焦化废水制备水煤浆的成浆性能

焦化废水是一种典型的成分复杂、污染严重、处理难度大的工业废水。本文将焦化废水作为原料制备水煤浆，研究了温度、煤粉粒度对成浆性能的影响，通过扫描电镜照片与红外光谱探讨了对成浆的影响。结果表明，焦化废水的最大成浆浓度比去离子水稍低；在一定温度范围内，焦化废水水煤浆表观黏度随温度升高而降低，浓度越高黏度变化越明显；细煤粉的成浆性较差，粗煤粉占70%时，成浆性最好；扫描电镜和红外光谱的结果显示，焦化废水中的金属离子会吸附在煤粉表面，影响分散剂吸附，使浆体黏度上升。利用水煤浆技术处理焦化废水，可以通过简单的工艺和较低的成本，实现焦化废水无害化、资源化利用，具有良好的经济效益与环保效益。

Slurry property of coal water slurry prepared by coking wastewater

Coking wastewater is a typical industrial wastewater with complex composition, serious pollution and difficult treatment. It was used as raw material to prepare coal water slurry. The effects of temperature and coal particle size distribution were studied. The impact was studied by scanning electron microscopy (SEM) and infrared spectroscopy. The results showed that the maximum coal content of coking wastewater was slightly lower than that of deionized water. In a certain temperature range, the apparent viscosity of coking wastewater water coal slurry decreased with the increase of temperature. The higher the concentration, the more obvious the change of viscosity. Fine coal powder has poor slurryability, and when the coarse coal powder accounts for 70%, the slurry concentration is the highest. The results of scanning electron microscopy and infrared spectroscopy showed that the metal ions in the coking wastewater will adsorb on the surface of the coal powder, affect the adsorption of the dispersant to increase the viscosity of the slurry. The use of coal water slurry technology to treat coking wastewater can realize the harmless and resource utilization of coking wastewater through simple process and low cost, and has good economic and environmental benefits.