A simplified model for SO2 generation during spontaneous combustion of coal gangue was put forward and validated using the measured data. Using proposed model, effects initial temperature inside fresh air supply on were discussed. The results showed that, higher could accelerate oxidation rate FeS2 increase maximum concentration SO2. If increased by about 37%, total 166%. Fresh had less signifi...

In this experiment, the influence of coal gangue as admixture on performance dry-mixed mortar was studied, and results were analyzed by XRD SEM. The effects different ways crushing, particle size distribution, gangue, cement, admixture, water content retention, consistency, 7 d compressive strength investigated. show that optimum hammer crushing through 3 mm sieve cement is 83% 17% total mass (...

Most of the world’s nickel is extracted from the mineral pentlandite, (Ni, Fe)9S8, which frequently occurs in ores containing predominantly pyrrhotite and various non-sulRdes, some of which contain magnesium (Table 1). The nickel content in such sulRde ores is generally low (0.2}3%) and varies from place to place in the same deposit. The low nickel content of the present-day nickel sulRde ores ...

The typical problems caused by Mining Subsidence and mining pollution made by coaling, made the Mine Subsidence reclamation and retorting the integrated mining environment necessary. Then, we create effective management measures of “full investigation, scientific planning, focused, sound institutions, the establishment of the system” and create the advanced technology of “mud pump reclamation, ...

The distribution of antimony (Sb) in topsoil and moss (Dicranum angustum) in disturbed and undisturbed areas, as well as coal and gangue, in Ny-Ålesund, Arctic was examined. Results show that the weathering of coal bed could not contribute to the increase of Sb concentrations in topsoil and moss in the study area. The distribution of Sb is partially associated with traffic and historical mining...

The pulp rheology is an important factor affecting flotation performance. Gangue minerals have a significant impact on the rheological property of smithsonite (ZnCO3). complex (high viscosity, poor dispersion) will adversely affect grade and recovery concentrate. To address this problem, effect gangue (kaolinite, calcite, quartz) behavior was investigated with measurement test. results showed t...

Rare sulphate of nickel, retgersite, was identified on the one specimen collected dump Lill shaft, Březové Hory ore district, Příbram (Czech Republic) in 1990s. The consists quartz gangue with dominant millerite and sphalerite. Retgersite forms light blue to blue-green curved fibrous microcrystalline aggregates up 2 mm size vitreous lustre, growing surface small outer vugs supergene altered gan...

The feasibility of preparing coal gangue-based geopolymer mortar (CGBGM) with composite-activated gangue was experimentally explored in this paper. effects water-to-binder ratio (W/B), alkali content (A), and slag (S) on the fluidity performances CGBGM were investigated. ANOVA method employed to evaluate significance level influenced factors. Moreover, microstructure, element compositions, qual...