Steel slag modified energy storage materials

Can steel slag be used as a heat storage medium?

Using steel slag to prepare high-temperature (>500 °C) PCMs was an effective way to achieve its high value-added utilization as a potential heat storage medium in a variety of applications, such as solar energy storage, power peak shaving, and industrial waste heat recovery.

Why is steel slag important?

Steel slag meets thehigh thermal stability of matrix materials and has a low cost. Suppose steel slag is used as the carrier of phase change materials. In that case, it is of great significance to improve the utilization rate of resources, protect the environment and reduce the preparation cost of heat storage materials.

Does modified steel slag improve thermal conductivity of pure NaCl-KCl salt?

Therefore, the modified steel slag could greatly improve the thermal conductivity of pure NaCl-KCl salt, which was greatly beneficial to shortening the heat charging and discharging process in their practical applications. Fig. 9. Thermal conductivity of M−3/salt and M−5/salt C-PCMs. 3.2.3. Thermal cycling stability

Is steel slag a potential matrix material?

Moreover, steel slag also uses its porous surface structure to prepare adsorbents to remove phosphate, sulfate, or heavy metals in an aqueous solution . Therefore,steel slag is a potential matrix material. At present, the coverage of C-PCMs phase transition point is very narrow.

Does steel slag have a good chemical compatibility with salts?

The results indicated that steel slag had a good chemical compatibility with the above two salts. Additionally, the skeleton material of steel slag helped to reduce the sub-cooling of NaNO 3 and Na 2 SO 4 by 4.53 °C and 0.79 °C, respectively, and improve their thermal conductivity by 54.9 % and 82.4 %, respectively.

What is Cfa modification in steel slag?

CFA modification (1100 °C) could help to transform the amorphous phase, lime, and wustite in steel slag into the stable phase of gehlentite, anorthite, magnetite, thus greatly improving the chemical compatibility between steel slag and eutectic salt. Steel slag modified with 30 wt% CFA was proved to be the optimum skeleton material.