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
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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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