CN106045301B - A method of producing mineral wool using converter molten state early period slag - Google Patents
A method of producing mineral wool using converter molten state early period slag Download PDFInfo
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- CN106045301B CN106045301B CN201610369708.3A CN201610369708A CN106045301B CN 106045301 B CN106045301 B CN 106045301B CN 201610369708 A CN201610369708 A CN 201610369708A CN 106045301 B CN106045301 B CN 106045301B
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- slag
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- molten state
- early period
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- 239000002893 slag Substances 0.000 title claims abstract description 167
- 239000011490 mineral wool Substances 0.000 title claims abstract description 89
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 41
- 230000004048 modification Effects 0.000 claims abstract description 40
- 238000006011 modification reaction Methods 0.000 claims abstract description 40
- 239000003638 reducing agent Substances 0.000 claims abstract description 32
- 238000003723 Smelting Methods 0.000 claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 claims abstract description 30
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 24
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims abstract description 22
- 229920000742 Cotton Polymers 0.000 claims abstract description 21
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims abstract description 11
- 238000002156 mixing Methods 0.000 claims abstract description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 34
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 22
- PNEYBMLMFCGWSK-UHFFFAOYSA-N AI2O3 Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 21
- 229910052593 corundum Inorganic materials 0.000 claims description 21
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 21
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium monoxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 20
- 229910052681 coesite Inorganic materials 0.000 claims description 20
- 229910052906 cristobalite Inorganic materials 0.000 claims description 20
- 229910052904 quartz Inorganic materials 0.000 claims description 20
- 239000000377 silicon dioxide Substances 0.000 claims description 20
- 229910052682 stishovite Inorganic materials 0.000 claims description 20
- 229910052905 tridymite Inorganic materials 0.000 claims description 20
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 18
- 229910000831 Steel Inorganic materials 0.000 claims description 17
- 239000010959 steel Substances 0.000 claims description 17
- 239000004927 clay Substances 0.000 claims description 10
- 229910052570 clay Inorganic materials 0.000 claims description 10
- 239000006063 cullet Substances 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 10
- 239000010881 fly ash Substances 0.000 claims description 8
- 238000007792 addition Methods 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract description 15
- 229910052710 silicon Inorganic materials 0.000 abstract description 15
- 239000010703 silicon Substances 0.000 abstract description 15
- 239000004411 aluminium Substances 0.000 abstract description 14
- 238000006243 chemical reaction Methods 0.000 abstract description 7
- 238000004064 recycling Methods 0.000 abstract description 5
- 230000020169 heat generation Effects 0.000 abstract 1
- 238000006722 reduction reaction Methods 0.000 description 16
- 239000004615 ingredient Substances 0.000 description 15
- 239000007788 liquid Substances 0.000 description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 9
- 239000000126 substance Substances 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 4
- 238000007493 shaping process Methods 0.000 description 4
- 239000000571 coke Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000010924 continuous production Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 238000000265 homogenisation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- -1 silicon Iron Chemical compound 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 229910017976 MgO 4 Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002378 acidificating Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 238000011030 bottleneck Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000000703 high-speed centrifugation Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000007885 magnetic separation Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000010310 metallurgical process Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Inorganic materials [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C13/00—Fibre or filament compositions
- C03C13/06—Mineral fibres, e.g. slag wool, mineral wool, rock wool
Abstract
The invention discloses a kind of methods producing mineral wool using converter molten state early period slag, belong to Slag Wool Production field.Converter molten state early period slag is poured into smelting furnace by the present invention, and reducing agent and modification agent are added in toppling process, restore quenched；After standing 0.5~1.5 hour after agitated mixing, slag of the temperature between 1380 DEG C~1430 DEG C is sent to cotton equipment processed and is processed into mineral wool.The present invention has given full play to the double dominant of molten state slag itself " slag " and " heat ", using ferrosilicon, aluminum shot as reducing agent, silicon, aluminium and reacting for ferriferous oxide are silicon thermal response, thermit reaction, can meet the heat supply for entirely restoring quenched process with a large amount of heat generation.Recrement is directly prepared into the mineral wool of high added value after recycling valuable element, comprehensively recyling for molten state slag is realized, not only solves the emission problem of slag, the production cost of mineral wool can also be reduced, there is preferable economy and environmental benefit.
Description
Technical field
The present invention relates to Slag Wool Production fields, and converter molten state early period slag is utilized more specifically to a kind of
The method for producing mineral wool.
Background technology
The sustainable development of steel industry need to break through the utilization of resources constraint bottleneck, slag as carry can resource, no matter its
Using energy source, the utilization of resources, or it is not only urgent but also necessary as new inorganic non-metallic materials utilization.What converter smelting was toppled over
Molten state slag has abundant high temperature thermal resource, metals resources and CaO, MgO, SiO2、Al2O3Equal useful components.Experiment
It measuring, heat content when 1600 DEG C of slag is 2000KJ/kg, the releasable 1600-1800MJ/ tons of slag of 1 ton of liquid slag of water quenching cooling,
It is equivalent to the heat of 55-61kg standard coals.
Currently, hot steel slag, other than small part returns to metallurgical process recycling, mainly still first passing through cooling medium will
Slag is transformed into cold conditions from hot, is then used again.Cooling treatment is used to molten state slag, then carries out magnetic separation recovery gold
The industrial flow of category, convenient for mechanization, technological process is simple, cost is relatively low.But be also easy to produce waste water, dust and pollute environment, and
And the waste of slag high temperature resource and ferriferous oxide and tailings resource is also resulted in, belong to the lower treatment process of added value.
Mineral wool is to utilize slag or clinker, through soaring stove heat melting after being mixed with coke and adjusting material, using high speed from
Staple shape inorfil made of the techniques such as heart method or blowing process, then using processes systems such as machine-shaping, solidification and cuttings
At mineral wool product.Mineral wool production main fuel be coke, production one ton of mineral wool product take around consumption coke 250kg with
On.Furnace cupola produces the high energy consumption of mineral wool and pollution is big due to the limitation of technique itself and equipment.It is produced using molten state slag
On the one hand mineral wool takes full advantage of the sensible heat resource of molten state slag, on the other hand also steel slag resource " turns waste into wealth ", realizes
The zero-emission of slag.In addition, also reduce the production cost of mineral wool, the further genralrlization application of mineral wool product has huge
Economic benefit, social benefit and environmental benefit.
Through retrieval, also has more disclosure about the scheme for producing mineral wool using molten state clinker.Such as Chinese patent application
Numbers 201410239791.3, the applying date is on May 30th, 2014, and invention and created name is：It is a kind of to utilize high temperature blast furnace slag and height
The method of warm power plant's slag production mineral wool, this application by smelting iron and steel blast furnace high-temperature liquid state blast furnace slag and come from power plant
High-temperature liquid state power plant slag be placed in smelting furnace, in a furnace heating, it is quenched after, reach ingredient needed for mineral wool product and high speed from
Melt temperature needed for scheming>1400 DEG C, then high-temperature fusant enters back into high speed centrifugation and mineral wool fiber is made at cotton machine.This application
Case is by directly utilizing high-temperature liquid state blast furnace slag and high-temperature liquid state power plant slag so that high-temperature liquid state blast furnace slag and power plant in steel plant
The sensible heat of slag is utilized, and saves the energy expenditure of mineral wool production technology, also fully utilizes slag resource in steel plant.
Chinese Patent Application No. 201510250252.4, the applying date are on May 15th, 2015, and invention and created name is：One
The melting method of kind liquid blast furnace production mineral wool；This application adds acid additives progress in liquid blast furnace slag ladle
Quenched, the slag ladle for filling liquid blast furnace just heats under the electrodes, stirring of inert gas is blown in slag ladle bottom, then by liquid
Blast furnace slag is poured into electric furnace, there is the liquid blast furnace of quenched good twice slag ladle, continuous heating heat preservation in electric furnace；Finally open
Stove is slagged tap, and clinker is continuously sent to glass wool making machine and is processed into mineral wool.This application is relative to traditional furnace cupola and the high energy of kiln
Consumption, the sensible heat of liquid blast furnace are utilized effectively, and blast furnace ironmaking is made effectively to be combined with the production technology of mineral wool.
Above-mentioned application case be can yet be regarded as a kind of good scheme that mineral wool is produced using molten state slag, but above-mentioned application case
More focus has been placed on the higher blast furnace slag of recycling degree, and has been the sensible heat resource profit in molten state blast furnace slag
It uses, is not particularly suited for containing (Fe at presentnO) it is up to 15%~30% slag difficult to deal with.Since the component of blast furnace slag limits
System so that above-mentioned application case carries out slag quenched process, it is necessary to additional addition electric heater unit carries out heat supplement, and
And there is no the specific method for proposing to recycle for metals resources in slag component in above-mentioned application case, the resource of slag can not be solved
Change problem realizes the high value added utilization of slag.
Invention content
1. technical problems to be solved by the inivention
The present invention recycles existing insufficient for current molten state slag, provides and a kind of is melted early period using converter
The method that state slag produces mineral wool；The present invention adds silicon, al reducing agent in converter molten state early period slag, to solve in slag
The recycling of metals resources, and solve the benefit of heat using the chemical heat generated in the sensible heat and reduction reaction of molten state slag
It gives；Contain SiO on a small quantity by addition2、Al2O3Substance is finely adjusted slag component, and mineral wool directly is made in slag, realizes
The high value added utilization of tailings.While slag is turned waste into wealth, also reduces the production cost of mineral wool, improves iron and steel enterprise
Comprehensive benefit, but also can reduce environmental pollution, the benign cycle of the ecosystem is maintained, realizes society, economy and environment
Win-win.
2. technical solution
In order to achieve the above objectives, technical solution provided by the invention is：
A kind of method producing mineral wool using converter molten state early period slag of the present invention, step are：By converter early period
Molten state slag is poured into smelting furnace, and reducing agent and modification agent are added in toppling process, restore quenched；It is agitated mixed
After standing 0.5~1.5 hour after even, slag of the temperature between 1380 DEG C~1430 DEG C is sent to cotton equipment processed and is processed into mine
Cotton, remaining solid-state bloom return in converter.
Further, the raw material for producing mineral wool includes the converter molten state early period steel that mass percent is 70%~90%
Slag, 5%~10% reducing agent and 5%~20% modification agent.
Further, the converter molten state early period slag include following mass percent component CaO 30~
50%, SiO215~30%, FeO 10~30%, MgO 2~10%, Al2O31~5%.
Further, the converter molten state early period slag is the deslagging that the double slags of converter stay slag method, and temperature exists
Between 1350 DEG C~1500 DEG C, basicity of slag is between 1.0~2.0.
Further, the reducing agent is made of the mixing of one or both of ferrosilicon, aluminum shot, the granularity of reducing agent
For 5~50mm.
Further, the modification agent is to contain SiO2、Al2O3One or more mixing composition in substance, modification
The granularity of agent is 5~20mm.
Further, described to contain SiO2、Al2O3Substance is cullet, clay, flyash or red mud.
Further, add reducing agent and modification agent restore it is quenched after in slag FeO content 5% hereinafter,
Acidity coefficient (SiO2+Al2O3)/(CaO+MgO) it is 1.1~1.6.
Further, the smelting furnace number is that each converter is equipped with 2~5.
Further, the smelting furnace is improved slag ladle, and the shell of smelting furnace is steel plate, and inner wall is fire resistant heat preserving stove
Lining.
3. advantageous effect
Using technical solution provided by the invention, compared with existing known technology, there is following remarkable result：
(1) of the invention " a method of producing mineral wool using converter molten state early period slag ", from resource utilization degree
Lower slag is started with, and the efficient Utilizing question for molten state low alkalinity slag early period that converter smelting is toppled over is solved.In abundant profit
While with metallurgical slag thermal resource, recycled metals resources, realized the high value added utilization of tailings, by slag change give up into
Treasured reduces the production cost of mineral wool, improves iron and steel enterprise's comprehensive benefit, but also can reduce environmental pollution, and maintains ecosystem
The win-win of society, economy and environment is realized in the benign cycle of system；
(2) of the invention " a method of producing mineral wool using converter molten state early period slag ", technological process is simple, through also
The former quenched ingredient and temperature requirement that can be very good to meet mineral wool production, and by the cooperation of modification agent, acidity can be expanded
The mineral wool glassy state of the quenched range of coefficient, preparation is good, and at fine rate height, acidity coefficient adjustable extent is wide, can meet various
The market demand of change；
(3) of the invention " a method of producing mineral wool using converter molten state early period slag ", using in ferrosilicon, aluminum shot
One or two are used as reducing agent, silicon, aluminium to be reacted for silicon thermal response, thermit reaction, the adjoint a large amount of heat of meeting with ferriferous oxide
It generates, the heat supply for entirely restoring quenched process can be met；Simultaneously using the ferriferous oxide in silicon, aluminium reducing slag, temperature
At 1350 DEG C or more, reduction rate can reach 98% or more；And the product that silicon, aluminium are reacted with ferriferous oxide is SiO2、Al2O3,
While reducing modification agent addition, the product for restoring generation helps to improve the acidity of melt, but also slag composition
Homogenization is more smooth；
(4) of the invention " a method of producing mineral wool using converter molten state early period slag ", stay slag using the double slags of converter
One deslagging of method, temperature is between 1350 DEG C~1500 DEG C, and for basicity of slag between 1.0~2.0, the converter basicity of slag in the period is low
And stable components, contribute to the production of mineral wool；
(5) present invention " a method of using converter molten state early period slag produce mineral wool ", 2 are equipped with for each converter~
5 smelting furnaces can be very good the discontinuity for solving converter deslagging and mineral wool continuous production under the cooperation of 2~5 smelting furnaces
Contradiction.
Description of the drawings
Fig. 1 is process flow diagram of the present invention using converter molten state early period slag production mineral wool.
Specific implementation mode
To further appreciate that present disclosure, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.
A kind of method producing mineral wool using converter molten state early period slag of the present invention, raw material is mainly by following quality hundred
The group than meter is divided to be grouped as：70%~90% converter molten state early period slag, 5%~10% reducing agent and 5%~20%
Modification agent.The converter molten state early period slag is the deslagging that the double slags of converter stay slag method, i.e., by upper stove terminal slag
Part or all is stayed in stove, then in blowing 3~5 minutes or so, the slag that the when of falling stove pours out for the first time.Slag temperature at this time
Degree is between 1350 DEG C~1500 DEG C, and for basicity of slag between 1.0~2.0, the mass percent of key component is as follows：CaO is 30
~50%, SiO2For 15~30%, FeO be 10~30%, MgO it is 2~10%, Al2O3It is 1~5%.Compared to converter finishing slag
For, converter molten state early period slag temperature and ingredient are all more stable so that the reduction of ferriferous oxide and the hot tune of tailings
Matter is more prone to carry out, and contributes to the production of mineral wool.
The step of carrying out mineral wool production using converter molten state early period slag is as follows：
During converter molten state early period slag is poured into smelting furnace, going back for above-mentioned mass percent is added into smelting furnace
Former agent and modification agent restore quenched.For meet mineral wool production ingredient and temperature requirement, reduction it is quenched after slag in FeO
Content 5% hereinafter, acidity coefficient (SiO2+Al2O3)/(CaO+MgO)=1.1~1.6, the symbology ingredient of oxide
In various oxides mass percent.It is small that 0.5~1.5 is stood after stirring and evenly mixing the ingredient reached needed for mineral wool product
When, keep the ingredient of slag uniform, realizes the separation of slag and metal, finally the slag by temperature between 1380 DEG C~1430 DEG C
It send to cotton equipment processed and is processed into mineral wool, remaining solid-state bloom returns in converter.
The reducing agent of the present invention is made of the mixing of one or both of ferrosilicon, aluminum shot, and granularity is 5~50mm.Use silicon
Iron or aluminum shot are as reducing agent, although the cost of reducing agent itself is higher, silicon, aluminium react for silicon heat instead with ferriferous oxide
It answers, thermit reaction, can be generated with a large amount of heat；Silicon, aluminium reacted with ferriferous oxide release chemical reaction heat can meet it is whole
The heat of a flow is fed, and can be calculated by the heat budget of whole flow process, and heat income is mainly silicon heat, aluminium
The heat of heat and molten state slag；The expenditure heat of slag heating after modification agent is mainly added in heat expenditure, and slag pours into slag
Slag heat dissipation etc. when tank in the heat absorption of slag ladle wall surface and reaction process, heat budget in whole process calculates as follows：
(1) during with ferrosilicon, aluminium fusion reduction reaction occurs for slag, the chemical reaction being related to is as follows：
2 (FeO)+Si=(SiO2)+2Fe
3 (FeO)+2Al=(Al2O3)+3Fe
The heat that ferrosilicon process, aluminothermic process generate can use formula：It calculates,
Wherein ∑ M is the sum of the molal weight of original charging calculated by chemical reaction quantitative relation.
For n mol substances, under constant-pressure conditions, by temperature T1It is increased to T2Process institute calorific requirement can be calculated by following formula：
(2) reduction reaction heat is taken in：
Si reduction heat is taken in：
Aluminium reducing heat is taken in：
(3) reduction reaction heat is paid：
Data checks in：The specific heat of converter slag is 1.25kJ/kg. DEG C, and molten steel specific heat is 0.85kJ/kg. DEG C, modification agent
Specific heat presses 0.7kJ/kg. DEG C.
So using silicon, aluminium as reducing agent, by adjusting the ratio of silicon, aluminium, the heat of generation can make slag heat up
100 DEG C~300 DEG C or so, the heat supply of whole flow process can be met completely.
Simultaneously using the ferriferous oxide in silicon, aluminium reducing slag, for temperature at 1350 DEG C or more, reduction rate can reach 98%
More than.And the product that silicon, aluminium are reacted with ferriferous oxide is SiO2、Al2O3, while reducing modification agent addition, reduction generates
Product help to improve the acidity of melt, but also the homogenization of slag composition is more smooth；The granularity of reducing agent is controlled
In 5~50mm, then contribute to the addition of reducing agent and the progress of reduction reaction.
The modification agent of the present invention is to contain SiO2、Al2O3In substance one or more mixing composition, granularity be 5~
20mm contains SiO2、Al2O3Cullet, clay, flyash or red mud specifically may be used in substance.The main mesh that modification agent is added
Be to adjust the acidity coefficient of mineral wool, the basicity of converter molten state early period slag is between 1.0~2.0, in order to meet acid
The requirement for spending coefficient needs that acidic oxide is added, and the present invention mainly utilizes SiO2、Al2O3To adjust.What the present invention used contains
There is SiO2、Al2O3Substance such as cullet, clay, flyash or red mud have many advantages, such as that price is low, applicability is good, easy acquisition, and
Steel plant can be cut down to a certain extent and contain SiO2、Al2O3Solid waste.The granularity control of modification agent 5~
20mm, mainly inventor are summarized in production practice, when modification agent granularity is more than 20mm, are unfavorable for the thawing of modification agent, with
And ingredient is uniform, to the hot quenched unfavorable of mineral wool, modification agent granularity is less than 5mm, and modification agent can be caused to be not easy to be added, together
When will produce dust pollution.
Since 100 tons of converters about each hour goes out slag twice, slag tap every time about 6~8 tons, an annual output
For the production line of 80,000 tons of mineral wool, 9 tons or so of materials per hour, so reach mineral wool production line per tank slag makes for 0.5 hour
With, after 0.5 hour, the slag of next tank need to restore it is quenched finish, therefore the present invention is each converter be equipped with 2~5 smelting furnaces, one
The mineral wool production line that annual output is 80,000 tons, to solve the contradiction of the discontinuity and mineral wool continuous production of converter deslagging.Smelting furnace
Using improved slag ladle, shell is steel plate, and inner wall is that fire resistant heat preserving furnace lining also can while extending smelting furnace service life
Enough reduce the production cost of mineral wool.
The present invention realizes the high value added utilization of tailings, and reducing agent is used as using one or both of ferrosilicon, aluminum shot,
It is fed using reduction reaction heat to meet the heat of whole flow process, can recycle the metal in slag to greatest extent, low using price,
The steel mill's solid-state castoff easily obtained improves iron and steel enterprise's comprehensive benefit as modification agent；And technological process is simple, through reduction
The quenched ingredient and temperature requirement that can be very good to meet mineral wool production, and by the cooperation of modification agent, acidity system can be expanded
The mineral wool glassy state of several quenched ranges, preparation is good, and at fine rate height, acidity coefficient adjustable extent is wide, can meet diversification
The market demand.
Embodiment 1
The present embodiment " a method of producing mineral wool using converter molten state early period slag ", raw material forms quality percentage
Than for：80% converter molten state early period slag, 15% reducing agent, 5% modification agent.Converter molten state early period slag includes as follows
The component of mass percent：CaO 37%, SiO229%, FeO 25%, MgO 4%, Al2O33%.Reducing agent is ferrosilicon, aluminium
The mixture of grain, granularity are 10~30mm.Modification agent is cullet, and granularity is 5~20mm.
In conjunction with Fig. 1, the present embodiment production mineral wool the step of be：
(1) the double slags of converter that basicity of slag is 1.3 are stayed a deslagging of slag method, are poured into smelting furnace by temperature at 1400 DEG C or so
In, each converter is equipped with 3 smelting furnaces, and slag adds the mixture of reducing agent ferrosilicon, aluminum shot, and modification during being placed in smelting furnace
The reduction of agent cullet is quenched；
(2) it at transport to agitating device, stirs and evenly mixs, 0.5 hour is stood after reaching the ingredient needed for mineral wool product；
(3) by temperature at 1420 DEG C or so, the slag for meeting cotton ingredient processed send to cotton equipment processed and is processed into raw cotton；
(4) remaining solid-state bloom returns in converter, and mineral wool board, mineral wool felt, mineral wool pipe are obtained after raw cotton machine-shaping
Or other mineral wool products.The testing result of raw cotton：Acidity coefficient is close to 1.6.
Embodiment 2
The present embodiment " a method of producing mineral wool using converter molten state early period slag ", raw material forms quality percentage
Than for：80% converter molten state early period slag, 10% reducing agent, 10% modification agent, converter molten state early period slag include such as
The component of lower mass percent：CaO 45%, SiO225%, FeO 20%, MgO 5%, Al2O32.5%.Reducing agent is silicon
Iron, granularity are 10~30mm.Modification agent is clay, and granularity is 5~20mm.
In conjunction with Fig. 1, the present embodiment production mineral wool the step of be：
(1) the double slags of converter that basicity of slag is 1.8 are stayed a deslagging of slag method, are poured into smelting furnace by temperature at 1420 DEG C or so
In, each converter is equipped with 4 smelting furnaces, and smelting furnace is improved slag ladle, and shell is steel plate, and inner wall is fire resistant heat preserving furnace lining.Slag
Reducing agent ferrosilicon is added during being placed in smelting furnace and the reduction of modification agent clay is quenched；
(2) it at transport to agitating device, stirs and evenly mixs, 1 hour is stood after reaching the ingredient needed for mineral wool product；
(3) by temperature at 1430 DEG C or so, the slag for meeting cotton ingredient processed send to cotton equipment processed and is processed into raw cotton；
(4) remaining solid-state bloom returns in converter, and mineral wool board, mineral wool felt, mineral wool pipe are obtained after raw cotton machine-shaping
Or other mineral wool products.The testing result of raw cotton：Acidity coefficient is close to 1.7.
Embodiment 3
The present embodiment " a method of producing mineral wool using converter molten state early period slag ", raw material forms quality percentage
Than for：85% converter molten state early period slag, 9% reducing agent, 6% modification agent, converter molten state early period slag include as follows
The component of mass percent：CaO 41%, SiO229%, FeO 18%, MgO 6%, Al2O33%.Reducing agent is aluminum shot, grain
Degree is 10~30mm.Modification agent is flyash, and granularity is 5~20mm.
In conjunction with Fig. 1, the present embodiment production mineral wool the step of be：
(1) the double slags of converter that basicity of slag is 1.4 are stayed a deslagging of slag method, are poured into smelting furnace by temperature at 1450 DEG C or so
In, each converter is equipped with 5 smelting furnaces, and slag adds reducing agent aluminum shot during being placed in smelting furnace and the reduction of modification agent flyash is adjusted
Matter；
(2) it at transport to agitating device, stirs and evenly mixs, 1.5 hours is stood after reaching the ingredient needed for mineral wool product；
(3) by temperature at 1400 DEG C or so, the slag for meeting cotton ingredient processed send to cotton equipment processed and is processed into raw cotton；
(4) remaining solid-state bloom returns in converter, and mineral wool board, mineral wool felt, mineral wool pipe are obtained after raw cotton machine-shaping
Or other mineral wool products.The testing result of raw cotton：Acidity coefficient is close to 1.4.
Embodiment 4
The present embodiment " a method of producing mineral wool using converter molten state early period slag ", substantially with embodiment 1, no
It is with place：Modification agent is the mixture of cullet and clay in the present embodiment.
Embodiment 5
The present embodiment " a method of producing mineral wool using converter molten state early period slag ", substantially with embodiment 1, no
It is with place：Modification agent is the mixture of cullet, clay and flyash in the present embodiment.
Embodiment 6
The present embodiment " a method of producing mineral wool using converter molten state early period slag ", substantially with embodiment 1, no
It is with place：Modification agent is the mixture of cullet, clay and red mud in the present embodiment.
A kind of method producing mineral wool using converter molten state early period slag described in Examples 1 to 6, has given full play to molten
The double dominant for melting state slag itself " slag " and " heat " is adding suitable reducing agent, modification agent, will be remaining after recycling valuable element
Slag is directly prepared into high added value mineral wool, realizes comprehensively recyling for molten state slag, and the discharge for not only solving slag is asked
Topic, can also reduce production cost, avoid the wasting of resources, have preferable economy and environmental benefit.
Schematically the present invention and embodiments thereof are described above, description is not limiting, institute in attached drawing
What is shown is also one of embodiments of the present invention, and actual structure is not limited to this.So if the common skill of this field
Art personnel are enlightened by it, without departing from the spirit of the invention, are not inventively designed and the technical solution
Similar frame mode and embodiment, are within the scope of protection of the invention.
Claims (6)
1. a kind of method producing mineral wool using converter molten state early period slag, step are：By converter molten state early period slag
It is poured into smelting furnace, and adds reducing agent and modification agent in toppling process, restore quenched；It is stood after agitated mixing
After 0.5~1.5 hour, slag of the temperature between 1380 DEG C~1430 DEG C is sent to cotton equipment processed and is processed into mineral wool, it is remaining
Solid-state bloom returns in converter；
The raw material of production mineral wool includes the converter molten state early period slag that mass percent is 70%~90%, 5%~10%
Reducing agent and 5%~20% modification agent；
The converter molten state early period slag includes the component of following mass percent：CaO 30~50%, SiO215~
30%, FeO 10~30%, MgO 2~10%, Al2O31~5%；
The reducing agent is made of the mixing of one or both of ferrosilicon, aluminum shot, and the granularity of reducing agent is 5~50mm.
2. a kind of method producing mineral wool using converter molten state early period slag according to claim 1, it is characterised in that：
The converter molten state early period slag is the deslagging that the double slags of converter stay slag method, and temperature is between 1350 DEG C~1500 DEG C, slag
Basicity is between 1.0~2.0.
3. a kind of method producing mineral wool using converter molten state early period slag according to claim 2, it is characterised in that：
The modification agent is one kind in cullet, clay, flyash, red mud, or by cullet, clay, flyash, red mud
The granularity of a variety of mixing compositions, modification agent is 5~20mm.
4. a kind of method producing mineral wool using converter molten state early period slag according to claim 2, it is characterised in that：
Addition reducing agent and modification agent restore it is quenched after in slag FeO content 5% hereinafter, acidity coefficient (SiO2+Al2O3)/
(CaO+MgO) it is 1.1~1.6.
5. a kind of method producing mineral wool using converter molten state early period slag according to claim 4, it is characterised in that：
The smelting furnace number is that each converter is equipped with 2~5.
6. a kind of method producing mineral wool using converter molten state early period slag according to claim 5, it is characterised in that：
The smelting furnace is improved slag ladle, and the shell of smelting furnace is steel plate, and inner wall is fire resistant heat preserving furnace lining.
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| CN112374764A (en) * | 2020-11-26 | 2021-02-19 | 中冶华天南京工程技术有限公司 | Method for preparing mineral wool by thermal state tempering of molten steel slag |
| CN112960917B (en) * | 2021-01-28 | 2022-11-08 | 天津水泥工业设计研究院有限公司 | Method for on-line adjusting slagging alkalinity of smelting reduction furnace by using construction waste |
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