PRODUCTION AND EQUIPMENT
CONTEMPORARY TECHNOLOGY FOR PREPARING
HIGH DENSITY PERICLASE POWDER
M. B. Sharov,
M. A. Eroshin,
and M. I. Nazmiev
Translated from Novye Ogneupory, No. 9, pp. 17 – 19, September, 2009.
Original article submitted May 22, 2009.
A unit has been put into operation in OAO Kombinat Magnezit for producing densely sintered periclase. A
production scheme is described. Advantages are demonstrated for using high-density periclase powder for
preparing refractory objects compared with powders sintered in a rotary furnace.
Keywords: periclase powder, densely sintered periclase clinker, calcined magnesite, rotary furnace.
Under severe competition conditions in the refractory
market an effective innovation strategy is development of an
enterprise. One of the main points of the development strat-
egy in 2008 is the construction and introduction into opera-
tion of a unit for producing densely sintered periclase clinker.
The capacity of the unit is 50,000 tons of product per year.
Previously, before deciding to construction a unit for produc-
ing densely sintered periclase a series of test works were car-
ried for preparing densely sintered clinkers from different
magnesites and periclase-containing materials, and the re
quirements were determined for the starting raw material;
subsequently starting components were obtained for clinker
production with the required parameters. As a result labora
tory tests and research work the optimum production scheme
was developed for equipment (Fig. 1) and its performance.
The main production equipment was assemblies from lead
ing European producers, a mill from Hosakava Alpine, roller
presses from Verexk, a cone crusher from MFL, and a
high-temperature furnace from the firm RCE.
The unit for producing densely sintered periclase clinker
included calcifying firing of the raw magnesite fraction finer
than 40 mm in rotary furnaces, screening to a fraction finer
than 2 mm and coarser than 2 mm of calcined magnesite af
ter firing at about 1200°C (Table 1). As a result of prior cal
cination there was enrichment and balancing of the material.
Then the calcined magnesite prepared entered the unit di
rectly where it was subjected to fine grinding in a pipe mill
with a closed separation cycle. Calcined magnesite after
grinding has a specific surface (external) of about 1.5 m
and it contains not less than 90% of grains with a size less
than 20 mm. Fine grinding promotes preparation of more
densely sintered material and additional blending of it. After
grinding the material is briquetted in roller presses under a
pressure of 3000 kN and fed to a shaft furnace for sintering
up to 2200°C (Fig. 2). Grinding, briquetting and firing is au-
tomated to the maximum, the main control parameters for
Refractories and Industrial Ceramics Vol. 50, No. 5, 2009
1083-4877/09/5005-0333 © 2009 Springer Science+Business Media, Inc.
Proc. International Conference of Refractory Workers and Metal
lurgists (Moscow 23 – 24 April, 2009).
OOO Gruppa Magnezit, Moscow, Russia.
OAO Kombinat Magnezit, Satka, Chelyabinskoi Region, Russia.
TABLE 1. Chemical Analysis of Calcifying Firing Products, %
MgO (as calcined
<2 mm (whole product) 96.2 1.1 1.3 1.5
>2 mm (enrichment tailings) 91.1 3.7 3.4 1.8
Fig. 1. Production scheme for high density periclase powder.