REVIEW OF RF PATENTS FOR REFRACTORY INVENTIONS
Review prepared by the editorial staff of Novye Ogneupory
Translated from Novye Ogneupory, No. 12 p. 61, December 2009.
MAGNESIUM PHOSPHATE CEMENT
N. F. Kosenko and L. A. Vinogradova
RU Patent 2344101
Magnesium phosphate cement, including magnesium ox
ide and orthophosphoric acid, is distinguished by the fact that
it contains magnesium oxide processed in a ball mill for
6 – 10 min in the presence of 0.01 – 3% magnesium dihydro-
phosphate with the following ratio of components, wt.%:
24.05 – 32.03 magnesium oxide, 67.97 – 75.95 orthophos-
Magnesium phosphate cement is distinguished by the
fact that the magnesium oxide it contains is reactive magne-
sium oxide, or caustic magnesite, or sintered magnesite.
This magnesium phosphate cement relates to a phosphate
binder material and may be used in the production of high-
temperature materials and coatings, magnesia unmolded re-
fractories (ramming mixes and concretes).
Inventions Bulletin: Utility Models,
No. 2, 685 (2009).
CARBON-CONTAINING REFRACTORY MATERIAL
AND ITS METHOD OF PREPARATION
L. N. Ruzhevskaya, N. P. Nonishneva, T. V. Khazova,
and S. A. Podkopaev
RU Patent 2344105
MPK S04V35/532, S04V35/81, S04V35/52
The preparation method for carbon-containing refractory
material includes the fact that as a charge the following com
ponents are take: thermoanthracite, part of which has the
fractions 0 – 0.5 and 0 – 1.25 mm, graphite fraction 0.005
and 0 – 1.25 mm, coal-tar pitch in the form of a fluid viscous
resin, silicon carbide fraction <0.071 mm, silicon metal frac
tion <0.071 mm, and aluminum oxide powder. The loose
components are weighed and mixed, pitch heated to
140 – 150°C is added to them and mixed for 30 – 45 min.
Then by means of an extruder blast furnace blocks with a
size of 600 ´ 600 ´ 300 mm are molded under a pressure of
(5 MPa) at 135°C. The blocks are heat treated in
gas chamber furnace followed by furnace cooling for six
days. The preparation method for carbon-containing refrac
tory material is distinguished by the fact that in the charge
there is an additionally ground iron, with the following ratio
of components, wt.%: 40 – 55 thermoanthracite, with a frac
tion size of the skeleton-forming part of 1.25 – 2.25 mm,
20 – 36 graphite, 16 – 21 coal-tar pitch, 8 – 15 silicon car-
bide, 5 – 8 silicon metal, 0.8 – 1 aluminum oxide, 0.8 – 1
ground iron, and heat treatment is performed in gas atmo-
sphere at 1200 – 1300°C for 400 – 450 h.
Bulletin, No. 2, 685 (2009).
METHOD FOR PREPARING FIRED
AND GRAPHITIZED CARBON MATERIAL
B. I. Davydovich, S. V. Polyakov, G. N. Romashina,
V. V. Uleiskii, and V. P. Burtsev
RU Patent 2344101
Method for preparing fired and graphitized carbon mate
rials includes the fact that the press-mix is prepared by mix
ing carbon filler with pitch binder in a mixer with supply of
heat, it is crushed, pressed, the pressed billets are fired, im
pregnated with pitch, fired again, and graphitized. The
method is distinguished by the fact that in the press-mix
there is mixing in a rapid vertical mixer, after which it is
molded in a broaching press, the billet formed is crushed, af
ter crushing the molded billet the ground mass is mixed with
a pitch binder, the components are mixed in a heated hori
zontal mixer with Z-shaped blades and only then pressed.
During the first mixing the press-mix 20 – 25% of binder of
the total amount of the press-mix is added to the charge, and
in the second mixing 2 – 5% of the total amount of binder is
added. The fired and graphitized material obtained has high
physicomechanical properties: apparent density of “green”
billets 1.73 g/cm
, apparent density after graphitizing
, ultimate strength in bending 20.1 MPa.
Bulletin, No. 3, 1176 (2009).
Refractories and Industrial Ceramics Vol. 50, No. 6, 2009
1083-4877/09/5006-0473 © 2009 Springer Science+Business Media, Inc.
OOO Intermet Inzhiniring, Moscow, Russia.
Subsequently we use the abbreviated name Bulletin.