CN104831006B - It is a kind of to reclaim the method that refining waste residue produces molten steel covering agent - Google Patents
It is a kind of to reclaim the method that refining waste residue produces molten steel covering agent Download PDFInfo
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- CN104831006B CN104831006B CN201510099384.1A CN201510099384A CN104831006B CN 104831006 B CN104831006 B CN 104831006B CN 201510099384 A CN201510099384 A CN 201510099384A CN 104831006 B CN104831006 B CN 104831006B
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
Abstract
It is a kind of to reclaim the method that refining waste residue produces molten steel covering agent, comprise the following steps：The refining waste residue in ladle is remained in after steel mill's continuous casting is terminated and pours into collection slag ladle, adjustment temperature, chemical composition and viscosity, collection slag ladle is inclined, liquid refining waste residue is set uniformly to flow down, the refining waste residue that lower fluid lower section compressed-air atomizer is directed at flowing simultaneously is blown, and makes refining waste residue splash to cooling down rapidly in air, and hollow graininess refining waste residue is obtained after cooling, carry out except iron, screening, detection, packaging, that is, obtaining final molten steel covering agent after collection；The temperature is adjusted to 1500 ~ 1580 DEG C；The viscosity is controlled to 0.05 ~ 1.50Pa.S；Ore deposit phase stabiliser is added in the refining waste residue, the ore deposit phase stabiliser is Na2O, Na2O content is 0.5 ~ 3.0wt% of refining waste residue mass percent.The waste heat of refining waste residue is made full use of, recycling process is simple, added value of product are high, can preferably improve Environmental Protection at Steel Works, realize energy-saving and emission-reduction.
Description
Technical field
The present invention relates to a kind of metallurgical slag comprehensive utilization new method, the comprehensive profit of recovery of more particularly to a kind of refining waste residue
With the new method of production molten steel covering agent.
Background technology
Being refined to molten steel, in alloying process, refining slag will be added in refining furnace, addition is typically 10
~ 25kg/t steel, after continuous casting terminates, these refining slags reform into refining waste residue, and refining waste residue is that the main solid of metallurgical process gives up
One of gurry, the whole nation increases refining waste residue newly more than 15,000,000 tons every year.
Refining waste residue refers to remain in this operative liquid slag in ladle after molten steel continuous casting terminates, its quantity is about 10 ~
25 kgs/tonne of steel, its physical and chemical index is as shown in Table 1.Steel mill typically mixes this part slag and other slags, transports to
Slag is as solid waste treatment.
The typical compositional ranges of the refining waste residue of table 1（%）
The typical ore deposit phase of the refining waste residue of table 2
It is observed that research, this part refining waste residue is also in the presence of value very high.[1] waste heat.When continuous casting is finished, this part
Refining waste residue is also in a liquid state presence, and temperature is about at 1350 ~ 1500 DEG C.[2] desulfurization.After terminating due to refining, the FeO in slag
Content is less than 1.0%, and oxygen activity is very low, and basicity is typically more than 3.0, and sulfur capacity is very high, and the desulphurizing ability of general refining slag also has
50 ~ 70% are not utilized.[3] absorption is mingled with.Refining waste residue is much like with pre-melted slag on composition and ore deposit phase, with very strong
Be mingled with adsorption capacity.[4] its chemical analysis is similar to the chemical analysis of alkaline molten steel covering agent, only need to slightly adjust or nothing
The chemical analysis requirement that may conform to basic steel water coverture need to be adjusted.
In the past, metallargist was also devoted to recycling above-mentioned refining waste residue always, up to the present, refining
Waste residue recycle Main way be：[1] slag cement or cement additire are done.Chinese patent CN1014704B is disclosed
A kind of utilization method for steel scoria, it is used as cement raw material or additive after adding the modifying agents such as silicate, smithsonite in slag.Its
Complex process, value is low.[2] reuse is carried out inside iron and steel enterprise, mainly using iron therein and flux component, mesh
Before be mainly used as staflux, slagging agent, covering slag etc..United States Patent (USP) US6179895B1 andUS6174347B1Disclose one kind
Using reclaiming the method that refinery cinder does tundish covering flux, the method is that will reclaim after refinery cinder screening, mixing directly
Utilize, spreadability is bad, bulk density is excessive, does not have the effect of insulation, and tundish can be caused to crust quickly, production cannot be after
It is continuous to carry out.United States Patent (USP) US6189818B1 discloses a kind of method using refinery cinder is recycled, and the method is smart by liquid
After refining slag pours into solidification on chill plate, cooling, broken, screening, continue to be used as refined synthetic slag.Chinese patent CN1597997 is public
A kind of copper smelter slag stepped utilization method is opened, in steel smelting procedure, after the slag of rear step operation output is added into regulator
Return step by step and be applied to preceding processes.[3] as ceramics and construction material.Chinese patent CN1966456 discloses a kind of profit
The waste slag of steel is produced with steel plant（Grain slag）The method of the raw material of factory as construction ceramic product, category ceramic raw material field.[4] its
Its purposes.Chinese patent CN101259987 discloses a kind of method that utilization blast furnace slag prepares devitrified glass, and blast furnace slag is crushed
After sieving, other raw materials are added, be made devitrified glass.It can only use blast-furnace slag and production technology is also very complicated.
In sum, the comprehensive utilizating research in recent years to refining waste residue has occurred in that many achievements, but to some extent
In the presence of using complex process, using high cost, using the low deficiency of added value of product.According to statistics, the blast furnace utilization of each steel mill
More than 85%, the comprehensive utilization ratio of refining waste residue is less than 10% to rate.It is a kind of disclosed in Chinese patent CN200810244441.0
Using the method that refining slag prepares covering slag is reclaimed, the method is recovery after waste residue cooling efflorescence to be refined, the refining that will be reclaimed
After the adjustment of waste residue composition, additive slurrying is added, then carry out mist projection granulating, although the method added value of product is preferably, should
Method could not make good use of the waste heat of refining waste residue, during slurrying and mist projection granulating, due to need to add necessary binding agent and
Additive, this objectively causes secondary pollution.Chinese patent CN1970197 is disclosed in a kind of spherical hollow type of high alkalinity
Between covering agent, it uses fritting, high alkalinity, carbon-free raw material, by atomizing granulating technology, produces tundish covering flux, its
There is part in raw material using LF refining slag, and require that the mesh percent of pass of granularity 200 is not less than 96%, but undisclosed specifically used method.
It is called LF furnace refining slags that professional's general custom prepares to add the slag charge for refining in LF stoves, and the slag after use is referred to as essence
Refining waste residue reclaims refining slag；And only technique is covered etc. by broken, thunder could obtain the mesh percent of pass of granularity 200 and be not less than
96% fine powder, this technique has been mixed into other impurity, increased use cost, and destroy the lattice structure of refining waste residue.
Production cost is also greatly increased using the raw material of fritting.
Molten steel covering agent refers to after refining terminates, to be added in the coverture on molten steel surface in ladle and tundish, mainly
Insulation effect is played, alkaline molten steel covering agent is more beneficial for absorption and is mingled with, and prevents secondary oxidation.The alkaline molten steel covering agent of production at present
Atomizing granulating technology is mostly used, this technique productions coverture out is hollow, this sky in the centre of each particle
Core structure greatly reduces small product size density, strengthens the heat-insulating property of coverture.
Melt blowing granulation technology is that the material that will be melted produces hollow ball by compressed air spraying, is mainly used in oxidation
The production of aluminium corundum bollow ball, Chinese patent CN1789197A discloses a kind of using melt blowing granulation technology production corundum
The method of hollow ball, the method melt is the Al of purification2O3, single-phase melt is can be considered, injection temperature is 1900 ~ 2400 DEG C, nozzle
Diameter is 30 ~ 60mm, and melt viscosity is not required.Do not find that this technology is used for the production of molten steel covering agent at present, this is
Because the chemical analysis of corundum melt is relatively simple, ore deposit mutually also has no change.Produce the material melt property of molten steel covering agent
It is very different with alumina melt performance, wherein containing CaO and SiO2 higher, whole melt belongs to thing more than quaternary
Phase, Mineralogical changes are simple to be blown molten steel covering agent or refining waste residue melt as injection alumina melt up to as many as tens kinds,
Cannot get suitable hollow ball product at all.Want to produce qualified hollow ball-shape molten steel by melt blowing granulation technology and cover
Lid agent comes, it is necessary to the material melt to producing molten steel covering agent do deeply, the theory of system and experimental study, find out suitable spray
Blow moulding parameter is come.If this is studied successfully, can save fritting raw material is broken, milling, adding additives, slurrying, spraying
The series of process processes such as granulation, make full use of the melting waste heat of refining waste residue, have both saved mass energy and cost, also reduce
Pollution of the above-mentioned technical process to coverture, concise production process is easy.
The content of the invention
Present invention aim to overcome that the deficiency that above-mentioned prior art is present, there is provided a kind of to make full use of the remaining of refining waste residue
Heat, recycling process is simple, added value of product are high, can preferably improve Environmental Protection at Steel Works, realize the recovery refining of energy-saving and emission-reduction
The method that waste residue produces molten steel covering agent.
To realize the object of the invention, there is provided following technical scheme：A kind of refining waste residue that reclaims produces molten steel covering agent
Method, it is characterised in that comprise the following steps：The refining waste residue in ladle is remained in after steel mill's continuous casting is terminated and pours into collection slag ladle,
Adjustment temperature, chemical composition and viscosity, collection slag ladle is inclined, and liquid refining waste residue is uniformly flowed down, while lower fluid lower section is used
The refining waste residue injection of compressed-air atomizer alignment flowing, makes refining waste residue splash to cooling down rapidly in air, is obtained final product after cooling
Carry out except iron, screening, detection, packaging, that is, obtaining final molten steel covering agent to hollow graininess refining waste residue, after collection；
Described temperature adjustment because in actual production, because of the adjustment or fluctuation of various process parameters, per stove steel continuous casting
At the end of the temperature of refining waste residue be not quite similar, and research shows, can suitable refining waste residue temperature obtain ideal to injection
Hollow coverture it is extremely important, temperature is too high, while wasting fuel the particle that injection is obtained can be made too small, or even obtain
It is full particle；Temperature is too low, and injection can be made to carry out, and what injection was obtained will be full particle.Suitable temperature is adjusted to
1500~1580℃。
Adjustment viscosity of the present invention is because can the viscosity of refining waste residue obtain preferable hollow molten steel to injection
Coverture is most important, and this is one of core of the invention.Viscosity is an important physical property of liquid slag, and it is with slag
Chemical composition, temperature, the equal factor of ore deposit it is relevant, viscosity is improper, and no matter viscosity is higher or relatively low, and reason is all can not form after injection
The hollow form particle thought, research shows, for liquid refining waste residue, suitable range of viscosities is：0.05 ~ 1.50Pa.S, most preferably
Range of viscosities be：0.10 ~ 0.50Pa.S, viscosity can be adjusted by temperature and chemical composition.
Ore deposit phase stabiliser is added in the refining waste residue, the ore deposit phase stabiliser is Na2O, Na2O content is refining waste residue matter
Measure 0.5 ~ 3.0wt% of percentage.
Preferably, compressed-air atomizer is one group of three row closely coming individual nozzle together, the nozzle often arranged side by side
Position is staggered setting, the 3 ~ 5mm of diameter of nozzle；This diameter can guarantee that particle diameter distribution that injection obtains in 0.5 ~ 4.0mm
Ratio it is maximum；The number of nozzle is determined by the slag flow port width of collection slag ladle, it is ensured that both sides it is wider than slag stream width go out 50 ~
100mm, nozzle and horizontal line angle into 40 ~ 60 degree of angles.So ensure that the little particle being blown out has cooling most long in the air
Time.
Preferably, the Stress control of the compressed air of compressed-air atomizer is in 6 ~ 10kg/cm2。
Preferably, collection slag ladle is shaped as subcontracting in molten iron week for steel mill, interior block has firebrick lining, and the requirement of bricking refractoriness is big
In 1700 DEG C, after its capacity is to install every bag refining waste residue, the top of the slag leaves 500 ~ 800mm free spaces.Adjustment can so be ensured
The space of composition, and when temperature is adjusted, it is outer that flame gun is not exposed at bag.
To realize the object of the invention, there is provided another technical scheme：One kind reclaims refining waste residue production molten steel covering agent
Method, it is characterised in that comprise the following steps：The refining waste residue in ladle is remained in after steel mill's continuous casting is terminated and pours into collection slag
Tank, adjustment temperature, chemical composition and viscosity incline collection slag ladle, liquid refining waste residue is uniformly flowed down, while lower fluid lower section
The refining waste residue for being directed at flowing with compressed-air atomizer is blown, and makes refining waste residue splash to cooling down rapidly in air, after cooling i.e.
Hollow graininess refining waste residue is obtained, is carried out after collection except iron, screening, detection, packaging, that is, obtain final molten steel covering
Agent；
The temperature is adjusted to 1500 ~ 1580 DEG C；
The viscosity is controlled to 0.05 ~ 1.50Pa.S；
It is that the chemical analysis for obtaining hollow graininess refining waste residue is by mass percentage after the cooling：CaO 42~
52wt%, SiO25~10 wt%,MgO 5~8 wt%, Al2O320~30 wt%, FeO ≤1.5 wt%, CaF2 ≤5.0 wt%,
Na2O 0.5~3.0 wt%, P≤0.5 wt%, S≤0.5 wt% 。
Adjustment chemical composition of the present invention because in actual production, because steel grade and various process parameters adjustment or
Fluctuation, per stove steel continuous casting at the end of the chemical composition of refining waste residue be not quite similar, majority of case directly can be covered using doing molten steel
Lid agent, if there is the quick analysis ingredient in refining waste residue scene and the molten steel covering agent desired value differentiated situation of requirement, by scarce
What mends, lacks how much mend how many principles what, difference component is adjusted, is supplemented, then with coal gas or natural gas spraying gun
It is heated to target temperature.The chemical analysis of typical alkaline molten steel covering agent of the present invention is not unique restriction, specific alkali
The chemical analysis of property molten steel covering agent can be filled a vacancy principle and mutually should determine that according to the technical requirements of user as above-mentioned.
Ore deposit phase stabiliser described in the present invention refers to Na2O, this is another core of the invention.Na2O leads in coverture
It is often to be introduced as flux, is mainly used in adjusting fusing point, present invention discover that it has the effect for stablizing ore deposit phase, by Na2O makees
For ore deposit phase stabiliser is introduced into the present invention.Research shows that the greatest difficulty that liquid refining waste residue is blown into hollow particle is refining
Contain substantial amounts of C in waste residue2S （Dicalcium silicate）, there is α '-C when progressively cooling to 525 DEG C2S（Dicalcium silicate）Crystalline phase to
γ-C2The transformation of S crystalline phases, volumetric expansion 12% causes refining waste residue efflorescence.To solve this technical barrier, present invention introduces ore deposit
Phase stabiliser Na2O, experimental studies have found that, add Na2After O, C2S crystalline phases become relative and stabilize, C2S crystalline phases area broadens,
And expand to low-temperature space, after injection, under the conditions of air Quench, what is obtained is substantially hollow bead, optimal Na2O content
It is 0.5 ~ 3.0wt%, this causes to be blown multiphase melt such as liquid refining waste residue using blowing process to produce hollow spheres product
Become feasible.If being added without ore deposit phase stabiliser Na2O, in the particle obtained by injection significant proportion in broken shape, not into
The fine powder proportion of particle is also greatly increased.
Described in the present invention except iron be that the hollow bead that will have been cooled down is collected, will be therein by magnet before screening
Abrasive grit or the particle with iron are removed totally, and the abrasive grit of recovery directly melts down and utilized.
Screening described in the present invention refers to, by except the hollow bead after iron is sieved, to take wherein diameter in 0.5 ~ 4.0mm
In the range of part be used as molten steel covering agent, tail over part when solid waste treatment.0.5 ~ 4.0mm of diameter is chosen because will
Ensure auxiliary exhibition effect and heat-insulating property of the particle in molten steel surface, this particle size distribution is most preferable.
Beneficial effects of the present invention：One is to realize energy-saving and emission-reduction and recycling economy.By the original essence as waste disposal
Refining waste residue is transformed into the metallurgical auxiliary of high added value, while reducing the dust pollution of steel mill, improves working environment.Two
It is extremely low cost.Compared with routine pre-melted slag makees raw material production molten steel covering agent, eliminate fritting, broken, Lei Meng, spraying and make
Grain etc. operation, take full advantage of the waste heat of refining waste residue, according to measuring and calculating, often using one ton of liquid refining waste residue, can save fuel into
This 800 yuan, 300 yuan of processing cost is saved, produce 5000000 tons of medium-sized steel mills of steel per year, it is annual to produce refining waste residue more than 100,000 tons,
By 80% utilization rate, in year cost-saved 88,000,000, add and reclaim the benefit of residual iron in slag and reduce treatment solid waste
Cost, year economic benefit can be more than 100,000,000 yuan.Three is that the molten steel covering agent performance for producing is more superior.Because, fritting raw material
Raw material is set to be crushed to below 100 mesh through external force such as broken, thunder illiteracies, by additional bonding agent mist projection granulating balling-up.On the one hand, upper art
Technique is destroyed many ore deposit phase lattice structures, and destroyed lattice makes the hollow ball of finished product easily rupturable, causes to use effect
Fruit reduces；On the other hand, atomizing granulating technology needs additional multiple additives and bonding agent, this inherently one pollution sources.It is logical
Cross technique of the invention directly carries out blowing granulation to liquid refining waste residue, does not have any additive, ore deposit phase and composition and refining
Slag is essentially identical, and obvious superiority is embodied on metallurgical function.It is mist projection granulating production to distinguish hollow molten steel covering agent
Or the direct blowing granulation production of melt, as long as seeing the composition in molten steel covering agent either with or without additive or bonding agent
.
Brief description of the drawings
Fig. 1 is nozzle facade schematic diagram of the invention.
Specific embodiment
Below by way of specific implementation example, the present invention is further described.
Embodiment 1：
Continuous casting is terminated into refining waste residue remaining in rear ladle and pours into collection slag ladle, be transported to injection workshop, measure temperature 1515
DEG C, measure the Pa.S of viscosity 0.30, chemical analysis refining waste residue composition such as following table（%）：
Above-mentioned chemical analysis results meet the chemical analysis requirement of molten steel covering agent, and itself contains 0.50% Na2O, claims
This tank refining waste residue melt weight is 1.62 tons, and the refining waste residue temperature for measuring, viscosity meet injection condition, using 8 kg/cm2
Compressed air be blown, nozzle and horizontal line angle spray into 50 degree angles, nozzle diameter 3.5mm, each 10 of 3 row arranged side by side
Mouth, overall width 600mm.Injection is cooled to room temperature after terminating, and is carried out except iron with magnet after collection, and iron content particle returns to steel mill's profit
With remainder is sieved, and screening is obtained into the part packaging in the range of 0.5 ~ 4.0mm, as molten steel covering agent, its chemistry
Composition is identical with upper table.Part is tailed over as solid waste treatment.
Embodiment 2：
Continuous casting is terminated into refining waste residue remaining in rear ladle and pours into collection slag ladle, be transported to injection workshop, measure temperature 1390
DEG C, chemical analysis refining waste residue composition such as following table（%）：
Above-mentioned chemical analysis results do not meet molten steel covering agent requirement, and the refining waste residue temperature for measuring is relatively low, claims to obtain this tank
Refining waste residue melt weight is 1.23 tons, supplements quartz sand 60kg, magnesia 50kg, Na2O 30kg, are heated with gas spray gun, are surveyed
1550 DEG C of temperature is obtained, the Pa.S of viscosity 0.08 is measured, is met injection and is required, using 10 kg/cm2Compressed air be blown,
Nozzle and horizontal line angle in angle of 45 degrees, nozzle diameter 4.0mm, each 10 nozzles of 3 row arranged side by side, overall width 600mm.Injection knot
Room temperature is cooled to after beam, is carried out except iron with magnet after collection, iron content particle returns to steel mill's utilization, and remainder is sieved, will
Screening obtains the part packaging in the range of 0.5 ~ 4.0mm, and as molten steel covering agent, its chemical composition see the table below.Part is tailed over to work as
Make solid waste treatment.
Embodiment 3：
Continuous casting is terminated into refining waste residue remaining in rear ladle and pours into collection slag ladle, be transported to injection workshop, measure temperature 1460
DEG C, chemical analysis refining waste residue composition such as following table（%）：
Above-mentioned chemical analysis results do not meet molten steel covering agent requirement, this tank refining waste residue melt weight is called 1.25
Ton, supplements lime 170kg, supplements Na2O 40kg, are heated with gas spray gun, measure 1580 DEG C of temperature, measure viscosity 0.05
Pa.S, meets injection and requires, using 6 kg/cm2Compressed air be blown, nozzle and horizontal line angle into 40 degree of angles,
Nozzle diameter 3.0mm, each 10 nozzles of 3 row arranged side by side, overall width 600mm.Injection is cooled to room temperature after terminating, and magnet is used after collection
Return to steel mill and utilize except iron, iron content particle, remainder is sieved, and screening is obtained the portion in the range of 0.5 ~ 4.0mm
Subpackage is filled, and as molten steel covering agent, its chemical composition see the table below.Part is tailed over as solid waste treatment.
| CaO | SiO2 | MgO | Al2O3 | FeO | CaF2 | Na2O | P | S |
| 46.35 | 9.83 | 7.74 | 28.38 | 0.78 | 2.80 | 2.81 | 0.28 | 0.35 |
Embodiment 4：
Continuous casting is terminated into refining waste residue remaining in rear ladle and pours into collection slag ladle, be transported to injection workshop, measure temperature 1405
DEG C, chemical analysis refining waste residue composition such as following table（%）.
| CaO | SiO2 | MgO | Al2O3 | FeO | CaF2 | Na2O | P | S |
| 51.5 | 11.00 | 8.60 | 19.70 | 0.80 | 0.80 | -- | 0.44 | 0.47 |
Above-mentioned chemical analysis results do not meet molten steel covering agent requirement, this tank refining waste residue melt weight is called 1.75
Ton, supplements alumina 170kg, supplements Na2O 40kg, are heated with natural gas spraying gun, measure 1500 DEG C of temperature, measure viscosity 0.50
Pa.S, meets injection and requires, using 7 kg/cm2Compressed air be blown, nozzle and horizontal line angle in angle of 45 degrees,
Nozzle diameter 3.0mm, each 10 nozzles of 3 row arranged side by side, overall width 600mm.Injection is cooled to room temperature after terminating, and magnet is used after collection
Return to steel mill and utilize except iron, iron content particle, remainder is sieved, and screening is obtained the portion in the range of 0.5 ~ 4.0mm
Subpackage is filled, and as molten steel covering agent, its chemical composition see the table below.Part is tailed over as solid waste treatment.
。
Claims (5)
1. it is a kind of to reclaim the method that refining waste residue produces molten steel covering agent, it is characterised in that to comprise the following steps：By steel mill's continuous casting
The refining waste residue in ladle is remained in after end and pours into collection slag ladle, adjustment temperature, chemical composition and viscosity incline collection slag ladle,
Liquid refining waste residue is uniformly flowed down, while the refining waste residue that lower fluid lower section compressed-air atomizer is directed at flowing is blown, make
Refining waste residue splash obtains hollow graininess refining waste residue to cooling down rapidly in air after cooling, carried out after collection except iron,
Screening, detection, packaging, that is, obtain final molten steel covering agent；
The temperature is adjusted to 1500 ~ 1580 DEG C；
The viscosity is controlled to 0.05 ~ 1.50Pa.S；
Ore deposit phase stabiliser is added in the refining waste residue, the ore deposit phase stabiliser is Na2O, Na2O content is refining waste residue quality hundred
Divide 0.5 ~ 3.0wt% of ratio.
2. the method that a kind of recovery refining waste residue according to claim 1 produces molten steel covering agent, it is characterised in that compression
Air nozzle is that one group of three row closely comes individual nozzle together side by side, and the nozzle location often arranged staggers setting, nozzle it is straight
3 ~ 5mm of footpath；The number of nozzle is determined by the slag flow port width of collection slag ladle, it is ensured that both sides it is wider than slag stream width go out 50 ~ 100mm；
Nozzle and horizontal line angle into 40 ~ 60 degree of angles.
3. the method that a kind of recovery refining waste residue according to claim 2 produces molten steel covering agent, it is characterised in that compression
The Stress control of the compressed air of air nozzle is in 6 ~ 10kg/cm2。
4. the method that a kind of recovery refining waste residue according to claim 1 produces molten steel covering agent, it is characterised in that collection slag
The molten iron week that tank is shaped as steel mill subcontracts, and interior block has a firebrick lining, and the requirement of bricking refractoriness is more than 1700 DEG C, and its capacity is installing
Often after bag refining waste residue, the top of the slag leaves 500 ~ 800mm free spaces.
5. it is a kind of to reclaim the method that refining waste residue produces molten steel covering agent, it is characterised in that to comprise the following steps：By steel mill's continuous casting
The refining waste residue in ladle is remained in after end and pours into collection slag ladle, adjustment temperature, chemical composition and viscosity incline collection slag ladle,
Liquid refining waste residue is uniformly flowed down, while the refining waste residue that lower fluid lower section compressed-air atomizer is directed at flowing is blown, make
Refining waste residue splash obtains hollow graininess refining waste residue to cooling down rapidly in air after cooling, carried out after collection except iron,
Screening, detection, packaging, that is, obtain final molten steel covering agent；
The temperature is adjusted to 1500 ~ 1580 DEG C；
The viscosity is controlled to 0.05 ~ 1.50Pa.S；
It is that the chemical analysis for obtaining hollow graininess refining waste residue is by mass percentage after the cooling：CaO 42~
52wt%, SiO2 5~10 wt%,MgO 5~8 wt%, Al2O3 20~30 wt%, FeO ≤1.5 wt%, CaF2 ≤5.0
wt%, Na2O 0.5~3.0 wt%, P≤0.5 wt%, S≤0.5 wt% 。
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| CN106011383A (en) * | 2016-07-06 | 2016-10-12 | 登封市少林刚玉有限公司 | Processing method of steel-making hollow covering agent with ultra-light weight and low volume density |
| CN110218100A (en) * | 2019-07-20 | 2019-09-10 | 兰州理工大学 | A kind of method that nickel-iron smelting high-temperature slag prepares hollow ceramic microspheres |
| CN111041155A (en) * | 2019-12-23 | 2020-04-21 | 山东钢铁股份有限公司 | Medium-carbon alkaline molten steel heat-preservation covering agent and preparation method thereof |
| CN114317988A (en) * | 2021-12-23 | 2022-04-12 | 太原嘉能动力科技有限公司 | Device and method for sensible heat recovery of magnesium slag |
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| US6179895B1 (en) * | 1996-12-11 | 2001-01-30 | Performix Technologies, Ltd. | Basic tundish flux composition for steelmaking processes |
| CN1290641C (en) * | 2005-07-01 | 2006-12-20 | 河北理工大学 | Method of producing continuous casting protective slag by electric furnace premelt blowing granulation |
| CN1970198A (en) * | 2006-12-06 | 2007-05-30 | 上海盛宝钢铁冶金炉料有限公司 | High basicity tundish cover agent and its production method |
| CN1970197A (en) * | 2006-12-06 | 2007-05-30 | 上海盛宝钢铁冶金炉料有限公司 | High basicity tundish cover agent and its production method |
| CN101433950B (en) * | 2008-12-03 | 2011-07-27 | 宜兴市振球炉料有限公司 | Method for preparing protecting residue from recovery refining slag |
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