SU1330100A1 - Binder for refractory concrete - Google Patents

Abstract

The invention relates to the composition of a concrete for refractory concrete and can be used in the manufacture of linings of thermal units with an operating temperature of 1-150-1350 ° C. The purpose of the invention is to increase the temperature of the onset of deformation under load and increase strength. In the grip for heat-resistant concrete contains, wt%: chamotte 11-18, silicate lump 8-14, alumina 16.2-28.0, chromium oxide 3.8-10.0, dunite 10-20, perlite the rest . Durability in compressive at 1250 C to 93 MPa, the temperature of the onset of deformation of the concrete under load up to. 1 tab. (L 00 co

Description

one

The invention relates to a composition in a binder for heat-resistant concrete and can be used in the manufacture of linings of thermal units with an operating temperature of 150-1350 C.

The purpose of the invention is to increase the temperature of the onset of deformation under load and increase strength.

An example, A prepared is prepared by the proposed, on the open, compounds 5,

joint grinding of constituents. In the manufacture of concrete, the sheeting is combined with a refractory filler, shuttered with water at

water-solid relation, which provides 15 tests of products, a cone draft of 1-2 cm, which is based on the invention, is 1-2 cm. The products are molded and autoclaved according to the mode of 1.5 + 6 + + 1.5 h at a pressure of 1 MPa.

Claims (1)

The following raw materials are used as raw materials: perlite with a specific 20 Formula of the invention - a surface of 4000 cm / g, chamotte marimets higher strength and temperature of the onset of deformation under load. ki 3 Zh with a specific surface of 4000 cm / g, silicate block with a silicate module 3.1, with a specific surface of alumina, with a specific surface of 3500, chromium oxide and a dunite with a surface of 4000 cm / g, When making samples in a dry mixed mixture, the shutter is shut at a water-to-hard ratio of 0.4. In the preparation of samples of concrete, the dry into the hedge and aggregate - fractionated chamotte, taken at a ratio of 1: 4, is closed with water with a live ratio of 0.5. Chamotte aggregate is used with the following fractional composition: fraction 10-20 mm - 25.5%, fraction 5-10 mm - Perlite Fireclay Silicate cob Alumina Chromium oxide Duiit Soluble glass Technical alumina 301002 43.0%. the fraction 2.5-5 mm - 25%, the fraction 1-2.5 mm - 4%, the fraction 0.5-1 mm - 1% and the fraction 0.5 mm - 1.5%. The table shows the compositions of the mixtures and the results of their tests, where the compositions 1, 9, 8, 10, 11, 12 - the properties are given for dwellers, the compositions 2, 3, 4, 5, 6, 7 - the properties for the concrete mix 6, 11, 12 are given to confirm the optimality of the selected ratio of components. As can be seen from the above test results, the inventive according to the invention has higher strength and temperature of onset of deformation under load. It is suitable for heat-resistant concretes, including perlite, fireclay, alumina and alkaline component, which is due to the fact that, in order to increase the temperature of the onset of deformation under load and increase in strength, it contains and up- Chrome oxide and dunite in the following ratio of components, wt.%: five Fireclay Alumina Silicate cob Chromium oxide Dunite Perlite 1 1-18 16.2-28.0 8-14 3.8-10.0 10-20 Else 6.7 6.7 33.3 33.3 10 - 7.5 9.2 8.7 6.5 7.1 7 after ob-higa at 1250 С 11.6 9.6 10.7 9.7 8.2 8.7 -, 9 7.9 12.9 13.2 8.9 8.1 83.0 68.7 71.0 69.0 55.5 62.0 60.7 81.2 90.5 93.1 90.8 80.1 86.2 85.0 50 52 49 54 48 50 30 30 30 31 30 30 nations under load 0.2 MPa,. - 1390 1370 1340 1380 1300 1290 Table continuation 6.8 9.7 10.3 7.7 7.5 71.2 81 82.5 75.4 72.0 61.5 82.3 81.0 68.0 63.3 e