Supplemental and Recycled Fiber - Fiber Deinking

Wood fiber accounts for more than 90% of the raw material used in the production of paper and board products, and it can come from a variety of sources. These sources can be slushed virgin fiber that is produced onsite, market pulp from other pulp mills, or recycled/secondary fiber. Recycled paper can be broken into several categories including old corrugated containers, mixed paper, and deinking grades. Most deinking grades consist of old newspapers, old magazines and office waste. This course will focus on the equipment and processes used for deinking.

•State the purpose of deinking •Describe the role of repulping, flotation, washing, dispersing, and bleaching in deinking •Explain how surfactants are used for deinking •Explain how flotation deinking works •Describe process and typical equipment for flotation deinking •Explain how pulp is deinked by washing •Describe the process and typical equipment for dispersing •Describe the process and typical equipment for deinked pulp bleaching •Describe safety hazards and guidelines associated with recycled fiber deinking