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中文摘要：
针对煤粉中含有的高价金属离子会降低水煤浆的成浆性问题,采用了三聚磷酸钠作为金属离子调节剂与几种阴离子型分散剂复配后,进一步提高分散降黏性能.通过测定分散剂在煤粒表面的吸附量、Zeta电位及吸附层厚度,揭示了三聚磷酸钠对脂肪族分散剂（SAF）、木质素系分散剂（GCL3S）及萘系分散剂（FDN）的分散协同增效作用机理.结果表明,三聚磷酸钠与SAF复配同时增加了煤粒之间的静电排斥力和空间位阻,使分散剂在煤粒表面的Zeta电位和吸附层厚度均增大;与GCL3S复配主要增加了煤粒之间的静电排斥作用;对FDN是通过增加分散剂在煤粒之间的空间位阻效应,促进分散降黏性能的提高.
英文摘要：
Because of high valence metal ions contained in coal would reduce the perfor-mance of coal water slurry,sodium tripolyphosphate was selectd as a kind of adjustment agent to remix with different anionic dispersants to enhance the dispersing and viscosity-reducing ability.Through the experiment of adsorption mensuration,Zeta-potential and the adsorption layer thickness of dispersant on the coal surface,it reveals the synergistic interaction mechanism of sodium tripolyphosphate with three different molecular structure dispersant SAF,GCL3S and FDN.The results show that sodium tripolyphosphate can help SAF increase electrostatic repulsion and steric repulsion between coal particles,which result in an increase of Zeta-potential and adsorptive layer thickness,to enhance its dispersing and viscosity-reducing ability,but mainly help GCL3S increase the electrostatic repulsion and help FDN increase the steric repulsion.
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