Use of ilmenite ore enrichment wastes in the production of Portland cement clinker

Abstract

We presented the results of the research on the influence of d-elements of ilmenite ore beneficiation wastes of the Vilnohirsk Mining and Metallurgical Plant on the structure and properties of Portland cement clinker minerals, firing properties and their hydraulic activity. It was established that the use of the enrichment wastes as an aluminosilicate component of the raw material mixture for clinker firing contributes to the reduction of the consumption of blast furnace granulated slag, simultaneously increasing the consumption of limestone. The presence of compounds of d-elements contained in the wastes of enrichment of ilmenite ore in the proposed raw material mixture for obtaining Portland cement clinker increases the saturation coefficient up to 99% and improves the processes of decarbonization and sintering during clinker firing. The physical-mechanical characteristics of the developed cements, in particular the compressive strength limit indicators, are not inferior to those produced according to the classical formulation. Cements obtained on the basis of clinkers, according to their properties, correspond to type II cements (state standard DSTU B.V. 2.7-46:2010). Partial replacement of the clay component in the raw material mixture by ilmenite ore enrichment wastes allows significantly expanding the raw material base for the production of Portland cement clinker and effectively influencing the technological process of firing.