The paste desulfurization system is used at lead acid battery recycling plant to extract sulfur at PbSO4 from lead battery paste .

Contact information: 

Email:  curbing888@hotmail.com ; wechat: curbing1970;  Whatsapp:: https://wa.me/8613923774083.   

1. Why desulfurization for paste?

There are at least four disadvantages  if there are no desulfurization for paste

   1)PbSO4 need 1400 0C temperature for lead reduction, need more energy. PbCO3

    will become PbO at 3500C.Pb can be deducted from PbO at 8000C.

  2) Lead(Pb) will lost through gas due to 1400 0C temperature. The boiling point of lead

      is 15250C

  3) More SO2 will be released to air

  4) Need more additive for lead reduction so melting capacity of furnace is lower

2. Description of working Process for paste Desulfurization system

Desulfurization:

The lead powder PbO+PbSO4 from paste fall in down deposit pool  passing through vibrating

screen.

During this step, the following reactions take place:

(1) H2SO4+2NaOH   → Na2SO4+2H2O 

(2) PbSO4+2NaOH  → Na2SO4+PbO+H2O

Filer press:

The lead  oxide ( PbO)  is in suspension status after desulfurization and pass filer press. The filter

Cake is made by filer press.

Effluent treatment:  The effluent after desulfurization will be treated properly with right

PH through fabric membrane before discharge or pump into recycle water tank.

 Output :

•Lead dioxide from plate ( PbO) •Lead-antimony alloy rice from grid (Pb-Sb) •PP (polypropylene) •ebonite