Shuangdeng battery production enterprises all production processes are different degrees of lead dust, lead smoke based on the harmful substances, a small number of processes and sulfuric acid fog overflow.Lead (Pb), a pale metal, has an atomic weight of 207.20, a specific gravity of 11.34, a melting point of 327.5℃ and a boiling point of 1620℃. When heated to 400~500℃, a large amount of lead vapor escapes and rapidly oxidizes into lead oxide in the air, while condensing into soot.Lead compound dust, such as lead oxide (also known as huangdan, mituo seng), lead tetroxide (also known as red Dan), lead dioxide, lead trioxide, lead sulfide, lead sulfate and other forms of dust escape into the air.

Shuangdeng battery plate in the charging process with dilute sulfuric acid electrolyte temperature can reach 40~50℃, that is, sulfuric acid vapor overflow.When the charging process enters the middle and late stage, a large number of bubbles will appear in the charging tank, and the electrolyte is in a "boiling" state. At this time, the evaporation amount of sulfuric acid fog is the largest.Carbon black is a lead paste additive for lead-acid batteries. It appears in the form of light dust.

 双登蓄电池生产企业的所有生产工序均不同程度地产生以铅尘、铅烟为主的有害物质，少部分工序还有硫酸雾的溢散。铅(Pb)，灰白色金属，原子量为207.20，比重为11.34，熔点为327.5℃,沸点为1620℃，加热至400~500℃时，即有大量铅蒸气逸出，并在空气中迅速氧化成氧化亚铅，而凝集为烟尘。铅的化合物粉尘，如氧化铅(又称黄丹、密陀僧)、四氧化三铅(又称红丹)、二氧化铅、三氧化二铅、硫化铅、硫酸铅等均以粉尘形式逸出散到空气中。

　　双登电池极板在充电过程中以稀硫酸为电解液的温度能够达到40~50℃时，即有硫酸蒸气溢出。当充电过程进入中后期，充电槽内会冒出大量气泡，电解液呈“沸腾”状态，此时，硫酸雾的蒸发量最大。碳黑是铅酸蓄电池铅膏添加剂，以轻质粉尘的形态出现，其粒径一般在1μm以下。