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Prediction of the Melting Paths of Wollastonite-Containing Compositions

China's Refractories 2020年第3期29卷 13-18页

作者： Sergey M.LOGVINKOV Ihor A.OSTAPENKO Oksana N.BORISENKO Olga B.SKORODUMOVA Andriy A.IVASHURA Kharkiv National University of Economics named after Semen Kuznets KharkivUkraine PSC“Druzhkovka Refractory Plant” DruzhkovkaUkraine National University of Civil Defence of Ukraine KharkivUkraine

The article analyzed the main groups of thermal insulation(TIM)and slag-forming(SFM)mixtures produced by leading foreign companies:acidic ones based on the SiO2–Al2O3 system,basic ones based on the CaO–MgO–Al2O3 system and medium basic ones based on the CaO(MgO)system–Al2O3–*** is shown that achieving the necessary properties of the SFM and TIM requires strict observance of the mass content of the components of mixtures produced on the basis of synthetic materials in granular form with a given *** with a given composition and dispersion is associated with the need to provide a given melting temperature(for intermediate ladles 1250–1450℃,for molds 950–1150℃),neutrality to the cast metal,protection of the melt from secondary oxidation,minimization of heat loss from the melt mirror,absorption of non-metallic inclusions of various natures(Al2O3,CaO,SiO2,TiO2,less often MgO-containing)and sizes;as well as a number of specific requirements:compatibility with the working layer of the lining of the bucket,maintaining the work of the stoppers,minimizing harmful gaseous emissions,*** is known that Al2O3,TixOy,and CaO refractory inclusions in steel cause the majority of defects on the surface of a cold-rolled sheet,therefore,the aim of the work was to analyze the physicochemical regularities and melting paths of the wollastonite-containing compositions during the assimilation of nonmetallic inclusions by *** analyze the melting paths of the wollastonite-containing compositions in the CaO–Al2O3–SiO2 system,a diagram of the primary crystallization field of anorthite and the adjacent boundary curves is shown,indicating the directions of temperature drop and designating invariant *** presented scheme adequately reflects the topological regularities of the state diagram of the CaO–Al2O3–SiO2 *** analyze the melting paths of the wollastonite-containing SFM compositions during the assimilation of TiOx impurities from steel melts,a diagram of

关键词： wollastonite-containing compositions slag-forming mixtures heat-insulating mixtures solid-phase interaction

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