采用水溶液聚合方法,以过硫酸钾为引发剂,以腐植酸钾、丙烯酰胺为原料进行接枝共聚反应。考察了引发剂用量、单体配比、反应温度和反应时间等因素对水煤浆表观粘度的影响。确定了最佳聚合工艺条件为反应温度75℃、反应时间2.5h、引发剂用量5%、丙烯酰胺与腐殖酸质量比为0.8∶1。当分散剂用量为水煤浆总质量的3%时,水煤浆的表观粘度为790mPa.s。通过对水煤浆的粘度、稳定性研究,以及水煤浆的表观粘度的测定,得知该分散剂具有腐植酸系分散剂的特点,即分散性能佳,又改变了腐植酸系分散剂容易沉淀、成浆性能差的特点。
By using agueous solution polymerization method,using potassium persulfate as initiator,with potassium humic acid,acrylamide as raw material was prepared by graft copolymerization.Study of the amount of initiator,monomer ratio,reaction temperature,and reaction time on the apparent viscosity effect.To determine the best process conditions of polymerization:reaction temperature 75℃,reaction time 2.5h,dosage of initiator,acrylamide and 5%humic acid mass ratio 0.8∶1.When the amount of dispersing agent for coal water slurry 3% of the total weight,coal-water slurry apparent viscosity of 790mPa.s.The viscosity of CWS,stability studies,and determination of the apparent viscosity of CWS,learned that the CWS dispersants has the characteristics of humic acid department of dispersant,that is good dispersion properties,and improve humic acid department of dispersant the characteristics of easy to form precipitates and formation of CWS poor performance.
参考文献
| [1] | Song Jingmei;Zhu Shuquan;Wu Xiaohua et al.Coal wa-ter slurry and dispersant application status[J].Coal Pro-cessing and Comprehensive Utilization,2008,3(04):45-46. |
| [2] | Zhang Jiali;Zhang Ruyi;Shen Lunjian .Humic acid dis persant of coal water slurry chemical modification re-search[J].Henan Chemical Industry,2005,22(09):18-19. |
| [3] | Zhang Chunxiao;Bai Fuchen;Pan Zhenyuan et al.Three yuan of synthesis and absorption properties of acrylic acid,methyl acrylic P(AA MA AM)[J].Functional Materials,2001,42(05):282-283. |
| [4] | 张守玉,王洋,朱廷钰,吕俊复,岳光溪.活化条件对彬县煤活性焦孔隙结构的影响[J].化学反应工程与工艺,2003(03):221-226. |
| [5] | Song Haiyan;Yin Youyi;Song Jianzhong et al.The chemical composition of humic acid from different sources and analysis of the structure of China[J].Journal of South China Normal University(Naturel Sclence Edition),2009,1(01):61-62. |
| [6] | Pan Xiangqing;Zeng Fan;Fu Xiaoyan .Humic acid disper-sant of coal water slurry properties and fractions of rela-tion research[J].Coal Conversion,1999,22(01):40-41. |
| [7] | Zhi Xianhua .Coal water slurry stability influencing fac tors and evaluation methods[J].Coal Processing and Comprehensive Utilization,2000,38(01):8-39. |
| [8] | Nam Sun Roh;Dae Hyun Shin;Dong Chan Kim et al.Rheological behaviour of coal-water mixtures:l,effects of coaltype,loading and particle size[J].Original Research Article,1995,74(08):1220-1225. |
| [9] | Zhang Rongzeng.Pulping technology of coal water slurry[M].北京:科学出版社,1996 |
| [10] | Liu Minghua.Additive for coal water slurry preparation and application[M].北京:化学工业出版社,2006 |
| [11] | Zhang Zhong;Hu Jihua.Colloid stability[M].广州:广东科技出版社,1992:87-89. |
| [12] | Dai Yuqing;He Qihui;Xie Li et al.Dispersant of coal water slurry action mechanism and application research[J].Fine Chemicals,1999,16:196-198. |
| [13] | Pan Zuren.Polymer chemisity[M].北京:化学工业出版社,2002 |
| [14] | S K Mishra;S B Kanungo .Factors Affecting the Preparation of Highly concentrated Coal-Water Slurry HCCWS)[J].Journal of Scientific & Industrial Research,2000(10):765-790. |
| [15] | Zhu Shuquan;Zhan Long .Study of slurryability of the Chinese coal[J].Journal of China Coal Society,1998,23(02):198-204. |
| [16] | Zhu Shuquan .Comprehensive review on the influence of coal characteristics on its slurryability[J].Coal Pro-cessing and Comprehensive Utilization,1996,2:5-8. |
| [17] | 孙成功,吴家珊,李保庆.代温热改质煤表面性质变化及其对浆体流变特性的影响[J].燃料化学学报,1996(02):174-180. |
| [18] | 孙成功,谢亚雄,李保庆,李永昕.分散剂分子结构特征译煤浆流变特性的影响[J].燃料化学学报,1997(03):213-217. |
| [19] | Taweel A M Fadaly;Kwak J C T.Effect of coal prop erties on the rheology and stability of CWS[A].New rleans,1985:15-23. |
| [20] | Seki M;Kiyama K;Nishino J.Effects of coal property and additive on the rheological characteristics of coal wa-ter mixture[A].New releans,1985:136-145. |
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