Factors affecting Canadian pulp and paper prices

1984 ◽  
Vol 14 (5) ◽  
pp. 683-691 ◽  
Author(s):  
B. K. Singh ◽  
J. C. Nautiyal

Price equations for the following product groupings of the Canadian pulp and paper industry were estimated using data from 1955 to 1981: (i) woodpulp; (ii) newsprint; (iii) "other paper and paperboard"; and (iv) "aggregate paper and paperboard," which includes (ii) and (iii). Price equations were formed on the assumption that firms markup average costs of production to set prices. These equations show the effects of factor costs, economies of scale, and technological progress on the prices of the products. They also help understand relevant aspects of production processes. Newsprint and "other paper and paperboard" production costs and prices are most responsive to the prices of material (woodpulp), labour, and energy, while woodpulp price responds more to the prices of pulpwood and energy. Substantial economies of scale are experienced by newsprint and woodpulp sectors. Such economies in the "other paper and board" sector are nonexistent. Technological progress has also contributed to reduction in the costs of production: 4.3% in woodpulp, 4.4% in "other paper and board," and 2.6% in newsprint per annum. Reduction in the cost of obtaining pulpwood to woodpulp sector is important in reducing the cost of paper and paperboard production. Substitution of existing capital with low energy and labour using capital is also required to lower the costs. Also, efforts to modernize the whole industry and the use of available economies of scale are indicated to keep the Canadian pulp and paper industry competitive in world markets.

TAPPI Journal ◽  
2016 ◽  
Vol 15 (3) ◽  
pp. 205-213 ◽  
Author(s):  
J. Peter Gorog ◽  
W. Ray Leary

Ring formation occurs in the rotary kilns used by the pulp and paper industry to regenerate the lime needed to produce white liquor. The main rings are: burning zone rings, mid-kiln rings, dust rings and/or mud balls, and mud rings. While the exact mechanisms of ring formation are not completely understood, frequent changes in the production rate and the mud solids, high soda content in the mud, and high levels of dust are believed to play a major role in ring formation. The presence of rings can restrict the movement of material through the kiln. If undetected, this can result in overheating of the refractory lining. In the worst case, the presence of rings can lead to unscheduled downtime to clean out the ring and replace damaged refractory bricks. Depending on the severity, the cost of repairs and lost production can be in excess of US$3 million for a single event. Even if the root cause of ring formation is known, from a practical standpoint, it can be difficult to eliminate rings. In mills where ring formation is a recurring problem, mechanical ring removal systems should be considered. This paper describes the use of ring removal systems as a cost effective way to mitigate the problems associated with ring formation.


TAPPI Journal ◽  
2018 ◽  
Vol 17 (05) ◽  
pp. 253-258
Author(s):  
Max Moskal

Through the decades, the pulp and paper industry greatly expanded production capacity to meet increasing demands. Correspondingly, the cost of corrosion damage soared. The most serious corrosion control challenges were researched and met by university and governmental researchers, and by task groups within the TAPPI Engineering Division’s Corrosion and Materials Engineering Committee. Today, thanks to material and process advances, mills encounter less corrosion than in the past. This overview takes a historical look back, covering many decades, at how corrosion problems have been managed in the pulp and paper industry. Yet, corrosion keeps on going, and today mills appear less able to manage corrosion problems for which known solutions are available. This paper also addresses the significant yet underrated task of optimizing corrosion control management in the present and into the future. Discussion is provided on best practices needed to mitigate new and ongoing corrosion problems.


1991 ◽  
Vol 24 (3-4) ◽  
pp. 411-415 ◽  
Author(s):  
J. Wartiovaara ◽  
P. Heinonen

During recent years the BOD-loading of pulp and paper mill wastewaters has decreased dramatically, due to more effective circulation of water in the processes, and the new activated sludge biological treatment plants. This traditional threat to the environment has been forgotten by the scientists who nowadays are more interested in the role of chlorine compounds discharged from bleaching processes. However, eutrophication due to nutrient loading is still present in many recipients of pulp and paper industry. The BOD-reduction has often been carried out on the cost of adding nutrients, pnosphorus and nitrogen to the purification processes. The biological treatment has also decreased the inhibitive effect of wastewater on the biological production of the recipient water body. Therefore, the eutrophication arises immediatly. The authors worry about the research of nutrients; loadings, development trends and eutrophication effects.


DYNA ◽  
2019 ◽  
Vol 86 (211) ◽  
pp. 9-16 ◽  
Author(s):  
Jairo J .O Andrade ◽  
Daniel Dreher Silveira

The overall equipment effectiveness (OEE) is an indicator used in the management and continuous improvement of production systems, and is useful in identifying losses, thus reducing production costs. By analyzing the results of this indicator, the operation manager must make decisions to eliminate or reduce losses in the process. This study investigated the application of the OEE indicator in one production line in the pulp and paper industry. The implementation of OEE was performed in stages with a detailed analysis of the indicators that compose the OEE (quality, performance, and availability) to identify possible improvements. Thus, actions were implemented to improve the OEE quality index. This study provided important information that enabled the operation manager to diagnose and minimize the occurrence of failures and losses, which is often hidden and unknown to those involved in the production system.


1992 ◽  
Vol 25 (10) ◽  
pp. 263-276 ◽  
Author(s):  
A. Zaidi ◽  
H. Buisson ◽  
S. Sourirajan ◽  
H. Wood

The kraft pulp and paper industry is currently faced with the challenge of substantially reducing the discharge of conventional and toxic pollutants to the receiving environment without compromising its competitiveness. Ultrafiltration (UF) and nanofiltration (NF) are among the various unit processes that are being investigated by researchers interested in developing alternative schemes for meeting this challenge. The objectives of the work presented here were: (i) to review the potential uses for UF and NF in the kraft pulp and paper industry and (ii) to evaluate the performance of eleven UF and NF membranes using a caustic extraction stage effluent from a kraft mill pulping softwood with a O D55/C45 EO H D bleaching sequence. The experimental work was conducted with two flat-sheets bench-scale units fed in parallel: a low shear and a high shear unit. The most promising UF membrane gave an average permeate flux of 9 m3m2d for a volume reduction factor (VRF) of 30, under high-shear conditions at 0.69 MPa. The associated COD rejections ranged from 85%–90% at a VRF of 1 down to 70–75% at a VRF of 30. While the results demonstrated in this study show promise, further research is needed to demonstrate the cost effectiveness of both high-shear and low-shear equipment for this application as well as options for the reuse or treatment of the diluted and concentrated streams produced by the UF/NF systems.


TAPPI Journal ◽  
2014 ◽  
Vol 13 (6) ◽  
pp. 19-24
Author(s):  
TROY RUNGE ◽  
CHUNHUI ZHANG

Agricultural residues and energy crops are promising resources that can be utilized in the pulp and paper industry. This study examines the potential of co-cooking nonwood materials with hardwoods as means to incorporate nonwood material into a paper furnish. Specifically, miscanthus, switchgrass, and corn stover were substituted for poplar hardwood chips in the amounts of 10 wt %, 20 wt %, and 30 wt %, and the blends were subjected to kraft pulping experiments. The pulps were then bleached with an OD(EP)D sequence and then refined and formed into handsheets to characterize their physical properties. Surprisingly, all three co-cooked pulps showed improved strength properties (up to 35%). Sugar measurement of the pulps by high-performance liquid chromatography suggested that the strength increase correlated with enriched xylan content.


1999 ◽  
Vol 53 (10) ◽  
pp. 1334-1338 ◽  
Author(s):  
Yoshiya Kuide ◽  
Kazuyoshi Yamamoto

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