SU511309A2 - The method of obtaining claydite - Google Patents

Description

one

This invention relates to a process for the production of porous aggregates.

Basically auth. St. № 435 2О9 described the method of obtaining expanded clay, including the formation of raw granules, processing

their aqueous solution of phosphate and subsequent calcination.

The disadvantage of this method zaklk. {It is in reducing the interval of intumescent and reducing the strength of expanded clay.

The purpose of the invention is to increase the strength of claydite and reduce the stickiness of the granules during firing.

3i-o is achieved by introducing into the aqueous phosphate solution

refractory powder.

Increasing the strength of claydite is achieved by creating a protective shell on the granules as a result of processing them before firing with a refractory suspension.

material, for example, kaolin B phosphate solution (diammonium phosphate or others). The solution of diammonium phosphate diffuses into the surface layer of grains, increasing the adhesion of the refractory powder to it and

Provides uniform distribution

its on the surface of the granules. : I Caused by phosphate solutions: the effect of accelerating the formation of a vitrified granule shell is inhibited by the applied I simultaneously refractory powder. I Last as a finely dispersed filler I is absorbed by this shell, strengthened by gravity I at the same time preventing spv 1 singing of the granules.

The method is carried out as follows.

i3OM.

On the surface of the granules made; According to one of the known methods, nano-t spraying or spraying a suspension consisting of finely ground clay powder (dispersed phase) and masses of mineral oil (uni-fosfat 2O-30-percent concentration). The ratio of components in the suspension is 1: 5. A conventional stirred tank is used to make a suspension. Excess suspension from the granules is returned to eNmocTb for re-use1, calling. Drying, heat-treating, burning and cooling the granules are carried out using conventional technology HsiepeTeHBa%, H 3 j tioq96 "And ° ev- №435209, about t l ichayushi so that With increasing -n shall water to chn1h; ti kgrpmzita and umonyieni slipaomosti r {) Anulov during firing, in an aqueous solution phos. veil is preliminarily introduced with a refractory powder.