Secondary hematite (SH) is a serious factor resulting in reduction degradation of iron ore sinter blast furnace; however, until now, quantitative study for SH formation had not been reported. In this work, the effects gangue composition, including MgO, Al2O3 and SiO2, on solid-state sintering process fines were investigated quantitatively. It shows that decreased from 67.84% to 46.11%, 35.44% 2...

In order to explore the influence of gradation and concentration on rheological parameters uncemented coal gangue-fly ash backfill (UCGFB) slurry, based fractal theory, particle size distribution mixture gangue fly under different mixing ratios are analyzed in this paper. On basis, UCGFB slurry studied a numerical simulation transportation is also carried out. The results show that (1) dimensio...

The large-scale accumulation and pollution of solid mining waste is an urgent issue. Coal gangue a prominent type waste, shows promise for use in high value-added products due to its content many important compounds, including SiO2 Al2O3. This study proposed the preparation highly porous ceramics from coal gangue, slime, coconut palm fibers. were produced at sintering temperature 950°C with fib...

Aiming at the utilization of coal gasification slag, it is proposed to prepare slag as mine filling material. The optimum ratio cement: slag: gangue 1:5:1, mass fraction 70%, and dosage quicklime 4%. strength backfill reaches 4.23mpa, which can meet requirements strength.