LD Celulose S.A invested about USD 1.3 bn in a 500,000 ton/year dissolving wood pulp mill in the Triângulo Mineiro region in Brazil


Customer: LD Celulose S.A 

Production: Pulp

Supplier: Valmet

Description: LD Celulose S.A, a joint venture between the Austrian company Lenzing and the Brazilian company Dexco, invested about USD 1.3 bn in a 500,000 ton/year dissolving wood pulp mill in the Triângulo Mineiro region in Brazil. Valmet delivered the key process islands and integrated automation solutions for the mill. The equipment operations and the production ramp-up in the new mill have now successfully started.

Valmet delivered the project with extended scope of supply. Detailed engineering for the project was started in the beginning of 2020 and the installation works at the site in the beginning of 2021.

Details: Valmet’s complete delivery included a fiber line, a pulp drying and baling line, an evaporation plant, ash crystallization, a white liquor plant, mill-wide automation system, analyzers and training simulators for all process areas.

The fiber line features Valmet TwinRoll technology for high washing efficiency with low chemical and water consumption. The pulp drying and baling line is designed to handle the special requirements of dissolving pulp in an energy efficient way and ensures high-quality pulp and easy operation with the support of the Valmet Quality Control System.

The evaporation plant features Valmet Tubel technology for high availability and produces clean condensate quality for 100% reuse in the mill. The white liquor plant includes recausticizing and lime kiln and is designed for high reliability and less maintenance. The Valmet Ash Crystallizer has a capacity of 300 tons of ash per day and will recover mill chemicals and remove non-process elements, primarily chloride and potassium, from the mill’s liquor cycle.

The mill-wide automation system, Valmet DNA, stands out with its innovativeness being built on the latest virtualization technology, allowing a completely new way to operate the mill and integration with analyzers.

Valmet Operator Training Simulator (OTS) will be used in all process islands, from the beginning to the end of production, with a total of 14 process areas. An innovative fact of the project is that its wood handling area is the first in Brazil to use OTS technology. Another highlight is the presence of simulators for the areas of water treatment, water treatment for boilers, effluent treatment and turbines, commonly little explored in the OTS. This demontrates the commitment of LD Celulose to implement for more efficient, optimized processes focused on the safety and excellence of its operational team.