不同炉料C还原软化熔融及成渣过程

The softening-melting and slag forming process of the different ferrous burden materials reduced by carbon

为直接观察不同炉料软化熔融及成渣过程,本试验采用了卧室高温可视反应炉,全面记录了试样在试验过程中的变化,并观察到含铁炉料在高温下软熔及成渣行为,本试验研究了4种单类含铁炉料及2种混合炉料还原软化熔融及成渣过程,得到试验过程直观图像,采用矿相解离分析仪分析生成物质的物相组成。结果表明,不同类型含铁炉料C还原形成的渣相中物相组成差异很大,高碱度烧结矿主要形成CaO-SiO_2-Al_2O_3-FeO-MgO五元系渣,球团矿形成SiO_2-Al_2O_3-FeOCaO四元系渣,块矿形成FeO-SiO_2二元系渣;试验中有气泡生成现象,该气泡生成现象反应了初渣的高温物理性能,渣相中FeO含量越高,其与内生气源生成气泡能力越强。

In order to directly observe the softening-melting and slag forming process of different furnace burden, this research adopted the high temperature visual reaction furnace, which fully recorded the change of the sample during the test, and the softening-melting and slag forming process of the furnace burden at high temperature. In this study, four kinds of single-type furnace burden and two kinds of mixed furnace burden were studied. The intuitive image of the test process was obtained. The phase composition of the material was analyzed by the dissociation analyzer. The results show that the phase composition of the slag phase formed by different furnace burden is very different. The high-alkali sintered ore mainly forms CaO -SiO2 -Al2O3 - FeO - MgO five-element slag and the pellets form SiO2 - FeO - CaO quaternary slag and lumps to form FeO - SiO2 binary slag. There was a bubble generation phenomenon in the experiment. The bubble generation phenomenon reflects the high temperature physical properties of the primary slag, and the higher FeO content in the slag phase, the stronger the ability to generate bubbles with endogenous gas.