The relationship between melt structure and viscosity: the effect of different fluxes on CaO–SiO2 slags
The relationship between melt structure and viscosity: the effect of different fluxes on CaO–SiO2 slags
复制标题
熔体结构与粘度的关系：不同熔剂对CaO·SiO2渣的影响
DOI：
10.1515/ijcre-2021-0293
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发表时间：
2022-02
影响因子：
1.6
通讯作者：
Maofa Jiang
中科院分区：
文献类型：
--
作者：
Xiaobo Zhang;Chengjun Liu;Maofa Jiang
抽象。Na_2O、CaF_2、B_2O_3是冶金炉渣中常用的熔剂。这些熔剂降低渣系粘度的作用与改变熔体结构有关.采用分子动力学模拟方法，分析了Na 2 O、CaF 2和B2 O3对传统CaO-SiO2冶金渣系熔体结构的主要影响。结果表明，由于Na+离子只有一个电荷，多电荷离子和解聚的[SiO 4]4−四面体之间的静电约束不能发生在Na+离子上。熔体结构中的颗粒的整体流动性的改善与Ca 2+与Na+的替代。因此，CaO-SiO2-Na 2 O渣系的流动性比CaO-SiO2渣系的流动性强，粘度降低。F−离子主要与Ca 2+离子结合形成复合物。生成的Ca-F结构破坏了Ca 2+离子与Ca-O结构中解聚[SiO 4]4−四面体之间的静电束缚，改善了CaO-SiO2-CaF 2渣系的流动性。B_2O_3对CaO-SiO_2熔体结构的影响与碱度有关。在本研究中，当碱度值为1.87时，B2 O3的加入增加了CaO-SiO2熔体结构的聚合度，并且粘度可能增加。
Abstract. Na2O, CaF2, B2O3 are commonly used fluxes in metallurgical slags. These fluxes reduce the viscosity of slags are related to changing the melt structures. In this study, molecular dynamics simulation was used to analyze the main effects of Na2O, CaF2, and B2O3 respectively on the melt structure of the traditional CaO–SiO2 metallurgical slags. The results showed that since Na+ions have only one charge, and the electrostatic restraint between the multi-charged ions and the depolymerized [SiO4]4− tetrahedrons cannot occur on Na+ions. The overall mobility of the particles in the melt structure is improved with the replacement of Ca2+ with Na+. Therefore, the fluidity of CaO–SiO2–Na2O slags is stronger than that of CaO–SiO2, and the viscosity is reduced. F− ions mainly bond with Ca2+ ions to form complexes. The resulting Ca–F structures destroy the electrostatic restraint between Ca2+ ions and depolymerized depolymerized [SiO4]4− tetrahedrons in the Ca–O structures, and the fluidity of CaO–SiO2–CaF2 slags are improved. The effect of B2O3 on the melt structure of CaO–SiO2 is related to the basicity. In this study, when the value of basicity is 1.87, the addition of B2O3 increases the degree of polymerization of the CaO–SiO2 melt structure, and the viscosity may increases.
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影响因子：
1.8
作者：
K. Ko;J. Park
通讯作者：
K. Ko;J. Park
影响因子：
3.9
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