A kind of solid heat storage material and its preparation method and application

A solid heat storage and raw material technology, applied in the field of high temperature materials, can solve the problems of excessive heat release, the solid heat storage electric heater cannot meet the demand for heat release during the day, and the heat release is not ideal, and achieves high specific heat and enhances human control. good thermal shock stability

Active Publication Date: 2019-09-20
LIAONING ZHONGMEI HIGH TEMPERATURE MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main component of existing solid heat storage materials is magnesia. According to the current production process, processing from magnesite ore to magnesia heat storage bricks can no longer meet the existing market demand, and the existing heat storage bricks, 200 The temperature conductivity coefficient of ℃ is 2.8w / ㎡.s, the heat release is too fast, and the solid heat storage electric heater cannot meet the heat release demand during the day
The thermal conductivity coefficient at 900°C is 0.9w / ㎡.s, and at the high temperature range of 800-1000°C, the heat release under human intervention is very unsatisfactory

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Solid heat storage material, the weight parts of its raw materials are: 30 parts of iron ore, 10 parts of cement kiln waste magnesia-iron bricks, 10 parts of aluminum nitride, 10 parts of iron scale, 20 parts of silicon carbide dust removal powder, 2 parts of beryllium nitride 2 parts, 2 parts of boron mud, 2.5 parts of sodium hexametaphosphate, 1.4 parts of magnesium-aluminum high-efficiency cementing agent and 2.8 parts of water.

[0017] The preparation method of the solid thermal storage material comprises the following steps.

[0018] (1) Weigh each raw material according to the weight of the constituent raw materials, firstly crush the iron ore and the bottom waste of the submerged arc furnace into particles with a particle size of 3-5mm, and set aside; Particles of 1-3mm are for use; (3) SiC dust removal powder is ground into powder with a fineness of 200 mesh for use; (4) Iron and phosphorus are crushed into 1-5mm particle size for use; (5) Merge (1) (2 ) (3) (...

Embodiment 2

[0022] Solid heat storage material, the parts by weight of its raw materials are: 5 parts of iron ore, 30 parts of cement kiln waste magnesia-iron bricks, 15 parts of iron scale, 20 parts of silicon carbide dust removal powder, 15 parts of aluminum nitride, 5 parts of beryllium nitride 1 part, 2 parts of boron mud, 1.5 parts of sodium hexametaphosphate, 1 part of magnesium-aluminum high-efficiency cement and 4 parts of water.

[0023] The solid heat storage material data that above-mentioned embodiment 2 makes: caustic soda 0.13%, SiO 2 46.52%, SiC 9.13%, Fe 2 o 35.01%, MgO 38.25%, CaO 0.96%. Bulk density 3.16g / cm³, normal temperature compressive strength (110℃x24h) 108.32MPa; specific heat capacity (100℃) 1.01Kj / (kg.k), (400℃) 1.08Kj / (kg.k), (700℃) 1.16Kj / (kg.k), thermal conductivity (100°C) 19.5w / (m.k), (400°C) 17.4w / (m.k) (700°C) 16.8w / (m.k).

[0024] The heat storage bricks have uniform particle distribution, good shape, and no cracks on the surface; after drying, no h...

Embodiment 3

[0026] Solid heat storage material, the parts by weight of its raw materials are: 5 parts of iron ore, 50 parts of cement kiln waste magnesia-iron bricks, 10 parts of silicon carbide dust removal powder, 10 parts of iron scale, 5 parts of aluminum nitride, 1 part of beryllium nitride 2 parts, 2 parts of boron mud, 1 part of sodium hexametaphosphate, 2 parts of magnesium-aluminum high-efficiency cementing agent and 3.5 parts of water.

[0027] The data of the solid heat storage material prepared above: caustic soda 0.23%, SiO 2 14.02%, Al 2 o 3 1.13%, Fe 2 o 3 16.01%, MgO 66.35%, CaO 2.20%, others 0.06%; bulk density 3.22g / cm³, room temperature compressive strength (110℃*24h) 68.32MPa; specific heat capacity (100℃) 1.08Kj / (kg.k), ( 400°C) 1.12Kj / (kg.k), (700°C) 1.21Kj / (kg.k), thermal conductivity (100°C) 10.3w / (m.k), (400°C) 4.6w / (m.k) (700 °C) 3.4w / (m.k).

[0028] The heat storage bricks have uniform particle distribution, good shape, and no cracks on the surface; after ...

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Abstract

The invention belongs to the field of high temperature materials, and in particular, relates to a solid heat storage material, and a preparation method and an application thereof. The solid heat storage material comprises the following raw materials in parts by weight: 5-95 parts of iron ore, 5-50 parts of magnesium iron bricks, 5-20 parts of iron scales, 5-20 parts of a silicon carbide dedusting powder, 1-20 parts of aluminum nitride, 1-5 parts of beryllium nitride, 0.5-5 parts of boron mud, 1-2.5 parts of sodium hexametaphosphate, 1-2 parts of a magnesium aluminum high temperature cementing agent and 1-4 parts of water. The material is low in cost and high in specific heat; and the value of the thermal conductivity coefficient is adjusted according to different ingredient ratios, so as to meet the requirements of different heat storage devices.

Description

technical field [0001] The invention belongs to the field of high-temperature materials, and in particular relates to a solid heat storage material and its preparation method and application. Background technique [0002] In recent years, as the phenomenon of smog weather in various parts of our country has become increasingly serious, reducing or even eliminating the PM2.5 index has become the focus of the work of the environmental protection department. The smog weather not only brings a lot of inconvenience to people's daily life, but also seriously harms people's health. healthy. Studies have shown that there are six important sources of PM2.5, namely soil dust, coal burning, biomass burning, vehicle exhaust and waste incineration, industrial pollution and secondary inorganic aerosols, of which coal burning accounts for about 18%. Coal burning pollution has had a huge impact on the formation of smog weather. In order to reduce coal-burning pollution in winter and impro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/14
Inventor 杨洪茂崔学政关彦郭建付丽付刚苏德华
Owner LIAONING ZHONGMEI HIGH TEMPERATURE MATERIAL CO LTD
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