CN104529518B - A kind of lead-zinc ore tailings-red mud-fly ash base foamed ceramics and preparation method thereof - Google Patents

A kind of lead-zinc ore tailings-red mud-fly ash base foamed ceramics and preparation method thereof Download PDF

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CN104529518B
CN104529518B CN201510008874.6A CN201510008874A CN104529518B CN 104529518 B CN104529518 B CN 104529518B CN 201510008874 A CN201510008874 A CN 201510008874A CN 104529518 B CN104529518 B CN 104529518B
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foamed ceramics
lead
red mud
zinc ore
ore tailings
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CN104529518A (en
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卢安贤
刘涛涌
刘宏伟
李秀英
胡晓林
刘飘
张骞
宋俊
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HUNAN BAIWO INDUSTRIAL DEVELOPMENT Co Ltd
Central South University
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HUNAN BAIWO INDUSTRIAL DEVELOPMENT Co Ltd
Central South University
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Abstract

The invention discloses a kind of lead-zinc ore tailings red-mud coal ash base foamed ceramics and preparation method thereof, this foamed ceramics is formed by base, sintering by primary raw material components such as lead-zinc ore tailings, red mud, flyash and sintering aids: this preparation technology is simple, reaction condition is gentle, cost of material is low, and the foamed ceramics of preparation is with Na6Ca2Al6Si6O24(SO4)2For principal crystalline phase, comprise Fe2O3, a small amount of CaSO4、Fe3O4And SiO2Mutually with glass phase；It has lightweight, high-strength, sound insulation, heat insulation, insulation, fire prevention, does not produce the features such as secondary pollution；The porosity being embodied in foamed ceramics is up to 62.2～78.5%, density 0.42～0.81g.cm‑3, compression strength reaches 4.8～8.4MPa, and resistance to acids and bases is more than 98%.

Description

A kind of lead-zinc ore tailings-red mud-fly ash base foamed ceramics and preparation method thereof
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 Body Solid state fermentation technology and building ceramics field.
Background technology
On the one hand, industrial residue has become social effects of pollution, it is necessary to find a large amount of effective way consuming industrial residue. China's industrialized production produces a large amount of mine tailing (such as silica sand mine tailing, bauxite gangue, lead-zinc ore tailings), combustion The solid slags such as material waste residue, melting waste slag, water treatment sludge and industrial dust, its discharge capacity is just with every year about The speed of 1200000000 tons is being incremented by.So far, industrial solid waste residue is only limitted to low level purposes and (is such as deposited in outdoor Slag field, build the road, backfilling goaf etc.).Only small part be used for produce cement, wall brick, silicate lock, The construction materials such as air entrained concrete, bubble cement, and the waste residue species and the introduction volume that introduce are all extremely limited (about 30%).China's Pb-Zn deposits rich in mineral resources.Owing to existing weaponry and equipment and technical conditions are limited, ore dressing difficulty is high, During the exploitation and utilization of Pb-Zn deposits, create a large amount of lead-zinc ore tailings, thus result in a series of resource With environmental problem, stacking such as mine tailing and taking a large amount of soil, the maintenance of Tailings Dam produces great number cost, weight in mine tailing Periphery ecological environment is done great damage and the potential safety hazard existing for tailing dam by the loss of metal ion Deng.Red mud (being also red soil) is by the by-product that bauxite is generation in raw material production alumina process, red mud In contain a large amount of strong alkaline substances, it is easy to cause the alkalization of Soil Surrounding.Up to the present, lead-zinc ore tailings All extremely low with the practical efficiency of two kinds of solid slags of red mud.Flyash is that the solid that coal-burning power plant gives off gives up Thing, although the utilization of this industrial residue has reached to a high degree, but is primarily used to cement, the adding of concrete Add agent.With the development of power industry, the discharge capacity of flyash is also increasing year by year, as being not added with dealing carefully with, Airborne dust, atmosphere pollution will be produced, become one of mainly comprising of haze；If entering in water, then can cause river Stream blocking, human body and biology also can be worked the mischief by poisonous and harmful substance therein.Building materials industry is to realize The large unique channel utilizing with high value added utilization of industrial solid waste residue.Rural urbanization, Comfortable Housing Project construction, New industry development, Urban renewal, the improvement of living conditions, the pressure etc. of building energy conservation provide for construction material Wide development space, building material market capacity is very big.
On the other hand, Global climate change control target, proposition to the year two thousand fifty will be by architectural resource usage amount Reduce 60%.The building energy consumption producing due to wall and window accounts for 38% that global energy consumes, therefore, Building energy consumption to be realized controls target, and the energy consumption control of building walls and window is crucial.To window hot-fluid Control, existing preferable energy-saving scheme and product, i.e. use double layer glass, problem at present and in the future is Reduce its cost, promote its application.But for the control of building walls heat flow, there is no at present The way of effect, at least it may be said that poor effect.Although polyurethane foamed material has excellent heat insulation and preservation effect, But it is inflammable, burning velocity is fast, after fire occurs, easily causes big fire to spread rapidly, and produces severe toxicity cyaniding Hydrogen, causes personnel death；Foamed cement goods are without high temperature sintering, and energy consumption is low, low cost, light weight, Heat insulation and preservation effect is good.But the waste residue introduction volume in foamed cement is low, only introduce a small amount of flyash, height at present The waste residues such as slag；The intensity of foamed cement is relatively low；Particularly when introducing waste residue, due to without high temperature sintering, Being difficult to be formed firm chemical bonding between composition particle, the stability under goods Long-Time Service and use are reliable There is hidden danger in property.It is badly in need of exploitation novel every gesture insulation material.
As a kind of green energy conservation material, inorganic foamed ceramic material is little with its volume density, the porosity is high, hot lead The advantages such as rate is low, are increasingly paid attention to widely.At present, some researchs existing are utilizing various mine tailing and work Foamed material prepared by industry waste residue, and this not only can save the ceramic resources of high-quality, reduces production cost, can also carry The utilization rate of high secondary resource, solves problem of environmental pollution, has far-reaching practical significance.
In lead-zinc ore tailings, red mud, three kinds of waste residues of flyash, the key component of lead-zinc ore tailings is SiO2、 Al2O3、Fe2O3、CaCO3、MnO、MgO、K2O、TiO2、FeS2、CaSO4, ZnO, PbO etc.. Red mud be mainly composed of SiO2、Al2O3、Na2O、Fe2O3、CaCO3、MnO、MgO、K2O、TiO2、 P2O5Deng.Flyash be mainly composed of SiO2、Al2O3、Na2O、Fe2O3、CaCO3、MnO、MgO、 K2O、TiO2、P2O5Deng.These industrial residue complicated components, but these waste residues contain construction material Requisite composition, such as SiO2、Al2O3、CaO、Fe2O3Deng, and how by fine for these waste residues land productivity It with the construction material preparing better performances, is that prior art has technical barrier to be solved.
Prior art in terms of with industry, solid slag prepares foamed ceramics, the public affairs of patent CN103253961A Open a kind of foamed ceramic material using Pb-Zn tailings to be primary raw material and preparation method thereof.Its composition and ratio and Technique is as follows: 1) composition and ratio: Pb-Zn tailings 45～70%, waste residues of polished tiles 28～52%, foaming agent 0.5～3%； 2) technique: batch loads in the saggar that refractory material is made, and puts in kiln, 1130～1230 DEG C of temperature Lower sintering, is incubated 30～80min, excision forming after cooling.The utilization rate of the method Pb-Zn tailings is high, unit weight Little, thermal conductivity factor is low, but the sintering temperature of foamed ceramics is too high, and the performance such as intensity and chemical stability is not Determine.Patent CN103304253A disclose a kind of utilize red mud and the standby porous ceramics of coal ash for manufacturing and Preparation method.Its composition and ratio and technique are as follows: 1) composition and ratio: red mud 40～70%, flyash 5～40%, Pore creating material 10～30%, additive 1～5%；2) technique: after raw material is mixed in proportion, through being molded, Be dried, firing process obtains porous ceramic film material.The porous ceramics porosity prepared by the method is on the low side.
Content of the invention
The technology utilizing solid slag to prepare foamed ceramics in prior art exists to industrial solid waste residue utilization thing Number is less, utilization rate is relatively low, sintering temperature is high, the porosity is low, intensity is low, the not congruent problem of performance parameter for kind, It is an object of the invention to be to provide one to make full use of raw slag material to carry out scientific ingredients and obtain one and have gently Matter, high-strength, sound insulation, heat insulation, insulation, fire prevention, the foamed ceramics not producing secondary pollution.
Further object is that a kind of simple to operate, preparation condition of offer is simple, the lead zinc of low cost The method of ore deposit mine tailing-red mud-fly ash base foamed ceramics.
The invention provides a kind of lead-zinc ore tailings-red mud-fly ash base foamed ceramics, this foamed ceramics is by following Mass percent component raw material is formed by base, sintering: lead-zinc ore tailings 10～24%；Red mud 9～16%； Flyash 43～53%；Sintering aid 18～30%.
Preferred sintering aid can be alkali metal oxide, alkali metal salt compounds, alkaline earth oxide, At least one in alkaline-earth metal salt compounds；Most preferably boric acid sodium salt.The addition of sintering aid can be effectively Supplement the deficiency of sintering aid 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 The 70～82% of raw material gross mass.Lead-zinc ore tailings, red mud and flyash these three waste residue are primary raw material, Play again foaming effect.
Present invention also offers the preparation side of a kind of described lead-zinc ore tailings-red mud-fly ash base foamed ceramics Method, after lead-zinc ore tailings, red mud, flyash and sintering aid powder are sieved, additional raw material gross weight 3～5% Water, mix, prepare batch；After die-filling for gained batch, compressing, obtain foamed ceramics Base substrate；Gained foamed ceramics base substrate is first placed in and is dried at a temperature of ＜ 200 DEG C, then is placed in the temperature of 820～980 DEG C The lower sintering of degree, cooling, obtain foamed ceramics.
The preparation method of the lead-zinc ore tailings-red mud-fly ash base foamed ceramics of the present invention also include following preferably Scheme:
Preferred scheme is placed in foamed ceramics base substrate in stove, heats up and be dried and sinter, before 200 DEG C, With the heating rate heating of 2～3 DEG C/min, ceramic body is dried, after temperature is increased to 200 DEG C, with The heating rate of 3～5 DEG C/min is heated to 820～980 DEG C, is incubated 0.5～3 hour.
Adhesive property is played in the addition of a small amount of water in preferred scheme, and beneficially raw material is compressing.
In preferred scheme, lead-zinc ore tailings, red mud, flyash and sintering aid powder are by sieving, and sieve takes granularity It is the powder of 100～300 mesh.
Compressing employing one side pressuring method shaping in preferred scheme, briquetting pressure is 15～20MPa.
In preferred scheme, the type of cooling is for stove cooling.
The technical advantage of the present invention and the Advantageous Effects bringing: through the discovery of inventor's numerous studies, by lead Zinc ore mine tailing, red mud and the reasonably combined use of three kinds of industrial solid waste residues of flyash, be particularly suitable for preparing foam Pottery.
1) lead-zinc ore tailings, red mud and flyash are compounded by suitable mass ratio so that it is in SiO2、 Al2O3Composition fully plays skeleton function in foamed ceramics, can give the excellent mechanical performance of foamed ceramics, Thermal property and chemical stability；And usual, SiO2And Al2O3Content is higher, then foamed ceramics intensity higher, Thermal coefficient of expansion is lower, chemical stability better, but its required sintering temperature is also high simultaneously, therefore, same When keep the relatively low sintering temperature of foamed ceramics and preferable performance, it is necessary to meet the conjunction between each industrial residue Reason proportioning.
2) these three solid slag contains a certain proportion of FeS2And CaCO3Deng.Temperature in the present invention program FeS is sintered under the conditions of degree2With the O in air2Reaction, generates SO2Gas, the CaCO in waste residue3It is decomposed into CaO and CO2Gas, fully meets foaming agent required in sintering process and requires, it is not necessary to additionally add foaming Agent.
3) CaO, MgO, Na containing in each raw slag material2O、K2The alkaline-earth metal such as O and alkali metal oxidation Thing is excellent sintering aid, can be substantially reduced the sintering temperature of material；Meanwhile, CaO, MgO, Na2O、 K2O and SiO2、Al2O3There is chemical reaction, generate silicate, aluminate melt, and then form glass phase, On the one hand, silicate, aluminate formation can be to Na+、K+Ion and heavy metal ion play " constraint " effect, During the use of material, these bound alkali metal ions and heavy metal ion are difficult to discharge, thus can Solve alkalization of soils and heavy metal ion pollution problem；On the other hand, the formation of glass phase again can be by gas bag Wrap up in and by radiation sealing.
4) P in raw slag material2O5、TiO2、Fe2O3, MnO etc. can participate in the composition of material, be not required to 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.
The technical advantage of the present invention in sum, brings technique effect excellent especially:
1st, taking full advantage of three kinds of industrial solid waste residues and preparing foamed ceramics, the total introduction volume of solid slag reaches 70～82%, it is achieved that the comprehensive utilization of solid slag, turn waste into wealth, produce bigger economic benefit.
2nd, preparation process condition is simple, and the sintering temperature of foamed ceramics is relatively low, only 820～980 DEG C.
3rd, the foamed ceramics of preparation is with Na6Ca2Al6Si6O24(SO4)2For principal crystalline phase, comprise Fe2O3, a small amount of CaSO4、Fe3O4、SiO2Mutually and glass phase, it has lightweight, high-strength, sound insulation, heat insulation, insulation, anti- Fire, do not produce the features such as secondary pollution；The porosity being embodied in foamed ceramics is up to 62.2～78.5%, Density 0.42～0.81g.cm-3, compression strength reaches 4.8～8.4MPa, and resistance to acids and bases is more than 98%.
Brief description
[Fig. 1] is the XRD of the foamed ceramics prepared by the embodiment of the present invention 7, and principal crystalline phase therein is Na6Ca2Al6Si6O24(SO4)2And Fe2O3, also a small amount of CaSO4、Fe3O4And SiO2Phase.
[Fig. 2] is the profile in kind of the foamed ceramics prepared by the embodiment of the present invention 7.
Specific embodiments
Below in conjunction with embodiment, present invention is described further, but the protection of the present invention should not limited with this Scope.
Embodiment 1
Various raw materials are sieved, takes powder between 100～300 mesh for the granularity, weigh by following mass percent And uniformly mix: lead-zinc ore tailings 10%, red mud 12%, flyash 48%, Boratex 30%, additional former The water of material gross weight 3%, mixes, makes batch；Batch is put in metal die at 18MPa Under be pressed into foamed ceramics base substrate, put in resistance furnace after being first at the uniform velocity warmed up to 200 DEG C with 2 DEG C/min, to arrive 4 DEG C/min is at the uniform velocity warmed up to 830 DEG C, naturally cools down after being incubated 0.5 hour.The volume density preparing foamed ceramics is 0.55g/cm3, the porosity is 62.2%, and compression strength is 5.7MPa, and acid resistance is 98.6%, and alkali resistance is 99.1%.
Embodiment 2
Various raw materials are sieved, takes powder between 100～300 mesh for the granularity, weigh by following mass percent And uniformly mix: lead-zinc ore tailings 10%, red mud 11%, flyash 53%, Boratex 26%, additional former The water of material gross weight 3%, mixes, makes batch；Batch is put in metal die at 18MPa Under be pressed into foamed ceramics base substrate, put in resistance furnace after being first at the uniform velocity warmed up to 200 DEG C with 3 DEG C/min, to arrive 4 DEG C/min is at the uniform velocity warmed up to 860 DEG C, naturally cools down after being incubated 0.5 hour.The volume density preparing foamed ceramics is 0.59g/cm3, the porosity is 72.1%, and compression strength is 5.5MPa, and acid resistance is 98.7%, and alkali resistance is 99.3%.
Embodiment 3
Various raw materials are sieved, takes powder between 100～300 mesh for the granularity, weigh by following mass percent And uniformly mix: lead-zinc ore tailings 13%, red mud 12%, flyash 51%, Boratex 24%, additional former The water of material gross weight 3%, mixes, makes batch；Batch is put in metal die at 18MPa Under be pressed into foamed ceramics base substrate, put in resistance furnace after being first at the uniform velocity warmed up to 200 DEG C with 3 DEG C/min, to arrive 4 DEG C/min is at the uniform velocity warmed up to 850 DEG C, naturally cools down after being incubated 0.5 hour.The volume density preparing foamed ceramics is 0.42g/cm3, the porosity is 78.3%, and compression strength is 4.8MPa, and acid resistance is 98.5%, and alkali resistance is 99.1%.
Embodiment 4
Various raw materials are sieved, takes powder between 100～300 mesh for the granularity, weigh by following mass percent And uniformly mix: lead-zinc ore tailings 15%, red mud 13%, flyash 52%, Boratex 20%, additional former The water of material gross weight 4%, mixes, makes batch；Batch is put in metal die at 18MPa Under be pressed into foamed ceramics base substrate, put in resistance furnace after being first at the uniform velocity warmed up to 200 DEG C with 3 DEG C/min, to arrive 5 DEG C/min is at the uniform velocity warmed up to 980 DEG C, naturally cools down after being incubated 1 hour.The volume density preparing foamed ceramics is 0.81g/cm3, the porosity is 74.2%, and compression strength is 8.4MPa, and acid resistance is 98.6%, and alkali resistance is 99.1%.
Embodiment 5
Various raw materials are sieved, takes powder between 100～300 mesh for the granularity, weigh by following mass percent And uniformly mix: lead-zinc ore tailings 15%, red mud 11%, flyash 44%, Boratex 30%, additional former The water of material gross weight 3%, mixes, makes batch；Batch is put in metal die at 18MPa Under be pressed into foamed ceramics base substrate, put in resistance furnace after being first at the uniform velocity warmed up to 200 DEG C with 3 DEG C/min, to arrive 3 DEG C/min is at the uniform velocity warmed up to 820 DEG C, naturally cools down after being incubated 0.5 hour.The volume density preparing foamed ceramics is 0.62g/cm3, the porosity is 68.5%, and compression strength is 6.3MPa, and acid resistance is 98.4%, and alkali resistance is 99.2%.
Embodiment 6
Various raw materials are sieved, takes powder between 100～300 mesh for the granularity, weigh by following mass percent And uniformly mix: lead-zinc ore tailings 18%, red mud 13%, flyash 47%, Boratex 22%, additional former The water of material gross weight 4%, mixes, makes batch；Batch is put in metal die at 18MPa Under be pressed into foamed ceramics base substrate, put in resistance furnace after being first at the uniform velocity warmed up to 200 DEG C with 3 DEG C/min, to arrive 5 DEG C/min is at the uniform velocity warmed up to 975 DEG C, naturally cools down after being incubated 1 hour.The volume density preparing foamed ceramics is 0.72g/cm3, the porosity is 71.2%, and compression strength is 7.4MPa, and acid resistance is 98.3%, and alkali resistance is 99.1%.
Embodiment 7
Various raw materials are sieved, takes powder between 100～300 mesh for the granularity and weigh simultaneously by following mass percent Uniformly mixing: lead-zinc ore tailings 20%, red mud 12%, flyash 48%, Boratex 20%, additional raw material The water of gross weight 4%, mixes, and makes batch；Batch is put in metal die at 18MPa Under be pressed into foamed ceramics base substrate, put in resistance furnace after being first at the uniform velocity warmed up to 200 DEG C with 3 DEG C/min, to arrive 5 DEG C/min is at the uniform velocity warmed up to 980 DEG C, naturally cools down after being incubated 1 hour.The volume density preparing foamed ceramics is 0.68g/cm3, the porosity is 75.1%, and compression strength is 7.8MPa, and acid resistance is 98.4%, and alkali resistance is 99.3%.
Embodiment 8
Various raw materials are sieved, takes powder between 100～300 mesh for the granularity, weigh by following mass percent And uniformly mix: lead-zinc ore tailings 20%, red mud 12%, flyash 48%, Boratex 20%, additional former The water of material gross weight 4%, mixes, makes batch；Batch is put in metal die at 18MPa Under be pressed into foamed ceramics base substrate, put in resistance furnace after being first at the uniform velocity warmed up to 200 DEG C with 3 DEG C/min, to arrive 5 DEG C/min is at the uniform velocity warmed up to 980 DEG C, naturally cools down after being incubated 3 hours.The volume density preparing foamed ceramics is 0.71g/cm3, the porosity is 78.5%, and compression strength is 7.1MPa, and acid resistance is 98.4%, and alkali resistance is 99.2%.
Embodiment 9
Various raw materials are sieved, takes powder between 200～300 mesh for the granularity, weigh by following mass percent And uniformly mix: lead-zinc ore tailings 21%, red mud 16%, flyash 43%, Boratex 20%, additional former The water of material gross weight 4%, mixes, makes batch；Batch is put in metal die at 18MPa Under be pressed into foamed ceramics base substrate, put in resistance furnace after being first at the uniform velocity warmed up to 200 DEG C with 3 DEG C/min, to arrive 5 DEG C/min is at the uniform velocity warmed up to 980 DEG C, naturally cools down after being incubated 1 hour.The volume density preparing foamed ceramics is 0.75g/cm3, the porosity is 70.7%, and compression strength is 6.9MPa, and acid resistance is 98.2%, and alkali resistance is 99.2%.
Embodiment 10
Various raw materials are sieved, takes powder between 200～300 mesh for the granularity, weigh by following mass percent And uniformly mix: lead-zinc ore tailings 22%, red mud 9%, flyash 51%, Boratex 18%, additional raw material The water of gross weight 5%, mixes, and makes batch；Batch is put in metal die at 18MPa Under be pressed into foamed ceramics base substrate, put in resistance furnace after being first at the uniform velocity warmed up to 200 DEG C with 3 DEG C/min, to arrive 5 DEG C/min is at the uniform velocity warmed up to 950 DEG C, naturally cools down after being incubated 1 hour.The volume density preparing foamed ceramics is 0.77g/cm3, the porosity is 65.8%, and compression strength is 7.9MPa, and acid resistance is 98.2%, and alkali resistance is 99.1%.
Embodiment 11
Various raw materials are sieved, takes powder between 200 mesh～300 mesh for the granularity, by following mass percent Weigh and uniformly mix: lead-zinc ore tailings 24%, red mud 10%, flyash 46%, Boratex 20%, outward Add the water of raw material gross weight 4%, mix, make batch；Batch is put in metal die It is 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, naturally cool down after being incubated 1 hour.The body preparing foamed ceramics is close Degree is 0.81g/cm3, the porosity is 63.3%, and compression strength is 7.5MPa, and acid resistance is 98.1%, alkaline-resisting Property is 99.1%.
The performance parameter index of the foamed ceramics of table 1 embodiment 1～11 preparation
In all embodiments, the incompressible intensity of sample is according to GB/T 1964-1996 " porous ceramics compressive strength survey Method for testing " record.
In all embodiments sample acid resistance and alkali resistance according to GB/T 1970-1996 " porous ceramics is acidproof, Alkali corrosion resistance method for testing performance " record.

Claims (5)

1. lead-zinc ore tailings-red mud-fly ash base foamed ceramics, it is characterised in that 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 aid 18～30%；
Described sintering aid is alkali metal oxide, alkali metal salt compounds, alkaline earth oxide, at least one in alkaline-earth metal salt compounds.
2. lead-zinc ore tailings-red mud-fly ash base foamed ceramics according to claim 1, it is characterised in that described sintering aid is boric acid sodium salt.
3. the preparation method of the lead-zinc ore tailings-red mud-fly ash base foamed ceramics described in claim 1 or 2, it is characterized in that, after lead-zinc ore tailings, red mud, flyash and sintering aid powder are sieved, the water of additional raw material gross weight 3～5%, mix, prepare batch；After die-filling for gained batch, compressing, obtain foamed ceramics base substrate；Gained foamed ceramics base substrate is placed in stove, intensification is dried and sinters, before 200 DEG C, with the heating rate heating of 2～3 DEG C/min, ceramic body is dried, it after temperature is increased to 200 DEG C, is heated to 820～980 DEG C with the heating rate of 3～5 DEG C/min, be incubated 0.5～3 hour, cooling, obtains foamed ceramics.
4. the preparation method of lead-zinc ore tailings-red mud-fly ash base foamed ceramics according to claim 3, it is characterised in that lead-zinc ore tailings, red mud, flyash and sintering aid powder are by sieving, and sieve takes the powder that granularity is 100～300 mesh.
5. the preparation method of lead-zinc ore tailings-red mud-fly ash base foamed ceramics according to claim 3, it is characterised in that during compressing, pressure size is 15～20MPa.
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CN108395271A (en) * 2018-03-28 2018-08-14 中南大学 Full waste residue foamed ceramics of coal gangue-fly ash-silica sand tailing system and preparation method thereof

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