24 Naturally-occurring mackinawite (tetragonal FeS) with incorporated transition metals 25 is an important precursor to the formation of metal sulfides in ore deposits, but experimental 26 results have not been sufficient to establish clear trends in the structure and stability of the 27 transition-metal-enriched mineral. Using density functional theory with dispersion 28 corrections, we report...

Steel production involves three basic steps. At first, the heat source is to be produced to melt the iron ore. Next in a furnace iron is melted. Lastly, to produce steel the molten iron is processed. The advantage of steel over iron is greatly enhanced strength. The properties of steel are highly reliant on the amount of alloying elements, so that their levels are carefully controlled during it...

Humic acid is inexpensive, and has a wide range of sources strong adsorption force with the surface iron ore, size its affected by some factors such as humic concentration, pH solution, metal cations. The modified pellet binder (MHA) adhesion high viscosity was obtained through separation purification solid wastes lignite weathered coal chemical modification treatment successfully applied in pr...

An Order-Revealing Encryption (ORE) scheme gives a public procedure by which two ciphertext can be compared to reveal the order of their underlying plaintexts. The ideal security notion for ORE is that only the order is revealed — anything else, such as the distance between plaintexts, is hidden. The only known constructions of ORE achieving such ideal security are based on cryptographic multil...

Nome placer offshore gold grade estimation is a challenging problem in light of extreme ore heterogeneity. However, this type of phenomenon is quite common in placer ore grade variation. Further, the characterization of spatial ore grade variability and subsequent ore grade modelling of the deposit becomes problematic due to the unavailability of adequate samples. Being located in the Arctic, t...

A typical South Crofty ore containing minor amounts of arsenopyrite and chalcopyrite (ore A) gives 65% overall recovery of cassiterite in the spiral circuit, overall enrichment ratios being about 25-35. Maximum recovery occurs in the size range 53-110 /Lm(Fig. 2). However, recently treated ore types (ore B) have been much richer in sulphides, yielding up to 30°" As in the recleaner table concen...

A double Ore extension is a natural generalization of the Ore extension. We prove that a connected graded double Ore extension of an ArtinSchelter regular algebra is Artin-Schelter regular. Some other basic properties such as the determinant of the DE-data are studied. Using the double Ore extension, we construct 26 families of Artin-Schelter regular algebras of global dimension four in a seque...