Zinc processing tailings (ZPTs) of the Kharzet Youcef complex, Setif, Algeria, are mainly stockpiled in tailing dumps without use, occupying significant surfaces and negatively influencing human environment health. Incorporating ZPTs into building materials manufacturing is an effective solution to meet dual objectives environmental protection economic development. This study investigates influence firing temperature integrating as a partial replacement for clay on physic-mechanical...

Determining the Bond grindability test in a ball mill is one of most commonly used methods mining industry for measuring hardness ores. The an essential part work index methodology designing and calculating efficiency mineral grinding circuits. has several restrictions, including sample’s initial particle size distribution (PSD). This paper presents method when performed on samples with non-standard PSD. presented equation includes correction factor (k) applicable only P100 = 75 μm. defined...

Abstract Background and aim The use of amendments to immobilize metals in polluted soils is a widely accepted remediation approach, the framework circular economy, produced from mining and/or biomass waste have gained relevance. However, application such can also mobilize metalloids. Here we propose combination nanoscale zero-valent iron nanoparticles (nZVI) with dunite (mining waste) compost for restoration soil affected by high concentrations As metals. Methods To this end, treated pots...

Several metals and metalloids (e.g., As, Cd, Cu, Pb, Zn) are toxic at low concentrations, thus their presence in sediments can raise environmental concern. However, these elements be of economic interest, several techniques have been used for recovery some them widely applied to mining or industrial soils, but not sediments. In this work, wet high-intensity magnetic separation (WHIMS) was Pb Zn from polluted A composite sample 50 kg taken the Avilés estuary (Asturias, North Spain) with...

The area of Ponce Enríquez, Southern Ecuador, is one the most important artisanal and small scale gold mining (ASGM) areas in country, where informal operations can be found using amalgamation technique, even though it has been prohibited since 2010. Considering potential impact these operations, present research focused on heavy metal pollutants subsurface sediments at 214 sampling locations from several detailed campaigns rivers Fermín, Fermín Norte, Guanache, Villa, Siete. Four parameters...

Mining is a crucial sector in the global economy, providing essential materials for various industries, including construction, electronics, and energy. However, traditional mining practices often have significant negative impacts on environment. Therefore, integrating sustainable into has become vital. Grinding stage mineral processing industry, liberating valuable minerals from ore. it also one of most energy-intensive processes operations, consuming substantial amount electricity....

Ball mills have a low efficiency rate partially due to the lack of proper method monitor mill filling level, which makes it difficult control grinding process. The purpose this paper is explore possibilities that DEM offers characterize load torque tumbling ball in frequency domain and, from characterization, establish basis methodology capable estimating level. To achieve this, pilot scale was considered and campaign simulations experimental tests carried out dry conditions, considering...

Six different particle size distribution (Gates–Gaudin–Schuhmann (GGS), Rosin–Rammler (RR), Lognormal, Normal, Gamma, and Swebrec) models were compared under metallurgical coke grinding conditions (ball time). Adjusted R2, Akaike information criterion (AIC), the root mean of square error (RMSE) employed as comparison criteria. Swebrec RR presented superior criteria with higher goodness-of-fit lower AIC RMSE, containing minimum variance values among data. The worst model fitting was GGS,...

It is a well-known fact that the value of Bond work index (wi) for given ore varies along with grinding size. In this study, variability bysis carried out standard grindability tests on different critical metal ores (W, Ta), ranging from coarse (rod mills) to fine (ball mills). The relationship between wi and size did not show clear correlation, while (gpr) showed robust fitting in all cases quadratic curve very high regression coefficient. This result suggests that, when performing...

The interplay of structural, energetic, and chemical bonding features across the pressure-induced α-cristobalite → stishovite phase transition in SiO2 is fully characterized by first principles calculations topological analysis electron localization function. Under a martensitic approach, mechanism theoretically modeled at thermodynamic pressure using P41212 space group. A soft symmetric path determined with an activation barrier lower than 100 kJ/mol. No bond breaking found, but synchronous...