| Bibliographic Citation | |
| Full Text |  1 Mb |
|---|---|
| DOI | 10.2172/758727 |
| Title | Removal of Wax and Stickies from OCC by Flotation |
| Creator/Author | M. R. Doshi ; J. Dyer |
| Publication Date | 2000 Jan 31 |
| OSTI Identifier | OSTI ID: 758727 |
| Report Number(s) | DOE/ID/13563 |
| DOE Contract Number | FC07-97ID13563 |
| DOI | 10.2172/758727 |
| Other Number(s) | TRN: AH200029%%52 |
| Resource Type | Technical Report |
| Resource Relation | Other Information: PBD: 31 Jan 2000 |
| Coverage | Final |
| Research Org | USDOE Idaho Operations Office, Idaho Falls, ID; Doshi and Associates, Inc., Appleton, WI (US) |
| Sponsoring Org | USDOE Office of Industrial Technologies (OIT) (EE-20) (US) |
| Subject | 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; PAPER INDUSTRY; WAXES; ADHESIVES; REMOVAL; FIBERS; FLOTATION; SLURRIES; WASHING |
| Related Subject | WAX; FROTH FLOTATION; FIBER; DETACHMENT; PULPING; OCC REPULPING PROCESS; FURNISH; REVERSE CLEANING |
| Description/Abstract | Laboratory research indicates that wax is amenable to removal by froth flotation provided it is free or detached from the fiber. The only effective means, at this time, of maximizing detachment of wax is through the use of low consistency pulping at temperatures above the melting point of wax. Wax removal from WCC through washing, flotation, or a combination of both was approximately 90% in these laboratory studies, indicating that not all of the wax is detached from fibers. These results were summarized in Annual Report 1, December 1, 1997 to November 30, 1998. Pilot trials were conducted in which the authors simulated a conventional OCC repulping process with and without flotation. Additional aggressive washing and water clarification were also examined during the study. The inclusion of flotation in the OCC stock preparation system significantly improved the removal of wax spots and extractable material from the furnish. Based on this study, the authors predict that a compact flotation system with 2 lb surfactant/ton of fiber would improve the OCC pulp quality with regard to wax spots by 60% and would not negatively affect strength properties. Flotation losses would be in the 2-5% range. Two mill trials were conducted during the last quarter of the project. One trial was carried out at Green Bay Packaging, Green Bay, WI, and a second trial was conducted at Menasha Corporation, Otsego, MI. A 250-liter Voith Sulzer Ecocell was used to evaluate the removal of wax and stickies from the OCC processing systems at these two mills. The inclusion of flotation in the OCC stock preparation system significantly improved the removal of wax spots from the furnish. The data indicate that flotation was more effective in removing wax and stickies than reverse cleaners. The mill trials have demonstrated that flotation can be substituted for or replace existing reverse cleaning systems and, in some cases, can replace dispersion systems. In this manner, the use of flotation can provide significant energy savings when compared to reverse cleaning or dispersion. |
| Country of Publication | United States |
| Language | English |
| Format | Medium: P; Size: 26 pages |
| Availability | OSTI as DE00758727 To purchase this media from NTIS, click here |
| System Entry Date | 2008 Feb 05 |
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Last Updated: 11/20/2009