高硅镁质熔剂性球团焙烧试验研究

Experimental Study on Roasting of High Silica Magnesium Flux Pellet

球团冶金性能的好坏直接关系到高炉是否顺产,质量好的熔剂性球团可以起到提产降耗作用。为探明SiO_2、碱度及MgO含量对球团粘结率及抗压强度的影响规律,以唐钢生产所用三种磁铁矿为原料,通过添加白灰调节碱度,添加白云石调节MgO含量,调节三种铁矿粉不同配比调节SiO_2含量,进行了球团焙烧试验。研究发现,焙烧球团的粘结率随着SiO_2含量及碱度的提高而升高,随着MgO含量提高而降低。而球团强度随着SiO_2含量及碱度提高呈先上升后下降的趋势,随MgO含量的提高呈下降趋势。

The quality of the pellet metallurgy is directly related to whether the blast furnace is in good condition,and the good quality flux pellets can play a role in improving production and reducing consumption.In order to find out the influence of SiO2,alkalinity and MgO content on pellet bondage and compressive strength,three kinds of magnetite used in Tangshan Iron and Steel Co.,Ltd.were used as raw materials,and alkalinity was adjusted by adding white ash,and dolomite was added to adjust MgO content.The SiO2 content was adjusted by adjusting the ratio of the three iron ore fines,and the pellet baking experiment was carried out.It is found that the bonding rate of the calcined pellets increases with the increase of SiO2 content and alkalinity,and decreases with the increase of MgO content.The pellet strength increased first and then decreased with the increase of SiO2 content and alkalinity,and decreased with the increase of MgO content.