高泥化煤泥水沉降试验研究

针对平顶山天宏选煤厂煤泥水泥化程度高、难处理的问题,采用新型AL系列絮凝剂强化煤泥水沉降效果。首先对煤泥进行筛分试验、X射线衍射和红外光谱分析,并对AL系列絮凝剂进行红外光谱分析。在此基础上对煤泥水进行单一絮凝剂沉降试验和絮凝剂+凝聚剂协同沉降试验,并探讨了絮凝剂、凝聚剂对煤泥水沉降特性的影响机制。     

Effect of lead foam grid on performance of lead-acid battery

In order to increase the specific energy and specific power of a lead-acid battery, lead foam grid was prepared by electrodepositing Pb-Sn alloy on a copper foam substrate and used as negative current collector for a lead acid battery whose capacity was limited by the negative plate. Comparing the effect of the cast grid, under the same conditions, the mass of lead foam grid decreases by 35% , and the area of lead foam contacted with active material increases by about 20 times. Under 2 h rate discharge condition, with a high current (3.0 I2 ) e and low-temperature ( -10℃,I2) discharge system, the lead foam grid markedly boosts the discharge performance of lead acid battery. It increases not only the negative electrode mass specific capacity by 27% ,37% and 29% ,but also the utilization efficiency of the negative active material by 5%. Compared with the negative electrode of cast grid, XRD and SEM results show that after 20 cycles at the state of charge, the sponge lead in the negative lead foam electrode has smaller crystals and less PbSO4 on its surface. Meanwhile, at the state of full discharge, the PbSO4 crystals are smaller and occur less on the surface of lead foam electrode. This indicates its active material reacts more uniformly.