碳碱法加工硼铁矿的反应过程研究  

Study on process of ludwigite ore with CO_2-soda method

作　　者：亓峰[1] 于天明 仲剑初[1] 王洪志[1] 

机构地区：[1]大连理工大学化工学院,辽宁大连116024 [2]山东药品食品职业学院,山东威海264200

出　　处：《化工矿物与加工》2011年第7期11-14,32,共5页Industrial Minerals & Processing

摘　　要：分别以NaHCO3和CO2+Na2CO3为分解剂,研究了硼铁矿碳解反应过程。以NaHCO3为分解剂时,随着NaHCO3用量的增加,碳解率增大,当加入量为40 gNaHCO3/100 g矿时,碳解率可达78%。以CO2+Na2CO3为分解剂时,考察了各种因素对碳解反应的影响,液固比和添加二乙醇胺对碳解反应影响较小,在135℃下,加入12.6 g Na2CO3/100 g矿,反应10 h,碳解率可达75%。矿渣XRD分析表明:无论是利用NaHCO3还是CO2+Na2CO3分解硼铁矿,适量时均有MgCO3生成,过量时还有Na2Mg(CO3)2复盐生成。In this paper,the reactions of ludwigite ore with NaHCO3 or CO2 ＋Na2CO3 were investigated,respectively.The influence of NaHCO3 on the leaching process was investigated and the highest leaching ratio of B2O3 was 78%,when 40 gNaHCO3/100 g minerals were added.On the other hand,the process of ludwigite ore treated by CO2＋soda was also discussed.The results indicated that there is little effect of liquid solid ratio and diethanolamine addition on the process,the highest leaching ratio of 75% was obtained at 135 ℃ for 10 h when 12.6 g Na2CO3/100 g minerals was added.The XRD characterizations of the leaching slag in the process demonstrated that MgCO3 was found in the slag when suitable amounts of NaHCO3 or CO2＋soda was added,and Na2Mg（CO3）2 also appeared in the slag when NaHCO3 or Na2CO3 was added excessively.

关 键 词：硼铁矿 碳碱法 Na2Mg(CO3)2 

分 类 号：TQ128.54[化学工程—无机化工]