Chemical and mineralogical properties research of clay from the Republic of Karakalpakstan - as raw materials for Portland cement production

Abstract

In the Republic of Karakalpakstan, there are large reserves of unprocessed mineral building materials, which necessitate the development and targeted support of building materials manufacturing industries, which may become one of the engines of economic growth, further modernization, and diversification of the region’s industry. This article examined the chemical and mineralogical composition of technological samples of the clay component of the North Jamansay deposit. The results of determining the mineralogical composition of the averaged technological sample of clay from the Dzhamansay deposit are in good agreement with the data of chemical analysis. The heating curve of the averaged clay sample of the Dzhamansaysky deposit is marked by fourteen endothermic effects. The total weight reduction in the temperature range (60–900) °C according to the thermogravimetric curve is 9.53%. On the DTA curves of the clay of the Dzhamansayskoye deposit, endo effects associated with absorbed and ciolet water were identified, as well as endo effects corresponding to the gradual removal of constitutional water from the clay component, accompanied by destruction of the crystal lattice. Electron microscopic analysis of clay showed that the presence of particles of various sizes having a surface with rhombohedral protrusions. This can be seen both on the chips and on the surface of the particles, where rhombohedral protrusions characteristic of quartz are reflected. The chemical composition of the technological sample of the clay component of the North Jamansay field in terms of the content of regulated oxides (SiO2 = 62.64; Al2O3 = 17.54; MgO = 2.00; SO3 = 1.21; TiO2 = 0.46; P2O5 = 0, 25; R2O = 3.68)% meets the requirements of O’z DSt 2950: 2015 for the chemical composition of aluminosilicate (clay) raw materials used in the production of Portland cement clinker.