PRODUCTION AND EQUIPMENT
STRENGTHENING THE BLADES OF A HIGH-SPEED MIXER
ON THE BASIS OF WEAR CURVES
D. I. Simisinov,
A. I. Afanas’ev,
and V. Ya. Potapov
Translated from Novye Ogneupory, No. 9, pp. 8 – 10, September, 2015.
Original article submitted May 28, 2015.
This article describes the pattern of longitudinal wear of the blades of high-speed mixers. It has been estab
lished that it is best to strengthen the blades by reinforcing them with hard-alloy plates of variable thickness.
Keywords: high-speed mixer, wear curves, hard alloy, hard-alloy plates.
The industrial manufacture of refractory products neces-
sarily entails the preliminary production of a refractory mix.
Batches of the mix are prepared with the use of high-speed
mixers, which should be designed so as to maximize the
thixotropic properties of the mix. One of the main problems
encountered in the use of mixers is the durability of the
blades, which undergo rapid wear. The type of blading com-
monly used consists of several blades secured to a rotating
shaft . The principle of operation of the mixer is based on
high-speed mixing. The mixer (Fig. 1) includes the working
element 1 and a rotating mixing container 2. The rapidly re
volving working element is displaced by the amount s rela
tive to the center of the container.
The experience in  shows that the nonuniformity of
the wear of the blades is characterized by a factor ranging
from 2 to 5. The main characteristics of the blades’ wear
curve are determined by the nonuniformity and variability of
the conditions under which wear takes place and the effect of
the environment. Thus, to smooth out the wear curve, it is
necessary to subject the working surface of the blades to
variable local strengthening, i.e. the working surface of the
blades should be reconditioned in such a way as to impart
variable wear resistance. The surface strengthening of parts
based on a wear curve was studied by L. V. Krasichenko and
V. A. Shadchinev . Strengthening a machine part based on
its wear curve essentially means requiring uniform local
wear resistance on the parts of its surface that undergo wear.
We should mention the connection between the principle of
surface hardening based on wear curves and reconditioning
performed with the use of auxiliary parts. These parts, which
are made so as to have different properties and are installed
in accordance with the wear curves, can be effectively used
to realize the same strengthening principle. In the case of
mixer blades, the parts are hard-alloy plates that reinforce the
blades’ working surface.
Refractories and Industrial Ceramics Vol. 56, No. 5, January, 2016
1083-4877/16/05605-0453 © 2016 Springer Science+Business Media New York
Ural State Mining University, Ekaterinburg, Russia.
Fig. 1. Main design parameters of the mixer: 3 ) bottom-side
scraper; 4 ) blades; the remaining notation is explained in the text.