CN101649186B - Composite heat storage material and preparation method thereof - Google Patents
Composite heat storage material and preparation method thereof Download PDFInfo
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- CN101649186B CN101649186B CN200910044235XA CN200910044235A CN101649186B CN 101649186 B CN101649186 B CN 101649186B CN 200910044235X A CN200910044235X A CN 200910044235XA CN 200910044235 A CN200910044235 A CN 200910044235A CN 101649186 B CN101649186 B CN 101649186B
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- heat storage
- storage material
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- clay
- iron ore
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Abstract
The invention discloses a composite heat storage material and a preparation method thereof. The composite heat storage material is prepared by adopting hematite ore as main material, bauxite tailing as forming material and clay as auxiliary material and adding water to mix. The proportioning of the materials is that the contents of hematite ore, bauxite tailing and clay are separately 70-87%, 7-15% and 6-15%. The preparation method comprises the following steps: firstly mixing the materials: mixing tailing and clay evenly, adding water for soaking, then adding hematite ore to mix, placing the mixture in a ventilated place while controlling the moisture content; then shaping: placing the mixed materials in moulds to form and prepare test blocks; then drying: placing the test blocks in a oven to dry; finally roasting and cooling to obtain the heat storage material. The specific heat of the heat storage material is 0.150-0.166cal-g<-1>-K<-1> and the thermal conductivity is 1.18-1.30W-m<-1>-K<-1>. The preparation method of the heat storage material is characterized by easy process, low cost, higher value of mineral tailing and the like and the prepared composite heat storage material has high specific heat and good heat conductivity.
Description
Technical field
The invention belongs to energy and material and Thermal Power Engineering Field, relate to a kind of composite heat storage material and preparation method thereof.
Background technology
Composite heat storage material has important effect in energy and material and Thermal Power Engineering Field, can the performance of composite heat storage material and cost be its important factors that promote on a large scale and use in these fields of decision.Therefore, develop high energy storage density, composite heat storage material is most important cheaply.
At present, composite heat storage material mainly is compound, the organic/inorganic composite heat storage material of capsule type, inorganic salt/ceramic-base, its towards application be middle low temperature heat accumulation field, and adopt the higher wedding agent of cost raw material that thing is mutually different bonding in preparation process more.Present these technologies of preparing, have the following disadvantages: 1) specific heat is little, and heat storage capacity is general; 2) in heat accumulating moulding pressing process, need to adopt the higher wedding agent of cost; 3) only be applicable to middle low temperature heat accumulation field.Cause this type of composite heat storage material can not be applicable to the high-temperature heat-storage field thus, and energy storage density is general, preparation cost is higher.
Summary of the invention
The object of the present invention is to provide a kind of composite heat storage material and preparation method thereof, it is big that the heat accumulating that is provided has specific heat, the chemical stability height, is applicable to characteristics such as high-temperature heat-storage field; The method for preparing heat accumulating that is provided has that technology is simple, with low cost, the value-added characteristics of mineral tailings.
To achieve these goals, the present invention proposes following technical scheme:
A kind of method for preparing heat accumulating is characterized in that, is that major ingredient, bauxite tailings are that molding mass, clay are auxiliary material with the rhombohedral iron ore, adds water and mixes, moulding, drying, roasting.
Described material proportion is: rhombohedral iron ore 70～87%, tailings are 7～15%, and clay is 6～15%.
Described rhombohedral iron ore, its particle are micron order, and epigranular; Described bauxite tailings, main component are SiO
2And Al
2O
3
The preparation method of heat accumulating of the present invention, 1) batch mixing: earlier bauxite tailings and clay are mixed, add water to the state of soaking, add rhombohedral iron ore then and mix, be positioned over the ventilation and control its moisture content 2～4%; 2) moulding: compound is placed mould, and test block is made in compression moulding; 3) drying: 100 ℃ of dryings of baking oven are put in test block; 4) roasting: test block is 950 ℃ of roastings, and cooling is described heat accumulating.
The present invention is a major ingredient with cheap rhombohedral iron ore, makes whole composite heat storage material have good compressive property; Adopting the bauxite tailings is molding mass, makes full use of its main component SiO
2And Al
2O
3, strengthened resistivity against fire, chemical stability, specific heat capacity and the heat conductivility of heat accumulating, and made composite heat storage material be applicable to the high-temperature heat-storage field; Utilize clay to be auxiliary material, in mixing process, strengthened the cohesive force between the rhombohedral iron ore particle on the one hand, need not to add the higher wedding agent of cost, improved the physical stability of heat accumulating on the other hand.The specific heat of material is 0.150～0.166calg
-1K
-1, thermal conductivity is 1.18～1.30 (Wm
-1K
-1).
Embodiment
The following examples are only in order to further specify the present invention, rather than restriction the present invention.The present invention can implement by described any mode of summary of the invention.
Embodiment 1:
Get bauxite tailings (granularity is about 19 μ m) 1.4g, clay 1.2g, uniform mixing adds water to the state of soaking.The 17.4g rhombohedral iron ore is added wherein, mix.Be positioned over the ventilation and be dried to moisture content behind 4wt%, compound is placed mould, test block is made in compression moulding.After test block placed 100 ℃ of dryings of baking oven, 950 ℃ of roastings, cooling was heat accumulating.Adopting the specific heat of JR-3 laser heat conducting instrument test test block is 0.153calg
-1K
-1, thermal conductivity is 1.30Wm
-1K
-1
Embodiment 2:
Get bauxite tailings (granularity is about 12 μ m) 1.4g, clay 1.2g, uniform mixing adds water to the state of soaking.The 17.4g rhombohedral iron ore is added wherein, mix.Be positioned over the ventilation and be dried to moisture content behind 3wt%, compound is placed mould, test block is made in compression moulding.After test block placed 100 ℃ of dryings of baking oven, 950 ℃ of roastings, cooling was heat accumulating.Adopting the specific heat of JR-3 laser heat conducting instrument test test block is 0.150calg
-1K
-1, thermal conductivity is 1.18Wm
-1K
-1
Embodiment 3:
Get bauxite tailings (granularity is about 19 μ m) 3.0g, clay 3.0g, uniform mixing adds water to the state of soaking.The 14.0g rhombohedral iron ore is added wherein, mix.Be positioned over the ventilation and be dried to moisture content behind 2wt%, compound is placed mould, test block is made in compression moulding.After test block placed 100 ℃ of dryings of baking oven, 950 ℃ of roastings, cooling was heat accumulating.Adopting the specific heat of JR-3 laser heat conducting instrument test test block is 0.166calg
-1K
-1, thermal conductivity is 1.18Wm
-1K
-1
Embodiment 4:
Get bauxite tailings (granularity is about 12 μ m) 3.0g, clay 3.0g, uniform mixing adds water to the state of soaking.The 14.0g rhombohedral iron ore is added wherein, mix.Be positioned over the ventilation and be dried to moisture content behind 3wt%, compound is placed mould, test block is made in compression moulding.After test block placed 100 ℃ of dryings of baking oven, 950 ℃ of roastings, cooling was heat accumulating.Adopting the specific heat of JR-3 laser heat conducting instrument test test block is 0.154calg
-1K
-1, thermal conductivity is 1.23Wm
-1K
-1
Claims (2)
1. the preparation method of a heat accumulating is characterized in that: be that major ingredient, bauxite tailings are that molding mass, clay are auxiliary material with the rhombohedral iron ore, by mass percentage, material proportion is: rhombohedral iron ore 70～87%, the bauxite tailings is 7～15%, and clay is 6～15%, may further comprise the steps
1) batch mixing: earlier bauxite tailings and clay are mixed, add entry, add rhombohedral iron ore then and mix, be positioned over the ventilation and control its moisture content 2～4wt% to the state of soaking;
2) moulding: compound is placed mould, and test block is made in compression moulding;
3) drying: 100 ℃ of dryings of baking oven are put in test block;
4) roasting: test block is 950 ℃ of roastings, and cooling is described heat accumulating.
2. the preparation method of heat accumulating according to claim 1, it is characterized in that: the particle of described rhombohedral iron ore is a micron order, and epigranular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910044235XA CN101649186B (en) | 2009-09-02 | 2009-09-02 | Composite heat storage material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910044235XA CN101649186B (en) | 2009-09-02 | 2009-09-02 | Composite heat storage material and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101649186A CN101649186A (en) | 2010-02-17 |
| CN101649186B true CN101649186B (en) | 2011-05-25 |
Family
ID=41671516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910044235XA Expired - Fee Related CN101649186B (en) | 2009-09-02 | 2009-09-02 | Composite heat storage material and preparation method thereof |
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| Country | Link |
|---|---|
| CN (1) | CN101649186B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102627462B (en) * | 2012-04-06 | 2013-10-16 | 武汉钢铁(集团)公司 | Gunning material for on-line quick ring forming of rotary kiln |
| CN103145401B (en) * | 2013-04-03 | 2014-04-02 | 湖南高峰陶瓷制造有限公司 | Heat storage ceramic plate and manufacturing process thereof |
| CN107337436B (en) * | 2017-05-18 | 2020-03-10 | 全球能源互联网研究院有限公司 | Phase-change heat storage material and preparation method thereof |
| CN109181655A (en) * | 2018-09-29 | 2019-01-11 | 辽宁中镁高温材料有限公司 | The formula and preparation method of a kind of hot enhanced physical properties of iron ore for high temperature heat accumulation |
| CN113402292A (en) * | 2021-07-30 | 2021-09-17 | 贵阳鑫睿材料科技有限公司 | Preparation method of photothermal power generation energy storage ceramsite |
| CN115073136B (en) * | 2022-06-10 | 2023-05-05 | 武汉理工大学 | High-steel slag mixing amount heat absorption and storage integrated ceramic and preparation method thereof |
| CN115432993B (en) * | 2022-09-23 | 2023-06-02 | 内蒙古梅捷新能源科技有限公司 | Solid heat storage material and preparation method and application thereof |
-
2009
- 2009-09-02 CN CN200910044235XA patent/CN101649186B/en not_active Expired - Fee Related
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| CN101649186A (en) | 2010-02-17 |
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Granted publication date: 20110525 Termination date: 20120902 |