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Using secondary smelting water-granulated nickel slag (SWNS) after iron extraction as the main raw material, made composite activator (flue gas desulphurization gypsum (FGDG) and carbide slag (CS) are the main activators, Na2SO4 and cement clinker (CC) are the auxiliary activators) with cementing agents (CA), and then made into mine cemented paste backfill (CPB) material with iron ore tailings (IOT). The factors affecting the mechanical properties such as the composition of raw materials and the amount of activator were studied by means of mechanical property test, X-ray diffraction (XRD) and scanning electron microscope (SEM), the ratio of CPB material was optimized, and the hydration mechanism of CPB material was analyzed. The results show that when the mass fraction of SWNS, FGDG, CS, Na2SO4 and CC in CA is 85%, 5%, 5%, 3% and 2%. The 28d flexural strength and compressive strength of CPB material of SWNS reach 1.99 MPa and 3.38 MPa, which meet the strength requirements of mine CPB material. The results of X-ray diffraction (XRD), scanning electron microscope (SEM) and hydration mechanism analysis showed that both vitreous and crystalline substances in, CA of SWNS could be hydrated, and the main hydration products were ettringite (AFt) and Ca, Mg containing hydrated aluminosilicate (C-M-S-H) gel.

Effect of WEDM Process Parameters on Surface Roughness and Waviness of Inconel 603 XL