。556 北京科技大学学报 第31卷 tion of ammonia ritrogen by modified natural zeolite.J South 染治理技术与设备，2006.7(3)：75) China Univ Technol,2007.35(4):6 [12 Wang L J.Lin C M.Research progress of nitrogen and phos (李忠，符瞰，夏启斌.改性天然沸石的制备及对氨氮的吸附 phorus removal from w ater by modified zeolite.J Anhui Agric 华南理工大学学报。2007.35(4)：6) Sci,2007,35(20):6207 [10 Kirik S D.Dubkov A A.Dubkova S A.et al.X-ray powder (王黎瑾。林春绵。改性沸石净化水中氮磷的研究进展。安徽 diffraction and t.p.d.study of SO2 adsorption on type Y zeolite. 农业科学，2007,35(20)：6207) Zeolites,1992.(12):292 13]Ding W M.Huang X.Zhang L P.Removal of phosphorus from [1I]Ren G.Cui F Y.Study of modified zeolite to remove ammonia aqueous soltion by lant hanum bydrate.Environ Sci.2003 24 nitrogen in water.Tech Equip En viron Pollut Control.2006 (5):110 7(3):75 (丁文明，黄霞，张力平.水合氧化镧吸附除磷的实验研究. (任刚，崔福义.改性天然沸石去除水中氨氮的研究.环境污 环境科学，2003.24(5)：110) (上接第536页) (向鹏程谢英亮.应用盈亏平衡分析法确定低品位矿利用的 [3]Chang W S Sun L M.Hao Q M.Application of the delimitation 临界品位.治金矿山设计与建设，2001,23(6)：24) method of dynamic cconomic mining boundary to the mining of I8 Chen S R.Calculating the cassdifferenceg rade of Hetai gold low grade one body of Fankou lead-zinc mine.Gold,2003. mine by reverse deduction method.South fron Steel 2000. 24(5):19 114(6):18 (畅文生，孙立明，郝全明.动态经济开采边界圈定方法在凡口 (陈少荣.用倒推方法计算河台金矿级差品位.南方钢铁 铅锌矿低品位矿体开采中的应用.黄金.2003,245方19) 2000114(6):18) [4]Xu T.Optimum intensification of reserves devdlopment.Nat Re- [9 Zhou LS.The Acoount and application of the g radation quality in sour Econ China.2004.7(12):4 gold one.Gold Sci Tech nol,1998.6(4):45 (徐森.矿量开发最佳集约化程度优选研究.中国国土资源经 (周龙寿.黄金矿山级差品位的计算与应用.黄金科学技术 济，20047(12)：4) 19986(4):45) [5]Osanloo M.Ataei M.Using equivalent grade factors to find the 10 Wu Z L.Fu Q.Wang L.Using differential grade index to carry optimum cut-off grades.Miner Eng,2003,16(2):771 out dynamic appraisal of mine production.Gold,2000 21(8): [6]Jiang S H.Li D B.Decision for mining and dressing of low-grade 28 ores by breakeven gmdes.Jiangxi Nonferrous Met.2006 (吴忠良，付强。王林.应用级差品位指标动态评价矿山生产 20(1):22 过程.黄金.2000.21(8)：28) (江四海李德斌.运用盈亏平衡品位进行低品位矿采选决策. [11]Zhang B R.Sun L N.An approach to the grade difference index 江西有色金属，200620(1)：22) of gold mines.JShenyang Ins Gold Technol,1995.14(2):125 【7刃Xiang PC,Xie Y L.Determining critical gra止of low grade ore (张宝仁，孙丽娜.岩金矿山级差品位指标的探讨.沈阳黄金学 utilization by break even analysis.Met Mine Des Constr,2001. 院学报.199514(2)：125) 23(6):24tion of ammonia nitrogen by modified natural zeolit e.J South China Uni v Technol , 2007 , 35(4):6 (李忠, 符瞰, 夏启斌.改性天然沸石的制备及对氨氮的吸附. 华南理工大学学报, 2007 , 35(4):6) [ 10] Kirik S D, Dubkov A A, Dubkova S A, et al.X-ray pow der diffraction and t.p.d.study of SO2 adsorption on type Y zeolit e. Zeolites, 1992 , (12):292 [ 11] Ren G , Cui F Y.Study of modified zeolit e t o remove ammonia nitrogen in w ater.Tech Equip En viron Pollut Control , 2006 , 7(3):75 (任刚, 崔福义.改性天然沸石去除水中氨氮的研究.环境污 染治理技术与设备, 2006 , 7(3):75) [ 12] Wang L J , Lin C M .Research progress of nitrogen and phos￾phorus removal from w ater by modified zeolite.J Anhu i Agric S ci , 2007 , 35(20):6207 (王黎瑾, 林春绵.改性沸石净化水中氮磷的研究进展.安徽 农业科学, 2007 , 35(20):6207) [ 13] Ding W M , Huang X, Zhang L P.Removal of phosphorus from aqueous solution by lanthanum hydrate.E nviron S ci , 2003 , 24 (5):110 (丁文明, 黄霞, 张力平.水合氧化镧吸附除磷的实验研究. 环境科学, 2003 , 24(5):110) (上接第 536 页) [ 3] Chang W S , S un L M , Hao Q M .Application of the delimit ation method of dynamic economi c mining boundary t o the mining of low grade ore body of Fankou lead-zinc mine.Gold , 2003 , 24(5):19 (畅文生, 孙立明, 郝全明.动态经济开采边界圈定方法在凡口 铅锌矿低品位矿体开采中的应用.黄金, 2003 , 24(5):19) [ 4] Xu T .Optimum intensification of reserves development .Nat Re￾sour Econ Ch ina , 2004 , 7(12):4 (徐焘.矿量开发最佳集约化程度优选研究.中国国土资源经 济, 2004 , 7(12):4) [ 5] Osanloo M , Ataei M .Using equivalent grade f act ors t o find the optimum cut-off g rades.Miner E ng , 2003 , 16(2):771 [ 6] Jiang S H , Li D B .Decision for mining and dressing of low-grade ores by breakeven grades.Jiangxi Non ferrous Met , 2006 , 20(1):22 (江四海, 李德斌.运用盈亏平衡品位进行低品位矿采选决策. 江西有色金属, 2006 , 20(1):22) [ 7] Xiang P C , Xie Y L .Determining criti cal grade of low grade ore utilization by b reak even analysis.Met Mine Des Constr, 2001 , 23(6):24 (向鹏程, 谢英亮.应用盈亏平衡分析法确定低品位矿利用的 临界品位.冶金矿山设计与建设, 2001 , 23(6):24) [ 8] Chen S R.Calculating the class-diff erence-g rade of Het ai gold mine by reverse deduction method.South Iron S teel, 2000 , 114(6):18 (陈少荣.用倒推方法计算河台金矿级差品位.南方钢铁, 2000 , 114(6):18) [ 9] Zhou L S .The Accoun t and application of the g radation quality in gold ore .Gold Sci Tech nol , 1998 , 6(4):45 (周龙寿.黄金矿山级差品位的计算与应用.黄金科学技术, 1998 , 6(4):45) [ 10] Wu Z L , Fu Q , Wang L .Using diff erential grade index t o carry out dynamic appraisal of mine production.Gold , 2000 , 21(8): 28 (吴忠良, 付强, 王林.应用级差品位指标动态评价矿山生产 过程.黄金, 2000 , 21(8):28) [ 11] Zhang B R, Sun L N .An approach t o the grade difference index of gold mines.J Shenyang Inst Gold Technol , 1995 , 14(2):125 (张宝仁, 孙丽娜.岩金矿山级差品位指标的探讨.沈阳黄金学 院学报, 1995 , 14(2):125) · 556 · 北 京 科 技 大 学 学 报 第 31 卷