RU1790566C - Silica brick masonry mortar - Google Patents

Abstract

Usage: for bonding the masonry of the lower structure of coke ovens. SUMMARY OF THE INVENTION: masonry mortar includes, wt.%: Quartzite 39-53; Dinas fight 27 - 28; refractory clay 6-10; sodium tetraborate 2-5; water is the rest. Characteristic: spreadability 105.3 - 106 mm; joint thickness 3.5 - 4.5; open porosity of the weld after firing at 1200 ° C from 31.3 to 32.0%. 2 tab.

Description

The invention relates to a refractory subindustry, in particular to compositions of masonry mortars for bonding masonry of the lower structure of coke ovens.

Known dinas mortar containing, wt.%:

Quartzite60 Dinas battle. 22 Refractory clay 8 Soda 0.10-0.15 Plasticizer

LBF: 0.10-0.2. The disadvantage of this mortar is its poor masonry properties - the high flowability of the masonry mortar prepared from it (130 mm), resulting in many empty joints. The sintering strength of dinas masonry when using the indicated mortar in the lower structure of the coke oven is very low.

The closest in technical solution and the achieved result is

masonry mortar containing dinas mortar, wt.%:

Quartzite 40-55 Dinas battle 18-28. Fireproof

clay 6-10 Soda ash 0.1-0.2 Water 16 - 24 Aqueous solution of aluminum sulfate of 4 - 6% concentration of 0.9 - 2.8

The disadvantage of this masonry mortar is the low sintering strength of the dinas masonry of the lower structure of the coke oven (0 - 1,030 N / mm2), the service temperature of which is 800-1200 ° C. The purpose of the invention is to provide a more durable sintering of dinas masonry while maintaining the necessary masonry properties.

This goal is achieved in that the masonry mortar of dinas mortar for

Yo

Xi

Yu Oh

ate about

ON

 With

masonry of the lower structure of coke ovens, including quartzite, dinas battle, refractory clay, additive and water, according to the invention as an additive contains sodium tetraborate in the following ratio, May.%:

Quartzite 39-53 Dinas battle 17-28 -, Refractory clay 6-10 I. Sodium tetraborate. 2-5 -:. Wbda ... .......... Else

According to this composition and prototype masonry mortars were made. In the preparation of the masonry solution of dinas mortar, it was carried out in a screw mixer, a pre-prepared powder consisting of quartzite, dinas bo, refractory clay and sodium tetraborate was added thereto. At the same time, the mixer was fed

0

5

0

water, for composition 1 (prototype) - aluminum sulfate solution of 5-6% concentration. Mixing lasts 15 to 20 minutes.

The sintering strength was characterized by the shear strength of samples of tiles 38 x 38 x 12 mm in size, cut from D-2 brand Dynas brick (GOST 4157-79) and bound with mortar. The thickness of the layer died between the tiles was 5 mm. The tiles were offset 5 mm from one another. The tiles were fired at 800, 1150, and 1200 ° C. Masonry properties were determined according to the procedure described in TU 14-8-569-88. The change in linear dimensions and open porosity were determined on samples obtained by casting.

The test results of solutions of dinas mortar are given in tables 1 and 2.

Formulas a-invention.

The masonry mortar of dinas mortar for laying the lower structure of coke ovens, including quartzite, dynas battle, refractory clay, additive and water, characterized in that, in order to provide more durable sintering of the dynas masonry while maintaining the necessary masonry

properties, it as an additive contains sodium tetraborate in the following ratio of components, wt.%:

Quartzite 39-53 Dinas battle 17-28 Refractory clay 6-10 Sodium tetraborate 2-5 Water Else

Table 1

table 2

Note: The + sign indicates an increase in linear dimensions. A sign indicates a decrease in linear dimensions.

Continuation of Table 2