CN102515828B - Porous heat-insulation material prepared utilizing iron ore surrounding rock and iron tailings and preparation method thereof - Google Patents
Porous heat-insulation material prepared utilizing iron ore surrounding rock and iron tailings and preparation method thereof Download PDFInfo
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- CN102515828B CN102515828B CN201110416661.9A CN201110416661A CN102515828B CN 102515828 B CN102515828 B CN 102515828B CN 201110416661 A CN201110416661 A CN 201110416661A CN 102515828 B CN102515828 B CN 102515828B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention relates to a porous heat-insulation material prepared utilizing iron ore surrounding rock and iron tailings and a preparation method of the porous heat-insulation material. The porous heat-insulation material prepared utilizing the iron ore surrounding rock and iron tailings is characterized by being prepared from the following components in percentage by weight: 30-60% of iron tailing powder, 20-50% of iron ore surrounding rock powder, 0.5-10% of foaming agent, 0-1% of cosolvent and 0.1-9% of foam stabilizer by uniformly mixing, then adding water, mixing and pulping, carrying out microwave calcining and cooling. The preparation method of the porous heat-insulation material prepared utilizing the iron ore surrounding rock and iron tailings has high utilization rates of iron ore surrounding rock and iron tailings; and the prepared porous heat-insulation material has low density and excellent heat-insulation performance.
Description
Technical field
The invention belongs to construction material class, relate to and utilize porous insulation material prepared by iron ore country rock and iron tailings and preparation method thereof.
Background technology
Along with developing rapidly of steel and iron industry, iron ore is peeled off the solid waste total amounts such as the country rock of generation and mine tailing and is reached 2,000,000,000 t.This has taken a large amount of soils; and because how mill tailings has been milled to 0. 15 even below 0. 07mm; therefore be stored in tailing dam or while entering river course, mountain valley, lowland nearby; often can overflow by seepage flow; the airborne dust of blowing; form sandstorm and severe contamination water source, soil and air, worsen life and the working condition of surrounding area, to human habitat, brought severe contamination and harm.Except this, the harmful components in mine tailing and residual beneficiation reagent also can cause serious harm to ecological environment.This has caused the extensive concern of the whole society therefrom.
At the same time, along with a large amount of exploitation of mineral resources, ore day by day poor, mine tailing is also subject to the attention of countries in the world gradually as secondary resource.And the comprehensive utilization ratio of China's mine tailing is only 7% at present, and many chemical compositions because of iron tailings approach building ceramic material, glass, the needed composition such as brick and tile, although and for the raw material of construction material also have at present some reports by iron tailings for the preparation of sintered heat insulating material, as the Chinese patent application of Xi'an materials for wall research institute patent publication No. CN101638918A discloses, a kind of to take iron tailings and natural material shale be primary raw material, add flexibilizer, cosolvent and blowing agent utilization tradition kiln sintering process are prepared the method for insulation material, Wuhan University of Technology's publication number is that the Chinese patent application of CN102167618A discloses a kind of flyash-iron tailings base porous insulation material and preparation method thereof, it is by powdery solid discarded object, binding agent, flux flexibilizer and composite foamable agent mixes.But it all exists, heat transfer is inhomogeneous, foaming pore size distributional difference is large, and density is high, and the problem that heat-insulating property is poor is difficult to realize suitability for industrialized production; The shared ratio of iron tailings use amount is low, only reaches 10-40%, still needs and uses other natural materials as shale etc., and iron tailings utilization rate is low, is unfavorable for a large amount of, the scale utilization of iron tailings.
Summary of the invention
Technical problem to be solved by this invention is to be to overcome insulation material prepared by existing iron tailings to have the shortcoming that iron tailings utilization rate is not high, density is high, heat-insulating property is poor, a kind of porous insulation material prepared by iron ore country rock and iron tailings and preparation method thereof that utilizes is provided, this preparation method's iron ore country rock and iron tailings utilization rate are high, the porous insulation material density making is low, and heat-insulating property is excellent.
In order to solve the problems of the technologies described above, the technical solution used in the present invention:
The porous insulation material that utilizes iron ore country rock and iron tailings to prepare, it is characterized in that: it is by weight percentage by iron tailings powder 30-60%, iron ore country rock powder 20-50%, blowing agent 0.5-10%, cosolvent 0-1%, adds water mix grinding and becomes slip microwave calcination, cooling and obtain after foam stabilizer 0.1-9% mixes.
Press such scheme, described iron tailings powder is sieved and is obtained by iron tailings, fineness < 100 μ m.
Press such scheme, the country rock that described iron ore country rock powder is peeled off rear generation by iron ore is dried, grinding obtains to fineness < 100 μ m.
Press such scheme, described blowing agent is one or more the mixing in carborundum, calcium carbonate, calcium oxalate.Described blowing agent is by inflammable or decompose to produce gas as CO
2and play the effect of blowing agent.
Press such scheme, described cosolvent is one or more the mixing in sodium carbonate, prodan, ethylenediamine, manganese oxide.
Press such scheme, described foam stabilizer is one or more the mixing in calgon, boric acid, sodium phosphate, antimony oxide, borax, sodium pyrophosphate.
Utilize iron ore country rock and iron tailings to prepare the method for porous insulation material, it is characterized in that: it is to be iron tailings powder 30-60% by weight percentage by iron tailings powder, iron ore country rock powder, blowing agent, cosolvent, foam stabilizer, iron ore country rock powder 20-50%, blowing agent 0.5-10%, cosolvent 0-1%, foam stabilizer 0.1-9%, choose material, mix, then add water mix grinding and become slip, ageing, dry, 700-1000 ℃ of microwave calcination, cooling, the demoulding and obtaining.
Press such scheme, described microwave irradiation power is 2.45GHz ± 25MHz.
Press such scheme, the described microwave calcination time is 0.5-5h.
Beneficial effect of the present invention:
1, the present invention adopts iron ore to peel off generation country rock and mine tailing are made primary raw material, and iron ore country rock and Mine Tailings Utilization, up to 90%, reduce discharging benefit obvious, preparation process energy-conserving and environment-protective;
Adopt microwave calcination technique to carry out sintering, sintering is even, and due to remaining the existing with the equally distributed natural wave absorbing agent iron oxide of chemical state of iron tailings, can effectively improve the absorbability of microwave, make heating-up temperature homogenising, for obtaining the porous insulation material of steady quality, good heat insulating, provide reliable process means; Also the system problem of non-uniform of having avoided the required extra interpolation wave absorbing agent of Yin Putong microwave sintering process simultaneously and having brought;
The blowing agent adding in preparation process can pass through inflammable or decompose to produce gas as CO in calcination process
2and play the effect of foaming; The cosolvent of the appropriate amount adding and foam stabilizer, can reduce calcining heat, increases blowing temperature scope simultaneously, reduces the generation probability of intercommunicating pore in preparation process, improves the mechanical strength of the porous insulation material making thus, improves yield rate;
2, low (the about 50-150 kg/m of porous insulation material density that utilizes iron ore country rock and iron tailings microwave sintering to prepare in the present invention
3), heat-insulating property excellent (the about 0.05-0.07W/mK of thermal conductivity factor), can be widely used in industry, civil buildings.
the specific embodiment:
Below in conjunction with embodiment, further illustrate summary of the invention of the present invention.
Embodiment 1:
The iron tailings powder of the fineness < 100 μ m that iron tailings screening is obtained, iron ore is peeled off the country rock oven dry of rear generation, ball mill grinding is to the iron ore country rock powder of < 100 μ m, blowing agent, cosolvent, foam stabilizer is iron tailings powder 60% by weight percentage, iron ore country rock powder 20%, technical grade carborundum 10%, technical grade prodan 1%, technical grade boric acid 9%, choose material, mix, then add water mix grinding and become slip, and put into mould ageing, roll, dry, the microwave field that is placed in microwave frequency and is 2.45GHz ± 25MHz is heated to 900 ± 50 ℃, microwave calcination 0.5h, then slow cooling, the demoulding, cutting obtains density is 50kg/m
3, the porous insulation material that thermal conductivity factor is 0.05-0.06W/mK.
Embodiment 2:
The iron tailings powder of the fineness < 100 μ m that iron tailings screening is obtained, iron ore is peeled off the country rock oven dry of rear generation, ball mill grinding is to the iron ore country rock powder of < 100 μ m, blowing agent, cosolvent, foam stabilizer is iron tailings powder 30% by weight percentage, iron ore country rock powder 50%, technical grade calcium oxalate 10%, technical grade manganese oxide 1%, technical grade calgon 9%, choose material, mix, then add water mix grinding and become slip, and put into mould ageing, roll, dry, the microwave field that is placed in microwave frequency and is 2.45GHz ± 25MHz is heated to 750 ± 50 ℃, microwave calcination 5h, slow cooling, the demoulding, cutting obtains density is 60kg/m
3, the porous insulation material that thermal conductivity factor is 0.05-0.06W/mK.
Embodiment 3:
The iron tailings powder of the fineness < 100 μ m that iron tailings screening is obtained, iron ore is peeled off the country rock oven dry of rear generation, ball mill grinding is to the iron ore country rock powder of < 100 μ m, blowing agent, cosolvent, foam stabilizer is iron tailings powder 40% by weight percentage, iron ore country rock powder 50%, technical grade carborundum 0.5%, technical grade sodium carbonate 1%, PHOSPHORIC ACID TECH.GRADE sodium 8.5%, choose material, mix, then add water mix grinding and become slip, and put into mould ageing, roll, dry, the microwave field that is placed in microwave frequency and is 2.45GHz ± 25MHz is heated to 800 ± 50 ℃, microwave calcination 2.5h, cooling, the demoulding obtains density is 150kg/m
3, the porous insulation material that thermal conductivity factor is 0.07-0.08W/mK.
Embodiment 4:
The iron tailings powder of the fineness < 100 μ m that iron tailings screening is obtained, iron ore is peeled off the country rock oven dry of rear generation, ball mill grinding is to the iron ore country rock powder of < 100 μ m, blowing agent, foam stabilizer is iron tailings powder 50% by weight percentage, iron ore country rock powder 40%, technical grade calcium oxalate 7%, technical grade antimony oxide 3%, choose material, mix, then add water mix grinding and become slip, and put into mould ageing, roll, dry, the microwave field that is placed in microwave frequency and is 2.45GHz ± 25MHz is heated to 950 ± 50 ℃, microwave calcination 5h, slow cooling, the demoulding, cutting obtains density is 100kg/m
3, the porous insulation material that thermal conductivity factor is 0.06-0.07W/mK.
Embodiment 5:
The iron tailings powder of the fineness < 100 μ m that iron tailings screening is obtained, iron ore is peeled off the country rock oven dry of rear generation, ball mill grinding is to the iron ore country rock powder of < 100 μ m, blowing agent, cosolvent, foam stabilizer is iron tailings powder 60% by weight percentage, iron ore country rock powder 30%, technical grade carborundum 9%, technical grade ethylenediamine 0.5%, technical grade sodium pyrophosphate 0.5%, choose material, mix, then add water mix grinding and become slip, and put into mould ageing, roll, dry, the microwave field that is placed in microwave frequency and is 2.45GHz ± 25MHz is heated to 900 ± 50 ℃, microwave calcination 0.5h, then slow cooling, the demoulding, cutting obtains density is 60kg/m
3, the porous insulation material that thermal conductivity factor is 0.05-0.06W/mK.
Claims (5)
1. the porous insulation material that utilizes iron ore country rock and iron tailings to prepare, it is characterized in that: it is by weight percentage by iron tailings powder 30-60%, iron ore country rock powder 20-50%, blowing agent 0.5-10%, flux 0-1%, after foam stabilizer 0.1-9% mixes, add water mix grinding and become slip, ageing, dry, 700-1000 ℃ of microwave calcination, cooling, the demoulding and obtaining, microwave irradiation power is 2.45GHz ± 25MHz, the microwave calcination time is 0.5-5h; Described iron tailings powder is sieved and is obtained by iron tailings, fineness < 100 μ m: the country rock that described iron ore country rock powder is peeled off rear generation by iron ore is dried, grinding obtains to fineness < 100 μ m.
2. the porous insulation material that utilizes iron ore country rock and iron tailings to prepare according to claim 1, is characterized in that: described blowing agent is one or more the mixing in carborundum, calcium carbonate, calcium oxalate.
3. the porous insulation material that utilizes iron ore country rock and iron tailings to prepare according to claim 1, is characterized in that: described flux is one or more the mixing in sodium carbonate, prodan, ethylenediamine, manganese oxide.
4. the porous insulation material that utilizes iron ore country rock and iron tailings to prepare according to claim 1, described foam stabilizer is one or more the mixing in calgon, boric acid, sodium phosphate, antimony oxide, borax, sodium pyrophosphate.
5. the preparation method who utilizes porous insulation material prepared by iron ore country rock and iron tailings claimed in claim 1, it is characterized in that: it is by iron tailings powder, iron ore country rock powder, blowing agent, flux, foam stabilizer is iron tailings powder 30-60% by weight percentage, iron ore country rock powder 20-50%, blowing agent 0.5-10%, flux 0-1%, foam stabilizer 0.1-9%, choose material, mix, then add water mix grinding and become slip, ageing, dry, 700-1000 ℃ of microwave calcination, cooling, the demoulding and obtaining, microwave irradiation power is 2.45GHz ± 25MHz, the microwave calcination time is 0.5-5h, described iron tailings powder is sieved and is obtained by iron tailings, fineness < 100 μ m: the country rock that described iron ore country rock powder is peeled off rear generation by iron ore is dried, grinding is to fineness < 100 μ m.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110416661.9A CN102515828B (en) | 2011-12-14 | 2011-12-14 | Porous heat-insulation material prepared utilizing iron ore surrounding rock and iron tailings and preparation method thereof |
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| CN201110416661.9A CN102515828B (en) | 2011-12-14 | 2011-12-14 | Porous heat-insulation material prepared utilizing iron ore surrounding rock and iron tailings and preparation method thereof |
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| CN102515828A CN102515828A (en) | 2012-06-27 |
| CN102515828B true CN102515828B (en) | 2014-04-09 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103342578B (en) * | 2013-06-26 | 2014-12-03 | 武汉理工大学 | Porous insulating decorative material prepared by utilizing iron tailings and preparation method thereof |
| CN105601206A (en) * | 2016-02-01 | 2016-05-25 | 中国十七冶集团有限公司 | Iron ore waste rock self-compaction concrete |
| CN108503371B (en) * | 2018-04-25 | 2020-12-15 | 东北大学 | Method for preparing foamed ceramic material by using blast furnace slag and high-alumina fly ash |
| CN108503338B (en) * | 2018-04-25 | 2020-12-15 | 东北大学 | Method for preparing high-strength foamed ceramic material by using fly ash |
| CN110256045A (en) * | 2019-04-30 | 2019-09-20 | 东北大学 | Foam insulation board prepared from iron tailings and preparation method thereof |
| CN112552072A (en) * | 2020-12-28 | 2021-03-26 | 深圳市华威环保建材有限公司 | Construction waste regenerated foamed ceramic and preparation method thereof |
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| CN101152980A (en) * | 2006-09-30 | 2008-04-02 | 郜长福 | Microwave oven sintering method of producing silicon nitride ceramics heater and special equipment thereof |
| CN101638918A (en) * | 2009-08-19 | 2010-02-03 | 西安墙体材料研究设计院 | Technology for preparing porous heat insulation plates by sintering iron tailings |
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Patent Citations (3)
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| CN101152980A (en) * | 2006-09-30 | 2008-04-02 | 郜长福 | Microwave oven sintering method of producing silicon nitride ceramics heater and special equipment thereof |
| CN101638918A (en) * | 2009-08-19 | 2010-02-03 | 西安墙体材料研究设计院 | Technology for preparing porous heat insulation plates by sintering iron tailings |
| CN101684680A (en) * | 2009-08-19 | 2010-03-31 | 西安墙体材料研究设计院 | Iron tailing sintered porous heat insulation board |
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| 刘媛媛等.铁尾矿烧结多孔保温材料制备工艺及结构研究.《建筑科学》.2009,第25卷(第12期),第63-64页"2.1 原料及工艺过程"部分. |
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