White liquor plant

The white liquor plant covers recausticizing and lime kilns and completes the chemical recovery cycle by converting green liquor to white liquor. In this process, most of the Na2CO3 in the green liquor is turned back into NaOH in white liquor, which can then be used for cooking liquor. The aim of the process is to produce as much strong white liquor as possible and as efficiently as possible.

Green liquor handling

Valmet offers products that separate dregs from green liquor and increase the efficiency of the recausticizing process. The dregs handling encompasses systems that wash and dewater dregs efficiently with minimal or no mud consumption.

Cooling, slaking and causticizing

Optimum recausticizing is performed by products that provide an efficient and controlled reaction between green liquor and lime.

White liquor handling

White liquor from the plant should be of a consistent quality and have the optimal strength suitable for the plant. Modern digesters need a high and consistent quality of white liquor to produce the optimal pulp quality and yield.

Lime mud handling

Valmet’s lime-mud dewatering system ensures good washing of the lime mud and high dry-solids content.

Lime kiln

Valmet’s lime kiln system ensures reliable and energy efficient production of high quality lime for the recausticizing operation.

Over 100 White Liquor Oxidation systems delivered by Valmet

Jan 22, 2025

White Liquor Oxidation increases mill’s internal chemical circulation, reduces operational costs, and reduces the need for make-up chemicals.

Valmet and Suzano – a successful journey together

Apr 24, 2024

In 2011, Valmet was selected to supply the main technology for pulp production and recovery at Suzano’s mega mill project near the city of Imperatriz in the north of Brazil. In 2013, the mill was completed, and the first bales were produced. Today, we celebrate a decade of continuing successful collaboration.

The BioCMPC project – A leap in sustainability and operational efficiency

Aug 9, 2023

BioCMPC – a major upgrade and modernization project of CMPC Guaíba mill’s line 2 – opens the next chapter in the mill’s story. The investment will result in a major leap in the mill’ sustainability and operational efficiency, and increase their annual pulp production capacity by 350 thousand tonnes.

Valmet and Naini Paper in India experience smooth cooperation on major fiberline project

Jul 26, 2023

Naini chose Valmet in 2019 as the main supplier of the key process technology for making bleached hardwood kraft (BHK) pulp. The new line has now been successfully producing high quality pulp since the very smooth startup, even above the originally designed daily capacity.

LD Celulose’s new mill meets the needs for sustainable dissolving pulp

May 24, 2023

LD Celulose’s new mill in the Triângulo Mineiro region, Brazil, is one of the largest dissolving pulp mills in the world. The mill was started up in April 2022 and is setting new productivity and energy efficiency standards.

Valmet G2 Green Liquor Clarifier was successfully installed in Stora Enso’s pulp mill in Skoghall

Feb 17, 2023

Stora Enso’s pulp mill in Skoghall recently installed a Valmet Green Liquor Clarifier G2. With this investment, the mill has ensured improved green liquor handling and high availability.

All the pieces coming together for fossil free pulp production

Jan 23, 2023

Construction of the Metsä Fibre Kemi bioproduct mill is in full swing, with 3,500 people working at the site to start up a mill that is world class in energy, environmental, and material efficiency. The completely fossil fuel free new mill is scheduled to start up in the third quarter of 2023.

Strong teamwork brings success to SCA Obbola

Jan 23, 2023

SCA’s increased production capacity project at their kraftliner mill in Obbola, Sweden, is nearing completion. Close collaboration and good dialogue between the SCA and Valmet teams have delivered positive results.

Our expertise is at your service

Our focus is to bring your performance forward utilizing our extensive experience and in-depth knowledge of pulp process technology. Get in touch with our experts through your local Valmet office, or the link below.