Acid Plant

PT. Smelting commits to protect the environment by processing its exhaust gas to meet government standards. The harmful SO2 gas in copper smelting is converted into the production of Sulfuric Acid liquid which is beneficial for the surrounding fertilizer factory.

1
Gas Cleaning Section

The SO2 gas from smelter is cleaned from the dust in the washing tower, ventury scrubber, gas cooler and mist precipitators.

2
Drying Tower and Main Gas Blower

The cleaned wet gas enters the drying tower in counter current flow with 96% sulfuric acid to capture the moisture.Then the dried gas delivered to converter area through main gas blower.

3
Converter

The dried SO2 gas is converted to SO3 by four beds of Vanadium pentaoxide (V2O5) catalyst which has overall SO2 conversion rate more than 99.8%.

4
Absorption Tower

The SO3 gas out of the third catalyst bed is absorbed into sulfuric acid in the intermediate absorption tower (IAT). The SO3 gas out of the final catalyst bed is absorbed into sulfuric acid in the final absorption tower (FAT) to produce sulfuric acid.


ACID PLANT 1

 

ACID PLANT 2

Waste Water Treatment Plant

PT. Smelting utilizes 3 steps of waste water treatment to ensure the discharge water to the sea within the limit of stringent east java effluent standard. Free acid neutralization will produce Gypsum that is delivered to the cement industry. Heavy metal recovery, together with the final polishing stage, will formed sludge cake that is recycled back to the smelter.

Waste Water Treatment Plant Process