SU945142A1 - Batch for preparing refractories - Google Patents

Description

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The invention relates to the refractory industry and can be used for the manufacture of piece refractory products, concrete, gunning mixtures.

The known charge for the manufacture of refractories, including, wt%: corundum fraction 0, mm, silicon carbide fraction less than O, About mm 15-30; 2G technical alumina fraction less than 0, mm 13-21; ethyl silicate 10-12 1.

The known charge for the manufacture of refractories composition, wt.%: Electrocorundum fraction 160-200 microns 30-ZbG electrocorundum fraction 800-1000 microns 27-32; alumochromophosphate bond 8-9; alumina 25-35 G2.

The disadvantage of the data (the charge is low resistance in the molten sulfur salts.

Closest to the invention is a mixture for the manufacture of refractory materials, including, wt.%: Technical grained corundum alumina 10-20; phosphate binder k-} 6 finely ground magnesite 8-20 f3j.

A disadvantage of the known charge is the low resistance in molten sulfur salts.

The aim of the invention is to increase the stability in molten sulfur salts.

This goal is achieved by the fact that the charge for the manufacture of refractories, including granular corundum, fine high alumina component and phosphate binder, additionally contains silicon carbide fraction O, 080, 63 mm in the following ratio of these components, wt.%

20 Fine high-alumina component, 25-30 Phosphate binder 1-9 Silicon carbide fraction 0.08-0.63 mm Granular corundum Else The mixture contains fine ground aluminous component of the fraction 0.063-0.08 mm with a content of 0 71-99.5 May in it D. Chichtu is prepared as follows. Mix the original components in the specified amounts. From the mixture obtained, the products are pressed, dried at 80-105 s, fired at UOO-iyOO C. Example 1. 51 May. granular elektrokorunda, 30 wt.% corundum fraction of 0.063-0.08 mm, 9 wt. an aluminochromophosphate bond and a 10 me.car bide of a silicon fraction of 0.08-0.63 mm are mixed. The mixture is ready for use. Pr-m e R 2. “U wt.% Granular corundum chamotte, 25 May. slag aluminothermic production, containing up to 83 oi fraction 0,063-0.08 mm, 6 wt. phosphoric acid and 20 wt.% silicon carbide fraction 0.08-0.63 mm mixed. The mixture is ready for use. Example 3. 29 wt. granular lamellar corundum, 30 wt. | petrochemical production catalyst waste (containing, wt .: 0 / - AliO ,, 13-16; SiOa.7-10; 0.6-1.0; 1.82, 5), 1 May. I sodium polyfluate, ifO May silicon carbide fraction 0.08-0.63 mm mix. The mixture is ready for use. Samples are made from the prepared charges according to the indicated technology. The properties of the samples obtained from the proposed and known charge are shown in the table,

Porosity

apparent,%

Strength limit

at the heels of

kge / eat

Settle in raplav

black salt,

h

As can be seen from the table, the samples made from the proposed charge have a higher resistance to heat in the ebony eole efluenza than the samples from the known charge.

Claims (2)

1. A mixture for the manufacture of refractory materials, including granulated corundum, fine ground alumina component and a phosphate component, which is so important that, in order to increase the stability in the heat transfer salts of the black salt, it additionally contains silicon carbide fraction 0.0811.5 19-20 700-800 1300 89 102 ten 0.63 mm at the following ratio of the indicated components, May.%: Fine ground mineralized component 25-30 Phoephate one to one1-9 Silicon carbide fraction 0.08-0.63 mm 10-40 Corundum 2. The mixture in accordance with claim 1, that is, in that it contains fine ground high alumina component of the fraction 0.063-0.08 mm with an oL content of 71-99.5 mas. 5g siifZ6 Sources of information, 2. USSR authorship taken into account in examination No. J 6l077, cl. SOA on 29/02, 1975. 1. USSR author's certificate3. USSR authorship No. C O B 35/10, 1978., cl. CO In 35/18, 1970.