SU446487A1 - A method of making claydite - Google Patents

Description

one

The invention relates to the production of artificial porous aggregate of expanded clay.

A known method for the production of expanded clay from low-melting weakly pulsing clays by coating the preformed raw granules with a refractory fibrous material, for example, asbestos waste, followed by drying and roasting.

However, with good adhesion of refractory material with raw granules and high granule strength, the bulk density of the obtained granules is quite high.

The purpose of the invention is to reduce the bulk density of expanded clay. This is achieved in that the granules with a layer of fibrous material are impregnated with oil products after drying.

The method is as follows.

The low ludging clay is sequentially dried, crushed and crushed, then moistened to the desired viscosity and molded granules, after which the granules enter another granulator of any design, into which refractory fibrous material is fed, such as asbestos waste, which covers the surface of raw granules. Then the treated granules are fed to the heat unit and heat treatment. After drying, the granules are impregnated with oil products, for

at the beginning of the loading chute, a metal tube with holes is placed in the kiln firing, through which the granules entering the chute are soaked, for example,

by oil. The pellets enter the pipe by gravity from a container installed at a higher level than the pipe, where they are periodically pumped into the pump.

In the burning zone, oil and oil products under

exposure to atmospheric oxygen is burned to form CO, CO2, H2 and H3O. These gases create a reducing atmosphere around the pellet. The refractory fibrous material provides strong adhesion of the coating to

granule, slows down the combustion of oil and petroleum products, contributes to partial coking at the beginning of the thermal preparation, as a result of which the local reducing atmosphere around the granules remains almost

the very moment of expansion, which makes it possible to obtain high-quality lightweight expanded clay from poorly and moderately penetrating clay rocks, with lightweight expanded clay gravel, with a bulk density of 0.60 g / cm in a piece.

Subject invention

A method of making claydite from low-melting low-melting clays by means of katyat of refractory fibrous preformed raw granules 34

material, for example, asbestos waste, with a bulk of claydite, granules with a layer of subsequent drying and roasting; M, a distinctive fibrous material after drying, is prickly, in order to reduce it with oil products.

446487