PRODUCTION AND EQUIPMENT
SYSTEM FOR SORTING CRUDE MAGNESITE
AT THE CRUSHING-CONCENTRATION PLANT OF THE “MAGNEZIT”
COMBINE WITH THE USE OF LASER ANALYZER MAYA 6060-M2010
L. M. Aksel’rod,
V. A. Zaitsev,
M. B. Sharov,
A. V. Savchenko,
and A. M. Baryshnikov
Translated from Novye Ogneupory, No. 11, pp. 21 – 24, November, 2012.
Original article submitted June 22, 2012.
This article describes work done in introducing MAYA 6060-M2010 optical-emission laser analyzers and a
sorting system on a comminution line at the crushing-concentration plant of the “Magnezit” combine.
Keywords: “Magnezit” combine, crushing-concentration plant (CCP), magnesite, central plant laboratory
(CPL), in-line laser analyzer, sorting system, laser spectrometry.
The factories of the OOO “Magnezit” Group produce
hundreds of thousands of tons of refractory products and re-
fractory materials in bulk form. The production process for
the main products begins with the extraction of different
grades of magnesite from mines and quarries. The magnesite
has traditionally been mined based on its grade, but pres-
ent-day requirements are more exacting; the materials that
are recovered must be given a more detailed classification. In
addition, it is necessary to ensure that the raw materials used
in technologies developed specifically to make refractories
of the periclase-carbon, periclase-chromite, periclase-spinel,
or other type at the “Magnezit” Combine are of consistently
high quality. The same applies to the raw materials used to
make gunites and the main classes of mortar at the company
“Magnezit-Torkret-Massy” and vibrocast products at the
firm “NPK Magnezit.” In some cases, satisfying the require
ments of a particular technology or customer entails produc
ing periclase powders that meet higher-than-normal stan
dards on the content of the main component — MgO — and
on the contents of the impurity oxides CaO, SiO
, and Fe
After a comparison of systems of flow analyzers that in
cluded testing on different types of units, it was decided to
introduce the use of equipment made by the Israeli company
“Laser Distance Spectrometry.” That company’s representa-
tive in Russia is Icon Steel LLC.
Magnesite recovered from a mine or quarry undergoes
several stages of comminution before it is charged into a
roasting furnace. Pieces of magnesite smaller than 1200 mm
are delivered to a crushing-concentration plant (CCP) by rail
and undergo coarse crushing in a jaw crusher to produce
pieces smaller than 350 mm. The latter then go through the
middle crushing stage on a gyratory crusher (<150 mm) and
a final crushing stage (<40 mm).
The chemical composition of the crude magnesite is
checked by preparing samples from a batch of ore (120 –
170 tons) during the middle crushing stage: five 5 – 7-kg
samples from the <40 mm fraction are collected at certain
time intervals and then mixed together and quartered to ob
tain 5-kg samples. These final samples are sent to the central
laboratory of the plant (CPL) to perform the chemical analy
sis. The system just described does not make it possible to re
liably determine the chemical composition of the entire bank
or to monitor the production process in real time.
In March 2012, two in-line optical-emission laser ana
lyzers of the model MAYA M-2010 (Fig. 1) and a system for
sorting material into two grades were introduced on the sec
ond comminution line of the CCP. The analyzers were in
stalled above belt conveyors that the CCP uses to transport
magnesite finer than 150 mm.
The MAYA analyzer is an automated laser analyzer de
signed for real-time in-line analysis of ores and minerals at
Refractories and Industrial Ceramics Vol. 53, No. 6, March, 2013
1083-4877/13/05306-0353 © 2013 Springer Science+Business Media New York
OOO “Magnezit” Group (Satka, Chelyabinsk Oblast, Russia).
OAO “Magnezit” Combine (Satka).
Icon Steel LLC (Moscow, Russia).