膨润土同步提纯钠化研究及在球团中应用  

Study on Simultaneous Purification and Sodium Modification of Bentonite and Its Application in Pelletizing

作　　者：马磊 李兴旺 张玖畅 杨涛[1] 龙红明[1,2] MA Lei;LI Xingwang;ZHANG Jiuchang;YANG Tao;LONG Hongming(Anhui University of Technology,Ma'anshan 243032,Anhui,China;Anhui Province Key Laboratory of Metallurgical Engineering&Resources Recycling,Ma'anshan 243032,Anhui,China)

机构地区：[1]安徽工业大学,安徽马鞍山243032 [2]冶金工程与资源综合利用安徽省重点实验室,安徽马鞍山243032

出　　处：《鞍钢技术》2024年第2期19-25,共7页Angang Technology

基　　金：安徽省自然科学基金杰青项目资助项目(2208085J19)。

摘　　要：基于某企业生产的低品质钙基膨润土,采用多重钠化工艺进行提质改性,系统研究了多重钠化剂种类及用量对膨润土性能指标和收得指标的影响。结果表明,在钠化剂Na2CO3用量为2.0%时,钠化土的收得率为83.55%,其膨胀指数、吸水率和吸蓝量分别由原土的5.0 mL/g、119%/(2 h)和26.9 g/(100 g)提升到22 mL/g、377.1%/(2 h)和39.6 g/(100 g),达到一级钠化土指标。采用多重钠化改性工艺可以显著提升膨润土指标,钠化剂配比为2.0%Na6P6O18和2.0%Na2CO3时,双重钠化土的膨胀指数为77 mL/g,吸水率为631.8%/(2 h),吸蓝量为39.1 g/(100 g),收得率为61.29%。造球实验中添加量为1.8%时,生球落下强度由原土的3.0次/(0.5 m)分别提高至一次钠化土的4.6次/(0.5 m)和双重钠化土的8.6次/(0.5 m)。Based on the low-quality calcium-based bentonite produced by an enterprise,the effect of multiplex sodalizer types and dosages on the performance indexes and yield indexes of bentonite was systematically investigated by carrying out the quality improvement and modification with multiplex sodiation process.The study results showed that when the dosage of sodalizer Na2CO3 was 2.0%,the yield of sodalized bentonite was 83.55%and its expansion index,water absorption and blue absorption were respectively increased from their original 5.0 mL/g,119%/(2 h)and 26.9 g/(100 g)to 22 mL/g,377.1%/(2 h)and 39.6 g/(100 g),which got the first grade indicator for sodiium bentonite.So the bentonite index could be significantly improved by using multiplex sodiation modification process,while the sodalizer ratios were 2.0%Na6P6O18 and 2.0%Na2CO3,the expansion index of double sodium bentonite was 77 mL/g,water absorption was 631.8%/(2 h),blue absorption was 39.1 g/(100 g),and the yield was 61.29%.In practice of pelletizing,when the addition of sodalizer Na2CO3 was 1.8%,the drop strength of green pellets increased to 4.6 times/(0.5 m)from original bentonite 3.0 times/(0.5 m)for the primary sodium bentonite and 8.6 times/(0.5 m)for the double sodium bentonite respectively.

关 键 词：膨润土 沉降法 多重钠化 改性 球团 

分 类 号：TF5[冶金工程—钢铁冶金]