Assessment of Microsilica as a Raw Material for Obtaining Mullite–Silica Refractories
Kenzhaliyev B. Biryukova A. Dzhienalyev T. Panichkin A. Imbarova A. Uskenbaeva A. Yusoff A.H.
January 2024Multidisciplinary Digital Publishing Institute (MDPI)
Processes
2024#12Issue 1
The possibility of using microsilica in the production of mullite–silica refractories was assessed. The chemical and mineralogical compositions of the raw materials, refractory Arkalyk clay and microsilica, were studied. It has been found that primary mullite and quartz formation occurs due to dehydration of kaolinite with the formation of intermediate metakaolinite. The introduction of alumina and microsilica into the charge composition promotes the formation of secondary mullite due to the interaction of aluminum oxide and highly dispersed chemically active microsilica. Free silica in compositions undergoes polymorphic transformations with the formation of cristobalite and tridymite. Mullite–silica refractories with an open porosity of 21%, a compressive strength of 42 MPa, and a thermal deformation temperature under the load of 0.2 MPa–1350 °C were obtained.
alumina , aluminosilicates , microsilica , mullite , mullite–silica refractory , porosity , refractory clay , strength , structure
Text of the article Перейти на текст статьи
Institute of Metallurgy and Ore Beneficiation JSC, Almaty, 050010, Kazakhstan
Mining and Metallurgical Institute, Satbayev University, Almaty, 050000, Kazakhstan
Faculty of Bioengineering and Technology, Universiti Malaysia Kelantan, Kota Bharu, 16100, Malaysia
Institute of Metallurgy and Ore Beneficiation JSC
Mining and Metallurgical Institute
Faculty of Bioengineering and Technology
10 лет помогаем публиковать статьи Международный издатель
Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026