Abstract
The goal of the research was to obtain competitive refractory products, the use of which would be budgetary. To achieve this goal, we used mixtures prepared with the addition of sand and brick dust to dolomite. We planned to obtain highly refractory clinker from them. A comparative study of dolomites, sands, and magnesite brick slags was conducted to determine their suitability for producing highly refractory clinker. The research was conducted using chemical, thermal, X- ray structural, petrographic, and micro-X-ray spectral analysis methods. A composite of dolomite-sand- magnesite brick slags using a carbon additive and a binder was investigated for its impact on the physical and technical properties of the composite. This shows that the main components of the composite are minerals in the form of MgO-periclase and tricalcium silicate-alite. Electron microscopic images of the DN-8 composite show a well-burnt surface of the sample, on which the formed crystals of the main phases contained in the clinker stand out. Namely, periclase and alite, although very small inclusions of belite are also observed. In addition, a plasticizer of complex action is introduced into the charge, on the basis of which it is established that on the basis of dolomite-sand- magnesite brick slags clinker, it is possible to obtain a highly fire-resistant carbon-containing composite with high physical and technical indicators.