—In this paper we present the results of analysis of the scientific and technical literature concerning the ways of obtaining wollastonite from various calcium and silicon-containing technogenic wastes accumulated on the territory of the Russian Federation. We proposed a method for producing autoclave needle-like wollastonite from waste of boric acid (borogipsa) containing both calcium and silicon constituents. The phase composition and morphology of the products autoclaving borogipsa were studied. It is found that the initial product has a crystalline phase of unreacted calcium sulfate anhydrous, tobermorite and xonotlite. After firing at 1000 °C, the amorphous calcium hydrosilicates are converted to a crystalline phase of wollastonite triclinic modification. The effect of firing temperature on phase composition and morphology of the compounds obtained by autoclave treatment were described. It is shown that with increase of the firing temperature up to 1200 °C along with a phase change, the composition variation of the particle morphology occurs. It is found that the processing borogipsa to obtain needle-like wollastonite recommended firing temperature should not exceed 1000 °C.
—Industrial waste, wollastonite, borogypsum.
Sofia B. Yarusova is with Institute of Chemistry, Far-Eastern Branch of Russian Academy of Sciences; 159 Prospekt 100-letya Vladivostoka, Vladivostok, 690022, Russian Federation. She is also with Vladivostok State University of Economics and Service; 41 Gogolya street, Vladivostok, 690014, Russian Federation (e-mail: email@example.com).
Pavel S. Gordienko and Aleksandr V. Perfilev are with Institute of Chemistry, Far-Eastern Branch of Russian Academy of Sciences; 159 Prospekt 100-letya Vladivostoka, Vladivostok, 690022, Russian Federation.
Yogesh C. Sharma is with the Department of Chemistry, Indian Institute of Technology (BHU) Varanasi, Varanasi 221005, India.
Andrey V. Kozin is with Far-Eastern Federal University; 8 Sukhanova street, Vladivostok, 690950, Russian Federation.
Cite: Sofia B. Yarusova, Pavel S. Gordienko, Yogesh C. Sharma, Aleksandr V. Perfilev, and Andrey V. Kozin, "Industrial Waste as Raw Material for Producing Synthetic Wollastonite in Russia," International Journal of Environmental Science and Development vol. 8, no. 1, pp. 1-5, 2017.