SU401874A1 - VPTBAvtory_P. I. Rum Ncev and A. P. Rum Ncevim. S. M. KirovaFOND zkepertoe - Google Patents

Description

METHOD OF MANUFACTURING AN EASY FILLER

one

This invention relates to a process for the production of lightweight aggregates, for example, expanded clay.

A known method of manufacturing a lightweight aggregate, such as expanded clay, in a rotary kiln by treating the raw material in countercurrent with the products of the flare in the discharge end of the kiln.

In this method, a local center of high temperatures occurs in the swelling zone, which leads to the melting of the upper layers of the granules, while the inner layers do not have time to heat up to the temperature of the swelling. As a result, the quality of the finished product is significantly impaired.

In addition, during flare combustion, the length of the flare should theoretically not be more than five furnace diameters, which limits the further increase in thermal capacity of the furnace.

In the proposed method, these disadvantages are eliminated, for which flue gases with a temperature not lower than the expanded temperature of the expanded clay are additionally supplied from the discharge end of the furnace.

For the implementation of the method, the raw material loaded into the rotary kiln is burned both by the combustion products from the centrifugal burner installed in the furnace and by the thin gases sent to the furnace end through the recoil head from the external combustion chamber installed outside the furnace.

Gases are fed with a temperature not the temperature of expansion of expanded clay.

At the same time, the velocity of the gas flow in the furnace is more than 4 m / s.

The method allows to increase the length of the expansion zone with the optimum temperature, as well as the speed of movement of the gas flow and to increase the productivity of the furnace.

Subject invention

A method for manufacturing lightweight aggregates, such as expanded clay, in a rotating shaft by treating the raw material in countercurrent with the products of flare combustion in the discharge end of the furnace, characterized in that, in order to improve performance, the discharge gases from the discharge end additionally supply flue gases with a temperature not lower than the temperature of swelling} 1and expanded clay.