Skip to page content
USDA Forest Service
  
Treesearch

Research & Development Treesearch

 
Treesearch Home
About Treesearch
Contact Us
Research & Development
Forest Products Lab
International Institute of Tropical Forestry
Northern
Pacific Northwest
Pacific Southwest
Rocky Mountain
Southern
Help
 

GeoTreesearch


Science.gov - We Participate


USA.gov  Government Made Easy


Global Forest Information Service

US Forest Service
P.O. Box 96090
Washington, D.C.
20090-6090

(202) 205-8333

You are here: Home / Search / Publication Information
Bookmark and Share

Publication Information

(739 KB)

Title: Chapter 7:Mineral Scale Management

Author: Rudie, Alan W.; Hart, Peter W.

Date: 2012

Source: In: The Bleaching of Pulp, 5th Edition; Tappi Press 2012. pp. 175-215.

Publication Series: Journal/Magazine Article (JRNL)

Description: Mineral scale problems are not new to pulp mills and bleach plants. The liquor recovery system ensures that white liquor is saturated in calcium carbonate, and this mineral will precipitate when heated to cooking temperatures in the digester [1,2]. The original single-vessel continuous digesters sold by Kamyr had an extra liquor heater as standard equipment to enable the mill to take one heater out of service for acid cleaning without impacting production [3]. Although lime scale in the digester is generally the most routine scaling problem in pulp mills, various other scales are common in the chemical recovery area [4,5], and several types of mineral scale can turn up in bleach plants or on the paper machines. Efforts to reduce wastewater discharge using countercurrent filtrate recycle schemes in the bleach plant [6,7] certainly increased problems with mineral scale, but except with direct countercurrent filtrate management [8], scale problems were usually not severe. Mechanical pulping operations can also have problems with scale, partially because these processes are less efficient at removing.

Keywords: Mineral deposits, mineral scale, calcium oxalate, calcium carbonate, barium sulfate

Publication Notes:

  • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

XML: View XML

Citation:


Rudie, Alan W.; Hart, Peter W. 2012. Mineral scale management. In: Hart, Peter W.; Rudie, Alan W., eds. The Bleaching of Pulp, 5th Edition. Peachtree Corners, GA: Tappi Press. 175-215, Chapter 7.

 


 [ Get Acrobat ]  Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility

USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.