Results of Causticizing Plant Targets on the Kraft Pulp Mill Operation, 2023 PEERS Conference

The Kraft mill causticizing area is often overlooked and undervalued when it comes to mill optimization; however, the operation of the causticizing plant has downstream effects on the entire liquor cycle. Setting the right targets for the causticizing plant can have a tremendous effect on mill operating costs as well as push the production bottleneck from one unit operation to another. The key performance parameters associated with the causticizing plant itself are liquor total alkali and causticizing efficiency. Individual facilities choose their total alkali and causticizing efficiency targets based on their goals, the limits of their equipment, and past experiences. This gives a variety of operating strategies in practice, but what are the implications for optimizing total alkali and causticizing efficiency, and what level of optimization can be achieved through implementation of modern technology? This paper reviews the results of several different operational strategies and models the effects of these different approaches on Kraft mill liquor cycle.

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