高视密度负极铅膏和膏工艺

Technology of mixing paste in making high apparent density negative electrode lead paste

要使牵引用铅酸蓄电池循环耐久能力达到1 500 次左右,兼顾容量和寿命的关系,其负极铅膏的视密度应控制在(4.6±0.1) g/cm3 。按通常的和膏工艺,这样高的视密度的铅膏稠度高,膏体硬,难以涂填成生极板。铅膏添加剂中的有机表面活性物质由于种类不同,其表面张力不同,影响到铅粉的吸水能力也不同。有的添加剂如木素磺酸钠对铅粉的吸水量有明显影响。在稠度值相同时,铅膏中加入这样的添加剂,其吸水量明显减少,因而可提高视密度。灵活正确地选择配方材料、组分及其它和膏工艺条件,使适合涂填的高视密度负极铅膏和膏工艺得以实现。

To use the traction lead-acid battery cycle endurance for about 1 500 times, consider between of capacity and life, the apparent density of the lead paste of the negative electrode should be (4.6±0.1)g/cm3. According to the usual technology of mixing paste, the lead paste in so high apparent density with high consistence and rigidity is hard to be made green plates, if the paste is manufactured in the traditional technology. The surface active material of the lead paste is different, its surface tension is different too. So there are some differences in absorbing water between the powder of lead oxide and any others. Some additives, such as sodium lignosulfonate significantly effects lead powder to absorb water. If they are in the same value of the consistence, the lead paste with such additives has less water, so it can raise the apparent density. To realize the technology, the materials, chemistry and technology conditions shoud be selected in aright and dexterous way.