Exercise-1

A lead blast furnace uses a burden comprising of sinter, skimmings, limestone, cinder and coke. The analysis of the burden is:

Sinter (150 Tons) PbS 18%, PbSO₄ 6%, PbO 28%, Cu₂S 1%, Fe₂O₃ 19%, SiO₂ 22%, CaO 6%, 2.268 kg silver/ton sinter









The slag contains . Neglect any lead in slag and gases. 2/3rd of the copper charged enters in the matte and 1/3rd enters into lead bullion. All sulphur goes into matte. All silver enters lead bullion.

The gases carry

Find:

a) The charge balance of the furnace.

b) % composition of all products

c) Percentage of carbon burnt at the tuyere when 90% carbon of coke is burnt to .