ISSN:
1573-9139
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Conclusions The action of scale on periclase, spinel, corundum, periclase-chromite, and chromite-periclase specimens (production and laboratory) at 1650°C in commercially pure nitrogen was investigated. A method was developed for production of periclase, spinel (aluminomagnesia), and periclase-chromite spherical packings by the pelletizing method. It was shown that pelletizing of fused periclase and of mixtures based on it is possible only with the addition during vibrogrinding of a surface-active hydroxylated alcohol-base alkyl phosphate paste in a quantity of 0.1% and alternate moistening of the powder being pelletized with a suspension of glycerine residue in silica sol and a solution of lignosulfonate and methyl cellulose. Tests were made of the action of scale on pellets of all of the compositions at 1650°C in commercially pure nitrogen under load and without load. The preferable spherical packing materials for service under such conditions are periclase with a density of not less than 3.12 g/cm3, corundum with zero porosity, and spinel of stoichiometric composition with a density of not less than 3.36 g/cm3. In addition, the use of periclase-chromite with a density of not less than 3.32 g/cm3 is possible.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01326649
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