SU39295A1 - Method for making refractory putty - Google Patents

Description

The present invention relates to a method for making refractory putty.

In the process of exploitation of coke ovens, more or less violations of the masonry of the coke oven chambers, in the form of opening of seams, gouging, etc., are inevitable. . At the same time, by timely and thorough correction of damaged areas, these defects in work can be eliminated even without stopping the cameras for a long time. In order to repair the coking chambers in hot water, various refractory putties are used. The requirements for such putties are summarized as follows: 1) good ductility, allowing to fill seams and grooves; 2} tight adhesion to the material of the refractory masonry immediately after applying the putty, 3) sufficient density of the structure at different temperatures; 4) no significant shrinkage, leading to cracking and rebounding; 5) refractoriness sufficient for given working conditions.

In order to obtain a putty that meets the above requirements, the author has studied a number of mixtures of various quartz materials, refractory clays.

soluble glass, as well as various additives-flux. The fluids are those additives, which in a small amount should give the necessary activity at the time of application, but at the same time, not too low the refractoriness and not worsen the structure of the crock.

The author of the present invention has found that, to obtain a refractory putty, to the crushed mixture of quartzite and clay, before adding soluble glass, it is necessary to add as a smooth waste, obtained by extracting alumina from alumina by soda lime process. Waste has approximately the following status:

Si Oo: 25,

11.08 ,,

I,

CaO31.89 „

0-43 „

MDO 20.13 „

Loss on ignition 10.47

Alkalis

 100 Introduction to the putty of the above waste dramatically increases the ability of putty to molesting and gives the shard a dense structure.

In the process of studying the methods of preparing putty for hot repairs, the author found out that the method of preparation is very strong. reflects on the quality of the putty both in terms of the density obtained at high

the temperature of the shard, and the degree of adhesion with the repaired material. Rapid kneading with soluble glass and water before applying the putty (which is necessary, as the putty sets on standing) cannot provide a fine distribution of clay on the surface of quartzite grains, which adversely affects the behavior of the putty in the work. To eliminate the above disadvantage, the following method of mass preparation should be applied. The pre-ground and dry-mixed ground components are moistened with water and thoroughly processed under the runners or on clay soil, after which the resulting mass is cut into thin batches. The latter are dried, crushed and sieved (no residue). In the resulting powder, the clay appears to be evenly distributed on the surface of quartzitic grains. Due to this, the powder obtained in the above way, immediately after mixing with soluble glass, acquires the properties of fast compaction and good adhesion during

using it for spreading hot walls.

Example. The powder consisting of 82 parts of soft cement quartzite, 15 parts of clay (Hours-Yarskaya) and 3 parts of waste from the extraction of alumina is crushed to pass through a sieve of 900 holes per 1 CAi. Before use, a soluble glass batch is added to the powder with stirring until alkalinity is B 1.8, about 100 parts of dry matter and water are used to make the putty of the required consistency. The resulting putty can also be applied to other types of furnace installations, if the conditions of their operation are not too different from those of coke ovens.

The subject matter of the invention.

A method of manufacturing a refractory putty for repairing coke ovens on the go, characterized in that the crushed mixture of quartzite and clay before the addition of soluble glass is added to the waste from the extraction of aluminum oxide from kaolin by the soda-lime process.