含硼添加剂改善烧结矿质量的实验研究  

Experimental Study on Improving Quality of Sintered Ore by Adding Boric Acid

作　　者：周东辉[1] 孙挺[1] 白丽群[1] 

机构地区：[1]东北大学理学院,辽宁沈阳110004

出　　处：《东北大学学报（自然科学版）》2004年第5期439-441,共3页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(59774017)

摘　　要：含铁原料在高炉上部的物理粉化对高炉稳定性有显著影响·烧结矿还原时,在400～600℃的温度范围内粉化明显·为了提高烧结矿质量,抑制热烧结矿在降温过程中因为相变引起的粉化现象,对烧结配料进行了添加硼酸的实验研究,同时通过转鼓实验、粒度分布及X射线衍射实验对实验结果进行了分析·结果表明,在烧结原料中添加硼酸可以改变烧结矿中的物质组成,当每1t原料添加0 6～1 2kg硼酸时,烧结矿粉化现象得到了抑制,强度得到了提高,而且对烧结工艺无影响·The iron-containing raw materials affect greatly the stability of blast furnace when they are pulverized at the upper part of the furnace, especially the sintered ore is pulverized in the deoxidizing process at 400～600 ℃. To improve the quality of sintered ore and suppress the pulverization due to phase transition in temperature falling process, an experiment was conducted to use boric acid as additive into the mixture to be sintered. Then the experimental results are analyzed and discussed via drum test, granule size distribution and XRD. It was revealed that adding boric acid properly into the mixture can change the microstructure and strength of sintered ore, i.e., 06～12 kg boric acid per each 1 t of the mixture. As a result, the pulverization can be suppressed so as to improve the strength of sintered ore without any change needed in sintering procedure.

关 键 词：烧结矿 添加剂 硼酸 粉化 相变 

分 类 号：TF52[冶金工程—钢铁冶金]