CN104909817A - Magnesian porous heat insulating material and preparation method thereof - Google Patents
Magnesian porous heat insulating material and preparation method thereof Download PDFInfo
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- CN104909817A CN104909817A CN201510310716.6A CN201510310716A CN104909817A CN 104909817 A CN104909817 A CN 104909817A CN 201510310716 A CN201510310716 A CN 201510310716A CN 104909817 A CN104909817 A CN 104909817A
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Abstract
The invention belongs to the technical field of preparation of heat insulating materials and particularly relates to a magnesian porous heat insulating material and a preparation method thereof. The magnesian porous heat insulating material is prepared from magnesite flotation tailings, fused magnesite, a foaming agent, a foam stabilizer, a dispersant, a water reducer, a binder, an additive and distilled water which are taken as raw materials. The preparation method comprises the following steps: mulling and foaming the raw materials; and then rapidly molding by casting, drying and sintering. According to the magnesian porous heat insulating material and the preparation method thereof, the required raw materials are low in price, and the technical process is simple; during a process of pre-forming foam suspension, the foaming agent and foam stabilizer are selected to be compounded for use, so that foams in a slurry are uniformly distributed and can exist stably, and the dimensions and sizes of pores are controllable and can achieve a micrometer level and even a nanometer level.
Description
Technical field
The invention belongs to lagging material preparing technical field, be specifically related to magnesia porous insulation material and preparation method thereof.
Background technology
Porous insulation material refers to that a class void content is high, volume density is low, thermal conductivity is low and hot-fluid is had to the cellular solid of obvious impedance, is widely used in the aspects such as building material field, electromagnetic sensor, support of the catalyst and thermal isolation.Current porous insulation material mainly contains siliceous, corundum, mullite and silicon carbide etc., very few to magnesia porous material research.But magnesia porous insulation material not only thermal conductivity is low, and refractoriness is high, good thermal shock stability, alkaline erosion ability is strong, chemical stability good, is adapted to Hightemperature Kiln Furniture alkali attack sites and liner, is important heat-insulating heat-preserving material.
The preparation method of current porous insulation material has: hollow ball molding bonded method, pre-buried weighting material after-flame method, foaming, sol-gel method and gel injection molding and forming technology, not only production process is simple for the porous material wherein prepared with foaming, and pore size and size controlled, mostly be preparation and production that sealed porosity is widely used in all kinds of lagging material.But because foam is in a kind of polydisperse metastable condition, in slip, there will be floating, the wild effect such as even to break of growing up.
Summary of the invention
For above-mentioned technical problem, the invention provides a kind of magnesia porous insulation material with the low foam stabilization of thermal conductivity.Concrete technical scheme is:
Magnesia porous insulation material, is obtained by following methods:
(1) raw material is according to parts by weight, magnesite flotation tailings 40 ~ 60 parts, electrosmelted magnesite clinker 20 ~ 30 parts, whipping agent 1 ~ 10 part, suds-stabilizing agent 2 ~ 8 parts, dispersion agent 0.1 ~ 0.3 part, water reducer 1 ~ 3 part, bonding agent 2 ~ 4 parts, additive 1-5 part, distilled water 7 ~ 20 parts;
To mix foaming, stir 30min with 1200r/min speed in process of mixing, obtain prefabricated slip;
(2) curing molding in prefabricated slip Quick pouring to 150mm × 150mm × 150mm mould;
(3) shaping sample maintenance 24h under 60 DEG C of conditions, base substrate dry 24h under 110 DEG C of conditions after the demoulding, dried base substrate is incubated 3h and burns till under 1300 DEG C of conditions, obtained magnesia porous insulation material.
The specific surface area of magnesite flotation tailings is 1.25m
2/ g, median size is 16.75 μm.
Electrosmelted magnesite clinker particle diameter is 200 orders.
Whipping agent is one or more mixtures in sodium laurylsulfonate, Sodium dodecylbenzene sulfonate, Cellmic C 121 or nonionogenic tenside.
Wherein, suds-stabilizing agent is dextrin.
Dispersion agent is Trisodium Citrate.
Water reducer is Sodium hexametaphosphate 99 or wooden calcium powder.
Bonding agent is Magnesium dichloride hexahydrate.
Additive is α-Al
2o
3powder, median size is 200 orders.
Whipping agent and the composite use of suds-stabilizing agent, suds-stabilizing agent is gelatin substance, its molecule can produce larger internal friction when the aqueous solution flows, soltion viscosity is caused to raise, and then adding liquid film surface strength, the liquid that liquid film is closed on not easily is discharged, and the speed that thickness of liquid film diminishes is slower, delay the time of liquid-sheet disintegration, add the stability of foam.
Magnesia porous insulation material provided by the invention and preparation method thereof, desired raw material is cheap, technological process is simple, with the magnesite resource of the southern regional enrichment of the Liao Dynasty for advantage, select the mine tailing of magnesite flotation to be main raw material, reclaim waste resource and be used by reasonable manner, preparing the needs both having met energy development strategy, make again the goods of resource rational utilization, realize the Sustainable development of the energy.Select whipping agent and the composite use of suds-stabilizing agent that the bubble in slip can be made to be uniformly distributed and stable existence during preformed foam suspension, make pore size and size controlled, and reach micron even Nano grade.
Embodiment
Below in conjunction with embodiment, the present invention is illustrated, but given embodiment does not constitute any limitation the present invention.
In following examples, electrosmelted magnesite clinker and α-Al
2o
3the median size of powder is 200 orders.
embodiment 1
50 parts of magnesite flotation tailingss and 25 parts of electrosmelted magnesite clinkers are poured in stirred pot, add 3 parts of sodium laurylsulfonates, 6 parts of dextrin, 0.1 part of Trisodium Citrate, 2 parts of Sodium hexametaphosphate 99s, 2.4 parts of MgCl
26H
2o, 4.5 parts of α-Al
2o
3with 7 parts of distilled water, foaming of mixing, system of mixing stirs 30min by 1200r/min.After completing slurry preparation section, Quick pouring is curing molding in 150mm × 150mm × 150mm mould to size.Shaping rear sample maintenance 24h under 60 DEG C of conditions, base substrate dry 24h under 110 DEG C of conditions after the demoulding, dried base substrate burns till at 1300 DEG C of insulation 3h, obtained magnesia porous insulation material.
Magnesia porous thermal insulating goods prepared by this embodiment are after testing: volume density 0.98g/cm
3, void content 70.21%, thermal conductivity 0.23W/mK.
embodiment 2
50 parts of magnesite flotation tailingss and 20 parts of electrosmelted magnesite clinkers are poured in stirred pot, add 5 parts of sodium laurylsulfonates, 8 parts of dextrin, 0.2 part of Trisodium Citrate, 2.5 parts of Sodium hexametaphosphate 99s, 3.3 parts of MgCl
26H
2o, 3 parts of α-Al
2o
3with additional 8 parts of distilled water, foaming of mixing, system of mixing stirs 30min by 1200r/min.After completing slurry preparation section, Quick pouring is curing molding in 150mm × 150mm × 150mm mould to size.Shaping rear sample maintenance 24h under 60 DEG C of conditions, base substrate dry 24h under 110 DEG C of conditions after the demoulding, dried base substrate burns till at 1300 DEG C of insulation 3h, obtained magnesia porous insulation material.
Magnesia porous thermal insulating goods prepared by this embodiment are after testing: volume density 0.90g/cm
3, void content 74.60%, thermal conductivity 0.18W/mK.
embodiment 3
40 parts of magnesite flotation tailingss and 30 parts of electrosmelted magnesite clinkers are poured in stirred pot, add 2 parts of sodium laurylsulfonates and 3 parts of Cellmic C 121s, two kinds of whipping agents, 8 parts of dextrin, 0.2 part of Trisodium Citrate, 2 parts of Sodium hexametaphosphate 99s, 2.8 parts of MgCl
26H
2o, 2 parts of α-Al
2o
3with 10 parts of distilled water, foaming of mixing, system of mixing stirs 30min by 1200r/min.After completing slurry preparation section, Quick pouring is curing molding in 150mm × 150mm × 150mm mould to size.Shaping rear sample maintenance 24h under 60 DEG C of conditions, base substrate dry 24h under 110 DEG C of conditions after the demoulding, dried base substrate burns till at 1300 DEG C of insulation 3h, obtained magnesia porous insulation material.
Magnesia porous thermal insulating goods prepared by this embodiment are after testing: volume density 0.91g/cm
3, void content 72.13%, thermal conductivity 0.19W/mK.
embodiment 4
60 parts of magnesite flotation tailingss and 20 parts of electrosmelted magnesite clinkers are poured in stirred pot, add 1 part of Sodium dodecylbenzene sulfonate and 2 parts of Cellmic C 121s, two kinds of whipping agents, 4 parts of dextrin, 0.3 part of Trisodium Citrate, 1 part of Sodium hexametaphosphate 99,2.7 parts of MgCl
26H
2o, 1 part of α-Al
2o
3with 8 parts of distilled water, foaming of mixing, system of mixing stirs 30min by 1200r/min.After completing slurry preparation section, Quick pouring is curing molding in 150mm × 150mm × 150mm mould to size.Shaping rear sample maintenance 24h under 60 DEG C of conditions, base substrate dry 24h under 110 DEG C of conditions after the demoulding, dried base substrate burns till at 1300 DEG C of insulation 3h, obtained magnesia porous insulation material.
Magnesia porous thermal insulating goods prepared by this embodiment are after testing: volume density 0.87g/cm
3, void content 75.32%, thermal conductivity 0.16W/mK.
embodiment 5
55 parts of magnesite flotation tailingss and 25 parts of electrosmelted magnesite clinkers are poured in stirred pot, add 5 parts of Cellmic C 121s and 5 parts of non-ionic polyacrylamides, 2 parts of dextrin, 0.3 part of Trisodium Citrate, 3 parts of wooden calcium powders, 4 parts of MgCl
26H
2o, 5 parts of α-Al
2o
3with 20 parts of distilled water, foaming of mixing, system of mixing stirs 30min by 1200r/min.After completing slurry preparation section, Quick pouring is curing molding in 150mm × 150mm × 150mm mould to size.Shaping rear sample maintenance 24h under 60 DEG C of conditions, base substrate dry 24h under 110 DEG C of conditions after the demoulding, dried base substrate burns till at 1300 DEG C of insulation 3h, obtained magnesia porous insulation material.
Magnesia porous thermal insulating goods prepared by this embodiment are after testing: volume density 0.89g/cm
3, void content 74.65%, thermal conductivity 0.21W/mK.
Claims (9)
1. magnesia porous insulation material, is characterized in that, is obtained by following methods:
(1) raw material is according to parts by weight, magnesite flotation tailings 40 ~ 60 parts, electrosmelted magnesite clinker 20 ~ 30 parts, whipping agent 1 ~ 10 part, suds-stabilizing agent 2 ~ 8 parts, dispersion agent 0.1 ~ 0.3 part, water reducer 1 ~ 3 part, bonding agent 2 ~ 4 parts, additive 1-5 part, distilled water 7 ~ 20 parts;
To mix foaming, stir 30min with 1200r/min speed in process of mixing, obtain prefabricated slip;
(2) curing molding in prefabricated slip Quick pouring to 150mm × 150mm × 150mm mould;
(3) shaping sample maintenance 24h under 60 DEG C of conditions, base substrate dry 24h under 110 DEG C of conditions after the demoulding, dried base substrate is incubated 3h and burns till under 1300 DEG C of conditions, obtained magnesia porous insulation material.
2. magnesia porous insulation material according to claim 1, is characterized in that, the specific surface area of described magnesite flotation tailings is 1.25m
2/ g, particle diameter is 16.75 μm.
3. magnesia porous insulation material according to claim 1, is characterized in that, described electrosmelted magnesite clinker particle diameter is 200 orders.
4. magnesia porous insulation material according to claim 1, is characterized in that, described whipping agent is one or more mixtures in sodium laurylsulfonate, Sodium dodecylbenzene sulfonate, Cellmic C 121 or nonionogenic tenside.
5. magnesia porous insulation material according to claim 1, is characterized in that, described suds-stabilizing agent is dextrin.
6. magnesia porous insulation material according to claim 1, is characterized in that, described dispersion agent is Trisodium Citrate.
7. magnesia porous insulation material according to claim 1, is characterized in that, described water reducer is Sodium hexametaphosphate 99 or wooden calcium powder.
8. magnesia porous insulation material according to claim 1, is characterized in that, described bonding agent is Magnesium dichloride hexahydrate.
9. magnesia porous insulation material according to claim 1, is characterized in that, described additive is α-Al
2o
3powder, median size is 200 orders.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105237005A (en) * | 2015-10-21 | 2016-01-13 | 长兴中建耐火材料科技有限公司 | Highly-water-resistant light refractory aggregate |
| CN105294122A (en) * | 2015-10-21 | 2016-02-03 | 长兴中建耐火材料科技有限公司 | High-strength and light refractory aggregate |
| CN105294121A (en) * | 2015-10-21 | 2016-02-03 | 长兴中建耐火材料科技有限公司 | Light refractory aggregate resistant to thermal shock |
| CN107253851A (en) * | 2017-06-20 | 2017-10-17 | 合肥尚涵装饰工程有限公司 | A kind of light-weight insulating brick and preparation method thereof |
| CN107337462A (en) * | 2017-07-26 | 2017-11-10 | 合肥铭佑高温技术有限公司 | A kind of sintered refractory block and preparation method thereof |
| CN107857568A (en) * | 2017-11-29 | 2018-03-30 | 明光市泰丰新材料有限公司 | A kind of high-strength bricks for road surface and preparation method thereof |
| CN109053223A (en) * | 2018-08-27 | 2018-12-21 | 桂林桂特板业有限公司 | A kind of maintenance process of calcium silicate board |
| CN116082023A (en) * | 2023-01-04 | 2023-05-09 | 东北大学 | Method for preparing porous magnesia-based high-temperature ceramic by cooperatively utilizing magnesite tailings and magnesia waste |
-
2015
- 2015-06-09 CN CN201510310716.6A patent/CN104909817A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 杨力: "镁橄榄石轻质隔热材料制备、结构和性能的研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105237005A (en) * | 2015-10-21 | 2016-01-13 | 长兴中建耐火材料科技有限公司 | Highly-water-resistant light refractory aggregate |
| CN105294122A (en) * | 2015-10-21 | 2016-02-03 | 长兴中建耐火材料科技有限公司 | High-strength and light refractory aggregate |
| CN105294121A (en) * | 2015-10-21 | 2016-02-03 | 长兴中建耐火材料科技有限公司 | Light refractory aggregate resistant to thermal shock |
| CN105294122B (en) * | 2015-10-21 | 2019-02-01 | 浙江品创知识产权服务有限公司 | A kind of high-strength light refractory aggregate |
| CN105237005B (en) * | 2015-10-21 | 2019-02-01 | 浙江品创知识产权服务有限公司 | A kind of strong water-fast light-weight refractory aggregate |
| CN105294121B (en) * | 2015-10-21 | 2019-02-01 | 浙江品创知识产权服务有限公司 | A kind of light-weight refractory aggregate of anti-thermal shock |
| CN107253851A (en) * | 2017-06-20 | 2017-10-17 | 合肥尚涵装饰工程有限公司 | A kind of light-weight insulating brick and preparation method thereof |
| CN107337462A (en) * | 2017-07-26 | 2017-11-10 | 合肥铭佑高温技术有限公司 | A kind of sintered refractory block and preparation method thereof |
| CN107857568A (en) * | 2017-11-29 | 2018-03-30 | 明光市泰丰新材料有限公司 | A kind of high-strength bricks for road surface and preparation method thereof |
| CN109053223A (en) * | 2018-08-27 | 2018-12-21 | 桂林桂特板业有限公司 | A kind of maintenance process of calcium silicate board |
| CN116082023A (en) * | 2023-01-04 | 2023-05-09 | 东北大学 | Method for preparing porous magnesia-based high-temperature ceramic by cooperatively utilizing magnesite tailings and magnesia waste |
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Application publication date: 20150916 |