CN102633527B - Building insulated wall body material and preparation method thereof - Google Patents

Building insulated wall body material and preparation method thereof Download PDF

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Publication number
CN102633527B
CN102633527B CN201210129910.0A CN201210129910A CN102633527B CN 102633527 B CN102633527 B CN 102633527B CN 201210129910 A CN201210129910 A CN 201210129910A CN 102633527 B CN102633527 B CN 102633527B
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red mud
maintenance
phosphogypsum
cement
preparation
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CN102633527A (en
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吉晓莉
陈卓
王浩
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Wuhan Zhongli Environmental Protection Technology Co., Ltd.
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Wuhan University of Technology WUT
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Abstract

The invention relates to a building insulated wall body material and a preparation method of the building insulated wall body material. The preparation method comprises the following steps of: (1) mixing ardealite, red mud, fly ash, cement, yellow sand and lime according to the proportion, and adding a foamer so as to obtain a material which is uniformly mixed; (2) adding water in the material after mixing, performing ball milling, and preparing a slurry;(3) pouring the slurry after ball milling in a mould so as to carry out injection molding; and (4) placing a green body in a maintenance box, maintaining under high temperature and high pressure, and then maintaining under a natural state. Compared with the prior art, the building insulated wall body material and the preparation method have the advantages that the industrial residue, the ardealite and the red mud are sufficiently utilized, the pollution of the ardealite and the red mud to the environment can be reduced, and thus the purpose of recycling resources is achieved. The manufacturing of the building heat insulating material has the advantages of short period, low cost, no radioactive contamination, low density and high strength.

Description

Building heat preservation materials for wall and preparation method thereof
Technical field
The present invention relates to building thermal insulation material field, be specifically related to a kind of method of utilizing trade waste phosphogypsum and red mud to prepare building heat preservation materials for wall.
Background technology
Phosphogypsum is a kind of industrial by-products of discharging while producing phosphoric acid, and its main component of waste residue of preparing phosphoric acid generation by wet process is the dihydrate gypsum similar with plaster of paris physical properties, and 1 ton of phosphoric acid of every production approximately discharges 5 tons of phosphogypsums.At present, global phosphogypsum annual emissions reaches 2.8 hundred million tons, and along with the fast development of China's phosphate fertilizer industry, China's phosphogypsum quantity discharged has surpassed 5,000 ten thousand tons, accounts for 18% of global gypsum quantity discharged.In the quantity discharged of China's phosphogypsum, have 27.7% phosphogypsum for the manufacture of cement and gypsum building material product, production industrial chemicals, as industry or roadbed filling, improvement soil, Extraction of rare earth element etc., and the utilization ratio in the whole world only reaches 20% left and right.Due to phosphogypsum, contain the objectionable impuritiess such as Vanadium Pentoxide in FLAKES, fluorine, free acid and radioactive substance, national environmental protection department by its qualitative be danger wastes, at random discharge can cause environmental pollution; Not only occupation of land is many, investment is large for the long-term accumulation of phosphogypsum, slag expense is high, and high to the Geological Condition Requirement in stockyard, also can cause the pollution of surface water and underground water.
Red mud is to take that the particle that bauxite produces in raw material production alumina process is superfine, strong basicity solid slag, and 1 ton of aluminum oxide of every production, approximately produces 0.8 ~ 1.5 ton of red mud.China is alumina producing big country, within 2009, produces 2,378 ten thousand tons, aluminum oxide, accounts for 30% of Gross World Product, nearly 3,000 ten thousand tons of the red mud of generation.China's red mud comprehensive utilization ratio is only 4% at present, and accumulation volume of cargo in storage reaches 200,000,000 tons.A large amount of waste red mud residues pile up like a mountain land occupation, atmosphere pollution, polluted water and contaminate environment.
The current comprehensive utilization about phosphogypsum mainly concentrates on prepares chemical fertilizer, plasterboard, and cement setting retarder, building gypsum plaster and production producing sulfuric acid and jointly cement, and phosphogypsum is not mixed to the patent of doing building thermal insulation material with red mud.
Summary of the invention
Technical problem to be solved by this invention is: a kind of building thermal insulation material and preparation method thereof is provided, and gained building heat preservation materials for wall lightweight, porous, intensity are higher, have good insulation, heat insulation, sound insulation function, comply with the national standard requirements.
The technical scheme that the present invention solves its technical problem employing is: building heat preservation materials for wall, include following component through mixing, moulding and maintenance form, and each component concentration is: phosphogypsum 20%～35%, red mud 15%～25%, cement 15%～25%, flyash 10%～25%, yellow ground 5%～10%, lime 4%～8%, whipping agent 0.2%～1.0%, is mass percent.
Press such scheme, it is characterized in that described whipping agent is Al powder.
Press such scheme, each component concentration is preferably phosphogypsum 31%, red mud 22%, and cement 18%, flyash 17%, yellow ground 6.8%, lime 5%, Al powder 0.2%, is mass percent.
The preparation method of described building heat preservation materials for wall, is characterized in that including following steps:
1) preparation of slurry
First phosphogypsum, red mud, flyash, cement, yellow ground and lime are mixed in proportion, add again whipping agent, the material that obtains mixing, each component concentration is: phosphogypsum 20%～35%, red mud 15%～25%, cement 15%～25%, flyash 10%～25%, yellow ground 5%～10%, lime 4%～8%, whipping agent 0.2%～1.0%, is mass percent;
2) processing of compound
In the material mixing, add the water that accounts for quality of material 25%～45%, ball milling 1.5～2.5h, makes slip;
3) preparation of base substrate
By step 2) slip after gained ball milling pours casting in mould into;
4) maintenance
The base substrate of step 3) gained moulding is placed in to maintaining box, maintenance under High Temperature High Pressure, then be placed in maintenance under state of nature.
Press such scheme, each component concentration is: phosphogypsum 31%, and red mud 22%, cement 18%, flyash 17%, yellow ground 6.8%, lime 5%, whipping agent 0.2%, is mass percent.
Press such scheme, the processing condition of described maintenance are: gained base substrate is that 80～120 ℃, pressure are maintenance 24h～48h under 1MPa～3MPa in temperature, then are placed under state of nature maintenance 6～8 days.
Phosphogypsum of the present invention consist of CaO19.05%～32.72%, SiO 220.56%～41.28%, Fe 2o 30.09%～1.45%, Al 2o 30.39%～1.81%, SO 327.46%～40.57%, P 2o 50.79%～1.78%, Na 2o0.13%～0.98%, K 2o0.12%～0.85%, CaSO 42H 2the content of O is about 90%, contains in addition a small amount of organophosphorus, sulphur, the existence of fluoride compound impurity, is mass percent.
The chief component of described red mud is CaO13.27%～40.78%, SiO 215.22%～25.36%, Fe 2o 33.41%～7.53%, Al 2o 321.55%～43.46%, TiO 20.82%～2.93%, Na 2o2.82%～5.62%, K 2o0.2%～0.77% and lot of trace composition, be mass percent;
The chief component of described flyash is Al 2o 317.67%～36.28%, SiO 238.53%～60.48%, CaO3.71%～15.28%, Fe 2o 31.33%～9.76%, Na 2o0.82%～3.23%, K 2o0.45%～1.81% is mass percent.
Mechanism principle of the present invention: the present invention utilizes the acidity of phosphogypsum and the neutralization of the alkalescence of red mud, and main base-material is provided; Cement is as gelling material, and the activeconstituents that flyash and lime produce further improves the pectisation of cement; Yellow ground can improve the intensity of base substrate.Activeconstituents generated reactive gas in whipping agent and cement, flyash and form bubble.
The advantage that the present invention compared with prior art has is mainly: industrial residue phosphogypsum and red mud are utilized effectively, and phosphogypsum and red mud are reduced the pollution of environment, are conducive to the recycle of resource.It is short that the production of this building thermal insulation material has the cycle, and cost is low, no radioactivity pollute, and density is lower, the advantage that intensity is high.Through engineering department, check: apparent porosity, unit weight rate reaches GB/T 1966-1996, and compressive strength reaches GB/T1965-1996, and thermal conductivity reaches the building thermal insulation material of the requirement of JC/T 1062-2007.
Embodiment
Below in conjunction with embodiment, the present invention will be further described in detail, but can not be construed as limiting the invention.
Embodiment 1:
1. prepare burden:
Proportioning raw materials is pressed following weight percent meter: phosphogypsum 34%, and red mud 16%, cement 20%, flyash 15%, yellow ground 7.6%, lime 7%, Al powder 0.4%, first mixes phosphogypsum, red mud, flyash, cement, yellow ground and lime, then adds whipping agent; The additional water that accounts for mixture 35%, ball milling 2h.
2. moulding: the raw material mixing is injection molded, obtains base substrate.
3. maintenance: gained base substrate is placed in to maintaining box, maintenance 48h under 90 ℃ of temperature, pressure 2MPa, then be placed under state of nature maintenance 6 days, obtain building thermal insulation material.
After tested, building thermal insulation material void content is 45.3%, meets JC943-2004; Density is 0.76g/cm 3, meet the requirement of JC/T 1062-2007; Compressive strength is 50MP, meets the requirement of GB/T1965-1996; Thermal conductivity is 0.19 w/ (mk), meets the requirement of JC/T 1062-2007.
Phosphogypsum
Component CaO SiO 2 Fe 2O 3 Al 2O 3 SO 3 P 2O 5 Na 2O K 2O Other
Content 25.30 23.46 0.87 1.79 37.46 0.79 0.13 0.72 9.48
Red mud
Component CaO SiO 2 Fe 2O 3 Al 2O 3 Na 2O K 2O TiO 2 Other
Content 14.27 17.2 4.10 31.05 4.82 0.45 2.30 25.81
Flyash
Component Al 2O 3 SiO 2 CaO Na 2O K 2O Fe 2O 3 TiO 2 MgO Other
Content 26.72 45.35 6.10 1.00 1.51 8.73 1.04 1.06 8.49
Embodiment 2:
1. prepare burden:
Proportioning raw materials is pressed following weight percent: phosphogypsum 30%, and red mud 20%, cement 24%, flyash 10%, yellow ground 9.5%, lime 6%, Al powder 0.5%, first mixes phosphogypsum, red mud, flyash, cement, yellow ground and lime, then adds whipping agent; The additional water that accounts for mixture 32%, ball milling 2.5h.
2. moulding: the raw material mixing is injection molded, obtains base substrate.
3. maintenance: gained base substrate is placed in to maintaining box, maintenance 36h under 95 ℃ of temperature, pressure 2MPa, then be placed under state of nature maintenance 6 days, obtain building thermal insulation material.
After tested, building thermal insulation material void content is 44.8%, meets JC943-2004; Density is 0.79g/cm 3, meet the requirement of JC/T 1062-2007; Compressive strength is 53MP, meets the requirement of GB/T1965-1996; Thermal conductivity is 0.17 w/ (mk), meets the requirement of JC/T 1062-2007.
Embodiment 3:
1. prepare burden:
Proportioning raw materials is pressed following weight percent: phosphogypsum 30%, and red mud 25%, cement 20%, flyash 12%, yellow ground 5.4%, lime 7%, Al powder 0.6%, first mixes phosphogypsum, red mud, flyash, cement, yellow ground and lime, then adds whipping agent; The additional water that accounts for mixture 38%, ball milling 2h.
2. moulding: the raw material mixing is injection molded, obtains base substrate.
3. maintenance: gained base substrate is placed in to maintaining box, maintenance 36h under 100 ℃ of temperature, pressure 1.5MPa, then be placed under state of nature maintenance 7 days, obtain building thermal insulation material.
After tested, building thermal insulation material void content is 47.8%, meets JC943-2004; Density is 0.73g/cm 3, meeting the requirement of JC/T 1062-2007, compressive strength is 52.5MP, meets the requirement of GB/T1965-1996; Thermal conductivity is 0.20 w/ (mk), meets the requirement of JC/T 1062-2007.
Embodiment 4:
1. prepare burden:
Proportioning raw materials is pressed following weight percent: phosphogypsum 28%, and red mud 20%, cement 20%, flyash 20%, yellow ground 7.5%, lime 4%, Al powder 0.5%, first mixes phosphogypsum, red mud, flyash, cement, yellow ground and lime, then adds whipping agent; The additional water that accounts for mixture 30%, ball milling 2.5h.
2. moulding: the raw material mixing is injection molded, obtains base substrate.
3. maintenance: gained base substrate is placed in to maintaining box, maintenance 24h under 100 ℃ of temperature, pressure 2.5MPa, then be placed under state of nature maintenance 8 days, obtain building thermal insulation material.
After tested, building thermal insulation material void content is 46.1%, meets JC943-2004; Density is 0.77g/cm 3, meeting the requirement of JC/T 1062-2007, compressive strength is 54.2MP, meets the requirement of GB/T1965-1996; Thermal conductivity is 0.19 w/ (mk), meets the requirement of JC/T 1062-2007.
Embodiment 5:
1. prepare burden:
Proportioning raw materials is pressed following weight percent: phosphogypsum 25%, and red mud 18%, cement 16%, flyash 25%, yellow ground 7.4%, lime 8%, Al powder 0.6%, first mixes phosphogypsum, red mud, flyash, cement, yellow ground and lime, then adds whipping agent; The additional water that accounts for mixture 40%, ball milling 2h.
2. moulding: the raw material mixing is injection molded, obtains base substrate.
3. maintenance: gained base substrate is placed in to maintaining box, maintenance 24h under 105 ℃ of temperature, pressure 2MPa, then be placed under state of nature maintenance 7 days, obtain building thermal insulation material.
After tested, building thermal insulation material void content is 47.6%, meets JC943-2004; Density is 0.83g/cm 3, meeting the requirement of JC/T 1062-2007, compressive strength is 53.7MP, meets the requirement of GB/T1965-1996; Thermal conductivity is 0.22 w/ (mk), meets the requirement of JC/T 1062-2007.
Embodiment 6:
1. prepare burden:
Proportioning raw materials is pressed following weight percent: phosphogypsum 20%, and red mud 25%, cement 18%, flyash 20%, yellow ground 8.6%, lime 8%, Al powder 0.4%, first mixes phosphogypsum, red mud, flyash, cement, yellow ground and lime, then adds whipping agent; The additional water that accounts for mixture 35%, ball milling 2h.
2. moulding: the raw material mixing is injection molded, obtains base substrate.
3. maintenance: gained base substrate is placed in to maintaining box, maintenance 36h under 100 ℃ of temperature, pressure 2MPa, then be placed under state of nature maintenance 8 days, obtain building thermal insulation material.
After tested, building thermal insulation material void content is 45.6%, meets JC943-2004; Density is 0.80g/cm 3, meeting the requirement of JC/T 1062-2007, compressive strength is 56.7MP, meets the requirement of GB/T1965-1996; Thermal conductivity is 0.21 w/ (mk), meets the requirement of JC/T 1062-2007.

Claims (4)

1. building heat preservation materials for wall, include following component through mixing, moulding and maintenance form, and each component concentration is: phosphogypsum 20%～35%, red mud 15%～25%, cement 15%～25%, flyash 10%～25%, yellow ground 5%～10%, lime 4%～8%, whipping agent 0.2%～1.0%, is mass percent, and described whipping agent is Al powder.
2. building heat preservation materials for wall according to claim 1, is characterized in that: each component concentration is phosphogypsum 31%, red mud 22%, and cement 18%, flyash 17%, yellow ground 6.8%, lime 5%, Al powder 0.2%, is mass percent.
3. the preparation method of building heat preservation materials for wall claimed in claim 1, is characterized in that including following steps:
1) preparation of slurry
First phosphogypsum, red mud, flyash, cement, yellow ground and lime are mixed in proportion, add again whipping agent, the material that obtains mixing, each component concentration is: phosphogypsum 20%～35%, red mud 15%～25%, cement 15%～25%, flyash 10%～25%, yellow ground 5%～10%, lime 4%～8%, whipping agent 0.2%～1.0%, is mass percent;
2) processing of compound
In the material mixing, add the water that accounts for quality of material 25%～45%, ball milling 1.5～2.5h, makes slip;
3) preparation of base substrate
By step 2) slip after gained ball milling pours casting in mould into;
4) maintenance
The base substrate of step 3) gained moulding is placed in to maintaining box, maintenance under High Temperature High Pressure, be placed in again maintenance under state of nature, the processing condition of described maintenance are: gained base substrate is that 80～120 ℃, pressure are maintenance 24h～48h under 1MPa～3MPa in temperature, then are placed under state of nature maintenance 6～8 days.
4. the preparation method of building heat preservation materials for wall according to claim 3, is characterized in that each component concentration is: phosphogypsum 31%, and red mud 22%, cement 18%, flyash 17%, yellow ground 6.8%, lime 5%, whipping agent 0.2%, is mass percent.
CN201210129910.0A 2012-04-28 2012-04-28 Building insulated wall body material and preparation method thereof Active CN102633527B (en)

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CN108314400A (en) * 2018-03-21 2018-07-24 合肥广民建材有限公司 A kind of preparation method of light wall thermal insulating material
CN108752040A (en) * 2018-07-03 2018-11-06 贵州鑫源道建材科技有限公司 A kind of method that full industrial residue prepares baking-free heat preservation walling material
CN109369128A (en) * 2018-10-19 2019-02-22 户县融基建材有限责任公司 A kind of method and its building block using building waste and mill tailings preparation building block
CN112194441A (en) * 2020-10-14 2021-01-08 中国铝业股份有限公司 Method for preparing microporous aluminum-silicon-calcium heat-insulating material by using Bayer process red mud through steam pressure activation
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CN1456536A (en) * 2002-05-07 2003-11-19 李兴 Foam glaze baked bat of sludge (clay) integrated utilizing products
CN100349827C (en) * 2002-11-21 2007-11-21 李肖平 High-blended gangue bulked light high-strength material and making method thereof
CN1239433C (en) * 2003-05-07 2006-02-01 河海大学 Foaming agent for earthwork

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