THE USE OF TECHNOGENIC METALLURGICAL RAW MATERIALS FOR THE PRODUCTION OF CERAMIC MATERIALS WITH AN ANORTHITE PHASE

Studies have been carried out on the topic of obtaining ceramic materials for construction purposes with an anorthite phase. Clay and blast-furnace gas cleaning sludge were used as raw materials. The chemical compositions of raw materials for their use in the production of ceramic products have been studied. The calcium- and iron-containing compounds included in the composition of the gas cleaning sludge contribute to a decrease in the temperature of the formation of solid solutions and the anorthite phase. It has been established that with the addition of sludge up to 80 wt.% into the composition of the ceramic mixture increases the likelihood of an anorthite phase formation. The physico-mechanical parameters of the obtained ceramic samples have been studied. It has been established that the amount of gas cleaning sludge in the composition of the charge is 10 – 40 wt.% allows to obtain products with compressive strength 18 % higher than the control sample. The improvement in physical and mechanical properties is associated with an increase in the amount of the formed anorthite phase, which is confirmed by the data of X-ray phase analysis.