CAJ | 학술논문

进行了超高碱度烧结,适宜工艺参数,不同SiO2含量,烧结强化措施的实验室试验研究.试验结果表明,在2.0～3.2范围内,随着碱度的上升,ISO转鼓指数上升,利用系数提高,烧结速度加快,成品率下降.在碱度2.0～2.8范围内,指标几乎成直线上升,碱度2.8以后部分指标开始出现下降趋势,碱度2.8是攀钢现有烧结矿的最适宜碱度.随着碱度的提高,烧结矿中钛赤铁矿与钛磁铁矿减少,铁酸盐含量增加,钙钛矿约有增加,硅酸盐变化不大.还原性与低温还原粉化率均得到改善,软化与熔融开始温度上升,软化区间与滴落区间减薄,有利于改善高炉透气性.在超高碱度2.8条件下,应用正交试验对工艺参数寻优,并进行了强化措施试验.在目前生产条件下有必要将碱度从2.4提高至2.8,SiO2为5.0%合适,根本途径在于钒钛精矿提铁降硅降钛.
진행료초고감도소결,괄의공예삼수,불동SiO2함량,소결강화조시적실험실시험연구.시험결과표명,재2.0～3.2범위내,수착감도적상승,ISO전고지수상승,이용계수제고,소결속도가쾌,성품솔하강.재감도2.0～2.8범위내,지표궤호성직선상승,감도2.8이후부분지표개시출현하강추세,감도2.8시반강현유소결광적최괄의감도.수착감도적제고,소결광중태적철광여태자철광감소,철산염함량증가,개태광약유증가,규산염변화불대.환원성여저온환원분화솔균득도개선,연화여용융개시온도상승,연화구간여적락구간감박,유리우개선고로투기성.재초고감도2.8조건하,응용정교시험대공예삼수심우,병진행료강화조시시험.재목전생산조건하유필요장감도종2.4제고지2.8,SiO2위5.0%합괄,근본도경재우범태정광제철강규강태.
The experiment was performed on superhigh basicity sintering,to find out reasonable pa-rameters, SiO2 contents, intensifying measures in laboratory, as a result of experiment, in the basicity range of 2.0～3.2, along with basicity rising, the ISO tumbler index and utilization cocfficient enhance, vertical velocity of sintering quicken, finished product rate descend. In the basicity 2.0～2.8, the index sign almost becomes line rising but parts of indexes went down after basicity exceeding 2.8, so 2.8 is the most reasonable basicity. With the increse of basicity, titanium magnetite and hematite content was de-creased, ferrite contents increased, perovskite increased a little, silicate don't greatly change, reducibility (RI) and low temperature breakdown index(RDI) was inpraved. Softerming and melting temperature were increased, cohesive zone and dropping zone were narrowed down improving the blast, furnace perme-ability.At a basicity of 2.8, an experiment for optimizing parameters by orthogonal method was performed. The results showed that it is neccessary to rise basicity from 2.4 to 2.8 production situation currently, the appropriate contents of SiO2 is 5.0% ,but the basic path is to rise TFe,lower SiO2 and TiO2 for V-Ti mag-netite concentrate.