SU1599343A1 - Refractory composition - Google Patents

Abstract

The invention relates to building materials and can be used for lining work on thermal units. In order to increase the heat resistance of refractory products, the mass contains the following components, wt%: alumoborosphosphate bond 8-20

sand casting molds 15-32

red brick waste 5-15

chamotte rest. Chamotte scrap can be introduced as fireclay. Heat resistance K _T = 0,82-0,85. 1 tab.

Description

The invention relates to building materials and can be used for lining work on thermal units.

The aim of the invention is to increase the heat resistance of refractory products ..

Sand casting waste is a bulk material obtained by crushing waste molds for iron casting, and has the following chemical composition, in wt.%:

Silica 95.5-96, -5

Alkali oxides

Metals1.9-2.0

Iron oxides 0,8-0,9

ppt . 1.5-2.0

Silicon oxide is presented in the form of c-quartz c / and / 5-cristobalite.

Aluminoborphosphate bond ABPS. (TU 113-08-10-17-84) is a liquid phosphate binder with a density of 1.5 g / cm.

Chamotte scrap of the LSR brand (TU 14g8-173-75), which is used in the mass as chamotte, is crushed chamotte refractory stone scrap.

To obtain the refractory mass, 230 g (23 wt.%) Of sand casting molds sifted are weighed. Through a sieve with a mesh size of 1.6 mm, 100 g (10 wt.%) Of the red brick production waste of fraction D-1, 6 mm and 530 g (53 wt.%) Scrap fireclay products fraction 0-1.6 and mix. , To the mixture obtained, 140 g (14 wt.%) Of ABPS was added and mixed again. Samples were prepared from the obtained mixture using the semi-dry press method or at a specific pressure of 10 Sha with a surcharge: for 15 seconds. Molded specimens are dried for 1 hour and burned for 2 hours at a final temperature. The temperature rise rate during firing is

ate

with

; About CO 4 Au

Pat 7-8 ° C / s. Sample cooling Slow with oven. A heat resistance coefficient was introduced for the characteristic heat resistance, which is equal to the ratio of the residual strength (R after thermal shock) after five heat cycles To the initial strength (R.jt initial). The composition of the mass and its own material obtained from them in comparison with the prototype are presented in the table.

forms, ula invention

I 1. The refractory mass, including humophosphate, zamytsey, fireclay and bends of crocodile brick production is consistent with the fact that

for the purpose of the use of heat-resistant refractory products, it contains c. as aluminophosphate binder, aluminoborphosphate binder and additionally waste sands of casting molds in the following ratio of components, wt%:

Alumina-phosphate bond 8-20 Waste from the production of red brick 5-15 Waste from sand casting molds 15-32 Shamot Else 2. The refractory mass of claim 1, characterized in that it contains chamotte in the form of chamotte scrap.

The mixture of the prototype contains, in bulk.%: Aluminum chromophosphate binder 38; red brick waste 5; aluminosilicate mortar containing chamotte 57 ..

Claims (2)

Claim 1. Refractory mass, including 45 Aluminophosphate binder, fireclay and red brick waste; characterized in that, in order to increase the heat resistance of refractory products, it contains c. as an aluminophosphate binder, an aluminoborophosphate binder and additionally waste sand casting molds in the following ratio of components, wt.%: Aluminoborphosphate ligament 8-20 Red Brick Production Wastes Sand Casting Wastes Fireclay 2. Refractory mass 5-15 15-32 The rest according to claim 1, characterized. in that it contains chamotte in the form of scrap of chamotte products. ! Experience The content of components in the mixture, wt.% Heat resistance coefficient. Alumoborophosphate Ligament Sand Casting Waste Red Brick Waste Scrap chamotte. ny products ! 1 14 23 10 53 0.85 2 8 fifteen 5 72 0.84 thirteen 20 32 fifteen 33 0.82 ) (proto ^ ] a type) - ·. - 0.58 The prototype mixture contains, wt.%: Aluminochromophosphite binder 38; red brick production waste 5; aluminosilicate mortar containing fireclay 57.