normal style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-INDENT: 26.25pt">用硫酸处理高岭土,需在压力为2×155Pa的压力锅中持续2—3h,采用8—10%H2SO4溶液且须过量,处理后洗去Fe和剩余酸,用这种方法可除去高岭土中约90%的Fe2O3。采用比例为1:2的浓硫酸和硫酸铵的混合液在
normal style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-ALIGN: center; mso-outline-level: 1" align=center>表3 用草酸及其盐类处理高岭土的试验结果
normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-outline-level: 1" align=center>矿样 | normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-outline-level: 1" align=center>Fe2O3含量(%) | normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-outline-level: 1" align=center>TiO2含量(%) | ||
normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-outline-level: 1" align=center>处理前 | normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-outline-level: 1" align=center>处理后 | normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-outline-level: 1" align=center>处理前 | normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-outline-level: 1" align=center>处理后 | |
normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-outline-level: 1" align=center>No.1 | normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-outline-level: 1" align=center>0.36 | normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-outline-level: 1" align=center>0.19 | normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-outline-level: 1" align=center>0.50 | normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-outline-level: 1" align=center>0.47 |
normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-outline-level: 1" align=center>No.2 | normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-outline-level: 1" align=center>1.22 | normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-outline-level: 1" align=center>0.49 | normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-outline-level: 1" align=center>0.72 | normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-outline-level: 1" align=center>0.51 |
normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-outline-level: 1" align=center>No.3 | normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-outline-level: 1" align=center>0.83 | normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-outline-level: 1" align=center>0.40 | normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-outline-level: 1" align=center>1.11 | normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-outline-level: 1" align=center>0.71 |
normal style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-INDENT: 26.25pt; mso-outline-level: 1">7、生物除铁
normal style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-INDENT: 26.25pt">不同种类的微生物(细菌、真菌等)具有从氧化铁(褐铁矿、针铁矿等)中溶解铁的能力,微生物的这种溶解作用与起复合剂作用的有机酸和其它新陈代谢物的形成有关,也与酶解和非酶解对铁的还原作用有关。利用微生物这种溶铁能力,可将高岭土中所含的铁杂质除去。目前已研制出一种两步处理方法:首先制备培养液(即浸出剂),浸出剂是将菌株在