Educational guide 2017_18
Escola de Enxeñaría Forestal
Grao en Enxeñaría Forestal
  Cellulose, pulp and paper
Topic Sub-topic
1. Pulp, paper and cardboard Requirements and sources of paper fibers. Chemical composition of wood. Behavior of cellulosic fibers
2. Characteristics of the wood Effect of the morphology of the fibers on the properties of the paper. Identification of wood species
3. The resources of the wood. Measurement of wood for pulp. Preparation of wood for the manufacture of cellulose. Quality control of the chips.
4. Processes for obtaining pastas Mechanical, chemical, semi-chemical and dissolving pastes. Comparison of folders and applications thereof.
5. Sulphate process Definition of terms and description of the kraft process. System of recovery of the chemical products. Chemistry of the kraft process and variables affecting sulfate cooking. Control Parameters.
6. Cooking equipment Discontinuous and continuous digesters. Extended delineation. Biorefinerías
7. Processing of the pulp Deflection, knot removal, washing, sorting of pastes, thickening, pumping, storing, mixing, drying, cutting and stacking.
8. Recovery of cooking liquors Evaporation. Recovery boiler. Caustification. Calcination. Recovery of by-products.
9. Bleaching of folders ECF and TCF sequences. Stages of bleaching. Circuit closure
10. Economy and operating strategy of a pasta factory Basic economic considerations. Costs control
11. Preparation of pulp for paper production Disintegration, refining, measurement and mixing of the composition
12. Use of secondary fibers Disintegration of the paperboard and deinking
13. Non-fibrous additives in paper manufacturing Non-fibrous additives applications: bonding, internal strength, wet strength resins, fillers, chemical dyes and pitch control.
14. Paper making Wet and dry part
15. Reduction of contamination Aqueous and atmospheric contamination in the pulp and paper industry
P1. Optical microscopy Observation of hardwood fibers and conifers at different levels of refining. Observation of vessels, tracheids and parenchyma cells of different types of pastes.
P2. Disintegration of pastes. Refining PFI. Schopper Grade Riegler UNE 57026, ISO 5263; UNE 57125, ISO 5264/2; UNE 57025, ISO 5267/1
Send Send Send
P3. I refine on Valley stack. Formation of sheets UNE 57017, ISO 5264/1; UNE 57042, ISO 5269/1
P4. Physical characteristics of the test sheets Gramaje (UNE 57104, ISO 5360); Thickness (UNE 57004, ISO 5270); Tear index (UNE 57033, ISO 1974); Burst index (UNE 57058, ISO 2758); Resistance to air passage. Gurley Method (UNE 57065, ISO 3687)
P5. Case studies Chip quality; Specific consumption of wood; Factor H and G; Solids in black liquors
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