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<p>The dissolution behavior of complex inclusions in refining slag was studied using confocal laser scanning microscope. Based on the dissolution curve of complex inclusions, the main rate-limiting link of CaO–SiO<sub>2</sub>–Al<sub>2</sub>O<sub>3</sub> complex inclusions was the diffusion in the molten slag. The dissolution rate of CaO–SiO<sub>2</sub>–Al<sub>2</sub>O<sub>3</sub> complex inclusions was affected by the composition and size of inclusion. The functional relationship between the dimensionless inclusion capacity (<i>Zh</i>) and the dimensionless dissolution rate (<i>Ry</i>) of CaO–SiO<sub>2</sub>–Al<sub>2</sub>O<sub>3</sub> complex inclusions was calculated as <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="42243_2024_1405_Article_IEq1.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="175" /> </InlineMediaObject> <EquationSource Format="TEX">\(Ry = 2.10 \times 10^{ - 6} Zh^{0.160}\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>R</mi> <mi>y</mi> <mo>=</mo> <mn>2.10</mn> <mo>×</mo> <msup> <mn>10</mn> <mrow> <mo>-</mo> <mn>6</mn> </mrow> </msup> <mi>Z</mi> <msup> <mi>h</mi> <mrow> <mn>0.160</mn> </mrow> </msup> </mrow> </math></EquationSource> </InlineEquation>, while it was <InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="42243_2024_1405_Article_IEq2.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="175" /> </InlineMediaObject> <EquationSource Format="TEX">\(Ry = 2.49 \times 10^{ - 6} Zh^{0.087}\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>R</mi> <mi>y</mi> <mo>=</mo> <mn>2.49</mn> <mo>×</mo> <msup> <mn>10</mn> <mrow> <mo>-</mo> <mn>6</mn> </mrow> </msup> <mi>Z</mi> <msup> <mi>h</mi> <mrow> <mn>0.087</mn> </mrow> </msup> </mrow> </math></EquationSource> </InlineEquation> for Al<sub>2</sub>O<sub>3</sub>–CaO complex inclusions. On this basis, the complete dissolution time and rate of the complex inclusions were calculated by using the function relation between the <i>Zh</i> and <i>Ry</i> numbers.</p>

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In-situ observation on dissolution of CaO–SiO2–Al2O3 complex inclusions in refining slag

  • 期刊论文

  • 发表日期：

    2025年1月6日

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  • Yu-die Gu,
  • Ying Ren,
  • Li-feng Zhang

摘要

The dissolution behavior of complex inclusions in refining slag was studied using confocal laser scanning microscope. Based on the dissolution curve of complex inclusions, the main rate-limiting link of CaO–SiO2–Al2O3 complex inclusions was the diffusion in the molten slag. The dissolution rate of CaO–SiO2–Al2O3 complex inclusions was affected by the composition and size of inclusion. The functional relationship between the dimensionless inclusion capacity (Zh) and the dimensionless dissolution rate (Ry) of CaO–SiO2–Al2O3 complex inclusions was calculated as \(Ry = 2.10 \times 10^{ - 6} Zh^{0.160}\) R y = 2.10 × 10 - 6 Z h 0.160 , while it was \(Ry = 2.49 \times 10^{ - 6} Zh^{0.087}\) R y = 2.49 × 10 - 6 Z h 0.087 for Al2O3–CaO complex inclusions. On this basis, the complete dissolution time and rate of the complex inclusions were calculated by using the function relation between the Zh and Ry numbers.