade
60%th, the high-grade oxide powder and zinc of yield 8%, high-grade oxide powder and zinc can be utilized as final products.
9th, flue gas can be discharged after bag filter dedusting and smoke extractor pressurization by chimney.
10th, the middle grade oxygen for obtaining the low-grade zinc oxide obtained in heat preservation settlement room and U-tube shape air/water cooler
After changing zinc mixing, zinc oxide grade 20%, the mixed material of inventory 9% are obtained, mixed material again returns to raw material mixing system
Dispensing is carried out, zinc oxide content is increased to 11% in can making into the material of rotary kiln.
11st, rotary kiln generates during normal production by the carbon in blast furnace dust and rotary kiln end beans spray gun injection beans
Gas fuel burning provide heat.
Claims (6)
- A kind of 1. method that zinc kiln slag production metallized charge is carried using blast furnace dust, it is characterised in that be as follows：（1）Granularity is carried into zinc kiln slag with the carbon residue of carbon content more than 80% by 100 for 1-10mm blast furnace dusts：25-30 mass ratioes Dispensing is mixed to get mixture, and Dr Kiln is added to after mixture is soaked with the water of mixture quality 10-12% It is interior to be dried through 200-400 DEG C of excess temperature, time 5-10min；（2）Dried mixed material enters the reduction of high temperature reduction section in Dr Kiln, and the temperature of reduction is 1200-1250 DEG C, recovery time 60-90min start into rotary kiln when the recovery time is 50-70min in reduction process Simultaneously spray into the high volatile beans of mixed raw material weight 10-15% and the high-grade bloodstone of mixed raw material weight 15-20% into The hydrocarbon joint reduction of row and carbon cycle oxygenation reduction make mixed material fully be reduced in rotary kiln, until high temperature reduction knot Beam；（3）It is discharged into water and is cooled down from Dr Kiln kiln discharge end after mixed material high temperature reduction, be cooled to 100 Roasting material is taken out below DEG C from water；Material is roasted in magnetic separator after magnetic field intensity 1000-2000 Oe dry type magnetic separations, Magnetic metallized product and not magnetic carbon residue are obtained, magnetic metallized product carries out profit for blast furnace or converter With not magnetic carbon residue is utilized as coal；（4）The high-temperature flue gas for entering the discharge of kiln end from Dr Kiln enters in heat preservation settlement room, with the drop of flue gas flow rate Low, the large dust particle that oxide powder and zinc is adhered in flue gas settles aggregation under the effect of gravity, mineral grain is made to be deposited on heat preservation heavy Room bottom is dropped, obtains the low-grade zinc oxide powder that zinc oxide grade is 10-15%；（5）The 500-600 DEG C of high-temperature flue gas containing zinc oxide and a small amount of dirt come out from heat preservation settlement room is sent to U-shaped In tubulose air/water cooler, under the indirect cooling effect of the multiple flow-disturbing and air and water of U-shaped coil pipe, solid particle in flue gas Start to grow up by colliding and adsorbing, bond the large granular materials formed and be deposited on U-tube shape air water cooling under the effect of gravity but Device bottom obtains the middle grade zinc oxide powder of zinc oxide grade 15-40%, in U-tube shape in U-tube shape air/water cooler front end Air/water cooler rear end obtains the relatively high-grade oxide powder and zinc of zinc oxide grade 40-60%, is arranged from U-tube shape air/water cooler The flue-gas temperature gone out is reduced to less than 250 DEG C；（6）Low-temperature flue gas enters in bag filter the collection for carrying out zinc oxide, obtains the Gao Pin of zinc oxide grade more than 60% Position oxide powder and zinc, high-grade oxide powder and zinc are utilized as production metallized charge.
- 2. a kind of utilization blast furnace dust according to claim 1 puies forward zinc kiln slag production metallized charge method, feature It is that blast furnace gas plaster carries zinc kiln slag：Iron grade is 45-48%, SiO2Mass content 6-7%, ZnO mass content 1-3%, K2O matter Measure content 0.6-0.8%, Na2O mass content 0.15-0.20%, C mass contents 2-3%.
- 3. a kind of utilization blast furnace dust according to claim 1 or 2 puies forward zinc kiln slag production metallized charge method, special Sign is the beans of high volatile：Fixed carbon mass content is 44-46%, ash content mass content is 7-9%, volatile matter mass content For 47-49%, the beans granularity of high volatile is 5-20mm.
- 4. a kind of utilization blast furnace dust according to claim 1 or 2 puies forward zinc kiln slag production metallized charge method, special Sign is high-grade bloodstone：Grade is more than 45%, granularity 1-10mm.
- 5. a kind of utilization blast furnace dust according to claim 1 or 4 puies forward zinc kiln slag production metallized charge method, special Sign is：In Dr Kiln kiln hood, the beans spray gun of high volatile and high-grade bloodstone spray gun, height volatilization are set Property beans spray gun by the beans of high volatile blow to away from kiln hood outlet for Dr Kiln kiln length 1/4-1/5 locate, height High-grade bloodstone is blown to the 1/4-1/5 away from kiln hood outlet for Dr Kiln kiln length by the bloodstone spray gun of grade Place.
- 6. a kind of utilization blast furnace dust according to claim 5 puies forward zinc kiln slag production metallized charge method, feature It is：By step（4）In heat preservation settlement room in obtained low-grade zinc oxide powder and step（5）Middle U-tube shape air water cooling is but After the middle grade zinc oxide powder that device obtains all is mixed, the mixed material of zinc oxide grade 20-30%, mixed material are obtained The carbon residue that raw material mixing system is again returned to as carbon content more than 80% carries out dispensing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711218450.8A CN108085511A (en) | 2017-11-28 | 2017-11-28 | A kind of method that zinc kiln slag production metallized charge is carried using blast furnace dust |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711218450.8A CN108085511A (en) | 2017-11-28 | 2017-11-28 | A kind of method that zinc kiln slag production metallized charge is carried using blast furnace dust |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108085511A true CN108085511A (en) | 2018-05-29 |
Family
ID=62173222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711218450.8A Pending CN108085511A (en) | 2017-11-28 | 2017-11-28 | A kind of method that zinc kiln slag production metallized charge is carried using blast furnace dust |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108085511A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111118238A (en) * | 2020-01-15 | 2020-05-08 | 邯郸钢铁集团有限责任公司 | Method for preparing steelmaking furnace burden by using blast furnace gas ash zinc extraction kiln slag |
| CN113122727A (en) * | 2021-04-22 | 2021-07-16 | 鑫联环保科技股份有限公司 | Method for treating iron and steel smoke dust |
| CN113699297A (en) * | 2021-07-21 | 2021-11-26 | 酒泉钢铁(集团)有限责任公司 | Blast furnace gas ash coal-based hydrogen metallurgy process |
| CN114395697A (en) * | 2022-01-04 | 2022-04-26 | 中冶南方工程技术有限公司 | Method for reducing carbon emission in reduction dezincification process |
| CN114836633A (en) * | 2022-04-14 | 2022-08-02 | 山东祥桓环境科技有限公司 | Coagulation tower, system and process for recovering zinc-containing dust and purifying zinc |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006241574A (en) * | 2005-03-07 | 2006-09-14 | Nippon Steel Corp | Method for recovering zinc from zinc-containing dust |
| CN101191159A (en) * | 2007-11-27 | 2008-06-04 | 攀钢集团钢城企业总公司 | Technique for extracting zinc from blast furnace gas mud by using rotary kiln |
| CN101705325A (en) * | 2009-12-10 | 2010-05-12 | 重庆瑞源环境工程有限公司 | Method for producing sponge iron and recycling nonferrous metals simultaneously by utilizing metallurgy waste materials |
| CN102127645A (en) * | 2011-02-18 | 2011-07-20 | 攀枝花钢城集团有限公司 | Technological method for extracting zinc by roasting blast furnace gas mud by virtue of rotary kiln |
| CN103555966A (en) * | 2013-10-18 | 2014-02-05 | 昆明华吉鑫金属粉料有限公司 | Method for producing zinc hypoxide powder in rotary kiln by taking blast furnace smoke as raw material |
| CN106367600A (en) * | 2016-08-29 | 2017-02-01 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Method for treating high-zinc iron-containing slime through utilizing rotary kiln |
| CN106636658A (en) * | 2016-12-27 | 2017-05-10 | 武汉钢铁股份有限公司 | Heat utilization device in dezincification process of gas ashes and method of heat utilization device |
| CN106756060A (en) * | 2017-03-24 | 2017-05-31 | 河北长力金属制品有限公司 | A kind of recovery method of indium metal |
-
2017
- 2017-11-28 CN CN201711218450.8A patent/CN108085511A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006241574A (en) * | 2005-03-07 | 2006-09-14 | Nippon Steel Corp | Method for recovering zinc from zinc-containing dust |
| CN101191159A (en) * | 2007-11-27 | 2008-06-04 | 攀钢集团钢城企业总公司 | Technique for extracting zinc from blast furnace gas mud by using rotary kiln |
| CN101705325A (en) * | 2009-12-10 | 2010-05-12 | 重庆瑞源环境工程有限公司 | Method for producing sponge iron and recycling nonferrous metals simultaneously by utilizing metallurgy waste materials |
| CN102127645A (en) * | 2011-02-18 | 2011-07-20 | 攀枝花钢城集团有限公司 | Technological method for extracting zinc by roasting blast furnace gas mud by virtue of rotary kiln |
| CN103555966A (en) * | 2013-10-18 | 2014-02-05 | 昆明华吉鑫金属粉料有限公司 | Method for producing zinc hypoxide powder in rotary kiln by taking blast furnace smoke as raw material |
| CN106367600A (en) * | 2016-08-29 | 2017-02-01 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Method for treating high-zinc iron-containing slime through utilizing rotary kiln |
| CN106636658A (en) * | 2016-12-27 | 2017-05-10 | 武汉钢铁股份有限公司 | Heat utilization device in dezincification process of gas ashes and method of heat utilization device |
| CN106756060A (en) * | 2017-03-24 | 2017-05-31 | 河北长力金属制品有限公司 | A kind of recovery method of indium metal |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111118238A (en) * | 2020-01-15 | 2020-05-08 | 邯郸钢铁集团有限责任公司 | Method for preparing steelmaking furnace burden by using blast furnace gas ash zinc extraction kiln slag |
| CN111118238B (en) * | 2020-01-15 | 2021-12-07 | 邯郸钢铁集团有限责任公司 | Method for preparing steelmaking furnace burden by using blast furnace gas ash zinc extraction kiln slag |
| CN113122727A (en) * | 2021-04-22 | 2021-07-16 | 鑫联环保科技股份有限公司 | Method for treating iron and steel smoke dust |
| CN113699297A (en) * | 2021-07-21 | 2021-11-26 | 酒泉钢铁(集团)有限责任公司 | Blast furnace gas ash coal-based hydrogen metallurgy process |
| CN114395697A (en) * | 2022-01-04 | 2022-04-26 | 中冶南方工程技术有限公司 | Method for reducing carbon emission in reduction dezincification process |
| CN114836633A (en) * | 2022-04-14 | 2022-08-02 | 山东祥桓环境科技有限公司 | Coagulation tower, system and process for recovering zinc-containing dust and purifying zinc |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108085511A (en) | A kind of method that zinc kiln slag production metallized charge is carried using blast furnace dust | |
| CN107760875B (en) | A kind of production line and technique of blast furnace dust production metallized charge | |
| CN107937711A (en) | A kind of dedusting ash of stainless steel treatment process | |
| CN106367600B (en) | A kind of method that high-Zinc and Ferric dust is handled using rotary kiln | |
| CN108048648B (en) | A kind of acid-washing stainless steel sludge treatment technique | |
| CN110923387B (en) | Iron-containing metallurgical slag particle step waste heat recovery and direct reduction system and method | |
| CN104846209B (en) | A kind of system and method for step-by-step reduction recovery ferrum and coal gasification recovery waste heat from molten copper slag | |
| CN101624638B (en) | Gas-burning reducing iron-fining furnace and one-step reducing iron-fining method thereof | |
| CN101070558A (en) | Baking-melting reduction iron smelting method, apparatus and raw amterial | |
| CN102399922B (en) | Blast furnace iron making method | |
| CN103836948B (en) | A kind of fluidizing reactor of high-carbon molybdenum-nickel ore and system | |
| CN101724721A (en) | Process for producing molten hot molten iron | |
| CN102851416A (en) | Heat recovery method for blast furnace slag | |
| CN108796217A (en) | A kind of device and method that zinc-iron-containing dust mud resource utilizes | |
| CN103952540B (en) | Ion dust mud contaning and high silicon iron concentrate is utilized to produce the technique of prereduced burden | |
| CN110093499A (en) | A kind of method of oxygen-rich treated blast furnace dust production secondary zinc oxide | |
| CN102978385B (en) | Carbon-containing pellet for blast furnace | |
| CN104630454A (en) | Ground phosphorite sintering technique | |
| WO2021227210A1 (en) | Apparatus capable of reducing metal, and reduction process | |
| CN110184405A (en) | A kind of method and device thereof using acid carbonaceous metallized pellet production molten iron | |
| CN110205431A (en) | Rotary kiln coal-based direct reduction oxygenation is molten to divide furnace short route molten iron making processes | |
| CN101736103B (en) | Iron manufacture technology | |
| CN210367760U (en) | Device for producing molten iron by adopting acidic carbon-containing metallized pellets | |
| CN208733192U (en) | A kind of device that zinc-iron-containing dust mud resource utilizes | |
| CN109371235B (en) | Based on NH3Desulfurization method for iron ore shaft furnace pelletizing process by slow release of binder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180529 |