废纸再生新闻纸生产过程中胶黏物的表征和控制
详细信息    本馆镜像全文|  推荐本文 |  |   获取CNKI官网全文
摘要
本文通过对华泰集团新闻纸PM12车间生产线不同操作单元取样进行分析,确定了生产线中不同部位胶黏物的含量和化学成份组成。探讨了主要设备单元对黏性物质的去除效果。研究了废纸贮存条件对黏性物质的影响和用生物酶、阳粒子滑石粉对胶黏物的控制,并进行了生物酶控制胶黏物的生产试验。
     采用胶黏物筛分仪对不同操作单元大胶黏物的含量测试表明,90%以上的大胶黏物都可在脱墨浮选和筛选过程中去除。对生产线的不同操作单元浆料取样,对浆料纤维组分、细小组分和DCS的黏性物质进行抽出物检测和分析,发现浆料中74%的大胶黏物在制浆过程中被除去,其中黏合剂类物质约占黏性物质总量的85%至96%;35%的微细胶黏物在制浆过程中被除去,其中黏合剂类物质占黏性物质总量的81%至94%;浆料中DCS 57%左右的黏性物质在制浆过程中被除去,其中黏合剂类物质约占黏性物质总量的62%至77%。对烘缸沉积的胶黏物进行分离和分析表明,乙醇抽出物、氯仿抽出物、灰分所占原始胶黏物质量的比例分别为34.3%、4.03%、13.7%。主要成分为聚醋酸乙烯类和苯乙烯丙烯酸酯共聚物类物质。抽提残余物在煅烧后灰分分析主要含有C、O、Al、Si等元素。
     研究表明废纸的贮存温度对油墨去除率和脱墨浆白度有显著地影响。在20℃贮存条件下大胶黏物的含量最多,而胶体物质的含量最低;而阳离子滑石粉对胶黏物有显著的控制作用,且可提高纸页的灰分,但也导致了纸页物理强度的降低;用生物酶处理涂布损纸中的白色树脂,确定了淀粉酶处理涂布损纸的最佳条件,淀粉酶用量和温度是影响涂布损纸Zeta电位最显著的因素,而淀粉酶处理能降低浆料系统的阳离子需求量,减少系统中阴离子垃圾的含量。
     用巴克曼公司生物酶Optimyze? 525在车间进行了胶黏物控制的生产性试验,确定了生物酶Optimyze? 525的最佳添加点和添加量。试验表明生物酶能控制胶黏物,减少纸幅断头现象的发生。
Pulps and water samples sampled from the major operation units of a newsprint machine, PM 12 at Huatai Group were investigated. Compositions of sticky contaminants and their contents were examined. Based on the analyses, the efficiencies of the major operation units for removal of stickies were discussed. Storage temperature on deinking performances and effects on stickies behaviors were studied. Effectiveness of an enzyme and a cationic talc were examined for control stickies, and mill trial with enzyme was carried out in the production line.
     Macrositckies in pulp samples taken from the major operation units were examined by a PulMac Master Screen combined with a image analysis software. It showed that about 90% macrositckies were removed by screening and floatation processes.
     Sticky contaminants in fiber and fines fractions and water phases were examined. The results showed that about 74% macrositckies in fiber fractions were removed in the repulping processes, and adhesive substances accounted for about 85% to 96% in macrositckies. About 35% microstickies were removed during the repulping processes, and adhesive substances accounted for about 81% to 94% in microstickies. About 57% dissolved and colloid substances in pulp suspensions were removed in the repulping processes, and adhesive substances were about 62% to 77% among the total sticky substances. Sticky deposits sampled from dryers were analyzed, and the results showed that ethanol extractives, chloroform extractives and ash content were respectively accounted for 34.3%, 4.03%, 13.7% in the deposits. Polyvinyl acetate and styrene acrylate copolymers remained major components in the deposits. C, O, Al and Si were major elements determined in ashes of sticky deposits.
     Storage temperature affected significantly on behaviors of ink removal and pulp brightness. For the old newsprint stored at 20℃, deinked pulp was showed with the highest content of Macrostickies, and the lowest content of colloidal substances.
     It showed that the cationic talc can effectively reduce the amount of stickies and DCS, and decrease the cationic demand of the pulp as well as the turbidity of the filtrate. Addition of cationic talc increased significantly the ash content of the paper, meanwhile, influenced negatively the paper strength properties.
     Enzyme was applied to the coated paper broke for removal of white pitch and optimum conditions were acquired. The dosage and temperature were the major factors to affect the effectiveness of amylase, and resulted in decrease the cationic demand and anionic trashes in the system.
     Enzyme from Buckman was applied to the PM 12 for control of stickies problems. Suitable dosages and adding points of the enzyme were determined, and the results showed the effectiveness for cleaning the paper machine system and decreasing web breaks due to control of stickies.
引文
[1]国家发展和改革委员会.造纸产业发展政策[J].中华纸业, 2007, 28(11): 7-11.
    [2] Johansson, H., Wikman, B., Lindstrom, E., et al. Detection and Evaluation of Microstickies [J], Progress in Paper Recycling, 2003, 12(2): 4-12.
    [3]中国造纸协会,中国造纸工业2008年度报告[J],中华纸业, 2009, 30(9): 11-12.
    [4]邝仕均. 2006年世界造纸工业概况[J].造纸信息, 2007, (11): 25-28.
    [5] Julien Saint Amand, F., Le Ny, C.:“DIP fractionation and fiber upgrading”, INGEDE project 81 01 CTP, 12th INGEDE Symposium, proceedings, 30 January, 2003.
    [6]邝仕均. 2008年世界造纸工业概况[J].国际造纸, 2009, (11): 13-15.
    [7]王秀英.废纸回收利用技术的现状与未来发展方向探讨[J].林业科技情报,2006, (3):l10-111.
    [8]张素风,池东明.回收废纸及其在箱纸板生产中的应用[J].西南造纸,2005. (3):36-37.
    [9] Ackermann Christiane , Putz Hans - Joachim; Gottsching Lothar. Improved sticky determinati on method as a useful tool for the evaluation of the sticky forming potential of printed products . Research Forum on Recycling , Proceedings, 2001, 101-106.
    [10] Leroux R, Pruszynski P. E., Armstrong J.R, et al., Control of stickies contaminants in newsprint application - review mechanisms and novel approach. Pulp and Paper Can. 1997, 98(9): 54-60.
    [11] Cynthia R O and Marybrth K L.Increasing the Use of Secondary Fibers: An Overview of Deinking Chemistry and Stikies Control. Appita 1992,45(2):125-130
    [12] Guo X. Y. and Douek. Analysis of Deposits/Stickies from Newsprint Mills Using Recycled Fiber. Journal of Pulp and Paper.1996,22(11):J431-J439
    [13] Dyer J. Summary of stickies quantification methods [J]. Progress Paper Recyle, 1997, 6(4): 44-51.
    [14] Scott W. A survey of the various contaminants present in recycled waste paper white water systems[J].Tappi press, 1994, 310-312.
    [15]冯文英.胶黏物的各种分类方法[J].国际造纸, 2001, 20(4): 46-48.
    [16]欧建志,陈玉蕉,文飚等.新闻纸白水系统的DCS物质及其积累规律初探[J].造纸科学与技术, 2001, 20(5): 18-21.
    [17]陈嘉祥.脱墨过程中产生的溶解物和胶体物分析[J].中国造纸,2003, 22(1): 41-45.
    [18] Doshi, M.R. and Dyer, J.M. Various approaches to stickies classification. Prog. Pap. Recycling. 2000, 9(3): 51-55
    [19] Nelson N. C. Hsu. Stickies- The importance of their chemical and physical properties[J]. Paper recycling challenge. 1997, Volume 1: 256-258.
    [20] Martin H,Orlando J, Rojas R.Control of tacky deposits on paper machines—A review. Nordic Pulp and Paper Research Journal, 2006, 21(2):154-171.
    [21] Journal of Pulp and Paper Science, 2002, 28 (9):298-304. Dunham, Tubergen, Govoni, et al. Effects of dissolved and colloidal substances on flocculation of mechanical pulps [J]. Journal of Pulp and PaperScience, 2000, 26 (3):95-101
    [22] Francis D, Ouchi M. Effect of dissolved and colloidal solids on newsprint properties[J]. Journal of Pulp and Paper Science, 2001, 27(9):289- 295.
    [23] Zhang X,Beatson R,Cai Y,et al.Accumulation of specific dissolved and colloidal substances during white water recycling affects paper properties[J]. Journal of Pulp and Paper Science, 1999, 25(6):206-214.
    [24] Desharnais L,Danesult C, Montplaisir D,et al. Thermomechanical pulp washing effect on retention and drainage[J]. Pulp and Paper Canada, 2002, 103(4):44-48.
    [25] TAPPI (1999) T 277 pm-99: Macro stickies content in pulp: the‘pick-up’method.
    [26] INGEDE Method 4: Analysis of Macro Stickies in Deinked Pulp (DIP). [Cited March 2, 2007]. Available at: http://www.ingede.de/ingindxe/methods/meth04pe.pdf. 5 p
    [27] ISO 15360-1:2000 Recycled pulps– Estimation of Stickies and Plastics. Part 1: Visual method. International Organization for Standardization.
    [28] ISO 15360-2:2001 Recycled pulps– Estimation of Stickies and Plastics. Part 2: Image analysis method. International Organization for Standardization.
    [29] McHugh J, Hodgson K & Heindel TJ (2001) Quantification of stickie removal from OCC by dispersed air flotation. Proc. TAPPI 2001 Pulping Conference, Seattle, WA, USA, November 4-7, 2001, 997-1009.
    [30] ohansson H, Wikman B, Lindstr?m E & ?sterberg F (2003) Detection and Evaluation of Micro-Stickies. Prog Pap Recycling 12(2): 4-12.
    [31] Delagoutte T & Laurent A (2002) Modified method for the quantification of primary stickies in recycled pulps. Proc. 10th PTS-CTP Deinking Symposium, Munich, April 23-26, 2002, Paper 27.
    [32] Schabel S (2006) Macro Sticky Particle Measurement– Using Statistics to Specify and Improve Accuracy. Part II: Approximate Functions. Prog Pap Recycling 15(4): 11-12.
    [33] Johansson H, Wikman B, Lindstr?m E & ?sterberg F (2003) Detection and Evaluation of Micro-Stickies. Prog Pap Recycling 12(2): 4-12.
    [34] Huo X, Venditti RA & Chang H (2001) Use of Deposition and Extraction Techniques to Track Adhesive Contaminants (Stickies) in a Papermill. Prog Pap Recycling 10(2): 15-23.
    [35] De Jong R, Aziz S & Doshi M (2006) Determination of Macro and Microstickies in the Same Stock and Water Samples. Prog Pap Recycling 15(4): 22-30.
    [36] Hamann A, Gruber E, Sch?dler V, Champ S, Kuhn J & Esser A (2004) Effect of Fixation Agents on the Sticky Removal (in German). Wochenbl f Papierfabr 132(3-4): 102-106.
    [37] Künzel U & Prinz M (2006) Fixatives for Controlling of Detrimental Substances in the Production of Mechanical Printing Papers (in German). Wochenbl f Papierfabr 132(22): 1324-1328.
    [38] Yu L, Allen LH & Esser A (2003) Evaluation of Polymer Efficiency in Pitch Control with a Laser-Optical Resin Particle Counter. J Pulp Pap Sci 29(8): 260-266.
    [39] Huo X (2002) Adhesive contaminants (stickies): characterization and their interaction with papermaking components during paper recycling. Doctoral thesis, North Carolina State University, Department of wood and paper science, 163 p.
    [40] V?h?salo L (2005) White Pitch Deposition. Mechanisms and Measuring Techniques. Doctoral thesis, Laboratory of Wood and Paper Chemistry, Faculty of Chemical Engineering, ?bo Akademi University, Turku 2005. 42 p.
    [41] Haynes RD (2003) Measurement of Micro Stickies Formation. Prog Pap Recycling 12(2): 19-26.
    [42] Berger R (2002) Turbidity and charge complements for wet end information. Scientific and Technical Advances in Wet End Chemistry, Vienna, Austria, May 22-23, 2002. Pira International. Paper 4.
    [43] Doshi M, Dyer J, Aziz S, Jackson K & Abubakr S (1997) Quantification of Micro Stickies. Prog Pap Recycling 7(1): 80-83.
    [44] SitholéBB, Filion D & Allen LH (1997) A Laboratory test to predict deposition in recycled paper making. Proc. TAPPI Recycling Symposium, Chicago, USA, April 14-16, 1997, 367-372.
    [45] Welkener U, Hassler T & McDermott M (1993) The effect of furnish components on depositability of pitch and stickies. Nord Pulp Pap Res J 8(1): 223-225, 232.
    [46] Kanto ?qvist L, Salkinoja-Salonen M & Pelzer R (2005) Novel evaluation Methods for Paper Machine Deposits. Professional papermaking 2005(1): 36-42.
    [47] CarréB, Brun J & Galland G (1998) The incidence of the destabilitzation of the pulp suspension on the deposition of secondary stickies, Pulp Paper Can 99(7): 75-79.
    [48] Gruber E, Gattermayer J & P?tzold R (2000) Adsorption of Micro-disperse Polymers with Adhesive Potential (Micro-stickies). Ipw / Das Papier 2000(5): T74-T80.
    [49] Putz H-J & Hamann A (2003) Comparison of Sticky Test Methods (in German). Wochenbf Papierfabr 131(5): 218-225.
    [50] Putz H-J, Hamann A & Gruber E (2003) Examinations of Sticky Origin and StickyRemoval (in German). Wochenbl f Papierfabr 131(14-15), 2003, 883-891.
    [51] INGEDE Method 6: Precipitation of Anionic Substances. [Cited March 2, 2007]. Available at: http://www.ingede.de/ingindxe/methods/meth04pe.pdf. 2 p.
    [52] Kanto ?qvist L, Salkinoja-Salonen M & Pelzer R (2005) Novel evaluation Methods for Paper Machine Deposits. Professional papermaking 2005(1): 36-42.
    [53] Fike GM, Merchant T & Banerjee S (2006) Simulation of the behavior of stickie-contaminated sheets in a dryer section. TAPPI J 5(6):28-32.
    [54] INGEDE Method 9: Testing of adhesives for their deposition propensity in PM dryer section. [Cited March 2, 2007]. Available at: http://www.ingede.de/ingindxe/methods/meth09pe.pdf. 2 p.
    [55] Delagoutte T, Brun J & Galland G (2001) Drying section deposits: Identification of their origin. Investigácion y Técnica del Papel 40(149): 153-158.
    [56] Putz H-J & Hamann A (2003) Comparison of Sticky Test Methods (in German). Wochenbf Papierfabr131(5): 218-225.
    [57] Philippaerts J (2000) A New Method for Measuring Pitch and Stickies Deposition Potential and Treatment Efficacy. Paper technol 41(3): 51-56.
    [58] Lee HL & Kim JM (2006) Quantification of macro and micro stickies and their control by flotation in OCC recycling process. Appita J 59(1): 31-36.
    [59] Allen L & Ouellet S (2006) Deposit control: a team effort leading to improvements in a TMP/DIP newsprint mill. Proc. PAPTAC 92nd Annual Meeting, Montreal, Canada, February 7-9, 2006, A279-A290.
    [60] Cao B & Heise O (2001) Analyzing contaminants in OCC: Wax or not wax? Proc. 6th Research Forum on Recycling. Magog, Québec, Canada, October 1-4, 2001, 93-99.
    [61] Delagoutte T, Mc Lennan I & Bloembergen S (2001) Fluorescent labeling of PSA’s: A new approach to evaluate the behavior of adhesives during the recycling process. Proc. 6th Research Forum on Recycling, Magog, Canada, October 1-4, 2001, 111-117.
    [62] Guo K-Y & Douek M (1995) A new scheme to analyze deposits/stickies from mills using recycled fibre. Proc. 3rd Research Forum on Recycling, Vancouver, BC, Canada, November 20-22, 1995, 91-101.
    [63] Ward J, Hensel D & Patterson J (1994) A new approach to the control of stickies. Proc. 1994 Recycling Symposium, Boston, USA, May 15-18, 1994. 67-77.
    [64] Yordan JL & Maat P (1997) Application of new analytical tools to determine efficiency of talc as a pitch/stickies control agent. Proc. 1997 Recycling Symposium, Chicago, USA, April 14-16, 1997, 361-366.
    [65] Kanto ?qvist L, Salkinoja-Salonen M & Pelzer R (2005) Novel evaluation Methods for Paper Machine Deposits. Professional papermaking 2005(1): 36-42.
    [66] Lenes M, Andersen I & Stenbacka U (2001) Deposition of secondary stickies in DIP and TMP suspensions. Proc. 11th ISWPC International Symposium on Wood and Pulping Chemistry, Nice, France, June 11-14, 2001, 111-114.
    [67] dermatt J, Meier D & Mauler D (1998) Detection and Quantification of Additives in Papers by Analytical Pyrolysis-GC/MS on the Example of PAAE (in German). Das Papier 52(10): 598-602.
    [68] Odermatt J, Runge T, Meier D & Mauler D (1999) Analysis of Paper Additives by Pyrolysis Gas Chromatography / Mass Spectrometry (Py-GC/MS) (in German). Das Papier 53(10): V25-V28.
    [69] Odermatt J, Ringena O, Teucke R & Gerst M (2005a) Z-profile of styrene acrylate and urea formaldehyde resin in foils, measured by Py-GC/MS (analytical pyrolysis– gas chromatography/mass spectrometry). Nord Pulp Pap Res J 20(3): 277-282.
    [70] Odermatt J, Ringena O, Teucke R & Schmidt-Thümmes J (2005b) A new method for z-profile measurement of paper additives. Proc. 59th Appita Annual Conference, Auckland, New Zealand, May 16-19, 2005, 331-334.
    [71] Castro C, Dorris GM, Brouillette F & Daneault C (2001) Thermogravimetric determinationof synthetic polymers in recycled pulp systems and deposits. Proc. 6th Research Forum on Recycling. Magog, Québec, Canada, October 1-4, 2001. 85-91.
    [72] Sj?str?m J, Holmbom B & Wiklund L (1987) Chemical characteristics of paper machine deposits from impurities in deinked pulp. Nord Pulp Pap Res J 2(4): 123-131.
    [73] Holmbom B (1997) Analysis of dissolved and colloidal substances generated in deinking. Proc. Wet end chemistry conference and COST workshop, Gatwick, UK, May 28-29 1997, Paper 10.
    [74]王双飞,骆莲新.废纸回用过程中胶黏物障碍与控制[M].北京:中国轻工业出版社, 2009: 80-140.
    [75]王旭,詹怀宇,陈港.废纸回用中胶黏物的工艺控制技术[J].中国造纸学报, 2002, 17(11), 113-118.
    [76] Ling T.F.,Sutman F.J.,Richmann S.K.et al.Effect of Pulping Conditions on Stickies Behavior in Office Waste Deinking System.Tappi J.1994,77(7): 143-151.
    [77] Hanu W M.“Dispersants,”in kirk-othmer encyclopidia of chemical technol[J].Wiley-inter science,1993,8(4):293—3l1.
    [78]张菊先,吕建明.用酯类酶控制废纸浆中的胶黏物[J].国际造纸, 2003, 22(4): 10
    [79] David R., J., James W. F.. Esterase-type enzymes offer recycled mills an alternative approach to stickies control[J].Pulp and paper, 2003, 104(2): 28-31.
    [80]巨云利,刘书良,王庆梅,田居龙.胶黏物在再生新闻纸生产中的控制[J].中华纸业, 2007,(01):41-44
    [81]刘秉钺,韩颖.再生纤维与废纸脱墨技术[M].北京:化学工业出版社, 2005. 66-139.
    [82]陈庆蔚.当代废纸制浆技术[M].北京:中国轻工业出版社, 2005. 33-213.
    [83]李宗全,詹怀宇等.新闻纸厂胶黏物组分的分离与分析[J].中国造纸学报, 2005, 20(2): 109-113.
    [84]苗庆显,秦梦华,废纸回用过程中溶解物与胶体物的研究现状[J].纸和造纸, 2006, 25(1): 67-71.
    [85]杨淑惠.植物纤维化学[M].北京:中国轻工业出版社, 2001.
    [86] D F Zinkel.Tall oil precursors—an integrated analytical scheme for pine extractives[J].Tappi Journal,1975,58(1):109-112.
    [87] Leroux, R., Pruszynski, P., Armstrong, J.R., et al., Control of Stickies Contaminants in Newsprint Applications– Review, Mechanisums and Novel Approach, 1997, 98(9): 54-61.
    [88] Amand, F.J., Perrin, B., Kolakowski, P., Stickies Screening: Influence of Consistency and Other Screen Operating and Technological Parameters [J]. ATIP Association Technique de L'Industrie Papetiere, 2007, 61(3): 10-29.
    [89]李金宝,张美云,修慧娟.废纸胶黏物的分类及去除方法[J].纸和造纸, 2004, (6): 28-30.
    [90]吴敏仪,陈坤亭.废纸的贮存对脱墨效果的影响[J].造纸科学与技术, 1993, 22(6): 30.
    [91]傅英娟,秦梦华等.报纸贮存状况对油墨可脱除性的影响[J].中国造纸, 2006, 25(1): 2.
    [92] DORRIS G., CASTRO C. and PAGE N., Ink Aging and Deinkability: An Overview, Miscell. Report MR444. Paprican, QC. Canada, 2001.
    [93] JINNOUCHI S., KOSHITSUKA T. and KIMURA A., Effect of Aging Period on Deinking Properties of Recent ONP [J]. Japan Tappi J., 1993, 46(11): 20.
    [94]陈嘉翔.旧报纸和旧杂志纸油墨的老化对可脱墨性的影响[J].中华纸业, 2001, 22(1): 26.
    [95]马林,何桢.六西格玛管理[M].北京:中国人民大学出版社, 2004.
    [96] PACKHAM D.E., Ethylene-Vinyl Acetate Copolymers, In: Packham D.E. (ed). Handbook of Adhesion [M]. Bath, UK, John Wiley & Sons, Ltd., 2005, 156-161.
    [97] TOD D.A., Glass Transition Temperature, In: Packham D.E. (ed). Handbook of Adhesion [M]. Bath, UK, John Wiley & Sons, Ltd., 2005, 156-161.
    [98] Charnay, C., Lagerge, S., Partyka, S. Assessment of the Surface Heterogeneity of Talc Materials [J], Journal of Colloid and Interface Science, 2001, 233(2): 250-258.
    [99] Morris, G. E., Fornasiero, D., Ralston, J. Polymer Depressants at the Talc-Water Interface: Adsorption Isotherm, Microflotation and Electrokinetic Studies [J], Int. J. Miner. 2002, Process, 67(1-4): 211-227.
    [100] Perrin B., Julien S.A. Deinking rejects analysis in newsprint and copy paper mills[A]. Proc. 12th PTS-CTP Deinking Symposium[C]. Leipzig, Germany, 2006: 31
    [101] Biza P. Talc - A Modern Solution for Pitch and Stickies Control [J]. Paper Technology, 2001, 42(3): 22-24.
    [102] Jorge L. Yordan,. Talc for Contaminant Control in Recycled Fiber [J]. Paper Recycling Challenge, 1997, Vol.1: 76-80.
    [103] Reynolds, J., Yordan J.L., Laboratory and Mill Experiences with A Novel Talc for Deposit Control of Pulps Rich in Anionic Trash [C], Preprints of 88th PAPTAC Annual Conference, Book-B: 53-56, Montreal, QC. Canada. Jan 30, 2002.
    [104] Hayakawa, S., Williams, G.R., A Cost-Effective Talc Solution to Stickles Control in OCC Pulps [J], Japan Tappi Journal, 2004, 58(9): 58-61.
    [105]吴嘉晟.制造业六西格玛应用手册[M].北京:中国人民大学出版社, 2004.
    [106] Martin H,Orlando J, Rojas R.Control of tacky deposits on paper machines—A review. Nordic Pulp and Paper Research Journal, 2006, 21(2):154-171.
    [107]王秀英,废纸回收利用技术的现状与未来发展方向探讨[J].林业科技情报,2006, (3):l10-111.
    [108]王旭,詹怀宇,陈港.废纸回用中黏胶物的化学组成和沉积机理[J].中国造纸, 2002(1): 45-48.
    [109] Schabel S (2006) Macro Sticky Particle Measurement– Using Statistics to Specify and Improve Accuracy. Part II: Approximate Functions. Prog Pap Recycling 15(4): 11-12.
    [110] Kanto ?qvist L, Salkinoja-Salonen M & Pelzer R .Novel evaluation Methods for Paper Machine Deposits. Professional papermaking 2005(1): 36-42.
    [111]王进,赵传山,陈夫山.胶体滴定和Zeta电位在造纸中的应用[J].西南造纸, 2002(1): 8-9 .

© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号

地址:北京市海淀区学院路29号 邮编:100083

电话:办公室:(+86 10)66554848;文献借阅、咨询服务、科技查新:66554700