TAILIEUCHUNG - Filler Recovery Process to Recover Raw Material in the Paper Mill Mineral Loaded Rejects

This paper examines how the effort choices of workers within the same firm interact with each other, and how this interaction depends on the technology of production. In contrast to the existing literature, we focus on showing how the effort choice of one worker can affect the effort choices of his co-workers based purely on income-maximizing considera- tions, rather than relying on behavioral explanations such as peer pressure, shame, etc. In addition, we break from the existing literature by showing that the effortchoiceofone worker could have a positive or negative effect on his co-workers. . | Technology Fact Sheet for Cleaner Production in Pulp and Paper Industry 7959 Network for Industrial Environmental Management UNEP - ROAP Bangkok Thailand School of Environment Resources and Development Asian Institute of Technology Bangkok Thailand Fact Sheet No 1 Title of Technology Filler Recovery Process to Recover Raw Material in the Paper Mill Mineral Loaded Rejects Technology Applied in Raw Material Preparation Stage Bleaching Stage Recycled Fiber Technology Paper Making Stage Pulping Stage Chemical Recovery Stage Stock Preparation Stage Utilities Effluent Treatment Technology Implementation Results in Reduction of Energy Consumption Pollution Volume Load Others Process Technology Description The FilRec process recovers the useful filler which is the raw material in the paper making stage and alters them to the paper furnish quality. The process starts with the fractionation stage using pressure screen or bow screens which separates out the coarse rejects stiff fibers shives and other coarse solids like dirt and the fine fractions containing minerals and water. The fine fractions from the fractionation stage are sent to the filler recovery stage which is a special type centrifugal cleaner separating out the mineral solids based on the particle size. Fine fillers with water are sent back to the papermaking stage and the coarse solids are sent to the mineral dispersion stage after concentrating them to 30 - 50 solids. In the mineral dispersion stage the coarse minerals are broken down with the help of a heavyduty dispersion machine. In this continuously circulated dispersion loop comprising of the filler recovery and mineral dispersion stage fine filler is recovered. The coarse fraction from the fractionation stage is classified in the final rejects stage. The reusable fibers and fine fillers are returned to the paper machine. The final rejects are sent for final disposal. Benefits and Investments Required Expected Benefits In absolute figures or Description .

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