摘要
本文采用一种化工产品对粉煤灰酸法提取氧化铝过程料液中的磷、硅进行去除研究,通过机理分析及工艺条件优化,解决了酸浸液中磷和硅去除的难题。研究表明:在精制液II中,加入二氯氧化锆的浓度为1.10 g/L,温度50℃,时间30 min,转速200 r/min的工艺条件下,药剂对磷和硅的去除率分别可达到88.64%和66.22%。采用准一级和准二级动力学模式拟合,二氯氧化锆对磷和硅的吸附行为符合准一级动力学模式,说明二氯氧化锆对磷和硅的吸附以物理吸附作用(静电吸附)为主。该药剂对磷有较高的吸附容量,平衡吸附容量达到106.73 mg/g,优于已报道吸附材料对磷的吸附。该研究成果为神华准能正在进行的粉煤灰酸法提取氧化铝工业化实施提供技术支持,同时也可推广应用于类似废水中磷和硅的去除。
In this paper, a kind of chemical product is used to remove phosphorus and silicon in the process of acid extraction of alumina from fly ash, through mechanism analysis and optimization of process conditions, which solves the problem of phosphorus and silicon in the acid leaching solution. The results show that the removal rates of phosphorus and silicon can reach 88.64% and 66.22% respectively when the concentration of added zirconium oxychloride is 1.10 g/L, the temperature is 50 ℃, the time is 30 min and the speed is 200 r/min in the refined solution II. Using pseudo-first-order and pseudo-second-order kinetic model fitting, the adsorption behavior of zirconium oxychlorideon phosphorus andsilicon conforms to the pseudo-first-order kinetic model, indicating that the adsorption of zirconium oxychlorideon phosphorus and siliconare mainly physical adsorption(electrostatic adsorption). It has a high adsorption capacity for phosphorus, and the equilibrium adsorption capacity reaches 106.73 mg/g, which is better than the adsorption materials that have been reported for phosphorus.The research results provide technical support for Shenhua Group′s ongoing industrial implementation of acid extraction of alumina from fly ash, and can also be applied to the removal of phosphorus and silicon in similar wastewater.
作者
杨磊
Yang Lei(Shenhua Zhungeer Energy and Resources Comprehensive Development Co.,Ltd.,Erdos 010300,China)
出处
《轻金属》
北大核心
2021年第2期20-25,共6页
Light Metals
基金
国家科技部“十二五”科技支撑计划项目(2011BAA04B05)
关键词
酸浸液
二氯氧化锆
磷
硅
动力学模拟
acid leaching solution
zirconium oxychloride
phosphorus
silicon
kinetic simulation
作者简介
杨磊(1983-),男,博士,高级工程师,主要从事粉煤灰酸法提取氧化铝工艺废水处理研究。
