Preparation and characterization of solar absorption and thermal storage integrated ceramics from calcium and iron-rich steel slag

Xu, Xin; Wang, Yuying; Wu, Jianfeng; Liu, Shaoheng; Ma, Shanshan; Cheng, Tiantian

doi:10.1016/j.ceramint.2022.10.370

Cited by 9 publications

(4 citation statements)

References 34 publications

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“…Al 2 O 3 in the steel slag is relatively high, which is 15.9 wt%. Steel slag contains SiO 2 and Al 2 O 3 , which can be used to prepare ceramics materials, Xiaohong Xu 12 successfully prepared ceramic materials with 97.89 wt.% steel slag. But the content of calcium oxide and iron oxide in steel slag is too high, which will affect the performance of ceramics materials.…”

Section: Methodsmentioning

confidence: 99%

Preparation of foamed ceramics from steel slag with high calcium and iron content

Zhang

et al. 2023

Int J Applied Ceramic Tech

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In this paper, steel slag foamed ceramics were fabricated by using steel slag, kaolin, feldspar, and quartz as main raw materials, and adding SiC as hightemperature foaming agent. The effects of steel slag content and SiC particle size on porosity and mechanical properties of foamed ceramics were researched.Results indicate that when content of steel slag is 40 wt%, and particle size of SiC is 20 µm, foamed ceramics exhibited optimized properties: water absorption rate of 2.59%, total porosity of 55.91%, bulk density of 1.33 g⋅cm −3 , and compressive strength of 1.21 MPa. The results show that with the increase of steel slag content, the phase composition of foamed ceramics changes, and foam process is hindered. The increase of steel slag content contributes to the formation of diopside. Fe 3+ , Fe 2+ in liquid phase enter into diopside by solid solution, the amount of liquid phase decreases. Liquid phase mass transfer slows down, and content of SiC in liquid phase decreases, so that the porosity decreases. At the same steel slag content, different SiC particle size affects the difference between pressure inside the closed pore and surface pressure, thereby the porosity changes.

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Section: Methodsmentioning

confidence: 99%

Preparation of foamed ceramics from steel slag with high calcium and iron content

Zhang

et al. 2023

Int J Applied Ceramic Tech

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“…7 The CSP has gradually become an efficient power generation technology. [8][9][10][11] The solar thermal absorber material is an integral material of CSP. To ensure the heliothermal conversion efficiency of the CSP, the thermal absorber material must have a high absorptivity, excellent thermal shock resistance, and low-cost processing.…”

Section: Introductionmentioning

confidence: 99%

“…The concentrated solar power (CSP) system features a high concentration ratio (>1000), 5 high operating temperature (>1000°C), 6 and high thermal efficiency (70%–80%) 7 . The CSP has gradually become an efficient power generation technology 8–11 …”

Section: Introductionmentioning

confidence: 99%

Preparation and thermal shock resistance of solar thermal absorbing corundum ceramics for concentrated solar power

Xu,

Liu,

Liu

et al. 2024

Int J Applied Ceramic Tech

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The absorptivity of solar thermal absorber materials affects the heliothermal conversion efficiency of concentrated solar power systems. The solar absorbing ceramics were prepared by the fixed mixture of bauxit, Fe2O3, and TiO2 with adding CuO in different percentages. The absorptivity and thermal shock resistance with the effect of adding CuO in different percentages were studied. Fe2O3 and TiO2 have excellent optical properties, and CuO decreases the material's band gap to boost the electronic transition and increase the material absorptivity. The results showed that the material is sintered at 1380°C with an excellent absorptivity of 94.00% in the spectrum range of 0.3–2.5 μm, and the bending strength is 132.94 MPa. The bending strength was increased by 21.07% after 30 thermal shock cycles (1000°C‐room temperature, air cooling). The liquid phase facilitates the synthesis of hercynite with excellent high temperature properties. The hercynite improves the thermal shock resistance of the material.

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“…The resulting sample had the total porosity of 67.22%, the bulk density of 0.821 g cm −3 , the thermal conductivity of 0.08 W/ (mK), and the compressive strength of 29.98 MPa. Xu et al [19] prepared foam ceramics using steel slag and found that the increase in slag content contributed to the formation of diopside. The size of SiC impacts intra-pore and surface pressures, resulting in a change in porosity.However, these still can not solve the problem of low utilization rate of steel slag, complex technology and high cost and price, there is an urgent need to find other ways to solve the problem of steel slag to promote large-scale, resource recycling of steel slag.…”

Section: Introductionmentioning

confidence: 99%

New environmentally friendly substance formulation based on steel slag for the manufacture of stoneware

Zhou,

Wang,

et al. 2023

Mater. Res. Express

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In this paper, stoneware was prepared using steel slag shale as the main raw material. A typical ceramic sintering procedure was used to evaluate the effects of a sintering temperature of 1050~1130 °C on the linear shrinkage, water absorption, bulk density, and flexural strength parameters of stoneware samples. The stoneware samples were characterized by XRF, XRD, and SEM. The results showed that the performance of the steel slag content of 40% at sintering temperature of 1110°C was better than the other samples. The main phases of the sample are composed of the quartz phase, the pyroxene phase, and the anorthite phase. Among them, the water absorption rate is 1.36%, the linear shrinkage rate is 11.36%, the bulk density is 2.46 g/cm3, and the flexural strength is 71.13 Mpa. Anorthite and pyroxene improve the bending strength of stoneware samples, which is realized by the prestress mechanism.

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Preparation and characterization of solar absorption and thermal storage integrated ceramics from calcium and iron-rich steel slag

Cited by 9 publications

References 34 publications

Preparation of foamed ceramics from steel slag with high calcium and iron content

Preparation of foamed ceramics from steel slag with high calcium and iron content

Preparation and thermal shock resistance of solar thermal absorbing corundum ceramics for concentrated solar power

New environmentally friendly substance formulation based on steel slag for the manufacture of stoneware

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