SU834380A1 - Electrocorund-production furnace lining seam filler - Google Patents

Description

The invention relates to metallurgy, in particular, to the selection of materials for the lining of furnaces for the production of electro-corundum. The use of magnesite powders as a spillage between layers of fl bricks is known. A disadvantage of using magnesite powders is a decrease in the thermal conductivity of the lining due to the high porosity and low thermal conductivity of the powder layer. As a result, at high specific power of the furnace on the internal walls of the furnace, there are no conditions for garnissing, and the resulting liquid superfluous alloy and slag shine through the pores of the lining, which leads to its destruction. The purpose of the invention is to increase the thermal conductivity of the masonry and durability of the furnace lining. This goal is achieved by using aluminum powder for squeezing seams in the lining of the furnace for the production of electrocorundum. The use of powder and aluminum for splicing the seams between the layers of refractory materials, such as magnesite bricks, allows for heating the masonry at the beginning of operation of the furnace to increase the thermal conductivity of the most heated lining areas by melting aluminum and filling the space between the bricks with it. The increase in thermal conductivity leads to the early formation of garnissage and the protection of the inner surface of bricks from the effects of the alloy and liquid slag. On industrial Aechi for smelting a normal electrolyte sorunde during a capitally repaired by the proposed method, a section of the sidewall walls of the furnace bath was fughed. The masonry, with a total area of 9 m, was carried out with magnesite non-encrusted PCR brand MP-91 with npocbtnKcrfl welds with aluminum powder. During the operation of the furnace, the following measurements are made at the pilot and

Coagrolistic masonry lining: measurement of heat flow and measurement of fluctuations in the thickness of the garkissage.

At the end of the exploitation period of the furnace and stopping through 2 g of the furnace for repair

The condition of the test and control sections of the masonry was carried out with the determination of the degree of wear of the lining.

The results of the observation are tabulated.

3.7 - 4.1

300 - 700

No masonry damage.

and masonry is suitable for further operation

As can be seen from the table, the experimental section of the masonry is better cooled (increased heat flux from the surface of the lining masonry), garnissage is always kept on it, as a result of which the lining is not melted and dissolved into the melt,

At the end of the service life, the lining is without any damage and suitable for further (her work.

The use of aluminum powder for sprinkling the joints of the furnace lining ensures the presence of garnish on the inner surface of the masonry and ensures its safety for an unlimited time. Thus, the term of a penny repair is determined not by the condition of the furnace lining, but by other factors; eg.

2, 3 - 2.7

O - 500

Destroyed (melted) 50% masonry thickness

the degree of mechanical operation of the furnace.

The expected annual economic effect from the use of the proposed method for a fosterka per kiln is 33.0 thousand rubles. ;

Claims (1)

Invention Formula The use of aluminum powder for spillage seams in the lining of the furnace for the production of electrocorundum. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 551492, cl. F 271 1/00, 1976.