However , in the area with strong magma mingling , there are widespread abnormal fabrics , distinguished differences in the idiomophic - textures and the peritectic reaction , poililitic texture , metasomatism among the minerals , metasomatic border , embayment , rimmed structure , abnormal plagioclase zoning , relict fabric as well as the acicular apatite are very common 岩石的异常结构构造十分发育，矿物之间自形程度差异显著，常见包晶反应、包含结构、交代边、熔蚀边、交代蚕食的港湾状结构构造及交代缝合线、矿物镶边、斜长石异常环带和矿物残留等，多见指示岩浆混合的标志性矿物针状磷灰石。
Based on the summarization of current situation of fluorine - free mould fluxes at home and abroad , the main problem during decreasing fluorine for high carbon steel and peritectic steel mould fluxes was analyzed , which includes the stability between viscosity and temperature at high temperature as well as effective control of crystallization properties 摘要综述了国内外无氟连铸结晶器保护渣发展状况，分析了目前高碳钢和包晶钢（特别是亚包晶钢）用保护渣降氟过程中面临的主要问题：高温时粘度温度特性的稳定性以及保护渣结晶性能的有效控制。
