CN104529518A - Lead-zinc tailing-red mud-flyash-based foamed ceramic and preparation method thereof - Google Patents
Lead-zinc tailing-red mud-flyash-based foamed ceramic and preparation method thereof Download PDFInfo
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Abstract
The invention discloses lead-zinc ore tailing-red mud-flyash-based foamed ceramic and a preparation method of the lead-zinc tailing-red mud-flyash-based foamed ceramic. The foamed ceramic is formed by conducting blank forming and sintering on principal raw materials such as lead-zinc tailings, red mud, fly ash and sintering additives. Preparation processes are simple, reaction conditions are mild, the raw materials are low in cost, and the prepared foamed ceramic takes Na6Ca2Al6Si6O24(SO4)2 as a principal crystalline phase and includes Fe2O3, little CaSO4, Fe3O4, a SiO2 phase and a glass phase. The foamed ceramic has the advantages of being light, high in strength, soundproof, capable of keeping warm, fireproof, free from secondary pollution and the like; specifically, the porosity of the foamed ceramic is as high as 62.2%-78.5%, the density of the foamed ceramic ranges from 0.42 g*cm<-3> to 0.81 g*cm<-3>, the compressive strength of the foamed ceramic ranges from 4.8 MPa to 8.4 MPa, and the acid and alkali resistance of the foamed ceramic is higher than 98%.
Description
Technical field
The present invention relates to a kind of lead-zinc ore tailings-red mud-fly ash base foamed ceramics and preparation method thereof; Belong to solid slag treatment technology and building ceramics field.
Background technology
On the one hand, industrial residue becomes social effects of pollution, must find a large amount of effective way consuming industrial residue.Produce the solid slag such as a large amount of mine tailing (as silica sand mine tailing, bauxite gangue, lead-zinc ore tailings), fuel waste residue, melting waste slag, water treatment sludge and industrial dust in China's suitability for industrialized production, its quantity discharged is just increasing progressively with the speed of annual about 1,200,000,000 tons.So far, industrial solid waste residue is only limitted to low level purposes (as be deposited in outdoor slag field, build the road, backfilling goaf etc.).Only small part is used to produce the material of construction such as cement, wall brick, silicate lock, gas concrete, bubble cement, and the waste residue kind introduced and introduction volume all extremely limited (about 30%).China's Pb-Zn deposits rich in mineral resources.Because existing weaponry and equipment and technical qualification limit, ore dressing difficulty is high, Pb-Zn deposits exploitation with utilize in process, create a large amount of lead-zinc ore tailings, thus result in a series of resource and environment problem, stack as mine tailing and take a large amount of soil, the maintenance of Tailings Dam produces great number cost, and in mine tailing, the loss of heavy metal ion does great damage to periphery ecotope and potential safety hazard etc. existing for tailing dam.Red mud (being also red soil) is the by-product produced in raw material production alumina process by bauxite, containing a large amount of strong alkaline substance in red mud, is easy to the alkalization causing Soil Surrounding.Up to the present, the practical efficiency of lead-zinc ore tailings and red mud two kinds of solid slags is all extremely low.Flyash is the solid waste that coal-burning power plant gives off, although the utilization of this industrial residue reaches higher degree, is mainly used as cement, concrete additive.Along with the development of power industry, the quantity discharged of flyash is also increasing year by year, deals carefully with if do not added, and will produce airborne dust, atmosphere pollution, one of main composition becoming haze; If enter in water, then river can be caused to block, and hazardous and noxious substances wherein also can work the mischief to human body and biology.Building materials industry is the unique channel realizing the large utilization of industrial solid waste residue and high value added utilization.Rural urbanization, Comfortable Housing Project construction, new industry development, Urban renewal, the improvement of living conditions, the pressure of building energy conservation etc. provide wide development space for material of construction, and building material market capacity is very big.
On the other hand, Global climate change control objectives, proposing the year two thousand fifty will by architectural resource usage quantity minimizing 60%.The building energy consumption produced due to wall and window accounts for 38% of global energy consumption, therefore, realize building energy consumption control objectives, and the energy consumption of building walls and window controls to be crucial.To the control of window hot-fluid, existing better energy-saving scheme and product, namely adopt double glazing unit, and problem at present and in the future reduces its cost, promotes its application.But for the control of building walls heat flux, there is no effective way at present, at least can say poor effect.Although polyurethane foamed material has excellent heat insulation and preservation effect, it is inflammable, and combustionvelocity is fast, and fire easily causes big fire rapid spread, and produces hypertoxic hydrogen cyanide gas, cause personnel death after occurring; Foamed cement goods are without high temperature sintering, and energy consumption is low, and cost is low, light weight, and heat insulation and preservation effect is good.But the waste residue introduction volume in foamed cement is low, only introduces the waste residues such as a small amount of flyash, blast furnace slag at present; The intensity of foamed cement is lower; Particularly when introducing waste residue, due to without high temperature sintering, being difficult to be formed firmly chemical bonding between composition particle, there is hidden danger in the stability under goods life-time service and work reliability.Be badly in need of development of new every gesture lagging material.
As a kind of green energy conservation material, the advantages such as inorganic foamed stupalith is little with its volume density, void content is high, thermal conductivity is low, are paid attention to more and more widely.At present, more existing researchs are utilizing various mine tailing and industrial residue to prepare foam materials, and this not only can save the ceramic resources of high-quality, reduce production cost, can also improve the utilization ratio of secondary resource, solve problem of environmental pollution, have far-reaching practical significance.
In lead-zinc ore tailings, red mud, flyash three kinds of waste residues, the main ingredient of lead-zinc ore tailings is SiO
2, Al
2o
3, Fe
2o
3, CaCO
3, MnO, MgO, K
2o, TiO
2, FeS
2, CaSO
4, ZnO, PbO etc.The main component of red mud is SiO
2, Al
2o
3, Na
2o, Fe
2o
3, CaCO
3, MnO, MgO, K
2o, TiO
2, P
2o
5deng.The main component of flyash is SiO
2, Al
2o
3, Na
2o, Fe
2o
3, CaCO
3, MnO, MgO, K
2o, TiO
2, P
2o
5deng.These industrial residue complicated components, but contain the requisite composition of material of construction in these waste residues, as SiO
2, Al
2o
3, CaO, Fe
2o
3deng, and how these waste residues are utilized the material of construction preparing better performances well, be in prior art, have technical barrier to be solved.
Prior art is being prepared in foamed ceramics with industrial solid slag, and patent CN103253961A discloses a kind of foamed ceramic material using Pb-Zn tailings to be main raw material and preparation method thereof.Its composition and ratio and technique as follows: 1) composition and ratio: Pb-Zn tailings 45 ~ 70%, waste residues of polished tiles 28 ~ 52%, whipping agent 0.5 ~ 3%; 2) technique: in the saggar that admixtion loading refractory materials is made, put into kiln, sinter at 1130 ~ 1230 DEG C of temperature, insulation 30 ~ 80min, excision forming after cooling.The utilization ratio of the method Pb-Zn tailings is high, and unit weight is little, and thermal conductivity is low, but the sintering temperature of foamed ceramics is too high, and the performance such as intensity and chemical stability uncertain.Patent CN103304253A discloses and a kind ofly utilizes red mud and the standby porous ceramics of coal ash for manufacturing and preparation method thereof.Its composition and ratio and technique as follows: 1) composition and ratio: red mud 40 ~ 70%, flyash 5 ~ 40%, pore-forming material 10 ~ 30%, additive 1 ~ 5%; 2) technique: after being mixed in proportion by raw material, obtains porous ceramic film material through shaping, dry, firing process.Porous ceramics void content prepared by the method is on the low side.
The technology utilizing solid slag to prepare foamed ceramics in prior art exist less to industrial solid waste residue utilization species number, utilization ratio is lower, sintering temperature is high, void content is low, intensity is low, the not congruent problem of performance perameter, the object of the invention is to be to provide a kind of raw slag material that makes full use of to carry out scientific ingredients and obtain a kind ofly having lightweight, high-strength, sound insulation, heat insulation, insulation, fire prevention, do not produce the foamed ceramics of secondary pollution.
Another object of the present invention be to provide a kind of simple to operate, preparation condition simple, the method for the lead-zinc ore tailings-red mud-fly ash base foamed ceramics of low cost.
The invention provides a kind of lead-zinc ore tailings-red mud-fly ash base foamed ceramics, this foamed ceramics is formed by base, sintering by following mass percent component raw material: lead-zinc ore tailings 10 ~ 24%; Red mud 9 ~ 16%; Flyash 43 ~ 53%; Sintering agent 18 ~ 30%.
Preferred sintering agent can be at least one in alkalimetal oxide, an alkali metal salt compounds, alkaline earth metal oxide, alkaline-earth metal salt compounds; Most preferably be boric acid sodium salt.Sintering agent add the deficiency effectively can supplementing sintering agent composition in waste residue.
In preferred lead-zinc ore tailings-red mud-fly ash base foamed ceramics, lead-zinc ore tailings, red mud and flyash account for 70 ~ 82% of raw material total mass.These three kinds of waste residues of lead-zinc ore tailings, red mud and flyash are main raw material, play foaming effect again.
Present invention also offers a kind of preparation method of described lead-zinc ore tailings-red mud-fly ash base foamed ceramics, after lead-zinc ore tailings, red mud, flyash and sintering agent powder being sieved, the water of additional raw material gross weight 3 ~ 5%, mixes, obtained admixtion; After die-filling for gained admixtion, compression moulding, obtains foamed ceramics base substrate; Gained foamed ceramics base substrate is first placed at the temperature of < 200 DEG C dry, then sinters at the temperature being placed in 820 ~ 980 DEG C, and cooling, obtains foamed ceramics.
The preparation method of lead-zinc ore tailings-red mud-fly ash base foamed ceramics of the present invention also comprises following preferred version:
In preferred scheme, foamed ceramics base substrate is placed in stove, drying and sintering are carried out in intensification, before 200 DEG C, with the heating of the temperature rise rate of 2 ~ 3 DEG C/min, drying is carried out to ceramic body, temperature is increased to after 200 DEG C, be heated to 820 ~ 980 DEG C with the temperature rise rate of 3 ~ 5 DEG C/min, be incubated 0.5 ~ 3 hour.
In preferred scheme, a small amount of adding of water plays adhesive property, is conducive to the compression moulding of raw material.
In preferred scheme, lead-zinc ore tailings, red mud, flyash and sintering agent powder are by sieving, and it is 100 ~ 300 object powder that sieve gets granularity.
In preferred scheme, compression moulding adopts one side pressuring method shaping, and forming pressure is 15 ~ 20MPa.
In preferred scheme, the type of cooling is furnace cooling.
Technical superiority of the present invention and the Advantageous Effects brought: find through the large quantity research of contriver, by the three kinds of reasonably combined uses of industrial solid waste residue of lead-zinc ore tailings, red mud and flyash, be particularly suitable for preparing foamed ceramics.
1) lead-zinc ore tailings, red mud and flyash is composite by suitable mass ratio, make SiO wherein
2, Al
2o
3composition fully plays skeleton function in foamed ceramics, can give the excellent mechanical property of foamed ceramics, thermal property and chemical stability; And usually, SiO
2and Al
2o
3content is higher, then foamed ceramics intensity is higher, thermal expansivity is lower, chemical stability is better, but sintering temperature simultaneously needed for it is also high, therefore, the sintering temperature that will simultaneously keep foamed ceramics lower and good performance, must meet the rational proportion between each industrial residue.
2) a certain proportion of FeS is contained in these three kinds of solid slags
2and CaCO
3deng.FeS is sintered under the temperature condition of the present invention program
2with the O in air
2reaction, generates SO
2gas, the CaCO in waste residue
3be decomposed into CaO and CO
2gas, meets whipping agent requirement required in sintering process, completely without the need to adding whipping agent in addition.
3) CaO, MgO, Na of containing in each raw slag material
2o, K
2the alkaline-earth metal such as O and alkalimetal oxide are excellent sintering aids, greatly can reduce the sintering temperature of material; Meanwhile, CaO, MgO, Na
2o, K
2o and SiO
2, Al
2o
3chemical reaction occurs, generates silicate, aluminate melt, and then form glassy phase, on the one hand, the formation of silicate, aluminate can to Na
+, K
+ion and heavy metal ion play " constraint " effect, and in the use procedure of material, these bound alkalimetal ions and heavy metal ion are difficult to discharge, thus can solve alkalization of soils and heavy-metal pollution problem; On the other hand, the formation of glassy phase again can by gas wrapping and by radiation sealing.
4) P in raw slag material
2o
5, TiO
2, Fe
2o
3, MnO etc. can participate in the formation of material, do not need to carry out any removal of impurities process to raw slag material, raw slag material is brought and can be used, thus reduces the cost of raw material.
Technical advantage of the present invention in sum, brings technique effect excellent especially:
1, take full advantage of three kinds of industrial solid waste residues and prepare foamed ceramics, the total introduction volume of solid slag reaches 70 ~ 82%, achieves the comprehensive utilization of solid slag, turns waste into wealth, and produces larger economic benefit.
2, preparation process condition is simple, and the sintering temperature of foamed ceramics is lower, only 820 ~ 980 DEG C.
3, the foamed ceramics of preparation is with Na
6ca
2al
6si
6o
24(SO
4)
2for principal crystalline phase, comprise Fe
2o
3, a small amount of CaSO
4, Fe
3o
4, SiO
2mutually and glassy phase, it has lightweight, high-strength, sound insulation, heat insulation, insulation, fire prevention, does not produce the features such as secondary pollution; Be embodied in the void content of foamed ceramics up to 62.2 ~ 78.5%, density 0.42 ~ 0.81g.cm
-3, ultimate compression strength reaches 4.8 ~ 8.4MPa, and resistance to acids and bases is more than 98%.
Summary of the invention
Accompanying drawing explanation
The XRD figure of [Fig. 1] foamed ceramics prepared by the embodiment of the present invention 7, principal crystalline phase is wherein Na
6ca
2al
6si
6o
24(SO
4)
2and Fe
2o
3, also have a small amount of CaSO
4, Fe
3o
4and SiO
2phase.
The sectional view in kind of [Fig. 2] foamed ceramics prepared by the embodiment of the present invention 7.
Specific embodiments
Below in conjunction with embodiment, content of the present invention is described further, but should limit the scope of the invention with this.
Embodiment 1
Various raw material is sieved, gets the powder of granularity between 100 ~ 300 orders, weigh and Homogeneous phase mixing by following mass percent: lead-zinc ore tailings 10%, red mud 12%, flyash 48%, Sodium Tetraborate 30%, the water of additional raw material gross weight 3%, mixes, makes admixtion; Admixtion is put into metal die and be pressed into foamed ceramics base substrate under 18MPa, put into after resistance furnace is first at the uniform velocity warmed up to 200 DEG C with 2 DEG C/min, to be at the uniform velocity warmed up to 830 DEG C to 4 DEG C/min, be incubated naturally cooling after 0.5 hour.The volume density of obtained foamed ceramics is 0.55g/cm
3, void content is 62.2%, and ultimate compression strength is 5.7MPa, and acid resistance is 98.6%, and alkali resistance is 99.1%.
Embodiment 2
Various raw material is sieved, gets the powder of granularity between 100 ~ 300 orders, weigh and Homogeneous phase mixing by following mass percent: lead-zinc ore tailings 10%, red mud 11%, flyash 53%, Sodium Tetraborate 26%, the water of additional raw material gross weight 3%, mixes, makes admixtion; Admixtion is put into metal die and be pressed into foamed ceramics base substrate under 18MPa, put into after resistance furnace is first at the uniform velocity warmed up to 200 DEG C with 3 DEG C/min, to be at the uniform velocity warmed up to 860 DEG C to 4 DEG C/min, be incubated naturally cooling after 0.5 hour.The volume density of obtained foamed ceramics is 0.59g/cm
3, void content is 72.1%, and ultimate compression strength is 5.5MPa, and acid resistance is 98.7%, and alkali resistance is 99.3%.
Embodiment 3
Various raw material is sieved, gets the powder of granularity between 100 ~ 300 orders, weigh and Homogeneous phase mixing by following mass percent: lead-zinc ore tailings 13%, red mud 12%, flyash 51%, Sodium Tetraborate 24%, the water of additional raw material gross weight 3%, mixes, makes admixtion; Admixtion is put into metal die and be pressed into foamed ceramics base substrate under 18MPa, put into after resistance furnace is first at the uniform velocity warmed up to 200 DEG C with 3 DEG C/min, to be at the uniform velocity warmed up to 850 DEG C to 4 DEG C/min, be incubated naturally cooling after 0.5 hour.The volume density of obtained foamed ceramics is 0.42g/cm
3, void content is 78.3%, and ultimate compression strength is 4.8MPa, and acid resistance is 98.5%, and alkali resistance is 99.1%.
Embodiment 4
Various raw material is sieved, gets the powder of granularity between 100 ~ 300 orders, weigh and Homogeneous phase mixing by following mass percent: lead-zinc ore tailings 15%, red mud 13%, flyash 52%, Sodium Tetraborate 20%, the water of additional raw material gross weight 4%, mixes, makes admixtion; Admixtion is put into metal die and be pressed into foamed ceramics base substrate under 18MPa, put into after resistance furnace is first at the uniform velocity warmed up to 200 DEG C with 3 DEG C/min, to be at the uniform velocity warmed up to 980 DEG C to 5 DEG C/min, be incubated naturally cooling after 1 hour.The volume density of obtained foamed ceramics is 0.81g/cm
3, void content is 74.2%, and ultimate compression strength is 8.4MPa, and acid resistance is 98.6%, and alkali resistance is 99.1%.
Embodiment 5
Various raw material is sieved, gets the powder of granularity between 100 ~ 300 orders, weigh and Homogeneous phase mixing by following mass percent: lead-zinc ore tailings 15%, red mud 11%, flyash 44%, Sodium Tetraborate 30%, the water of additional raw material gross weight 3%, mixes, makes admixtion; Admixtion is put into metal die and be pressed into foamed ceramics base substrate under 18MPa, put into after resistance furnace is first at the uniform velocity warmed up to 200 DEG C with 3 DEG C/min, to be at the uniform velocity warmed up to 820 DEG C to 3 DEG C/min, be incubated naturally cooling after 0.5 hour.The volume density of obtained foamed ceramics is 0.62g/cm
3, void content is 68.5%, and ultimate compression strength is 6.3MPa, and acid resistance is 98.4%, and alkali resistance is 99.2%.
Embodiment 6
Various raw material is sieved, gets the powder of granularity between 100 ~ 300 orders, weigh and Homogeneous phase mixing by following mass percent: lead-zinc ore tailings 18%, red mud 13%, flyash 47%, Sodium Tetraborate 22%, the water of additional raw material gross weight 4%, mixes, makes admixtion; Admixtion is put into metal die and be pressed into foamed ceramics base substrate under 18MPa, put into after resistance furnace is first at the uniform velocity warmed up to 200 DEG C with 3 DEG C/min, to be at the uniform velocity warmed up to 975 DEG C to 5 DEG C/min, be incubated naturally cooling after 1 hour.The volume density of obtained foamed ceramics is 0.72g/cm
3, void content is 71.2%, and ultimate compression strength is 7.4MPa, and acid resistance is 98.3%, and alkali resistance is 99.1%.
Embodiment 7
Various raw material is sieved, gets the powder of granularity between 100 ~ 300 orders and weigh and Homogeneous phase mixing by following mass percent: lead-zinc ore tailings 20%, red mud 12%, flyash 48%, Sodium Tetraborate 20%, the water of additional raw material gross weight 4%, mix, make admixtion; Admixtion is put into metal die and be pressed into foamed ceramics base substrate under 18MPa, put into after resistance furnace is first at the uniform velocity warmed up to 200 DEG C with 3 DEG C/min, to be at the uniform velocity warmed up to 980 DEG C to 5 DEG C/min, be incubated naturally cooling after 1 hour.The volume density of obtained foamed ceramics is 0.68g/cm
3, void content is 75.1%, and ultimate compression strength is 7.8MPa, and acid resistance is 98.4%, and alkali resistance is 99.3%.
Embodiment 8
Various raw material is sieved, gets the powder of granularity between 100 ~ 300 orders, weigh and Homogeneous phase mixing by following mass percent: lead-zinc ore tailings 20%, red mud 12%, flyash 48%, Sodium Tetraborate 20%, the water of additional raw material gross weight 4%, mixes, makes admixtion; Admixtion is put into metal die and be pressed into foamed ceramics base substrate under 18MPa, put into after resistance furnace is first at the uniform velocity warmed up to 200 DEG C with 3 DEG C/min, to be at the uniform velocity warmed up to 980 DEG C to 5 DEG C/min, be incubated naturally cooling after 3 hours.The volume density of obtained foamed ceramics is 0.71g/cm
3, void content is 78.5%, and ultimate compression strength is 7.1MPa, and acid resistance is 98.4%, and alkali resistance is 99.2%.
Embodiment 9
Various raw material is sieved, gets the powder of granularity between 200 ~ 300 orders, weigh and Homogeneous phase mixing by following mass percent: lead-zinc ore tailings 21%, red mud 16%, flyash 43%, Sodium Tetraborate 20%, the water of additional raw material gross weight 4%, mixes, makes admixtion; Admixtion is put into metal die and be pressed into foamed ceramics base substrate under 18MPa, put into after resistance furnace is first at the uniform velocity warmed up to 200 DEG C with 3 DEG C/min, to be at the uniform velocity warmed up to 980 DEG C to 5 DEG C/min, be incubated naturally cooling after 1 hour.The volume density of obtained foamed ceramics is 0.75g/cm
3, void content is 70.7%, and ultimate compression strength is 6.9MPa, and acid resistance is 98.2%, and alkali resistance is 99.2%.
Embodiment 10
Various raw material is sieved, gets the powder of granularity between 200 ~ 300 orders, weigh and Homogeneous phase mixing by following mass percent: lead-zinc ore tailings 22%, red mud 9%, flyash 51%, Sodium Tetraborate 18%, the water of additional raw material gross weight 5%, mixes, makes admixtion; Admixtion is put into metal die and be pressed into foamed ceramics base substrate under 18MPa, put into after resistance furnace is first at the uniform velocity warmed up to 200 DEG C with 3 DEG C/min, to be at the uniform velocity warmed up to 950 DEG C to 5 DEG C/min, be incubated naturally cooling after 1 hour.The volume density of obtained foamed ceramics is 0.77g/cm
3, void content is 65.8%, and ultimate compression strength is 7.9MPa, and acid resistance is 98.2%, and alkali resistance is 99.1%.
Embodiment 11
Various raw material is sieved, gets the powder of granularity between 200 order ~ 300 orders, weigh and Homogeneous phase mixing by following mass percent: lead-zinc ore tailings 24%, red mud 10%, flyash 46%, Sodium Tetraborate 20%, the water of additional raw material gross weight 4%, mixes, makes admixtion; Admixtion is put into metal die and be pressed into foamed ceramics base substrate under 18MPa, put into after resistance furnace is first at the uniform velocity warmed up to 200 DEG C with 3 DEG C/min, to be at the uniform velocity warmed up to 930 DEG C to 5 DEG C/min, be incubated naturally cooling after 1 hour.The volume density of obtained foamed ceramics is 0.81g/cm
3, void content is 63.3%, and ultimate compression strength is 7.5MPa, and acid resistance is 98.1%, and alkali resistance is 99.1%.
The performance perameter index of foamed ceramics prepared by table 1 embodiment 1 ~ 11
In all embodiments, the incompressible intensity of sample records according to GB/T 1964-1996 " porous ceramics compressive strength testing method ".
In all embodiments, the acid resistance of sample and alkali resistance record according to GB/T 1970-1996 " porous ceramics acidproof, alkali corrosion resistance method for testing performance ".
Claims (7)
1. lead-zinc ore tailings-red mud-fly ash base foamed ceramics, is characterized in that, is formed by base, sintering by following mass percent component raw material:
Lead-zinc ore tailings 10 ~ 24%;
Red mud 9 ~ 16%;
Flyash 43 ~ 53%;
Sintering agent 18 ~ 30%.
2. lead-zinc ore tailings-red mud-fly ash base foamed ceramics according to claim 1, is characterized in that, described sintering agent is at least one in alkalimetal oxide, an alkali metal salt compounds, alkaline earth metal oxide, alkaline-earth metal salt compounds.
3. lead-zinc ore tailings-red mud-fly ash base foamed ceramics according to claim 2, is characterized in that, described sintering agent is boric acid sodium salt.
4. the preparation method of the lead-zinc ore tailings-red mud-fly ash base foamed ceramics described in any one of claims 1 to 3, it is characterized in that, after lead-zinc ore tailings, red mud, flyash and sintering agent powder are sieved, the water of additional raw material gross weight 3 ~ 5%, mix, obtained admixtion; After die-filling for gained admixtion, compression moulding, obtains foamed ceramics base substrate; Gained foamed ceramics base substrate is first placed at the temperature of < 200 DEG C dry, then sinters at the temperature being placed in 820 ~ 980 DEG C, and cooling, obtains foamed ceramics.
5. the preparation method of lead-zinc ore tailings-red mud-fly ash base foamed ceramics according to claim 4, it is characterized in that, foamed ceramics base substrate is placed in stove, drying and sintering are carried out in intensification, before 200 DEG C, carry out drying with the heating of the temperature rise rate of 2 ~ 3 DEG C/min to ceramic body, temperature is increased to after 200 DEG C, be heated to 820 ~ 980 DEG C with the temperature rise rate of 3 ~ 5 DEG C/min, be incubated 0.5 ~ 3 hour.
6. the preparation method of lead-zinc ore tailings-red mud-fly ash base foamed ceramics according to claim 4, is characterized in that, lead-zinc ore tailings, red mud, flyash and sintering agent powder are by sieving, and it is 100 ~ 300 object powder that sieve gets granularity.
7. the preparation method of lead-zinc ore tailings-red mud-fly ash base foamed ceramics according to claim 4, is characterized in that, in compression moulding process, pressure size is 15 ~ 20MPa.
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| CN102674883A (en) * | 2012-06-11 | 2012-09-19 | 济南大学 | Foamed ceramic insulation board and preparation method thereof |
| CN102731138A (en) * | 2012-07-17 | 2012-10-17 | 湖南亿泰环保科技股份有限公司 | Fly ash based high-strength and high-porosity foamed ceramic and preparation method thereof |
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| CN104860655A (en) * | 2015-05-04 | 2015-08-26 | 安徽省亚欧陶瓷有限责任公司 | Crystal macadam ceramic tile capable of allaying tiredness and preparation method thereof |
| CN107353032A (en) * | 2017-07-13 | 2017-11-17 | 郑州大学 | A kind of exterior insulation and preparation method using industrial inorganic hazardous waste and fire clay mine tailing as raw material |
| CN107353032B (en) * | 2017-07-13 | 2020-07-31 | 郑州大学 | Foamed ceramic insulation board taking industrial inorganic hazardous wastes and refractory clay tailings as raw materials and preparation method thereof |
| CN108946680A (en) * | 2018-07-03 | 2018-12-07 | 贵州大学 | A kind of technique preparing Aluminum titanate powder coproduction acid |
| CN110606755A (en) * | 2019-09-05 | 2019-12-24 | 广西泓尚科技有限责任公司 | Production method of foamed ceramic with high fire-resistant limit performance |
| CN115959893A (en) * | 2022-11-02 | 2023-04-14 | 常熟理工学院 | Low-cost non-metal mineral microwave medium ceramic material and preparation method thereof |
| CN115959893B (en) * | 2022-11-02 | 2023-10-24 | 常熟理工学院 | Low-cost nonmetallic mineral microwave dielectric ceramic material and preparation method thereof |
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