。1022。 北京科技大学学报 2006年第11期 ment friendly mold pow der.Shinagawa Tech Rep 2002.45: 3结论 85 (1)A厂使用低氟保护渣，二冷水中F一质量 [2 Hongye H.Hideaki S.Immolilization mechanism of fluorine in aqueous solution w ith calcium aluminates.ISIJ Int.2001. 浓度增幅为1.2~24.3mgL,水样呈中性排 41(5):506 污水中的FP质量浓度约为1.7-~82mgL1,符 【3到吴春华周小飞。唐文浩.大气氟化物对植物的伤害.热带 合排放标准：B厂使用高氟保护渣，二冷水中F 农业科学，2001(1)：69 质量浓度增幅为57.9mgL1,水样呈酸性，排污 【4王杰，陈奎珍，陆丹，等.氟化物对作业工人健康影响的动 水中F质量浓度为35mgL,超过排放标准. 态观察.职业医学，199421：43 【习曾如清，吴方正，周细红，等.氟化物对植物的衰老效应及 (2)保护渣中氟含量越高，保护渣在水中的 其机理探讨.农业环境保护，199615：231 浸泡时间越长，渣中氟向水中的转移量就越多. [6 Alexandes Zaiter I.Investigation of the mould pow der 控制保护渣中氟不超过2%，有利于减弱保护渣 volaties during continuous casting.Steel Res 1994 65(9): 氟的浸出对二冷水的危害. 368 (3)在研究的组成范围内，碱度Ca0/Si02和 [7 Morita A,Omoto T.UeaS et al Development of fuorine free mold pow der for small size molds.Shinagawa Tech Rep L0对渣中氟的浸出无明显影响.增加保护渣中 2001,44:21 的B203含量，有利于降低保护渣中氟在二冷水中 【8HVT91一2002地表水和污水监测技术规范.北京：中国标 的浸出. 准出版社，2002：7 【习李海生。环境影响评价技术导则与标准汇编.北京：中华环 参考文献 境科学出版社.2005：942 [1]Omoto T,Iwamoto Y,Yamaji H.Developmnent of environ- Influence of continuous casting mould powder fluxes on fluorine content in sec- ondary cooling water WANG Qian,WANG Ping,HE Shengping,XIE Dan',Z.S.Li2,K.C.Mills? 1)College of Materials Science and Engineering.Chongqing Uriverity,Chongqing 400044,China 2)Imperial Colege.London SW72AZ UK ABSTRACT Under the use of mould fluxes with different fluorine contents,the change of fluorine ion (F)concentration in the continuous casting secondary cooling water was investigated in two plants.An experiment was also conducted to understand how the components and the soaking time of fluxes influence the F concentration of leaching water.The results showed that,when a flux with low fluorine content was used in Plant A,the increase of F concentration in the secondary cooling water was 1.2 ~24.3 mg'L,and the water behaved in neutrality.While in Plant B a flux containing high fluorine was used. the increase of F concentration in the secondary cooling water reached at 57.9mgL and the water be- haved in acidity.The higher the fluorine content in the fluxes was and the longer the soak time of the fluxes in the water was,the more the fluorine w ould transfer into the water.Controlling the fluorine in the fluxes less than 2%in mass fraction was helpful to reduce the hazard effects of the mould fluxes on the secondary cooling water.In the researched composition ranges,the basicity (CaO/Si02)and the Li2O content had not an evident influence on the leaching of fluorine.Increasing the content of B203 could reduce the leaching of fluo rine from the mould fluxes into the secondary cooling water. KEY WORDS mould fluxes;ionized fluorine;water pollution;eco-technology (C)1994-2019 China Academic Journal Electronic Publishing House.All rights reserved.http://www.cnki.net3 结论 (1)A 厂使用低氟保护渣, 二冷水中 F -质量 浓度增幅为 1.2 ～ 24.3 mg·L -1 , 水样呈中性, 排 污水中的 F -质量浓度约为 1.7 ～ 8.2 mg·L -1 ,符 合排放标准 ;B 厂使用高氟保护渣 ,二冷水中 F - 质量浓度增幅为 57.9 mg·L -1 , 水样呈酸性, 排污 水中 F -质量浓度为 35 mg·L -1 ,超过排放标准. (2)保护渣中氟含量越高 ,保护渣在水中的 浸泡时间越长, 渣中氟向水中的转移量就越多. 控制保护渣中氟不超过 2 %, 有利于减弱保护渣 氟的浸出对二冷水的危害 . (3)在研究的组成范围内,碱度 CaO/SiO2 和 Li2O 对渣中氟的浸出无明显影响 .增加保护渣中 的B2O3 含量,有利于降低保护渣中氟在二冷水中 的浸出. 参 考 文 献 [ 1] Omoto T , Iwamot o Y , Yamaji H .Development of environ￾ment friendly mold pow der .Shinagawa Tech Rep, 2002 , 45: 85 [ 2] Hongye H , Hideaki S .Immobilization mechanism of fluorine in aqueous soluti on w ith calcium aluminat es.ISIJ Int , 2001 , 41(5):506 [ 3] 吴春华, 周小飞, 唐文浩.大气氟化物对植物的伤害.热带 农业科学, 2001(1):69 [ 4] 王杰, 陈奎珍, 陆丹, 等.氟化物对作业工人健康影响的动 态观察.职业医学, 1994 , 21:43 [ 5] 曾如清, 吴方正, 周细红, 等.氟化物对植物的衰老效应及 其机理探讨.农业环境保护, 1996 , 15:231 [ 6] Alexander, Zaiter I .Investigation of the mould pow der volatiles during continuous casting .Steel Res, 1994 , 65(9): 368 [ 7] Morita A , Omoto T , Uet a S , et al.Development of fluorine free mold pow der for small size molds.Shinagawa Tech Rep, 2001 , 44:21 [ 8] HJ/ T 91—2002 地表水和污水监测技术规范.北京:中国标 准出版社, 2002:7 [ 9] 李海生.环境影响评价技术导则与标准汇编.北京:中华环 境科学出版社, 2005:942 Influence of continuous casting mould powder fluxes on fluo rine content in sec￾ondary cooling water WANG Qian 1), WANG Ping 1), HE Shengping 1), XIE Dan 1), Z .S .Li 2), K .C .Mills 2) 1)College of Materials Science and Engineering , Chongqing Uni versit y , Chongqing 400044 , China 2)Imperial College , London SW72AZ, UK ABSTRACT Under the use of mould fluxes w ith different fluorine contents, the change of fluorine ion (F -)concentration in the continuous casting secondary cooling w ater w as investig ated in tw o plants .An experiment was also conducted to understand how the components and the soaking time of fluxes influence the F - concentration of leaching w ater.The results showed that , when a flux with low fluorine content w as used in Plant A , the increase of F - concentration in the secondary cooling w ater w as 1.2 ～ 24.3 mg·L -1 , and the w ater behaved in neutrality .While in Plant B , a flux containing high fluorine w as used , the increase of F - concentratio n in the secondary cooling water reached at 57.9mg·L -1 , and the w ater be￾haved in acidity .The hig her the fluorine content in the fluxes w as and the longer the soak time of the fluxes in the water w as, the mo re the fluorine w ould transfer into the w ater .Controlling the fluorine in the fluxes less than 2 %in mass fraction w as helpful to reduce the hazard effects of the mould fluxes on the secondary cooling w ater.In the researched composition ranges, the basicity (CaO/SiO2)and the Li2O content had not an evident influence on the leaching of fluorine.Increasing the content of B2O3 could reduce the leaching of fluo rine from the mould fluxes into the secondary cooling w ater. KEY WORDS mould fluxes ;ionized fluorine ;water pollution ;eco-technology · 1022 · 北 京 科 技 大 学 学 报 2006 年第 11 期