利用硫酸铵焙烧工艺提取硼精矿中的硼  

Boron Extraction from Boron-Concentrate Ore by Ammonium Sulfate Roasting Method

作　　者：段华美[1] 吕晓姝[1] 宁志强[1] 翟玉春[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2011年第12期1724-1728,共5页Journal of Northeastern University(Natural Science)

基　　金：国家重点基础研究发展计划项目(2007CB613603);格平绿色助学行动辽宁环境科研"123工程"(CEPF2008-123-2-2)

摘　　要：为了更加合理有效地利用硼精矿,以辽宁硼铁矿经磁选得到的硼精矿为原料,采用硫酸铵焙烧的方法处理得到熟料,将熟料加水溶出、固液分离得到含硼溶液和提硼渣,含硼溶液用于提取硼酸,提硼渣可用于提取SiO2和MgO.通过单因素实验考察了焙烧温度、焙烧时间、铵矿比对B2O3浸出率的影响.通过正交试验得到提取B2O3的适宜工艺条件为:焙烧温度400℃,焙烧时间90 min,铵矿比1.6,该条件下B2O3的浸出率可达85%以上.对原料及提硼渣进行化学成分和物相组成分析,结果表明本工艺可使大部分硼化物生成可溶物并被提取出来,可实现硼精矿的绿色综合利用.In order to reasonably use the boron-concentrate ore from magnetic separation of Liaoning ludwigite,the raw samples were roasted with ammonium sulfate.Then the roasted materials were separated by filtration after being dissolved into water.The boron-rich solution was used to recover boron acid while the remaining residue was used as a raw material for SiO2 and MgO recovery.Single factor experiments were conducted to study the influences of roasting temperature,roasting time and ammonium/ore ratio on the leaching rate of B2O3.The reasonable conditions obtained by orthogonal test are： roasting temperature of 400 ℃,roasting time of 90 min,and ammonium/ore ratio of 1.6.Under such conditions,the leaching rate of B2O3 is over 85%.The chemical composition analysis and XRD results show that,this method can extract the majority of soluble boron from boron-concentrate ore,and thereby realize the eco-friendly comprehensive utilization of boron-concentrate ore.

关 键 词：硼精矿 硫酸铵 焙烧 硼铁矿 硼酸 

分 类 号：TQ128[化学工程—无机化工]