As an industrial solid waste, the discharge of a large amount red mud (RM) causes serious environmental problems; thus, proportion RM co-combustion has been proposed to solve consumption problem. In this paper, experiment with various proportions was conducted on 0.2 t/h circulating fluidized bed (CFB) boiler. Desulfurization performance, combustion characteristics, and ash deposition character...

To study paste backfill corrosion mechanisms in chloride and sulfate environments, we studied the effect of on strength after 7, 14, 28, 40 days. The solutions concentrations are 0 g/L, 0.5 1.5 4.5 or 15 g/L. obtained specimens were analyzed by performing uniaxial compressive tests, X-ray diffraction (XRD), scanning electron microscopy (SEM). results show that significantly increased specimen a...

2-phosphonobutane-1,2,4-tricarboxylic acid is(pbtc) a member of phosphonate family, and used as corrosion and scale inhibitor in cooling water systems. phosphonocarboxylates as a member of organophosphorus compounds have c-p and p-o bonds in their structures. pbtc is mainly used as carbonate scale inhibitor (caco3), sulphate scale inhibitor (caso4), corrosion inhibitor of low alloyed steel, eff...

To modulate the rate of hydration calcium sulfate hemihydrate (HH) to dihydrate for industrial applications, additives (both accelerants and retardants) are added HH. Here we explore in detail kinetics mechanism HH presence accelerators K 2 SO 4 or ZnSO , also when a retardant (citric acid tartaric acid) is added. Retardants tend lower maximum temperature reaction increase time needed reach 50%...

The success of innovative fouling mitigation techniques such as ion implantation depends upon early stage of scale formation on heat transfer surface. This is because the first crystalline nuclei that appear on the surface during the initial period dictate how fouling would develop in latter stages. In this study, the initial period of deposition of calcium sulphate on heat transfer surfaces ha...

Structure analysis using single-crystal diffraction was carried out as a contribution to the dispute about the nature of the water channel structure of bassanite (CaSO(4)·0.5H(2)O). A recent result of Weiss & Bräu (2009) for the crystal structure of bassanite (monoclinic, space group C2) at ambient conditions of air humidity was confirmed. In the presence of high relative air humidity the cryst...

The addition of inorganic expanded aggregates, such as perlite or vermiculite is well known in gypsum plasters. However, the reuse organic wastes coatings like plasters and renders has been poorly studied. This paper shows effect tire rubber on mechanical properties fire performance waste was added to mixture mass percentages 14.50% (C1) 46.60% (C2). Flexural compressive strength made with visi...

Gypsum plasters are often used in buildings to provide passive protection against fire. This paper studies the fire behaviour of lightweight containing moderate and high doses expanded perlite. A propane flame was study heat transmission through plaster from exposed side back (2 cm thickness) using an IR camera. The microstructural mineralogical variations induced by were analysed scanning elec...