Сибирский федеральный университет

Тип публикации: доклад, тезисы доклада, статья из сборника материалов конференций

Конференция: BUILDINTECH BIT 2020. INNOVATIONS AND TECHNOLOGIES IN CONSTRUCTION; Belgorod; Belgorod

Год издания: 2020

Идентификатор DOI: 10.1088/1757-899X/945/1/012062

Аннотация: Priority directions in innovative technologies of the construction materials industry are the ex-pansion of the use of mineral and chemical additives in the production of cements, as well as alternative raw materials and fuels in production processes. During the production of alumi-num at the enterprise JSC RUSAL Krasnoyarsk, the method of electrolytic reduction of alumi-num oxide or alumina dissolved in a cryolite-based melt generates fluorocarbon-containing (FCC) waste, which currently accumulates more than 16,000 tons per year. Due to the in-creased year-round generation of waste with a high content of carbon, fluorine and aluminum, it is urgent to develop technologies that will effectively use them as a new mineralizer product for the production of Portland cement clinker - calcium fluoride. This paper describes the thermal method of waste processing FCC for receipt of the mineralizing agent (fluorite). The disadvantage of FCC as a raw material is an increased concentration of alkali metals, whose oxides negatively affect the process of hydration of clinker minerals, and lead to the for-mation of efflorescence on products. To reduce their content, the finished fluorite was washed with water. Calcium fluoride as a mineralizing agent in the production of Portland cement, re-duces the clinkerization temperature, increases the content of alite, changes the stability, pol-ymorphism and reactivity of phases. The resulting fluorite with a high mass concentration of 73.9% CaF2 makes it possible to reduce the clinker formation temperature, which increases the energy efficiency of obtaining Portland cement. The technological process for removing alka-line components from the product will reduce the likelihood of destructive processes in con-crete caused by the aggressive action of reactive silica aggregates and freezing and thawing processes.

Журнал: IOP Conference Series: Materials Science and Engineering

Выпуск журнала: 945

Номера страниц: 012062-012062

Издатель: Institute of Physics Publishing

• Endzhievskaya I.G. (Siberian Federal University)
• Demina A.V. (Siberian Federal University)
• Lavorenko A.A. (Siberian Federal University)

• РИНЦ (eLIBRARY.RU)
• Scopus