CN103979787B - A kind of method utilizing high-calcium fly ass to prepare mineral wool - Google Patents

A kind of method utilizing high-calcium fly ass to prepare mineral wool Download PDF

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Publication number
CN103979787B
CN103979787B CN201410209959.6A CN201410209959A CN103979787B CN 103979787 B CN103979787 B CN 103979787B CN 201410209959 A CN201410209959 A CN 201410209959A CN 103979787 B CN103979787 B CN 103979787B
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deironing
carbon
mineral wool
mineral
fibroblast
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CN103979787A (en
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张作泰
王习东
刘丽丽
郑凯
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Peking University
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Peking University
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00Technologies relating to the processing of minerals
    • Y02P40/50Glass production, e.g. reusing waste heat during processing or shaping

Abstract

The present invention relates to a kind of method utilizing high-calcium fly ass to prepare mineral wool, described method comprises the steps: A, batching; B, pelletizing; C, fusing, deironing de-carbon; D, fibroblast.By selecting suitable proportion material and amount ratio, and control the processing parameter of each process, and obtain functional, the uniform mineral wool of diameter Distribution, through detecting, the various fibre product excellent propertys obtained by the mineral wool that such as this method obtains, meet many application indexes completely, have broad application prospects and industrialization potential in energy-saving and emission-reduction, environmental area waste recycling field.

Description

A kind of method utilizing high-calcium fly ass to prepare mineral wool
Technical field
The present invention relates to a kind of utilization of waste material method of coal burning residue, more specifically, the present invention relates to a kind of method utilizing high-calcium fly ass to prepare mineral wool, belong to reprocessing utilization and the mineral wool production field of solid waste.
Background technology
Flyash is a kind of solid waste produced in coal-burning power plant's production process, and its output accounts for the 5-20% of coal-fired total amount, and therefore its generation is huge.
Flyash can be divided into Class F fly ash and high-calcium fly ass, wherein Class F fly ash is the flyash that the calcium oxide content that emits as fuel using bituminous coal is very low, and high-calcium fly ass refers to fuel-burning power plant, blast furnace Zhi Qi factory carries out burning the rear a kind of flyash obtained of utilization, wherein (SiO using brown coal, sub-bituminous coal as fuel 2+ Al 2o 3+ Fe 2o 3) mass percentage>=50%, CaO mass percentage>=10%, the physical aspect major part of these materials is hydraulicity crystalline mineral, and has certain lateral reactivity.
And along with the fast development of China's power industry, the output of high-calcium fly ass is huge, according to incompletely statistics, the high-calcium fly ass output that annual China produces is up to tens million of ton, but then, the process means of high-calcium fly ass are comparatively deficient again, thus cause major part to carry out outdoor storage with the form of piling up, this not only occupies valuable land resources, and grave danger is caused to environment, such as produce airborne dust, polluted-water etc., become high-calcium fly ass generation area and had to face and need one of the subject matter and a difficult problem of solution badly.
For a long time, the comprehensive utilization of high-calcium fly ass is all an important topic of field of environment protection, and till now, high-calcium fly ass still lacks the utilization of high added value.
Just because of the scarcity of high added value process means and the low of recycling degree, numerous researchers and manufacturer have carried out positive research, and have developed multiple use high-calcium fly ass to prepare the method for various goods:
CN1012951A discloses a kind of method that high-calcium fly ass produces cement, and described method, by when grinding fine cement grog and high-calcium fly ass, mixes latent hydraulicity material and the volcano material of 5-30%.
CN1052626A discloses the method using high-calcium fly ass to prepare micropore corebrick, described brick is the hollow casing be made up of high-calcium fly ass, pozzolana particle, saturated wet saw end and binding agent, and in it is hollow, be filled with the core material be made up of pitch, vegetation chip or plastic foam fragment.Its making method is, by high-calcium fly ass, pozzolana particle, saturated wet saw end, binding agent and water carry out mixing and stirring; Vegetation chip or plastic foam fragment and pitch are heated rear extrusion respectively shaping; Shaping by vibrating in above-mentioned compound feeding mold, shaping rear taking-up seasoning.
CN103193434A discloses one and uses high-calcium fly ass prepares low-carbon (LC) and inhales the concrete method of carbon, and described low-carbon (LC) and suction carbon concrete include cement, slag powders, high-calcium fly ass or adding calcium fly ash.
CN103159416A discloses a kind of build concrete gelling material, described material comprises high-calcium fly ass 1000-4000 part, mixing water 100-1600 part, nano clay 10-30 part, borax 5-80 part, water reducer 10-80 part, thus efficiently solves the problems such as high-calcium fly ass contaminate environment, harm ecology, waste resource.
CN103121804A discloses a kind of method preparing clay hardening agent, and described solidifying agent comprises high-calcium fly ass 50-60 part, terra alba 32-41 part, sodium sulfate 7-12 part, smart grey 10-15 part.
CN102964095A discloses a kind of preparation method of air-entrained concrete building block, and described building block comprises high-calcium fly ass 60-75 part, ordinary fly ash 4-15 part, gypsum 5-8 part, lime 13-16 part, aluminium powder 0.07-0.1 part, water 43-46 part.
CN102826815A discloses a kind of high-calcium flyash fixed sealing material and preparation method thereof, described fixed sealing material take high-calcium fly ass as main raw material, with sodium hydroxide and sodium silicate for composite chemical admixture, and thermal treatment desulfurated plaster or thermal activation mud can be added.This fixed sealing material has good performance, can substitute ordinary Portland cement within the specific limits and be used in Practical Project.
CN102746850A discloses a kind of flyash stablizer for administering heavy metal contamination and preparation method, described stablizer with lime and high-calcium fly ass for raw material, adopt melting-hydro-thermal synthesis process, obtain described flyash stablizer, this stablizer has good heavy metal stabilizing.
In addition, also have many prior aries by high-calcium fly ass for the preparation of many materials such as biomass molding fuel, sewage-treating agent, road engineering mortar material, mud exciting agents, thus widened the producing level of high-calcium fly ass to a certain extent.
But up to now, not yet utilize coal ash for manufacturing for mineral wool, be especially applicable to the technology report in the building thermal insulation material field such as energy-conservation, heat insulation, fire-resistant.
Mineral wool is a kind of energy-saving and heat-insulating material of excellent property, be widely used in building energy conservation, the fields such as piping insulation, all the time all using block blast furnace slag as main raw materials for production, block blast furnace slag can consume a large amount of coke in melting process, waste energy and contaminate environment, also increase the production cost of mineral wool simultaneously.Along with China is to the pay attention to day by day of building energy conservation, how the production cost of mineral wool, by boundless, is reduced to building trade acceptable level extremely urgent by the market requirement prospect of mineral wool.
Therefore, under the present situation of China, the widespread use of mineral wool goods, is of great immediate significance and social effect to energy-saving and emission-reduction.
Further, use the huge high-calcium fly ass of China output to prepare mineral wool, on the one hand can maximum restriction utilize high-calcium fly ass, realize its high value added utilization degree.On the other hand, resource, energy circulation and the innovation item in regeneration field especially, to raising waste utilization efficiency, make full use of the discarded energy, promote the economy and society of China, the harmonious development of man and nature, realize resources economy, to jumping of recycling economy, there is extremely profound significance.All these, the basic place all becoming research power of the present invention He be accomplished.
Summary of the invention
For current demand as above and technical development, the present inventor, through a large amount of further investigations, after having paid sufficient creative work, has developed a kind of method utilizing high-calcium fly ass to prepare mineral wool, thus has completed the present invention.
Specifically, the present invention relates to a kind of method utilizing high-calcium fly ass to prepare mineral wool, described method comprises the steps: A, batching; B, pelletizing; C, fusing, deironing de-carbon; D, fibroblast.
More specifically, the invention provides a kind of method utilizing high-calcium fly ass to prepare mineral wool, described method comprises the steps:
A, batching
Take following component (1)-(4) respectively:
(1) high-calcium fly ass;
(2) SiO 2or containing SiO 2mineral;
(3) Al 2o 3or containing Al 2o 3mineral;
(4) MgO or containing MgO mineral; With optional
(5) CaO or containing CaO mineral, carries out proportioning, then mixes, pulverize, prepared burden;
B, pelletizing
Batching is carried out pelletizing, obtains spherolite;
C, fusing, deironing de-carbon
By spherolite fusing, deironing de-carbon, obtain high-temperature fusion liquid;
D, fibroblast
High-temperature fusion liquid blown silk or gets rid of a fibroblast, obtaining the finished product mineral wool.
Prepare in the method for mineral wool at the high-calcium fly ass that utilizes of the present invention, in described steps A, component (1)-(5) are carried out each amounts of components ratio during proportioning, the SiO in final gained mineral wool should be made 2mass percentage is 28-42%, Al 2o 3mass percentage is 15-30%, CaO mass percentage be 20-35% and MgO mass percentage is 3-8%.
Specifically:
Wherein, the SiO in final gained mineral wool should be made 2mass percentage is 28-42%, such as, can be 28%, 30%, 32%, 34%, 36%, 38%, 40% or 42%.
Wherein, the Al in final gained mineral wool should be made 2o 3mass percentage is 15-30%, such as, can be 15%, 17%, 19%, 21%, 23%, 25%, 27%, 29% or 30%.
Wherein, the CaO mass percentage in final gained mineral wool should be made to be 20-35%, such as, to can be 20%, 22%, 24%, 26%, 27%, 29%, 31%, 33% or 35%.
Wherein, the MgO mass percentage in final gained mineral wool should be made to be 3-8%, such as, to can be 3%, 4%, 5%, 6%, 7% or 8%.
The determination of above-mentioned consumption proportion, can easily determine to those skilled in the art, such as can according to the content of Si, Al, Ca and Mg in flyash, thus determine the consumption of added component (1)-(5), thus each main ingredient in final mineral wool is made to be positioned at above-mentioned scope.
It is significant to note that: in the mineral wool of final gained, except above-mentioned SiO 2, Al 2o 3, outside CaO and MgO, also containing other impurity component, as Fe oxide compound, S element, other metal oxide (as Ba oxide compound, Sr oxide compound, Ti oxide compound, V oxide compound, monovalent metal oxide etc.) etc.Meanwhile, SiO 2, Al 2o 3, CaO, MgO and all impurity components total mass percentage composition be 100%.
Wherein, described containing SiO 2mineral such as can be any one or multiple in quartz, cullet, iron tailings etc.
Wherein, described containing Al 2o 3mineral such as can be any one or multiple in bauxitic clay, coal gangue etc.
Wherein, the described MgO mineral that contain such as can be magnesite.
Wherein, the described CaO mineral that contain such as can be Wingdale.
Prepare in the method for mineral wool at the high-calcium fly ass that utilizes of the present invention, in stepb, batching is carried out pelletizing, obtains spherolite.Add organic binder bond when granulation, described organic binder bond is the 1-5% of batching quality, such as, be 1%, 2%, 3%, 4% or 5%.
Wherein, described organic binder bond is conventional binders conventional in granulation field, such as, be polyvinyl alcohol or other similar macromole binding agent.
Wherein, the diameter of gained spherolite is 3-6cm, such as, be 3cm, 4cm, 5cm or 6cm.
The device that this granulation operations uses is the conventional equipment in granulation field, and this is no longer going to repeat them.
Prepare in the method for mineral wool at the high-calcium fly ass that utilizes of the present invention, melt in step C, deironing carbon removing device is used during the operation of deironing de-carbon, described deironing carbon removing device comprises fusion tank, described fusion tank open top, the bottom land of described fusion tank is obliquely installed, the medium position of described bottom land is provided with discharge port, the extreme lower position of described bottom land is provided with the outlet of iron liquid, three are provided with for heating the melt electrode of material in described fusion tank in described fusion tank, 60-120 ° of angle is mutually between three described melt electrodes, such as can be 60 °, 80 °, 100 ° or 120 °.
Carbon mass content in gained fused solution after the deironing de-carbon operation of this step C is less than 0.1%, weight of iron content is less than 0.5%.If this content requirement can not be reached, then can repeat the operation of this step, until carbon mass content in gained fused solution and weight of iron content meet These parameters requirement.
In described deironing carbon removing device, as a kind of optimal technical scheme, be preferably mutually 80 ° of angles or 120 ° of angles between three described melt electrodes.
In described deironing carbon removing device, as a kind of optimal technical scheme, in described discharge port, be provided with an anti-condensation electrode preventing fused solution from solidifying.
In described deironing carbon removing device, as a kind of optimal technical scheme, in described iron liquid outlet, be provided with an anti-condensation electrode preventing iron liquid from solidifying.
In described deironing carbon removing device, as a kind of optimal technical scheme, described fusion tank comprises interior cell body and outer cell body, is provided with cooling sandwith layer between described interior cell body and outer cell body, described cooling sandwith layer connects cooling water source by pipeline, and described pipeline is provided with stopping valve.
In described deironing carbon removing device, as a kind of optimal technical scheme, some lateral arrangement are provided with and the aeration tube be made up of stupalith in described fusion tank, described aeration tube offers some ventilating pits, described aeration tube runs through described fusion tank and described aeration tube one end is closed, and the other end connects compressed air source.
Wherein, for a person skilled in the art, the quantity of aeration tube and quantity and ventilating pit reasonably can be determined according to operational requirements, molten mass can be carried out suitable or farthest fully to stir.
In described deironing carbon removing device, as a kind of optimal technical scheme, described aeration tube is arranged near described bottom land, thus has maximum aeration efficiency.
In described deironing apparatus, unless otherwise prescribed, from start to finish, term " fused solution " comprises aluminum oxide, silicon oxide after referring to spherolite fusing, eliminates the liquid of ferric oxide and residual carbon, eliminate this fused solution after impurity to flow out from discharge port, can be used in operation subsequently.And remaining carbon in original flyash and ferric oxide react and generate gas and discharge in heat, the iron liquid of generation then exports discharge from iron liquid.
In described deironing carbon removing device, unless otherwise prescribed, from start to finish, term " molten mass " refers to the initial molten mixture containing iron liquid and fused solution, and along with the carrying out processed, slowly physical layering becomes described iron liquid and described fused solution.
When carrying out described deironing, de-carbon operation, the temperature of fusion tank controls between 1300-1600 DEG C, such as, can be 1300 DEG C, 1350 DEG C, 1400 DEG C, 1450 DEG C, 1500 DEG C, 1550 DEG C or 1600 DEG C.
Prepare in the method for mineral wool at the high-calcium fly ass that utilizes of the present invention, in step D, fibroblast temperature is 1350-1550 DEG C, such as, can be 1350 DEG C, 1400 DEG C, 1450 DEG C, 1500 DEG C or 1550 DEG C.
When blowing a thread fibroblast, winding-up wind speed >=200 meter per second.
When getting rid of a thread fibroblast, the rotating speed of tumbling machine is 6000-7200 rev/min, such as, be 6000 revs/min, 6200 revs/min, 6400 revs/min, 6600 revs/min, 6800 revs/min, 7000 revs/min or 7200 revs/min.
As mentioned above, the aforesaid operations step of the application of the invention and each processing parameter, high-calcium fly ass can be used to obtain the mineral wool of high added value, and the mineral wool of gained has good performance, can meet the embody rule index in multiple field.
In general, the present invention has following advantage and disadvantage:
1. achieve the high added value of high-calcium fly ass, high-efficiency comprehensive utilization, huge economic benefit and social value can be produced;
2. decrease solid waste total amount, protect environment, thus facilitate the harmonious development of economy, environment, achieve by the leap of society of resources recycling to recycling economy.
3. the mineral wool of gained has excellent properties, achieves the high value added utilization of high-calcium fly ass, protects environment simultaneously, has wide industrial applications prospect.
Accompanying drawing explanation
Fig. 1 is the structural representation of the deironing carbon removing device one used in step C of the present invention;
Fig. 2 is another kind of structural representation of the deironing carbon removing device two used in step C of the present invention.
Wherein, in fig. 1 and 2, each number designation refers to following concrete meaning, element or parts respectively.
In figure: 1, outer cell body, 2, interior cell body, 3, cooling sandwith layer, 4, discharge port, 5, the outlet of iron liquid, 6, melt electrode, 7, stopping valve, 8, anti-condensation electrode, 9, aeration tube.
Fig. 3 is the electron micrograph of the embodiment of the present invention 1 gained mineral wool.
Embodiment
Below by specific embodiment, the present invention is described in detail; but the purposes of these exemplary embodiments and object are only used for exemplifying the present invention; not any type of any restriction is formed to real protection scope of the present invention, more non-protection scope of the present invention is confined to this.
deironing carbon removing device one
As shown in Figure 1, deironing carbon removing device of the present invention, comprise fusion tank, fusion tank open top, the bottom land of fusion tank is obliquely installed, the medium position of bottom land is provided with discharge port 4, the extreme lower position of bottom land is provided with iron liquid outlet 5, three melt electrodes 6 for material in heating and melting groove are provided with in fusion tank, 60 ° of angles are mutually between three melt electrodes 6, be provided with the anti-condensation electrode 8 that prevents iron liquid condensing in iron liquid outlet 5, in fused solution discharge port 4, also can be provided with the Anti-solidification electrode (attached not shown) preventing fused solution from solidifying.Certainly, there is no particular limitation for the type of heating of fusion tank, such as, can adopt high-frequency melting, and those skilled in the art can select as required and voluntarily.
Described fusion tank comprises interior cell body 2 and outer cell body 1, and be provided with cooling sandwith layer 3 between interior cell body 2 and outer cell body 1, cooling sandwith layer 3 connects cooling water source by pipeline, and pipeline is provided with stopping valve 7.
As everyone knows, by aluminum oxide, the ternary phase diagrams of silicon oxide and calcium oxide is known, fusing point can control to use between 1300-1600 DEG C, during use, the temperature of fusion tank controls between 1300-1600 DEG C, this is more than the fusing point of iron, after spherolite is added in interior cell body 2 by feeding device (not shown), three melt electrodes 6 are energized, along with the carrying out of energising, melt electrode 6 peripheral region slowly melts, and expand gradually, because formed molten mass itself has very high resistance, thus can by the current flow heats of self, at this moment can slowly on carry melt electrode 6, and rely on self electric current of molten mass to continue to heat the spherolite do not melted.In heat-processed, oxidation of impurities iron in spherolite and carbon generation reduction reaction, wherein carbon is converted into oxycarbide as carbonic acid gas or carbon monoxide discharge, iron oxides impurity is then melted and is formed iron liquid in interior cell body 2, and under self gravitation effect, iron liquid outlet 5 is pooled to along the inclination of bottom land, export 5 by iron liquid to discharge and carry out collecting or shaping further, being separated the high-quality fused solution obtained can be discharged by discharge port 4, can follow-uply be used for preparing high-performance mineral cotton.Wherein, the anti-condensation electrode (not shown) preventing fused solution from solidifying can be provided with in discharge port 4.
deironing carbon removing device two
As shown in Figure 2, a kind of deironing carbon removing device of the present invention, its structure is substantially identical with deironing carbon removing device one, its difference is: be also additionally provided with some lateral arrangement in fusion tank and the aeration tube 9 be made up of stupalith, the quantity of aeration tube 9, according to the volume settings of fusion tank, aeration tube 9 offers some ventilating pits, and aeration tube 9 runs through fusion tank and arranges near bottom land, aeration tube 9 one end is closed, and the other end connects compressed air source.
During use, when forming molten mass in interior cell body 2, high pressure gas can be used to form bubble and stir, make reaction more abundant, removal of impurities is more thorough.After removal of impurities, during discharge, open stopping valve 7, in cooling sandwith layer 3, add recirculated cooling water, recycle after reclaiming the heat of molten mass.
deironing de-carbon operates
The deironing carbon removing device shown in Fig. 1 is used to carry out deironing operation, wherein be mutually 60-120 ° of angle between three melt electrodes, keep the temperature of fusion tank in operating process between 1300-1600 DEG C, the fused solution that the purity obtained from discharge port improves is for subsequent step.
The deironing carbon removing device shown in Fig. 2 can also be used to carry out deironing operation, be wherein mutually 60-120 ° of angle between three melt electrodes, in operating process, keep the temperature of fusion tank between 1300-1600 DEG C.Between working life, use high pressure gas to carry out bubbling stirring by aeration tube, thus make reaction more abundant, complete, improve dust removal rate.The fused solution that the purity obtained from discharge port improves is for subsequent step.
Embodiment 1
A, batching
Take following component (1)-(5) respectively:
(1) CaO mass content is the high-calcium fly ass of 10%;
(2)SiO 2
(3)Al 2O 3
(4)MgO;
(5)CaO;
Said components is carried out proportioning, then mixes, pulverize, prepared burden, each amounts of components ratio wherein during proportioning, should make the SiO in final gained mineral wool 2mass percentage is 38%, Al 2o 3mass percentage is 18%, CaO mass percentage be 26% and MgO mass percentage be 6%, other is impurity component.
B, pelletizing
In the batching of steps A gained, add polyvinyl alcohol, wherein the quality of polyvinyl alcohol is 1% of batching quality, obtains the spherolite that diameter is 3cm after pelletizing.
C, fusing, deironing de-carbon
Being joined by spherolite in above-mentioned deironing carbon removing device one, is wherein 80 ° of angles between three melt electrodes, and energising melting, makes the temperature of fusion tank be between 1300-1600 DEG C, by spherolite fusing, deironing de-carbon, obtains high-temperature fusion liquid.This operation can carry out one or many, until carbon mass content is wherein less than 0.1%, weight of iron content is less than 0.5%.
D, fibroblast
Carried out blowing a fibroblast by the high-temperature fusion liquid of step C, wherein fibroblast temperature is 1400 DEG C, and winding-up wind speed is 200 meter per seconds, obtains the finished product mineral wool, called after KWM1.
Embodiment 2
A, batching
Take following component (1)-(5) respectively:
(1) CaO mass content is the high-calcium fly ass of 20%;
(2)SiO 2
(3)Al 2O 3
(4)MgO;
(5)CaO;
Said components is carried out proportioning, then mixes, pulverize, prepared burden, each amounts of components ratio wherein during proportioning, should make the SiO in final gained mineral wool 2mass percentage is 36%, Al 2o 3mass percentage is 26%, CaO mass percentage be 28% and MgO mass percentage be 4%, other is impurity component.
B, pelletizing
In the batching of steps A gained, add polyvinyl alcohol, wherein the quality of polyvinyl alcohol is 3% of batching quality, obtains the spherolite that diameter is 5cm after pelletizing.
C, fusing, deironing de-carbon
Being joined by spherolite in above-mentioned deironing carbon removing device two, is wherein 100 ° of angles between three melt electrodes, and energising melting, makes the temperature of fusion tank be between 1300-1600 DEG C, by spherolite fusing, deironing de-carbon, obtains high-temperature fusion liquid.This operation can carry out one or many, until carbon mass content is wherein less than 0.1%, weight of iron content is less than 0.5%.
D, fibroblast
Carried out getting rid of a fibroblast by the high-temperature fusion liquid of step C, wherein fibroblast temperature is 1400 DEG C, and the rotating speed of tumbling machine is 6000 revs/min, obtains the finished product mineral wool, called after KWM2.
Embodiment 3
A, batching
Take following component (1)-(5) respectively:
(1) CaO mass content is the high-calcium fly ass of 30%;
(2)SiO 2
(3)Al 2O 3
(4)MgO;
(5)CaO;
Said components is carried out proportioning, then mixes, pulverize, prepared burden, each amounts of components ratio wherein during proportioning, should make the SiO in final gained mineral wool 2mass percentage is 42%, Al 2o 3mass percentage is 18%, CaO mass percentage be 30% and MgO mass percentage be 3%, other is impurity component.
B, pelletizing
In the batching of steps A gained, add polyvinyl alcohol, wherein the quality of polyvinyl alcohol is 5% of batching quality, obtains the spherolite that diameter is 6cm after pelletizing.
C, fusing, deironing de-carbon
Being joined by spherolite in above-mentioned deironing carbon removing device one, is wherein 120 ° of angles between three melt electrodes, and energising melting, makes the temperature of fusion tank be between 1300-1600 DEG C, by spherolite fusing, deironing de-carbon, obtains high-temperature fusion liquid.This operation can carry out one or many, until carbon mass content is wherein less than 0.1%, weight of iron content is less than 0.5%.
D, fibroblast
Carried out blowing a fibroblast by the high-temperature fusion liquid of step C, wherein fibroblast temperature is 1450 DEG C, and winding-up wind speed 250 meter per second, obtains the finished product mineral wool, called after KWM3.
Embodiment 4
A, batching
Take following component (1)-(4) respectively:
(1) CaO mass content is the high-calcium fly ass of 40%;
(2)SiO 2
(3)Al 2O 3
(4) MgO; With optional
(5)CaO;
Said components is carried out proportioning, then mixes, pulverize, prepared burden, each amounts of components ratio wherein during proportioning, should make the SiO in final gained mineral wool 2mass percentage is 34%, Al 2o 3mass percentage is 28%, CaO mass percentage be 29% and MgO mass percentage be 3%, other is impurity component.
B, pelletizing
In the batching of steps A gained, add polyvinyl alcohol, wherein the quality of polyvinyl alcohol is 2% of batching quality, obtains the spherolite that diameter is 4cm after pelletizing.
C, fusing, deironing de-carbon
Being joined by spherolite in above-mentioned deironing carbon removing device one, is wherein 60 ° of angles between three melt electrodes, and energising melting, makes the temperature of fusion tank be between 1300-1600 DEG C, by spherolite fusing, deironing de-carbon, obtains high-temperature fusion liquid.This operation can carry out one or many, until carbon mass content is wherein less than 0.1%, weight of iron content is less than 0.5%.
D, fibroblast
Carried out getting rid of a fibroblast by the high-temperature fusion liquid of step C, wherein fibroblast temperature is 1450 DEG C, and the rotating speed of tumbling machine is 7000 revs/min, obtains the finished product mineral wool, called after KWM4.
Embodiment 5
A, batching
Take following component (1)-(4) respectively:
(1) CaO mass content is the high-calcium fly ass of 50%;
(2)SiO 2
(3)Al 2O 3
(4) MgO; With optional
(5)CaO;
Said components is carried out proportioning, then mixes, pulverize, prepared burden, each amounts of components ratio wherein during proportioning, should make the SiO in final gained mineral wool 2mass percentage is 38%, Al 2o 3mass percentage is 22%, CaO mass percentage be 31% and MgO mass percentage be 4%.Other is impurity component.
B, pelletizing
In the batching of steps A gained, add polyvinyl alcohol, wherein the quality of polyvinyl alcohol is 3% of batching quality, obtains the spherolite that diameter is 5cm after pelletizing.
C, fusing, deironing de-carbon
Being joined by spherolite in above-mentioned deironing carbon removing device two, is wherein 120 ° of angles between three melt electrodes, and energising melting, makes the temperature of fusion tank be between 1300-1600 DEG C, by spherolite fusing, deironing de-carbon, obtains high-temperature fusion liquid.This operation can carry out one or many, until carbon mass content is wherein less than 0.1%, weight of iron content is less than 0.5%.
D, fibroblast
Carried out blowing a fibroblast by the high-temperature fusion liquid of step C, wherein fibroblast temperature is 1500 DEG C, and winding-up wind speed 300 meter per second, obtains the finished product mineral wool, called after KWM5.
Fiber check and measure
Use diameter and the form of scanning electron microscopic observation embodiment 1-5 gained mineral wool, such as Fig. 3 is the scanning electron microscope (SEM) photograph of KWM1, from this figure: the mineral wool uniform diameter of gained, smooth surface, has good physical aspect.
Equally, use the mineral wool KWM2-KWM5 of scanning electron microscopic observation embodiment 2-5 gained, find that their same diameter Distribution are even, smooth surface, there is good physical aspect.
The distribution of SMD of KWM1-KMW5 sees the following form in 1.
Fibre product performance
1, mean diameter
Measure the diameter of KWM1-KWM5, see the following form 1.
The mean diameter of the different sample of table 1.
From table 1, the mineral wool mean diameter of embodiment 1-5 all meets the requirement of national standard (3-8 μm), and diameter Distribution scope narrower evenly, thus to can be applicable in multiple specific field.
2, fibrous mechanical property test
Selection length is the above-mentioned KWM1-KWM5 mineral wool of 6-8mm respectively, and use JSF08 type high precision staple fibre mechanical property tester to measure its mechanical property: mineral wool is fixed in the jig of described tester, stretch with the speed of 50mm/min, the power during fracture of record mineral wool, thus obtain its tensile strength, the results are shown in following table 2.
The strength test of table 2. mineral wool
From upper table 2, by gained mineral wool of the present invention, there is good physicals, meet national standard completely.It has good mechanical property simultaneously, and tensile strength is high.
3, mineral wool applied at elevated temperature performance test
Adopt differential thermal analyzer to measure the applied at elevated temperature performance of mineral wool, under adopting air atmosphere, temperature rise rate adopts 10 DEG C/min, analyzes the KWM1-KWM5 mineral wool that case obtains, and the glass transformation temperature of KWM1-KWM5 mineral wool sees the following form 3.
The glass transformation temperature of table 3. mineral wool
Result shows, the glass transformation temperature of KWM1-KWM5 mineral wool is all higher than 750 DEG C, show that the mineral wool that the inventive method is produced has good applied at elevated temperature performance, the life-time service temperature fully meeting the required mineral wool of application of engineering project should lower than the requirement of 750 DEG C.
In sum; the described method of the application of the invention, can be obtained the mineral wool of high added value by high-calcium fly ass, thus has opened up new Application Areas for the high value added utilization of high-calcium fly ass; and greatly protect environment, there is good social benefit and economic worth.
Should be appreciated that the purposes of these embodiments is only not intended to for illustration of the present invention limit the scope of the invention.In addition; also should understand; after having read technology contents of the present invention, those skilled in the art can make various change, amendment and/or modification to the present invention, and these all equivalent form of values fall within the protection domain that the application's appended claims limits equally.

Claims (8)

1. utilize high-calcium fly ass to prepare a method for mineral wool, described method comprises the steps:
A, batching
Take following component (1)-(4) respectively:
(1) high-calcium fly ass;
(2) SiO 2or containing SiO 2mineral;
(3) Al 2o 3or containing Al 2o 3mineral;
(4) MgO or containing MgO mineral; With optional
(5) CaO or containing CaO mineral, carries out proportioning, then mixes, pulverize, prepared burden;
B, pelletizing
Batching is carried out pelletizing, obtains spherolite;
C, fusing, deironing de-carbon
By spherolite fusing, deironing de-carbon, obtain high-temperature fusion liquid;
D, fibroblast
High-temperature fusion liquid blown silk or gets rid of a fibroblast, obtaining the finished product mineral wool;
Carry out melting in step C, the operation of deironing de-carbon time use deironing carbon removing device, described deironing carbon removing device comprises fusion tank, described fusion tank open top, the bottom land of described fusion tank is obliquely installed, the medium position of described bottom land is provided with discharge port, the extreme lower position of described bottom land is provided with the outlet of iron liquid, being provided with three for heating the melt electrode of material in described fusion tank, being mutually 60-120 ° of angle between three described melt electrodes in described fusion tank;
Be provided with some lateral arrangement in described fusion tank and the aeration tube be made up of stupalith, described aeration tube offers some ventilating pits, described aeration tube runs through described fusion tank and described aeration tube one end is closed, and the other end connects compressed air source.
2. the method for claim 1, is characterized in that: in described steps A, component (1)-(5) are carried out each amounts of components ratio during proportioning, should make the SiO in final gained mineral wool 2mass percentage is 28-42%, Al 2o 3mass percentage is 15-30%, CaO mass percentage be 20-35% and MgO mass percentage is 3-8%.
3. method as claimed in claim 1 or 2, is characterized in that: in described steps A, described containing SiO 2mineral are any one or multiple in quartz, cullet, iron tailings; Described containing Al 2o 3mineral are any one or multiple in bauxitic clay, coal gangue; Described is magnesite containing MgO mineral; Described is Wingdale containing CaO mineral.
4. method as claimed in claim 1 or 2, is characterized in that: in step B, adds organic binder bond when granulation, and described organic binder bond is the 1-5% of batching quality.
5. method as claimed in claim 1 or 2, is characterized in that: the carbon mass content in the gained molten mass after the deironing de-carbon operation of step C is less than 0.1%, weight of iron content is less than 0.5%.
6. method as claimed in claim 1 or 2, is characterized in that: when carrying out the described deironing de-carbon operation of step C, the temperature of fusion tank controls between 1300-1600 DEG C.
7. method as claimed in claim 1 or 2, it is characterized in that: in step D, fibroblast temperature is 1350-1550 DEG C.
8. method as claimed in claim 1 or 2, is characterized in that: in step D, when blowing a thread fibroblast, and winding-up wind speed >=200 meter per second; When getting rid of a thread fibroblast, the rotating speed of tumbling machine is 6000-7200 rev/min.
CN201410209959.6A 2014-05-19 2014-05-19 A kind of method utilizing high-calcium fly ass to prepare mineral wool Expired - Fee Related CN103979787B (en)

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CN108238716A (en) * 2018-01-12 2018-07-03 江苏巨盈节能环保科技有限公司 A kind of poisonous and harmful solid waste comprehensive utilization product and preparation method
CN110746118A (en) * 2019-10-18 2020-02-04 酒泉钢铁(集团)有限责任公司 Comprehensive utilization method of fly ash based on mineral wool tempering
CN111499364A (en) * 2020-05-11 2020-08-07 唐山顺浩环保科技有限公司 Superfine ceramic fiber cotton and production method thereof

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CN1245343C (en) * 2004-05-14 2006-03-15 华东理工大学 Method for manufacturing superfine fiber using flyash as raw material
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