A kind of phase change thermal storage self-flowing refractory castable and preparation method thereof

Abstract

The invention relates to a phase change thermal storage self-flowing refractory castable and a preparation method thereof. Its technical scheme is: with 55-75 parts by mass of bauxite particles, 10-30 parts by mass of bauxite fine powder, 6-10 parts by mass of α-alumina powder, 1-3 parts by mass of silica micropowder and 4-3 parts by mass 6 parts by mass of calcium aluminate cement is used as a raw material and mixed to obtain a mixture. Add 0.1-0.3 parts by mass of water reducer and 6-7 parts by mass of water to the mixture, and stir evenly to obtain an alumina-based self-flowing castable; then add 55-75 parts by mass of alloy@ceramic large The capsule particles are accumulated in the mold to obtain a castable skeleton; then, the alumina-based self-flowing castable is poured into the castable skeleton to obtain a phase-change thermal storage self-flowing refractory castable. The process of the invention is simple, and the prepared phase change thermal storage self-flowing refractory castable has high thermal storage density, high strength, good thermal shock resistance, high thermal efficiency and stable temperature when used at high temperature.

Description

technical field [0001] The invention belongs to the technical field of self-flowing refractory castables. In particular, it relates to a phase change thermal storage self-flowing refractory castable and a preparation method thereof. Background technique [0002] With the development of human society and economy and the increase of energy consumption, the development of new energy and the improvement of energy utilization efficiency have become the focus of research and development in various countries. The use of heat storage materials to achieve the balance between energy supply and demand can effectively improve energy utilization efficiency and achieve the purpose of energy conservation and environmental protection. It has broad application prospects in many fields such as energy, aerospace, construction, agriculture, and chemical industry. [0003] Heat storage materials usually store thermal energy in three ways: sensible heat storage, latent heat storage, and chemical...

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Problems solved by technology

For example: (1) "A phase-change thermal storage material for medium temperature and its preparation method" (CN104559936A) patented technology, using oxalic acid as thermal storage material, rare earth oxide as heat-resistant modifier, and graphite as thermal conductivity enhancing material , the prepared heat storage material has good thermal conductivity and thermal stability, but the use temperature is low, so it cannot be used for the utilization of high temperature heat energy

(2) "Preparation of a high-temperature phase-change heat storage material with a core-shell structure" (CN109054758A) patented technology, adding aluminum powder to a nickel chloride solution, adding ammonium fluoride solution dropwise, and roasting to obtain a core-shell structure Al@NiO-Al 2 o 3 High temperature phase change heat storage material, prepared Al@NiO-Al 2 o 3 Although high-temperature phase-change thermal storage materials have a large heat of fusion and high thermal conductivity, nickel salts are carcinogenic and harmful to the human body, which limits their applications.

(3) "Preparation of a high-temperature phase-change thermal storage material with a core-shell structure" (CN106367035A) patented technology, using NaCl as a phase-change material to prepare a high-temperature phase-change thermal storage material with a phase transition temperature of 800°C, but the high temperature Low NaCl molten salt has strong corrosiveness, and its thermal conductivity is low, and its ability to control temperature is insufficient

The commonly used refractory castables are mainly heat storage, low heat storage density, and do not have the ability to control temperature