An evaporation plant and recovery boiler supplied by Metso, Helsinki, Finland, for the Brazilian company Eldorado Celulose e Papel S.A. started up on December 1, at Eldorado’s Três Lagoas mill in Brazil. The Três Lagoas mill, reportedly the largest single-line pulp mill in the world, uses Metso’s equipment in its recovery line.
The evaporation plant, with a capacity of 1,600 metric tons per hour of evaporated water, is the largest single-line evaporation plant for concentrating black liquor to 80 percent dry-solids content, used for low-emission combustion in the recovery boiler.
The recovery boiler also is among the largest in the world, according to Metso, with a black liquor burning capacity of 6,800 metric tons of dry solids per day and steam generation of 1,109 metric tons per hour. The steam is used in the pulp manufacturing process and to generate power for the plant and surplus power. The recovery boiler has high chemical recovery efficiency, making the mill economically and environmentally sustainable.
Eldorado Celulose e Papel, controlled by J&F Holding, has plans to build three parallel pulp lines by 2020. These lines will produce a total of five million metric tons per year.