壬基酚聚氧乙烯醚聚合度对水煤浆浆体性质的影响

Additives have usually been used to improve the slurryability and rheological behavior as well as static stability of coal water slurry (CWS). The effect of polymerization degree of polyoxyethylene nonyl phenyl ether (PNPE) on the properties of CWS prepared from 8 coals was investigated. It is found that CWS with high coal content can be prepared when PNPE polymerization degree is in a optimal range from 40 to 80. The relationships between coal properties and maximum concentration of slurry and minimum flow index were analyzed by Multiple Linear Regression method. Regression results suggest that low value of moisture content and low value of small pore volume are favourable to the slurryability of CWS when PNPE additive is added, and large value of vitrinite reflectance (Rmax) facilitates the formation of CWS with the rheological behavior of pseudo plasticity. The static stability test results show that the important factors determine the CWS properties are high rank of coal, low inertinite content, and suitable PNPE additive polymerization degree as well as.