At present, there is a trend towards increasing demand for ceramic products with enhanced physical and mechanical properties. This study is aimed at developing scientifically grounded compositions of ceramic products that maximize the use of local low-quality aluminosilicate raw materials and secondary raw materials in brick-making technology. Characteristics of local low-melting clays and industrial waste in the form of drilling slurry with minimum percentage of petroleum product were studied and presented in this paper. Standard methods for determining physical and mechanical properties of bricks, physicochemical and statistical methods of research are used as a methodological framework. The paper shows effects of drilling slurry with an increased content of calcium oxide on the composition, physical and mechanical properties of wall ceramics, as well as effects of composition of low-quality local clays and slurries on the structure and properties of ceramic materials. The modifying role of container glass and its effects on properties of a synthesized ceramic piece were studied and presented.
This paper discusses the properties of ceramic bricks produced on the basis of the raw material base of the Orenburg region, namely, waste generated during the development of brown coal from the Tyulgansk deposit - white and red clays and nickel slag of JSC Southern Urals Nickel plant of the Orenburg region. Man-made products, namely dumps of nickel slags of non-ferrous metallurgy, is a serious problem from the point of view of environmental pollution, therefore the disposal of this type of waste is relevant. One of the directions of disposal of these wastes is their use as an additive in the manufacture of ceramic products. The study presents data from the study of the technological properties of the raw materials, the development of the composition of the ceramic mixture. The influence of the material composition of the clay / slag mixture on the compressive strength, fire shrinkage, water absorption and density of experimental samples - bricks after calcination at a temperature of 1000 ° C is determined.
The paper presents the fundamental possibility of using ash and slag waste (ASW) of the fuel and energy complex in the production of ceramic bricks using the semi-dry pressing method based on the Buguruslan deposit low-melting aluminosilicate loams. The technological parameters optimization ways (molding moisture, grinding fineness, pressing pressure) in the production of ceramic bricks from low-quality clay raw materials using the experiment mathematical planning method are presented. The separate and joint grinding raw materials mixture rational composition influence on the ceramics technological properties is studied.
The paper considers possibility of using low-melting loam, drilling waste and ash and slag waste of thermal power plants in the production of wall ceramics by the method of semi-dry pressing. The physicochemical processes occurring upon receipt of ceramic materials using production waste at the firing stage are studied. It has been established that an increase in the duration of grinding of calcium-containing raw materials at the stage of preparation of the starting materials determines a change in its particle size distribution, an improvement in the plasticity of the molding materials and an increase in the coherence of the raw product and provides an increase in the mechanical strength of the raw product in comparison with the initial indicators.
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