The article deals with the problem of determining the energy for the cement production materials destruction. It is shown that the destruction of various materials consumes a significant amount of energy. One of the most energy-intensive building materials is cement. The method of energy calculation for the cement production materials grinding on the cement clinker example is proposed. The grinding cement clinker process and additives is described on the basis of the thermodynamic method. The assumptions are made under which the destruction of the cement clinker occurs under the influence of external forces. The change in the volume of the crushed material due to the increase in energy in the original volume is shown. The expression for the elementary work on the cement clinker particles destruction is proposed. The expression for determining the total work on grinding the particle of cement clinker depending on its size, generalized thermodynamic force and elastic modulus of the crushed material is obtained.
Building materials production generates a large amount of harmful substances poisoning the atmosphere. One of the major sources polluting cities environment is metallurgical industry. Concentration is one of the most important processes where empty components are extracted from the rock. During ore concentration, an increasing number of manmade wastes are generated; they pollute the air and huge area around the factories discharging these wastes. This reduces both space for people to live and place for cities to function and develop. It should be noted that metal production enterprises have accumulated billions of tons of industrial wastes (tailings) that include a large amount of iron-containing materials and rocks; these can be used as building materials, for example, when preparing fine-grained concrete as a mineral powder as well as in construction of roads, houses, in paint production, etc.
The proposed method is a dry separation tailings. A separator developed for separating the tailings of the quartz sand and iron-bearing components. The efficiency of separation of enrichment tails in the fluidized bed separator is shown. The use of mill tailings as components in the manufacture of building materials is practically confirmed by testing samples of fine-grained concrete and asphalt.
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