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T.V. Vakalova,N.P. Sergeev,V.E. Maksimova,P.G. Rusinov,D.I. Balamygin 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.106 No.-
The processes of obtaining a new type of ceramic proppants with high physical and mechanical propertiesbased on serpentinite rocks, which were not previously used for this purpose are investigated. Toincrease the strength of ceramic materials, methods of improving the sintering of magnesia-silicateceramics with a forsterite crystalline phase are considered. It was found that the activation of the sinteringprocess is provided by the transformation of hard-to-sinter forsterite into enstatite. This is possible byadding of siliceous raw materials with different reactivity (quartz sand, marshalite, gaize and diatomite)to the pre-calcined serpentinite. The use of diatomite and gaize additives in an amount of 20–30% insteadof quartz sand allows to reduce the firing temperature by 50–70 C (from 1300–1350 C to 1280 C–1250 C) and ensure the mechanical strength of pressed specimens up to 440 MPa. This made it possibleto develop compositions and technological parameters for obtaining magnesia-silicate proppants witha bulk density of 1.58–1.62 g/cm3 at a firing temperature of 1250–1300 C, capable of withstandingbreaking pressure up to 52 MPa.