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Preparation method of a paraffin/iron tailings ceramic composite phase change energy storage material by melt infiltration

A phase change energy storage material, ceramic composite technology, applied in the field of material science and engineering, can solve the problems of fine particles, difficult to use to produce sintered brick concrete, etc., achieve high content of phase change materials, good thermophysical properties and mechanical properties, The effect of mitigating environmental hazards

Active Publication Date: 2020-08-14
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First of all, fine-grained iron tailings are too small to be used in the production of sintered bricks and concrete, etc. Currently, they can only be piled up for storage

Method used

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  • Preparation method of a paraffin/iron tailings ceramic composite phase change energy storage material by melt infiltration
  • Preparation method of a paraffin/iron tailings ceramic composite phase change energy storage material by melt infiltration
  • Preparation method of a paraffin/iron tailings ceramic composite phase change energy storage material by melt infiltration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Iron tailings: The raw materials used in this example are muddy fine-grained iron tailings produced by Shouyun Mining Group Co., Ltd. in Miyun District, Beijing after iron ore selection in 2015. The particle size distribution is 0.1-160 μm, and the diameter is 2 , 14.7wt.%Fe 2 o 3 , 8.7wt.%MgO, 6.8wt.%Al 2 o 3 , 6.6wt.%CaO, 1.6wt.%K 2 O, 1.5wt.% other ingredients.

[0035]Paraffin wax: The phase change material used in this example is Kunlun brand paraffin wax produced by Daqing Petrochemical Company, with a melting point of 54~68˚C and a latent heat of phase change of 182.10J / g.

[0036] Weigh 45g of iron tailings powder, 90g of agate balls, and 55ml of deionized water, and put them into a ball mill tank for roller milling and mixing for 22 hours to prepare a slurry with a tailings content of 45wt.%. Weigh 5.5g of organic monomer, 0.55g of crosslinking agent and 0.8g of dispersant and inject into the slurry to continue ball milling for 2 hours. Weigh 0.1 g of foam...

Embodiment 2

[0042] Iron tailings: the raw materials used in this embodiment are the same as in embodiment 1.

[0043] Paraffin: used PCM is the same as embodiment 1 in the present embodiment.

[0044] Weigh 30g of iron tailings powder, 60g of agate balls, and 70ml of deionized water, put them into a ball mill tank and roller mill and mix for 6 hours to prepare a slurry with a tailings content of 30wt.%. Weigh 7g of organic monomer, 0.7g of crosslinking agent and 0.2g of dispersant and inject into the slurry to continue ball milling for 12 hours. Weigh 0.15 g of foaming agent and 0.04 g of foam stabilizer and inject into the slurry, and mechanically stir for 20 minutes at a stirring speed of 650 r / min for foaming. Weigh 1.75g ​​of catalyst and 0.3g of initiator into the foam-containing slurry and stir evenly. Pour the slurry into a glass mold. After the slurry gel is formed, it is demolded and dried. Put the formed green body into a muffle furnace, raise the temperature to 900°C for 2 ho...

Embodiment 3

[0047] Iron tailings: The raw materials used in this example are muddy fine-grained iron tailings produced by Shouyun Mining Group Company in Miyun District, Beijing after iron ore selection in 2016. Particles of 58 μm accounted for 90%, with an average particle size of 12.4 μm. The mass percentage of tailings composition is as follows: 56.3wt.%SiO 2 , 13.5wt.%Fe 2 o 3 , 9.6wt.%MgO, 8.9wt.%Al 2 o 3 , 7.2wt.%CaO, 2.8wt.%K 2 O, 1.7wt.% other ingredients.

[0048] Paraffin: used PCM is the same as embodiment 1 in the present embodiment.

[0049] Weigh 40g of iron tailings powder, 80g of agate balls, and 60ml of deionized water, put them into a ball mill tank and roller mill and mix for 12 hours to prepare a slurry with a tailings content of 40wt.%. 4g of organic monomer, 0.4g of crosslinking agent and 1.8g of dispersant were weighed and injected into the slurry to continue ball milling for 10 hours. Weigh 0.08g of foaming agent and 0.02g of foam stabilizer and inject into...

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Abstract

The invention discloses a paraffin / iron tailing ceramic composite phase change energy storage material and a melt and infiltration preparation method thereof. The composite material is prepared from the following raw materials in percentage by volume: 70 to 85 percent of paraffin and the balance of iron tailings. The composite phase change energy storage material provided by the invention has the advantages of high solid waste utilization rate, high phase change material content, high energy storage density, good mechanical property, low cost and the like; after large-scale application, the peak load shifting of energy sources can be realized; the pressure of the iron tailings on ecological environment is relieved; meanwhile, the heat conduction performance and the energy storage efficiency of the phase change material are effectively improved. The invention also discloses a melt and infiltration preparation method of the paraffin / iron tailing ceramic composite phase change energy storage material. The process parameters of the method are controllable; the operation is simple; the production period is short; products with complicated structures can be prepared.

Description

technical field [0001] The invention relates to the field of material science and engineering technology, in particular to a method for preparing a paraffin / iron tailings ceramic composite phase change energy storage material by melting and infiltration. Background technique [0002] In the field of industrial waste heat recovery, solar energy and other clean energy utilization, in order to better match the energy supply and demand time, the development and utilization of thermal energy storage materials are essential, among which latent heat energy storage is one of the most effective ways of thermal energy storage. Phase Change Material (PCM) is a material that utilizes the absorption and exothermic characteristics of substances during the phase transition process to store and release energy. Its large-scale application can significantly improve the efficiency of energy use. [0003] The sensible / latent heat composite energy storage material (Composite Energy Storage Mater...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/06C04B38/10C04B33/132C04B33/32
CPCC04B33/132C04B33/1328C04B33/32C04B38/10C04B2235/6023C04B2235/656C04B2235/6567C04B2235/658C09K5/063Y02P40/60
Inventor 周洋李润丰孙智勇郑涌李世波李翠伟
Owner BEIJING JIAOTONG UNIV
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