CN103467122A - Novel porous mullite lightweight aggregate and preparation method thereof - Google Patents
Novel porous mullite lightweight aggregate and preparation method thereof Download PDFInfo
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- CN103467122A CN103467122A CN 201310392953 CN201310392953A CN103467122A CN 103467122 A CN103467122 A CN 103467122A CN 201310392953 CN201310392953 CN 201310392953 CN 201310392953 A CN201310392953 A CN 201310392953A CN 103467122 A CN103467122 A CN 103467122A
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Abstract
The invention particularly relates to a novel porous mullite lightweight aggregate and a preparation method thereof. The technical scheme is as follows: the preparation method comprises the following steps: by using 50-90 wt% of aluminum silicon fine powder and 10-50 wt% of clay powder as raw materials, adding 5-15 wt% of binder and 15-25 wt% of water, carrying out extrusion forming to obtain a granular biscuit, baking the granular biscuit in a constant-temperature 80-200 DEG C environment for 24-48 hours, heating to 1000-1300 DEG C, and keeping the temperature for 2-10 hours to obtain the novel porous mullite lightweight aggregate. The preparation method has the characteristics of low production cost, simple technique, resource saving and environment friendliness; and the obtained novel aluminum silicon lightweight aggregate has the advantages of small average pore size, uniform pore size distribution, low volume density, high strength and small reburning linear variation, and can be directly used in a casting material system.
Description
Technical field:
The invention belongs to the technical field for preparing aglite, be specifically related to a kind of method of utilizing the ceramic tile waste material to prepare aglite.
Background technology:
Be accompanied by the bulk deposition with waste that consumes excessively of Nonrenewable energy resources, resources conservation and environmental friendliness have become the two principal themes in epoch.The accumulation of solid waste is very serious, is unfavorable for the Sustainable development of resource.Ceramic tile is the ordinary articles of industry and daily life, and the discarded ceramic tile after using can't be recycled utilization, and reserves are with the rate increase in tens thousand of tons of every year., how correctly to process the ceramic tile waste material and it is turned waste into wealth and becomes problem demanding prompt solution as the present situation on mountain for domestic industry and daily ceramic tile waste from stacking.
Till present stage, higher for the preparation of the cost of material of fire-resistant light aggregate, and complex manufacturing technology, energy consumption is high, makes the development of fire-resistant light aggregate be restricted.The present invention adopts the method for squeezing the mud moulding to utilize the tile powder waste material to prepare a kind of novel porous mullite light-weight refractory aggregate, desired raw material is with low cost, production technique is simple, energy consumption is low, and crowded mud moulding can not can destroy aggregate microvoid structure originally, and make the aggregate of gained in conjunction with tightr, properties gets a promotion, and has good development prospect.
At present, discarded tile powder still is not fully utilized, to discard fire-resistant light aggregate that the tile powder processability is good still in the vacancy state." a kind of high-purity high-strength light-weight mullite aggregate " be patented technology (CN101817688A), disclose that to take the natural silica of 20～30wt% and the commercial alumina of 70～80wt% be raw material, the carbonaceous of additional 25wt% is burnt lost article, through wet method altogether mill, extrusion molding, calcining and fragmentation to make volume density be 1.1～1.3g/cm
3mullite lightweight aggregate.The defect of the method is mainly reflected in: the cost of (1) raw material is high; (2) production technique is more complicated, and energy consumption is high; (3) fragmentation has damaged the weave construction of aggregate, and product granularity is wayward.
Summary of the invention:
The purpose of this invention is to provide a kind ofly can economize on resources, protection of the environment, the tile powder waste material that utilizes that reduces costs prepare the method for quality refractory aglite.By the prepared novel porous mullite lightweight aggregate mean pore size of this method little and even aperture distribution, volume density is little, intensity is high and reheat linear change is little.
For achieving the above object, the technical solution adopted in the present invention is: first take the alumina-silica fine powder of 50～90wt% and the clay powder of 10～50wt% is raw material, the water of the wedding agent of additional 5～15wt% and 15～25wt% again, make granular biscuit through squeezing the mud moulding, be positioned in the environment of 80～200 ℃ of constant temperature after toasting 24～48h and be warming up to 1000～1300 ℃, insulation 2～10h, obtain the porous mullite aglite.
In technique scheme: the Na in discarded ceramic powder
2o content≤0.5wt%, K
2o content≤2.5wt%; Particle diameter≤the 0.074mm of waste ceramic powder, the Al of waste ceramic powder
2o
3content>=40wt%, SiO
2content>=45wt%; The Al of clay powder
2o
3content>=42wt%, the particle diameter≤0.088mm of clay powder; Pore-forming material is a kind of in polystyrene spheres, straw, common paper fiber and rice husk; Wedding agent is a kind of in Walocel MT 20.000PV, aluminium dihydrogen phosphate, polyvinyl alcohol and dextrin.
Owing to adopting technique scheme, the present invention's main raw material used is current bulk deposition and the discarded ceramic tile powder of not being fully used, and turns waste into wealth, and has not only slowed down environmental stress and has also saved the expense of processing a large amount of waste ceramic powders; Production technique is simple, and the aggregate that can be used as lightening casting material after raw material is squeezed to mud moulding drying and calcines is used; Prepared novel porous mullite lightweight aggregate Al
2o
3content is 40～50wt%, and pore size distribution mainly is distributed in below 20 μ m, concentrates and is distributed between 5～8 μ m, and volume density is 0.8～1.2g/cm
3, apparent porosity is 45～65%, reheat linear change ± 0.5%, and cold crushing strength is 15～25MPa.
Therefore, the present invention has production cost and hangs down and the simple characteristics of technique, not only can realize the high efficiente callback of solid waste, also effectively reduce the production cost of refractory aggregate, little and the even aperture distribution of the novel porous mullite lightweight aggregate mean pore size of gained, volume density is little, intensity is high and reheat linear change is little, can be directly used in the mould material system.
Embodiment:
Below in conjunction with embodiment, the present invention will be further described, not limiting the scope of the invention.
For avoiding repetition, first by this embodiment, involved relevant technologies improve parameter unification is described below: the Na in discarded ceramic powder
2o content≤0.5wt%, K
2o content≤2.5wt%; Particle diameter≤the 0.074mm of waste ceramic powder, the Al of waste ceramic powder
2o
3content>=40wt%, SiO
2content>=45wt%; The Al of clay powder
2o
3content>=40wt%, the particle diameter≤0.088mm of clay powder.In embodiment, repeat no more.
Embodiment 1
A kind of novel porous mullite lightweight aggregate and preparation method thereof.First take the waste ceramic powder of 50～60wt% and the clay powder of 40～50wt% is raw material, the polyvinyl alcohol of the common paper fiber of the water of additional described raw material 10～12wt%, 25～35wt%, 3.5～6wt% and the aluminium dihydrogen phosphate of 4.5～6wt% again, squeeze the mud moulding, seasoning after evenly mixing.
Granular biscuit after seasoning is toasted to 5～8h under 80～110 ℃ of conditions, then be warming up to 1000～1300 ℃, be incubated 4～8h and obtain the porous mullite aglite.
The Al of the alumina-silica aglite that the present embodiment is prepared
2o
3content is 35～40wt%, and volume density is 0.8～0.9g/cm
3, apparent porosity is 55～60%, cold crushing strength 16.0～19.0MPa.
Embodiment 2
A kind of novel porous mullite lightweight aggregate and preparation method thereof.First take the waste ceramic powder of 60～70wt% and the clay powder of 30～40wt% is raw material, the polyvinyl alcohol of the common paper fiber of the water of additional described raw material 13～18wt%, 25～35wt%, 1.5～3.0wt% and the aluminium dihydrogen phosphate of 3.5～4.0wt% again, squeeze the mud moulding, seasoning after evenly mixing.
Granular biscuit after seasoning is toasted to 4～6h under 180～200 ℃ of conditions, then be warming up to 1000～1300 ℃, obtain the porous mullite aglite after being incubated 2～6h.
The Al of the alumina-silica aglite that the present embodiment is prepared
2o
3content is 37～40wt%, and volume density is 0.90～1.0g/cm
3, apparent porosity is 45～50%, cold crushing strength 15.0～17.0MPa.
Embodiment 3
A kind of novel porous mullite lightweight aggregate and preparation method thereof.First take the waste ceramic powder of 70～80wt% and the clay powder of 20～30wt% is raw material, the aluminium dihydrogen phosphate of the Walocel MT 20.000PV of the straw of the water of additional described raw material 12～15wt%, 20～25wt%, 2.0～3.0wt% and 4.5～5.0wt% again, squeeze the mud moulding, seasoning after evenly mixing.
Granular biscuit after seasoning is toasted to 20～24h under 100～120 ℃ of conditions, then be warming up to 1000～1300 ℃, obtain the porous mullite aglite after being incubated 3～5h.
The Al of the alumina-silica aglite that the present embodiment is prepared
2o
3content is 38～42wt%, and volume density is 1.0～1.1g/cm
3, apparent porosity is 48～53%, cold crushing strength 18.0～20.5MPa.
Embodiment 4
A kind of novel porous mullite lightweight aggregate and preparation method thereof.First take the ceramic waste material of 80～90wt% and the clay of 10～20wt% is raw material, the aluminium dihydrogen phosphate of the dextrin of the polystyrene spheres of the water of additional described raw material 13～15wt%, 20～25wt%, 2.0～3.0wt% and 4.5～5.0wt% again, squeeze the mud moulding, seasoning after evenly mixing.
Granular biscuit after seasoning is toasted to 12～24h under 100～120 ℃ of conditions, then be warming up to 1000～1300 ℃, obtain the porous mullite aglite after being incubated 6～10h.
The Al of the alumina-silica aglite that the present embodiment is prepared
2o
3content is 40～43wt%, and volume density is 0.95～1.05g/cm
3, apparent porosity is 50～55%, cold crushing strength 20.0～23.0MPa.
Embodiment 5
A kind of novel porous mullite lightweight aggregate and preparation method thereof.First take the waste ceramic powder of 80～85wt% and the clay powder of 15～20wt% is raw material, the water of more additional described raw material 12～20wt%, the polystyrene spheres of 30～35wt%, the polyvinyl alcohol of 6.0～8.0wt%, after evenly mixing, squeezes the mud moulding, seasoning.
Granular biscuit after seasoning is toasted to 20～24h under 80～110 ℃ of conditions, then be warming up to 1200～1300 ℃, obtain the porous mullite aglite after being incubated 3～6h.
The Al of the alumina-silica aglite that the present embodiment is prepared
2o
3content is 39～40wt%, and volume density is 0.85～0.95g/cm
3, apparent porosity is 60～65%, cold crushing strength 17.5～19.5MPa.
Embodiment 6
A kind of novel porous mullite lightweight aggregate and preparation method thereof.First take the waste ceramic powder of 70～75wt% and the clay powder of 25～30wt% is raw material, the Walocel MT 20.000PV of the polyvinyl alcohol of the polystyrene spheres of the water of additional described raw material 12～16wt%, 10～15wt%, 4.0～6.0wt% and 2.0～3.0wt% again, mix rear crowded mud moulding, seasoning.
Granular biscuit after seasoning is toasted to 10～12h under 150～180 ℃ of conditions, then be warming up to 1100～1250 ℃, be incubated 3～6h, obtain the porous mullite aglite after fragmentation.
The Al of the alumina-silica aglite that the present embodiment is prepared
2o
3content is 38～41wt%, and volume density is 1.05～1.15g/cm
3, apparent porosity is 57～63%, cold crushing strength 19.0～22.5MPa.
Embodiment 7
A kind of novel porous mullite lightweight aggregate and preparation method thereof.First take the waste ceramic powder of 75～85wt% and the clay powder of 15～25wt% is raw material, the dextrin of the polyvinyl alcohol of the polystyrene spheres of the water of additional described raw material 15～20wt%, 15～25wt%, 5.0～7.0wt% and 1.0～1.5wt% again, mix rear crowded mud moulding, seasoning.
Granular biscuit after seasoning is toasted to 18～20h under 110～150 ℃ of conditions, then be warming up to 1200～1300 ℃, be incubated 3～6h, obtain the porous mullite aglite after fragmentation.
The Al of the alumina-silica aglite that the present embodiment is prepared
2o
3content is 39～42wt%, and volume density is 0.9～1.1g/cm
3, apparent porosity is 45～50%, cold crushing strength 20.0～25.0MPa.
The solid that this specific embodiment main raw material used is current bulk deposition is discarded ceramic tile, alleviates environmental stress, turns waste into wealth simultaneously; Production technique is simple, and pressure forming after mixing obtains the aggregate that can be used as lightening casting material and use after calcining, fragmentation; Prepared novel porous mullite lightweight aggregate Al
2o
3content is 35～45wt%, and pore size distribution mainly is distributed in below 20 μ m, concentrates and is distributed between 5～8 μ m, and volume density is 0.8～1.2g/cm
3, apparent porosity is 45～65%, reheat linear change ± 0.5%, and cold crushing strength is 15～30MPa.
Therefore, the present invention has lower production cost and the simple characteristics of technique, have resources conservation and eco-friendly characteristic concurrently, the little and even aperture distribution of the siliceous aglite mean pore size of gained novel aluminum, volume density is little, intensity is high and reheat linear change is little, can be directly used in the mould material system simultaneously.
Claims (6)
1. the preparation method of an aglite, it is characterized in that first a kind of alumina-silica fine powder evenly being mixed with the ratio of 1:1～9:1 with clay, the wedding agent of additional 5～15wt% and the water of 15～25wt%, make granular biscuit through squeezing the mud moulding, burn till under the condition of 1000～1300 ℃ after 80～200 ℃ of dryings, obtain the porous mullite aglite after being incubated 2～10h.
2. the preparation method of aglite according to claim 1, is characterized in that described alumina-silica fine powder obtains by tile corner material, waste material fragmentation, and particle diameter all is less than 0.074mm.
3. the preparation method of aglite according to claim 1 and 2, is characterized in that the main chemical compositions of described alumina-silica fine powder is: Al
2o
3content>=40wt%, SiO
2content>=45wt%, Na
2o content≤0.5wt%, K
2o content≤2.5wt%.
4. the preparation method of aglite according to claim 1, is characterized in that described pore-forming material is a kind of in polystyrene spheres, straw, common paper fiber and rice husk.
5. the preparation method of aglite according to claim 1, is characterized in that described wedding agent is more than a kind of the reaching in water glass, aluminium dihydrogen phosphate, polyvinyl alcohol and dextrin.
6. according to the prepared aglite of preparation method of the described aglite of any one in claim 1～5.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108610088A (en) * | 2018-06-04 | 2018-10-02 | 武汉科技大学 | A kind of alumina-mullite porous heat-insulating ceramics and preparation method thereof |
| CN111978090A (en) * | 2020-09-04 | 2020-11-24 | 沈阳绿冶新材科技有限公司 | Aluminum-silicon light refractory castable and preparation method thereof |
| CN114014691A (en) * | 2021-12-15 | 2022-02-08 | 无锡远能耐火材料有限公司 | High-alumina heat-insulating brick and preparation method thereof |
| CN114685180A (en) * | 2022-03-22 | 2022-07-01 | 赵月娥 | Porous ceramic material and preparation method thereof |
-
2013
- 2013-09-02 CN CN 201310392953 patent/CN103467122A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108610088A (en) * | 2018-06-04 | 2018-10-02 | 武汉科技大学 | A kind of alumina-mullite porous heat-insulating ceramics and preparation method thereof |
| CN111978090A (en) * | 2020-09-04 | 2020-11-24 | 沈阳绿冶新材科技有限公司 | Aluminum-silicon light refractory castable and preparation method thereof |
| CN111978090B (en) * | 2020-09-04 | 2021-05-14 | 沈阳绿冶新材科技有限公司 | Aluminum-silicon light refractory castable and preparation method thereof |
| CN114014691A (en) * | 2021-12-15 | 2022-02-08 | 无锡远能耐火材料有限公司 | High-alumina heat-insulating brick and preparation method thereof |
| CN114685180A (en) * | 2022-03-22 | 2022-07-01 | 赵月娥 | Porous ceramic material and preparation method thereof |
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Application publication date: 20131225 |