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Black Liquor Spraying Orientation Determination in Kraft Recovery Boiler, 2022PEERS/IBBC Conference (22PEE/22IBB)

Fate of phosphorus in the recovery cycle of the kraft pulping process, TAPPI Journal March 2020

ABSTRACT: The accumulation of nonprocess elements in the recovery cycle is a common problem for kraft pulp mills trying to reduce their water closure or to utilize biofuels in their lime kiln. Nonprocess elements such as magnesium (Mg), manganese (Mn), silicon (Si), aluminum (Al), and phosphorus (P) enter the recovery cycle via wood, make-up chemicals, lime rock, biofuels, and process water. The main purge point for these elements is green liquor dregs and lime mud. If not purged, these elements can cause operational problems for the mill. Phosphorus reacts with calcium oxide (CaO) in the lime during slaking; as a result, part of the lime is unavailable for slaking reactions. The first part of this project, through laboratory work, identified rhenanite (NaCa(PO4)) as the form of P in the lime cycle and showed the negative effect of P on the availability of the lime. The second part of this project involved field studies and performing a mass balance for P at a Canadian kraft pulp mill.

New Revenue Opportunities for Pulp and Paper Sector from Carbon Capture, 20PEERS Conference

New Revenue Opportunities for Pulp and Paper Sector from Carbon Capture, 20PEERS Conference

Incorporation of Post-Consumer Pizza Boxes in the Recovered Fiber Stream: Impacts of Grease on Finished Product Quality, 20PEERS Conference

Incorporation of Post-Consumer Pizza Boxes in the Recovered Fiber Stream: Impacts of Grease on Finished Product Quality, 20PEERS Conference

Rehabilitating Aging Plant Pipelines with Minimal Operational Downtime, 20PEERS Conference

Rehabilitating Aging Plant Pipelines with Minimal Operational Downtime, 20PEERS Conference

WHERE RCM FITS IN THE MAINTENANCE PROGRAM:, 20PEERS Conference

WHERE RCM FITS IN THE MAINTENANCE PROGRAM:, 20PEERS Conference

How do mud balls form in lime kilns?, TAPPI Journal April 2023

ABSTRACT: Mud ball formation in lime kilns has been a persistent problem in many kraft mills, particularly for older kilns that are equipped with chains. A systematic laboratory study was conducted to examine how mud balls are formed and the key factors that affect ball formation. The results confirm the general mill experience that high moisture and high sodium contents in lime mud are the main contributing factors to ball formation. The high moisture content allows lime mud to agglomerate and grow to form balls, while the high sodium content helps make the balls hard and retain their shape. A ball formation mechanism is proposed to explain how mud balls form and grow near the kiln feed end.

USING BLEACHING STAGE MODELS FOR BENCHMARKING HARDWOOD ECF BLEACH PLANTS, 2023 PEERS Conference

Continuous Digester Process Safety Improvements • Stress Corrosion Cracking and Overpressure Protection Lessons Learned and Opportunities, 2023 PEERS Conference

Factors Affecting Phosphorus Up-take/Dissolution during Slaking and Causticizing, 2023 PEERS Conference