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The possibility of using mining waste in the form of magnesium silicate rocks - troctolites in the production of building ceramics has been studied. It was found that the introduction of troctolite into the charge helps to reduce the fire shrinkage and water absorption of ceramic samples. It is shown that in the process of firing a new structure of the ceramic material is formed, which determines the physical and mechanical properties of the obtained materials.
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Non-firing and firing high-silica composite materials for construction purposes based on quartz sand and blast-furnace slag, which are characterized by increased strength and durability, high density, abrasion resistance, and frost resistance, have been developed. They are technologically advanced, environmentally friendly, their production can be realized on an extensive base of raw materials with a minimum of energy costs. The technological and operational properties of the obtained materials have been studied, the areas of their application have been recommended.
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On the basis of liquid glass modified with sodium chloride and salt waste of aluminum production, a heat-insulating material was obtained without the use of natural traditional materials. The presence of isometric and oval pores in the test samples gives them mechanical strength. The X-ray phase composition showed the presence of mullite and anorthite in the samples, which provide strength to heat-insulating materials. The formation of mullite is facilitated by an increased content of alkalis and iron, which reduce the temperature of its crystallization to 1100 ° C
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The processes occurring during the formation of hollow microspheres based on ash and slag waste from thermal power plants of the Kemerovo region in a thermal plasma flow are considered. The results of physical and chemical studies (scanning electron microscopy, energy dispersive X-ray and infrared spectroscopy) of the raw material and the resulting microspheres on its basis are presented. A comparative analysis of hollow microspheres obtained by the traditional method in chamber furnaces of thermal power plants of the Kemerovo region and microspheres obtained using thermal plasma has been carried out.
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The physicochemical processes of the formation of the cellular structure of heat-insulating building glass materials as a result of thermoplastic sintering of the charge at a temperature of 600? 870? C. The implementation of such a process for the formation of cellular glass is ensured by the fact that the formed significant volume of the gas phase at a reduced viscosity, diffusing in the thermoplastic glass mass, creates a porous structure of cellular heat-insulating glass
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Heat-insulating ceramic materials were obtained on the basis of coal preparation waste: flotation waste of coal preparation of GOF "Tomusinskaya", slimes of flotation coal preparation (coal slimes of the Central Processing Plant "Obukhovskaya"), waste of coal preparation of Abashevskaya Central Processing Plant and waste of coal preparation of "Korkinsky open-pit mine" using traditional materials It is shown that anorthite, cristobalite and hematite are formed at a firing temperature of heat-insulating materials of 1000 ° C. Heat-insulating brick of grades A and B received
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Hits: 15361
Glass-ceramic material was obtained from the "tailings" of concentration of lead-zinc ores. The strength of the control samples was 22.26 MPa in bending and 90.22 MPa in compression. After 100 cycles of testing samples for frost resistance, the characteristics changed to values ??equal to 9.61 MPa in bending and 35.30 MPa in compression.
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The results of experimental studies on the production of foam glass-crystalline materials based on technogenic raw materials using the technology of low-temperature synthesis of glass granulate are presented. The latter is an intermediate product of the formation of a vitreous mass during heat treatment of technogenic raw materials (slags, TPP ash) and corrective additives. Does the subsequent foaming of glass granulate produce an insulating material? foam glass crystallite
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Analysis of experimental data obtained by diffuse small-angle X-ray scattering (SMX) shows that wollastonite in ceramic facing tiles, although it increases the total number of pores in size in the range from 10
-5 to 10
-4 m, but at the same time ensures the homogeneity of the microstructure of ceramic materials
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Compositions of ceramic masses for the production of clinker products based on unenriched kaolin and nanotechnogenic raw materials in the form of alkaline etching sludge of aluminum and its alloys of the Samara Metallurgical Plant have been developed. Clinker ceramic products have been developed that differ from other ceramic materials in higher mechanical strength and other physical and mechanical indicators.
