利用酸性含铝废液制备工业硫酸铝  

Preparation of industrial aluminum sulfate from acidic wastewater containing aluminum

作　　者：赵卓英[1] 陈济美 杜冬云[1] 

机构地区：[1]中南民族大学环境科学与工程研究所催化材料科学国家民委教育部共建重点实验室,湖北武汉430074 [2]湖北省地质实验研究所

出　　处：《无机盐工业》2014年第8期62-65,共4页Inorganic Chemicals Industry

基　　金：武汉市重点科技攻关资助项目(201160638173)

摘　　要：采用活性白土工艺废酸液补加硫酸和铝矾土的方法制备工业硫酸铝,既消除活性白土工艺废酸液排放造成的污染问题,又回收了废酸液中的硫酸和硫酸铝。通过实验得到最佳工艺条件:pH=3.0、铝矾土量为每100 mL废酸液加入15 g、浓硫酸用量为10%(质量分数)。研究了结晶法与硫化钡法除铁,可分别得到硫酸铝产品,一等品中Al2O3和Fe3+的质量分数分别为16.5%(±0.06%)和0.095%(±0.18%),合格品中Al2O3和Fe3+的质量分数分别为16%和0.308%,符合标准HG/T 2225—2010中工业硫酸铝Ⅱ类产品质量指标要求。Industrial aluminium sulfate was prepared via reaction of acidic waste water from activated clay process with added H2SO4 and bauxite.It not only eliminated pollution caused by acidic waste water discharged from activated clay process,but also recycled aluminium sulfate and sulfuric acid in acidic waste water.The optimum conditions were obtained：pH =3.0,content of bauxite was 15 g per 100 mL acidic waste water,and proportion of concentrated sulfuric acid was 10%（mass fraction）.Barium sulfide and crystallization methods could be both adopted to remove irons. Thus,two kinds of aluminum sulfate products can be obtained.The Al2O3 and Fe3＋mass fractions in grade A aluminum sulfate were 16.5%（±0.06%） and 0.095%（±0.18%）.The Al2O3 and Fe3＋mass fractions in grade B aluminum sulfate were 16% and 0.308%.The results were in accord with class Ⅱ product quality indicators stipulated in Industrial Aluminium Sulfate Standard（HG/T 2225—2010）.

关 键 词：活性白土 废酸液 工业硫酸铝 

分 类 号：TQ133.1[化学工程—无机化工]