ANDRITZ to Supply SulfoLoop Plant to New Suzano Mill in Ribas do Rio Pardo, Brazil

ANDRITZ has received an order from Brazilian pulp producer Suzano to deliver a SulfoLoop concentrated sulfuric acid plant for its new pulp mill that Suzano is building in the municipality of Ribas do Rio Pardo, Brazil. The pulp mill, delivered by ANDRITZ, is in the construction phase with start-up scheduled for the second half of 2024.

The sulfuric acid plant will have the capacity to produce 153 tons of commercial grade (>97%) sulfuric acid per day from the pulp mill’s concentrated odorous gases and elemental sulfur – thus making the mill completely self-sufficient in sulfuric acid and recycling sulfur from the waste streams. The ANDRITZ SulfoLoop solution is based on the Wet-gas Sulfuric Acid (WSA) technology for converting wet, sulfur-rich gases and elemental sulfur into sulfuric acid.

The sulfuric acid mill will help the new Suzano mill in Ribas do Rio Pardo to control the sodium and sulfur (Na/S) balance and the sulfidity of the pulp mill. Also, the resource-efficiency of the mill will be improved because less sulfate needs to be discharged due to the optimized Na/S balance. An added advantage is that there is no need for hazardous sulfuric acid transport to the mill, which results in a major reduction in the truck transportation volume. The sulfuric acid plant also meets very strict air emission limits and therefore brings a significant improvement to the overall footprint of the new Suzano plant in Ribas do Rio Pardo.