Use of Recycled Calcium Slag for Clean Steel Refining

Dong Ping Zhan; Hui Shu Zhang; Wei Gong; Zhou Hua Jiang; Ji Cheng He

doi:10.4028/www.scientific.net/MSF.620-622.635

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Effect on Compressive Strength by Mixing Ratio of MSWI Melting Slag/Bottom Ash
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Use of Recycled Calcium Slag for Clean Steel Refining
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Adsorption of Phosphate from Aqueous Solution with Blast Furnace Slag Activated by Hydrated Lime as Sorbent
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Investigation of Electronic Structures of F-Doped TiO₂ by First-Principles Calculation
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Indium-Sensitized UV Photocatalysts Made from Alkali Titanate Microfibers
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HomeMaterials Science ForumMaterials Science Forum Vols. 620-622Use of Recycled Calcium Slag for Clean Steel...

Use of Recycled Calcium Slag for Clean Steel Refining

Abstract:

Calcium slag (CS) is a by-product generated during smelting to extract calcium metal from the ore by aluminothermic reduction method. The melting point, melting speed, viscosities, surface tensions and the refining effects of CS and normal premelted refining slag (NPRS) were measured in the laboratory. Then the plant trials were done in a 150 tons Ladle Furnace (LF) in a steelmaking plant during the refining of clean steel. The results show that the properties of CS are similar to those of NPRS, and CS is a good refining agent not only in laboratory experiment but also in industrial production. By using CS, the average final sulfur content in X70 pipeline steel reaches 25×10-6; the total oxygen content in GCr15 bearing steel is 5×10-6~8×10-6; the titanium content in GCr15 bearing steel is less than 20×10-6 and lower than the steels refined by using NPRS.