Results are provided for determination of the abrasion resistance of refractory concretes of different composition according to the standard ASTM C-704. Principles are considered for constructing abrasion-resistant linings in order to protect heating units in various branches of industry.Refractory lining of heating units in different branches of industry is subject to abrasive wear. The problem of protecting equipment from the action of high temperature and simultaneously abrasive wear of moving dust, granular, and lump materials exists in ferrous and non-ferrous metallurgy (the blast furnace process, coke-oven batteries, various roasting and melting furnaces, etc.), in the cement industry, in power engineering using solid fuel, in the oil processing, petrochemical, and chemical industries (in various catalytic processes), in rubbish incineration units, etc.OOO Aliter-Aksi specializes in preparing refractory concretes that exhibit high abrasion resistance using about 50 designated raw materials, producing about ten thousand tons per year of refractory concrete mixtures and articles (Al 2 O 3 up to 99%) with a very broad range of properties: application temperature up to 1800°C, apparent density from 0.4 to 3.1 g/cm 3 , ultimate strength in compression up to 250 MPa. During the last thirty years rRefractory concretes have actively crowded out traditionally formed refractories in different branches of industry. On the whole in developed countries the volume of production of formed and unformed refractories is approximately the same; in some branches concretes are used more than formed articles. The advantages of concrete linings compared with those made of individual items are well known: the technological efficiency of laying and assembly, absence of numerous joints, low labor expenditure in laying, and the repair capacity of linings. However, there are factors holding back the spread of concrete linings: the necessity of maintaining a positive temperature during preparation of the concrete and performing lining work, use of additional equipment (mixers, torcrete guns, vibrators, pneumatic rams, etc.), use in the work of qualified personnel, higher requirements for drying and the first firing of the lining.Presented in Table 1 and in Fig. 1 are the properties of abrasion-resistant concretes produced by OOO Aliter-Aksi. The abrasion resistance was determined according to the standard ASTM C-704 in the research center of the firm Causeway Steel Products Ltd (Great Britain) according to the volume of the crater formed during action on a specimen of a jet of silicon carbide powder. The smaller the crater volume, the higher the concrete abrasion resistance. Abrasion resistance less than 12 cm 3 is assumed to be very high, and less than 6 cm 3 it is assumed to be extremely high.Abrasion-resistant concretes produced by OOO AliterAksi may be broken down into three main groups:· ALKOR is a mixture of dense aluminosilicate fillers (from fireclay to corundum) with alumina or high-alumina cement. The cement content is more t...
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