Synthesis of high alumina cement based on metallurgy wastes

Abstract

In this paper efficient types of binders – high alumina cements are considered. The shortage of industrial alumina and its high cost constrain the development of high-aluminate cements production. Waste from a number of metallurgical industries can be used as raw materials for their production. The aim of the investigation was to study the influence of metallurgical waste on the mineral formation of aluminate clinker and the properties of cement based on it. As a replacement of industrial alumina, dust of gas cleaning plants of aluminum electrolysis and slag of ferroalloys production were used. Aluminate clinkers were obtained in a laboratory furnace at a temperature of 1200-14000 °C. Mineral composition of clinkers was studied using chemical analysis, XRD and optical microscopy. The cements were obtained by grinding clinkers in a laboratory mill, then they tested for strength at the age of 28 days. It was established that the chemical and phase composition of dust allows to use it as a raw component in the production of high alumina cement. The investigations showed that the properties of alumina cement based on slag ferrovanadium production improved. Hydration activity of cement increases especially in the early period of its hydration.

Recycling in the production of mineral wool

“…To study the possibility of using aluminous cement of the GTs40 and GTs50 grades of a Russian manufacturer, there was conducted a research of briquettes, which are mineral wool and non-fibrous inclusions. Briquettes were exposed to thermal and humidity treatment binder together with waste of mineral wool production [6].…”

Maximize the use of municipal waste generated by the hydrogen peroxide industry in the production of high-quality refractory CAC

“…In addition, other wastes have been used in the production of alumina cement by Krivoborodovet al 20 , as a source of alumina, such as the slag of ferroalloys manufacture and the dust of gas cleaning plants of aluminum electrolysis. The study has indicated an improvement in the properties of alumina cement related to the slag from ferrovanadium production which contains 67.4 wt% of Al 2 O 3 .…”

Phase Formation Specifics in the High-Alumina Region of the СаО–Al2О3 System

“…Ordinarily, calcium aluminate phases in the largescale production of aluminous cements are synthesized by high-temperature alloying or sintering using raw materials that contain Al 2 O 3 and СаO and some amount of impurities as well [7,9,26,27]. The major impurities are silica and iron, magnesium, titanium, and alkali oxides.…”