工程科学学报
工程科學學報
공정과학학보
Journal of University of Science and Technology Beijing
2015年
5期
33-39
,共7页
高金星%光华%唐萍%陈力源%杨昌霖
高金星%光華%唐萍%陳力源%楊昌霖
고금성%광화%당평%진력원%양창림
连铸%保护渣%氧化铝%氟离子%离子交换
連鑄%保護渣%氧化鋁%氟離子%離子交換
련주%보호사%양화려%불리자%리자교환
continuous casting%mold fluxes%alumina%fluorine ions%ion exchange
为了消除保护渣在使用过程中氟溶解到水中造成的危害,提出了开发高Al2 O3含量的保护渣.研究了不同含量的Al2 O3对保护渣熔渣水浸液中F-质量浓度和pH值的影响,并利用X射线光电子能谱分析了Al2 O3含量对保护渣熔渣结构的影响.当Al2 O3的质量分数为4%时,保护渣迁移到水中的F-质量浓度为22.8~35.4 mg·L-1,pH值的变化范围为4.0~9.5;当Al2 O3的质量分数由4%增加到34%,F-质量浓度和pH值的变化范围均是先急剧减小后略有增加的趋势. X射线光电子能谱分析显示:增加保护渣中Al2 O3的含量时,保护渣中Al2 O3通过形成Al—F共价键,抑制了氟的浸出.控制保护渣中Al2 O3的质量分数在16%~34%的范围,则实验水样中F-质量浓度在4.0~10.0 mg·L-1的范围,pH值在6.5~7.5的近中性范围,可减弱氟浸出造成的危害.
為瞭消除保護渣在使用過程中氟溶解到水中造成的危害,提齣瞭開髮高Al2 O3含量的保護渣.研究瞭不同含量的Al2 O3對保護渣鎔渣水浸液中F-質量濃度和pH值的影響,併利用X射線光電子能譜分析瞭Al2 O3含量對保護渣鎔渣結構的影響.噹Al2 O3的質量分數為4%時,保護渣遷移到水中的F-質量濃度為22.8~35.4 mg·L-1,pH值的變化範圍為4.0~9.5;噹Al2 O3的質量分數由4%增加到34%,F-質量濃度和pH值的變化範圍均是先急劇減小後略有增加的趨勢. X射線光電子能譜分析顯示:增加保護渣中Al2 O3的含量時,保護渣中Al2 O3通過形成Al—F共價鍵,抑製瞭氟的浸齣.控製保護渣中Al2 O3的質量分數在16%~34%的範圍,則實驗水樣中F-質量濃度在4.0~10.0 mg·L-1的範圍,pH值在6.5~7.5的近中性範圍,可減弱氟浸齣造成的危害.
위료소제보호사재사용과정중불용해도수중조성적위해,제출료개발고Al2 O3함량적보호사.연구료불동함량적Al2 O3대보호사용사수침액중F-질량농도화pH치적영향,병이용X사선광전자능보분석료Al2 O3함량대보호사용사결구적영향.당Al2 O3적질량분수위4%시,보호사천이도수중적F-질량농도위22.8~35.4 mg·L-1,pH치적변화범위위4.0~9.5;당Al2 O3적질량분수유4%증가도34%,F-질량농도화pH치적변화범위균시선급극감소후략유증가적추세. X사선광전자능보분석현시:증가보호사중Al2 O3적함량시,보호사중Al2 O3통과형성Al—F공개건,억제료불적침출.공제보호사중Al2 O3적질량분수재16%~34%적범위,칙실험수양중F-질량농도재4.0~10.0 mg·L-1적범위,pH치재6.5~7.5적근중성범위,가감약불침출조성적위해.
In order to eliminate the hazard effects of the leaching of fluorine in mold fluxes, this paper introduces a mold flux with high Al2 O3 content. The effects of Al2 O3 content on the concentration of F- ions and the pH value of leaching water were investigated, and the dependence of Al2 O3 on the structure of mold fluxes was analyzed by X-ray photoelectron spectroscopy ( XPS) . When the mass fraction of Al2 O3 is 4%, the concentration of F- ions in leaching water is about 22. 8 to 35. 4 mg·L-1 , and the pH range is between 4. 0 and 9. 5. The F- concentration and the pH range initially reduces and then slightly rises again as the Al2 O3 content increases from 4% to 34%. The XPS spectra show that the Al-F bond forms in the mold flux when the Al2 O3 content increases. This can restrain the dissolution of fluorine in water. Controlling the content of Al2 O3 between 16% and 34%, the F- concentration in leaching water is about 4. 0 to 10. 0 mg·L-1 , and the pH range is between 6. 5 and 7. 5. This is helpful to reduce the hazard effects of the leaching of fluorine in mold fluxes.