CN109913654A - A kind of processing method of metallurgical solid waste - Google Patents
A kind of processing method of metallurgical solid waste Download PDFInfo
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- CN109913654A CN109913654A CN201910261954.0A CN201910261954A CN109913654A CN 109913654 A CN109913654 A CN 109913654A CN 201910261954 A CN201910261954 A CN 201910261954A CN 109913654 A CN109913654 A CN 109913654A
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Abstract
The invention discloses a kind of processing methods of metallurgical solid waste, for this process with metallurgical solid waste (metallurgical production environmental dust removal ash, sintering dust, pelletizing dust, blast furnace dust, bof sludge, electric furnace dust mud, steel slag and steel rolling dirt mud solid waste etc.) for primary raw material, adapted takes the products such as Fe, K, Na, Zn, Ti, V of spray regime iron bath type smelting reduction Extraction metallurgy solid waste containing calcium oxide, magnesium-containing oxide and mill coal.The present invention realizes metallurgical one step of solid waste processing, gradually separates, full element extraction, eat dry squeeze only from pyrogenic attack metallurgy solid waste STRENGTH ON COKE, sintering, the dependence of pelletizing and agglomeration is truly got rid of.Holistic approach is simple, efficient, is easy to carry out industrialized production.
Description
Technical field
The present invention relates to technical field of ferrous metallurgy, relate generally to a kind of processing method of metallurgical solid waste.
Background technique
Traditional iron and steel enterprise can all generate a large amount of metallurgical solid waste in processes such as sintering, pelletizing, ironmaking, steel-making and steel rolling
Dust, iron scale and slag account for 10% or more of total output of steel, wherein containing a large amount of iron and zinc, potassium, titanium, vanadium, lead,
The rare precious metals such as silver, indium have very high recovery value.The most important way of recycling of metallurgical solid waste is as matching at present
Material returns to sintering, but there are obvious shortcomings for such method, due to the physical parameter and miberal powder materials variance of metallurgical solid waste
It is larger, it is affected to agglomerates of sintered pellets production and technical indication and product quality；Simultaneously metallurgical solid waste contain more potassium,
The harmful elements such as sodium, zinc (Zn), directly returning to raw material will lead to harmful element in a large amount of circulation collections of blast furnace, and it is steady to influence blast furnace
Qualitative and safety causes the waste of the resources such as alkali metal (K, Na), zinc (Zn).
Currently, some dezincification processing techniques for iron and steel enterprise's metallurgy solid waste dust are derived in order to solve the above problem,
Such as " method of CN101386913 recovering zinc oxide in Zn-containing dust treatment by rotary hearth furnace ", " CN104073649A iron content zinc powder dirt time
Receive utilize technique ", " processing method of CN101092664 dust with zinc of electric furnace ".But current production technology is only by smelting
Zinc in golden solid waste dust is removed in flue gas, there is no removing and collection processing is carried out to elements such as potassium, sodium, leads to potassium, sodium
Equal alkali metal elements are still present in metallurgical solid waste dust, and treatment effect is undesirable, and resource utilization is low.
Therefore it provides a kind of processing method of metallurgical solid waste, to solve metallurgical solid waste dust poor processing effect, money
The problem of low phenomenon of source utilization rate is those skilled in the art's urgent need to resolve.
Summary of the invention
In view of this, being restored the present invention provides a kind of processing method of metallurgical solid waste using iron bath type smelting
The products such as iron, potassium, sodium, zinc, titanium, vanadium, indium, the silver of method Extraction metallurgy solid waste.
To achieve the goals above, the present invention adopts the following technical scheme:
A kind of processing method of metallurgical solid waste, which is characterized in that specifically comprise the following steps:
(1) to bulk metallurgical solid waste by crushing grinding ,≤the particle powder of 6mm is made；
(2) by broken metallurgical solid waste cooperation metallurgical production environmental dust removal ash, sintering dust, pelletizing dust,
The solid waste such as blast furnace dust, bof sludge, electric furnace dust mud, steel slag and steel rolling dirt mud solid waste, containing calcium oxide, contain
Magnesium oxide mixes in proportion, stirs evenly, and mixture is made；
(3) by mixture drying and dehydrating, and prereduction is carried out, obtains smelting furnace mixture；
(4) nitrogen buffer gas, smelting furnace mixture, by solid waste raw material blowing rifle, deep spirt smelting furnace melts at a relatively high speed
Chi Zhong；
(5) coal dust is made through broken, grinding, drying in mill coal, deep spirt is molten at a relatively high speed by fuel injection rifle
Furnace；
(6) smelting furnace is equipped with oxygen-enriched hot air furnace, and oxygen-enriched hot air is blown into furnace by furnace roof heat gun, and mill coal is rapid at high temperature
Volatilization forms C particle and the reaction of smelting furnace mixture, restores metal oxide；Another part and mixed powder are involved in clinker jointly,
Reduction reaction is completed in slag；
(7) Fe, the Pb restored sinks to cupola well, and gravity is automatically separated to obtain metallic iron and lead, and Ti, V enter clinker, leads to
Cross physical method isolated metal Ti, V.
(8) flue gas after reacting is discharged out of the furnace by furnace top flue, is divided the elements such as carbon by gravity cyclone dust removal
It separates out and, carbonaceous dust can recycle again, and remaining flue gas separates and collects to obtain containing zinc, potassium, sodium by electrostatic fabric filter
Combination ash.
Preferably, step (1) the bulk metallurgical solid waste include converter slag, iron scale, slag iron single
Or a variety of mixtures.
Preferably, grade control≤6mm of step (1) the bulk metallurgical solid waste crushing grinding.It is above-mentioned preferred
The beneficial effect of technical solution is: metallurgical solid waste progress pulverization process is conducive to it and is come into full contact with solid fuel,
Reduction reaction is promoted to reduce fuel consumption.
It preferably, include quick lime, lime stone, the single of dolomite or a variety of mixed containing calcium oxide in the step (2)
Close object.
Preferably, in the step (2) magnesium-containing oxide include magnesite, light dolomite, serpentine, dolomite list
Kind or a variety of mixtures.
Preferably, metallurgical solid waste, the mass percent containing calcium oxide, magnesium-containing oxide in the step (2)
For 80~95:1~10:4~10.
The beneficial effect of above-mentioned optimal technical scheme is: adjusting furnace crucible clinker and molten iron using calcium oxide and magnesia
Viscosity and mobility reduce fuel consumption to be conducive to slag iron separation.
Preferably, mixture moisture content≤2wt% in the step (3) after drying.
Preferably, pre-reduction temperature is controlled at 750 DEG C ± 50 DEG C in the step (3).
The beneficial effect of above-mentioned optimal technical scheme is: mixture moisture content≤2wt% after dry is conducive to mixture
Rifle is blown by spray solid waste raw material to be blown to smelting furnace, prevents mixture from bonding in pipeline, meanwhile, moisture reduces and to mixture
It carries out prereduction and advantageously reduces fuel consumption.
Preferably, mill coal includes the single such as bituminous coal, anthracite, semi-coke powder or a variety of mixtures in the step (5).
Preferably, mill coal is crushed, is ground in the step (5), coal dust is made in drying, the control of 200 mesh grade of coal dust
>=90%.
Preferably, 900 DEG C -1200 DEG C of hot blast temperature of the step (10), hot wind oxygen content 25%-40%.
The beneficial effect of above-mentioned optimal technical scheme is: by solid fuel grade, can make coal dust conflagration, generate heat
Amount promotes carbon monoxide to generate, and facilitates the reduction of material each component, fusing, separation, promotes the Reduced separating of iron, potassium chloride, chlorine
Change sodium, zinc oxide separation is discharged with flue gas.
It can be seen via above technical scheme that compared with prior art, it is useless that the present disclosure provides a kind of metallurgical solids
The processing method of gurry, with metallurgical solid waste (metallurgical production environmental dust removal ash, sintering dust, pelletizing dust, blast furnace powder
Dirt, bof sludge, electric furnace dust mud, steel slag and steel rolling dirt mud solid waste etc.) it is primary raw material, adapted contains calcium oxide, contains
Magnesium oxide and mill coal take Fe, K, Na, Zn, Ti, V of spray regime iron bath type smelting reduction Extraction metallurgy solid waste
Equal products.The present invention from truly getting rid of pyrogenic attack metallurgy solid waste STRENGTH ON COKE, sintering, the dependence of pelletizing and agglomeration,
Metallurgical one step of solid waste processing is realized, is gradually separated, full element extraction, dry squeeze only is eaten.Holistic approach is simple, efficiently, be easy into
Row industrialized production.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other drawings based on these drawings.
Fig. 1 is process flow chart of the invention.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
The embodiment of the invention discloses a kind of processing methods of metallurgical solid waste, specifically comprise the following steps:
(1) first metallurgical solid waste is smashed and ground, crosses 6mm sieve screening；
(2) according to mass ratio be 80~95:1~10:4~10 weigh metallurgical solid waste respectively, containing calcium oxide and
Magnesium-containing oxide；Wherein, metallurgical solid waste includes environmental dust removal ash, sintering dust, pelletizing dust, blast furnace dust, converter
One of solid waste such as dirt mud, electric furnace dust mud, steel slag, steel rolling dirt mud, iron scale, iron oxide red, coking, dust removing ash are more
Kind mixture, includes that quick lime, lime stone, the single of dolomite or a variety of mixtures, magnesium-containing oxide include containing calcium oxide
Magnesite, light dolomite, serpentine, the single of dolomite or a variety of mixtures.
(3) mixture moisture content≤2wt% by mixture drying and dehydrating, after drying.
(4) mixture is subjected to prereduction, pre-reduction temperature is controlled at 750 DEG C ± 50 DEG C, obtains smelting furnace mixture；
(5) nitrogen buffer gas, smelting furnace mixture, by solid waste raw material blowing rifle, deep spirt smelting furnace melts at a relatively high speed
Chi Zhong；
(6) by mill coal (including the single such as bituminous coal, anthracite, semi-coke powder or a variety of mixtures) through broken, grinding, drying
It is made coal dust, 200 mesh grade of coal dust control >=90% passes through fuel injection rifle deep spirt smelting furnace at a relatively high speed；
(7) smelting furnace outfit oxygen-enriched hot air furnace, 900 DEG C -1200 DEG C of hot blast temperature, hot wind oxygen content 25%-40%.It is oxygen-enriched
Hot wind is blown into furnace by furnace roof heat gun, and volatilization forms C particle and the reaction of smelting furnace mixture to mill coal rapidly at high temperature, also
Original goes out metal oxide；Another part and mixed powder are involved in clinker jointly, and reduction reaction is completed in slag；
(8) Fe, the Pb restored sinks to cupola well, and gravity is automatically separated to obtain metallic iron and lead, and Ti, V enter clinker, leads to
Cross physical method isolated metal Ti, V.
(9) flue gas after reacting is discharged out of the furnace by furnace top flue, is divided the elements such as carbon by gravity cyclone dust removal
It separates out and, carbonaceous dust can recycle again, and remaining flue gas separates and collects to obtain containing zinc, potassium, sodium by electrostatic fabric filter
Combination ash.
Embodiment 1
The embodiment of the present invention 1 discloses a kind of processing method of metallurgical solid waste, specifically comprises the following steps:
(1) first metallurgical solid waste is smashed and ground, crosses 6mm sieve screening；
It (2) is that 80:10:10 weighs metallurgical solid waste, containing calcium oxide and magnesium-containing oxide respectively according to mass ratio；
Wherein, metallurgical solid waste includes environmental dust removal ash, sintering dust, pelletizing dust, blast furnace dust, bof sludge, electric furnace dirt
One of solid waste such as mud, steel slag, steel rolling dirt mud, iron scale, iron oxide red, coking, dust removing ash or a variety of mixtures, contain
Calcium oxide includes quick lime, lime stone, the single of dolomite or a variety of mixtures, and magnesium-containing oxide includes magnesite, light-burned
Dolomite, serpentine, the single of dolomite or a variety of mixtures.
(3) the mixture moisture content 2wt% by mixture drying and dehydrating, after drying.
(4) mixture is subjected to prereduction, pre-reduction temperature is controlled at 700 DEG C, obtains smelting furnace mixture；
(5) nitrogen buffer gas, smelting furnace mixture, by solid waste raw material blowing rifle, deep spirt smelting furnace melts at a relatively high speed
Chi Zhong
(6) by mill coal (including the single such as bituminous coal, anthracite, semi-coke powder or a variety of mixtures) through broken, grinding, drying
It is made coal dust, 200 mesh grade of coal dust control 90% passes through fuel injection rifle deep spirt smelting furnace at a relatively high speed；
(7) smelting furnace outfit oxygen-enriched hot air furnace, 900 DEG C of hot blast temperature, hot wind oxygen content 25%.Oxygen-enriched hot air is by furnace roof hot wind
Rifle is blown into furnace, and volatilization forms C particle and the reaction of smelting furnace mixture to mill coal rapidly at high temperature, restores metal oxide；
Another part and mixed powder are involved in clinker jointly, and reduction reaction is completed in slag；
(8) Fe, the Pb restored sinks to cupola well, and gravity is automatically separated to obtain metallic iron and lead, and Ti, V enter clinker, leads to
Cross physical method isolated metal Ti, V.
(9) flue gas after reacting is discharged out of the furnace by furnace top flue, is divided the elements such as carbon by gravity cyclone dust removal
It separates out and, carbonaceous dust can recycle again, and remaining flue gas separates and collects to obtain containing zinc, potassium, sodium by electrostatic fabric filter
Combination ash.
Embodiment 2
The embodiment of the present invention 2 discloses a kind of processing method of metallurgical solid waste, specifically comprises the following steps:
(1) first metallurgical solid waste is smashed and ground, crosses 6mm sieve screening；
It (2) is that 85:7:8 weighs metallurgical solid waste, containing calcium oxide and magnesium-containing oxide respectively according to mass ratio；Its
In, metallurgical solid waste include environmental dust removal ash, sintering dust, pelletizing dust, blast furnace dust, bof sludge, electric furnace dust mud,
One of solid waste such as steel slag, steel rolling dirt mud, iron scale, iron oxide red, coking, dust removing ash or a variety of mixtures, calcic oxygen
Compound includes quick lime, lime stone, the single of dolomite or a variety of mixtures, and magnesium-containing oxide includes magnesite, light-burned white clouds
Stone, serpentine, the single of dolomite or a variety of mixtures.
(3) the mixture moisture content 2wt% by mixture drying and dehydrating, after drying.
(4) mixture is subjected to prereduction, pre-reduction temperature is controlled at 700 DEG C, obtains smelting furnace mixture；
(5) nitrogen buffer gas, smelting furnace mixture, by solid waste raw material blowing rifle, deep spirt smelting furnace melts at a relatively high speed
Chi Zhong；
(6) by mill coal (including the single such as bituminous coal, anthracite, semi-coke powder or a variety of mixtures) through broken, grinding, drying
It is made coal dust, 200 mesh grade of coal dust control 90% passes through fuel injection rifle deep spirt smelting furnace at a relatively high speed；
(7) smelting furnace outfit oxygen-enriched hot air furnace, 900 DEG C of hot blast temperature, hot wind oxygen content 25%.Oxygen-enriched hot air is by furnace roof hot wind
Rifle is blown into furnace, and volatilization forms C particle and the reaction of smelting furnace mixture to mill coal rapidly at high temperature, restores metal oxide；
Another part and mixed powder are involved in clinker jointly, and reduction reaction is completed in slag；
(8) Fe, the Pb restored sinks to cupola well, and gravity is automatically separated to obtain metallic iron and lead, and Ti, V enter clinker, leads to
Cross physical method isolated metal Ti, V.
(9) flue gas after reacting is discharged out of the furnace by furnace top flue, is divided the elements such as carbon by gravity cyclone dust removal
It separates out and, carbonaceous dust can recycle again, and remaining flue gas separates and collects to obtain containing zinc, potassium, sodium by electrostatic fabric filter
Combination ash.
Embodiment 3
The embodiment of the present invention 3 discloses a kind of processing method of metallurgical solid waste, specifically comprises the following steps:
(1) first metallurgical solid waste is smashed and ground, crosses 6mm sieve screening；
It (2) is that 90:5:5 weighs metallurgical solid waste, containing calcium oxide and magnesium-containing oxide respectively according to mass ratio；Its
In, metallurgical solid waste include environmental dust removal ash, sintering dust, pelletizing dust, blast furnace dust, bof sludge, electric furnace dust mud,
One of solid waste such as steel slag, steel rolling dirt mud, iron scale, iron oxide red, coking, dust removing ash or a variety of mixtures, calcic oxygen
Compound includes quick lime, lime stone, the single of dolomite or a variety of mixtures, and magnesium-containing oxide includes magnesite, light-burned white clouds
Stone, serpentine, the single of dolomite or a variety of mixtures.
(3) the mixture moisture content 2wt% by mixture drying and dehydrating, after drying.
(4) mixture is subjected to prereduction, pre-reduction temperature is controlled at 700 DEG C, obtains smelting furnace mixture；
(5) nitrogen buffer gas, smelting furnace mixture, by solid waste raw material blowing rifle, deep spirt smelting furnace melts at a relatively high speed
Chi Zhong；
(6) by mill coal (including the single such as bituminous coal, anthracite, semi-coke powder or a variety of mixtures) through broken, grinding, drying
It is made coal dust, 200 mesh grade of coal dust control 90% passes through fuel injection rifle deep spirt smelting furnace at a relatively high speed；
(7) smelting furnace outfit oxygen-enriched hot air furnace, 900 DEG C of hot blast temperature, hot wind oxygen content 25%.Oxygen-enriched hot air is by furnace roof hot wind
Rifle is blown into furnace, and volatilization forms C particle and the reaction of smelting furnace mixture to mill coal rapidly at high temperature, restores metal oxide；
Another part and mixed powder are involved in clinker jointly, and reduction reaction is completed in slag；
(8) Fe, the Pb restored sinks to cupola well, and gravity is automatically separated to obtain metallic iron and lead, and Ti, V enter clinker, leads to
Cross physical method isolated metal Ti, V.
(9) flue gas after reacting is discharged out of the furnace by furnace top flue, is divided the elements such as carbon by gravity cyclone dust removal
It separates out and, carbonaceous dust can recycle again, and remaining flue gas separates and collects to obtain containing zinc, potassium, sodium by electrostatic fabric filter
Combination ash.
Embodiment 4
The embodiment of the present invention 4 discloses a kind of processing method of metallurgical solid waste, specifically comprises the following steps:
(1) first metallurgical solid waste is smashed and ground, crosses 6mm sieve screening；
It (2) is that 85:7:8 weighs metallurgical solid waste, containing calcium oxide and magnesium-containing oxide respectively according to mass ratio；Its
In, metallurgical solid waste include environmental dust removal ash, sintering dust, pelletizing dust, blast furnace dust, bof sludge, electric furnace dust mud,
One of solid waste such as steel slag, steel rolling dirt mud, iron scale, iron oxide red, coking, dust removing ash or a variety of mixtures, calcic oxygen
Compound includes quick lime, lime stone, the single of dolomite or a variety of mixtures, and magnesium-containing oxide includes magnesite, light-burned white clouds
Stone, serpentine, the single of dolomite or a variety of mixtures.
(3) the mixture moisture content 1wt% by mixture drying and dehydrating, after drying.
(4) mixture is subjected to prereduction, pre-reduction temperature is controlled at 750 DEG C, obtains smelting furnace mixture；
(5) nitrogen buffer gas, smelting furnace mixture, by solid waste raw material blowing rifle, deep spirt smelting furnace melts at a relatively high speed
Chi Zhong；
(6) by mill coal (including the single such as bituminous coal, anthracite, semi-coke powder or a variety of mixtures) through broken, grinding, drying
It is made coal dust, 200 mesh grade of coal dust control 90% passes through fuel injection rifle deep spirt smelting furnace at a relatively high speed；
(7) smelting furnace outfit oxygen-enriched hot air furnace, 1000 DEG C of hot blast temperature, hot wind oxygen content 30%.Oxygen-enriched hot air is by furnace roof warm
Air pressure gun is blown into furnace, and volatilization forms C particle and the reaction of smelting furnace mixture to mill coal rapidly at high temperature, restores metal oxidation
Object；Another part and mixed powder are involved in clinker jointly, and reduction reaction is completed in slag；
(8) Fe, the Pb restored sinks to cupola well, and gravity is automatically separated to obtain metallic iron and lead, and Ti, V enter clinker, leads to
Cross physical method isolated metal Ti, V.
(9) flue gas after reacting is discharged out of the furnace by furnace top flue, is divided the elements such as carbon by gravity cyclone dust removal
It separates out and, carbonaceous dust can recycle again, and remaining flue gas separates and collects to obtain containing zinc, potassium, sodium by electrostatic fabric filter
Combination ash.
Embodiment 5
The embodiment of the present invention 5 discloses a kind of processing method of metallurgical solid waste, specifically comprises the following steps:
(1) first metallurgical solid waste is smashed and ground, crosses 6mm sieve screening；
It (2) is that 90:5:5 weighs metallurgical solid waste, containing calcium oxide and magnesium-containing oxide respectively according to mass ratio；Its
In, metallurgical solid waste include environmental dust removal ash, sintering dust, pelletizing dust, blast furnace dust, bof sludge, electric furnace dust mud,
One of solid waste such as steel slag, steel rolling dirt mud, iron scale, iron oxide red, coking, dust removing ash or a variety of mixtures, calcic oxygen
Compound includes quick lime, lime stone, the single of dolomite or a variety of mixtures, and magnesium-containing oxide includes magnesite, light-burned white clouds
Stone, serpentine, the single of dolomite or a variety of mixtures.
(3) the mixture moisture content 1wt% by mixture drying and dehydrating, after drying.
(4) mixture is subjected to prereduction, pre-reduction temperature is controlled at 750 DEG C, obtains smelting furnace mixture；
(5) nitrogen buffer gas, smelting furnace mixture, by solid waste raw material blowing rifle, deep spirt smelting furnace melts at a relatively high speed
Chi Zhong；
(6) by mill coal (including the single such as bituminous coal, anthracite, semi-coke powder or a variety of mixtures) through broken, grinding, drying
It is made coal dust, 200 mesh grade of coal dust control 90% passes through fuel injection rifle deep spirt smelting furnace at a relatively high speed；
(7) smelting furnace outfit oxygen-enriched hot air furnace, 1100 DEG C of hot blast temperature, hot wind oxygen content 40%.Oxygen-enriched hot air is by furnace roof warm
Air pressure gun is blown into furnace, and volatilization forms C particle and the reaction of smelting furnace mixture to mill coal rapidly at high temperature, restores metal oxidation
Object；Another part and mixed powder are involved in clinker jointly, and reduction reaction is completed in slag；
(8) Fe, the Pb restored sinks to cupola well, and gravity is automatically separated to obtain metallic iron and lead, and Ti, V enter clinker, leads to
Cross physical method isolated metal Ti, V.
(9) flue gas after reacting is discharged out of the furnace by furnace top flue, is divided the elements such as carbon by gravity cyclone dust removal
It separates out and, carbonaceous dust can recycle again, and remaining flue gas separates and collects to obtain containing zinc, potassium, sodium by electrostatic fabric filter
Combination ash.
The obtained part metals product proportion of 1000KG material consumed to above-described embodiment 1~5 and fuel consumption carries out pair
Than as a result as shown in table 1 below.
Table 1
It can be clear that by the data in above-mentioned table 1, the embodiment of the present invention 1~5 consumes what 1000KG material obtained
Part metals product increases with the increase of metallurgical solid waste, and fuel consumption is dropped with the increase of metallurgical solid waste
It is low, it reduces with the raising of pre-reduction temperature, is reduced with the increase of hot blast temperature, dropped with the increase of oxygen content in hot wind
It is low, illustrate that the present invention is implemented with the recycling and utilization for being conducive to carry out resource.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.For device disclosed in embodiment
For, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, related place is said referring to method part
It is bright.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of processing method of metallurgical solid waste, which is characterized in that specifically comprise the following steps:
(1) to bulk metallurgical solid waste by crushing grinding ,≤the particle powder of 6mm is made；
(2) by broken metallurgical solid waste cooperation metallurgical production environmental dust removal ash, sintering dust, pelletizing dust, blast furnace
The solid waste such as dust, bof sludge, electric furnace dust mud, steel slag and steel rolling dirt mud solid waste contain calcium oxide, contain magnesia
Compound mixes in proportion, stirs evenly, and mixture is made；
(3) by mixture drying and dehydrating, and prereduction is carried out, obtains smelting furnace mixture；
(4) nitrogen buffer gas passes through smelting furnace mixture in solid waste raw material blowing rifle at a relatively high speed deep spirt furnace crucible；
(5) coal dust is made through broken, grinding, drying in mill coal, passes through fuel injection rifle deep spirt smelting furnace at a relatively high speed；
(6) smelting furnace is equipped with oxygen-enriched hot air furnace, and oxygen-enriched hot air is blown into furnace by furnace roof heat gun, and mill coal volatilizees rapidly at high temperature
C particle and the reaction of smelting furnace mixture are formed, metal oxide is restored；Another part and mixed powder are involved in clinker jointly, molten
Reduction reaction is completed in slag；
(7) Fe, the Pb restored sinks to cupola well, and gravity is automatically separated to obtain metallic iron and lead, and Ti, V enter clinker, pass through physics
Method isolated metal Ti, V.
(8) flue gas after reacting is discharged out of the furnace by furnace top flue, is gone out the element sepatations such as carbon by gravity cyclone dust removal
Come, carbonaceous dust can recycle again, and remaining flue gas separates and collects to obtain the mixing containing zinc, potassium, sodium by electrostatic fabric filter
Ash.
2. a kind of processing method of metallurgical solid waste according to claim 1, which is characterized in that the step (1)
Middle bulk metallurgical solid waste includes converter slag, iron scale, the single of slag iron or a variety of mixtures.
3. a kind of processing method of metallurgical solid waste according to claim 1, which is characterized in that the step (2)
It include quick lime, lime stone, the single of dolomite or a variety of mixtures containing calcium oxide.
4. a kind of processing method of metallurgical solid waste according to claim 3, which is characterized in that the step (2)
Magnesium-containing oxide includes magnesite, light dolomite, serpentine, the single of dolomite or a variety of mixtures.
5. a kind of processing method of metallurgical solid waste according to claim 4, which is characterized in that the step (2)
The ratio mixed in proportion is metallurgical solid waste, the mass percent containing calcium oxide, magnesium-containing oxide is 80~95:1
~10:4~10.
6. a kind of processing method of metallurgical solid waste according to claim 1, which is characterized in that the step (3)
Mixture drying and dehydrating, mixture moisture content≤2wt% after drying.
7. a kind of processing method of metallurgical solid waste according to claim 6, which is characterized in that the step (3)
The temperature control for carrying out prereduction is 750 DEG C ± 50 DEG C.
8. a kind of processing method of metallurgical solid waste according to claim 1, which is characterized in that the step (5)
Mill coal includes bituminous coal, anthracite, the single of semi-coke powder or a variety of mixtures.
9. a kind of processing method of metallurgical solid waste according to claim 8, which is characterized in that the step (5)
Coal dust, 200 mesh grade >=90% of coal dust is made through broken, grinding, drying in mill coal.
10. a kind of processing method of metallurgical solid waste according to claim 1, which is characterized in that the step (6)
Smelting furnace is equipped with oxygen-enriched hot air furnace, and hot blast temperature is 900 DEG C -1200 DEG C, and hot wind oxygen content is 25%-40%.
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| CN111074067A (en) * | 2020-01-11 | 2020-04-28 | 武钢集团昆明钢铁股份有限公司 | Preparation method of carbonized sludge particles for iron ore powder sintering additive |
| CN111074076A (en) * | 2019-11-29 | 2020-04-28 | 唐山鹤兴废料综合利用科技有限公司 | Comprehensive utilization system and method for metallurgical solid waste |
| CN113265534A (en) * | 2021-04-14 | 2021-08-17 | 嘉峪关宏电铁合金有限责任公司 | Low-grade ferrochromium slag recycling production process |
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