PERICLASE-SPINEL REFRACTORIES FOR ROTARY CEMENT KILNS

The quality of chromite-periclase and periclase-chromite refractories produced in Russia for lining cement kilns is poor. "Second generation" periclase-spinel refractories are a very promising material for such linings; the charge contains coarse synthetic spinel grains which substantially...

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Bibliographic Details
Published in:Refractories and industrial ceramics 1996-01, Vol.37 (1/2), p.52-54
Main Authors: Shubin, V I, Nikonorov, V I
Format: Article
Language:English
Online Access:Get full text
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Summary:The quality of chromite-periclase and periclase-chromite refractories produced in Russia for lining cement kilns is poor. "Second generation" periclase-spinel refractories are a very promising material for such linings; the charge contains coarse synthetic spinel grains which substantially improve refractory structure and properties, and the impurity content is low. A production technology for periclase-spinel refractories using domestic raw materials was developed. Brucite-containing rocks were shown to be suitable. Preliminary firing of brucite for preparing caustic magnesite; washing to remove CaO; preparation of a caustic magnesite/commercial Al2O3 charge; firing the charge to produce spinel; firing caustic magnesite to produce periclase; preparation of the periclase/spinel charge; pressing; and firing of articles are outlined. The composition and properties of the refractories obtained are shown, and indicate a higher ultimate compressive strength, temperature at beginning of deformation under load, and heat resistance compared with previous products. 3 refs.
ISSN:1083-4877