Advanced Search
Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.

Magnesia refractories produced from chemically modified periclase grains and Mg(OH)₂ slurries
Filetype[PDF-6.40 MB]

This document cannot be previewed automatically as it exceeds 5 MB
Please click the thumbnail image to view the document.
Magnesia refractories produced from chemically modified periclase grains and Mg(OH)₂ slurries
  • Description:
    "Based on previous Bureau of Mines research indicating that improved high-temperature properties could be achieved for periclase refractories through chemical additions, the Bureau investigated the properties of full-size bricks produced from chemically modified periclase refractory grains and the suitability of making such chemical additions to mg(oh)2 slurries prior to production of the periclase grains. In full-size brick testing, strength values, both hot and cold, for the optimized bricks were superior to those for a commercial 98-wt-pct-mgo refractory. The best results were obtained for a natural magnesite with an adjusted cao:sio2 (c:s) ratio of 3.0 and a 1.0-wt-pct addition of zro2 and for a seawater periclase with an adjusted c:s ratio of 2.5 and a 0.5-wt-pct addition of mNO2. For samples produced from chemically modified mg(oh)2 slurries, additions of both mNO2 and zro2 and an increase in c:s ratios produced significant increases in hot flexural strength, similar to those resulting from chemical additions made to periclase grains. The most effective modifications were additions of mNO2 to brine- derived periclases having a c:s ratio adjusted to 3.0. These results on chemically modified magnesia refractories indicate that such material could potentially substitute for magnesia-chrome refractories containing imported chromite." - NIOSHTIC-2 NIOSHTIC no. 10003303
  • Document Type:
  • Main Document Checksum:
  • File Type:
  • Supporting Files:
    No Additional Files
No Related Documents.

You May Also Like: