Sintering characteristics of fluxes and their structure optimization

Abstract

Sintering characteristics of common fluxes and sintering blending ores, such as mineralization capacity, liquid generation capacity, consolidation strength, were examined to master the behavior and effect of fluxes in sintering. Based on fundamental studies, sinter pot tests were carried out to obtain the principles of optimizing the sinter flux structure. The results showed that strong mineralization capacity, liquid phase generation capacity, and consolidation strength were obtained as sintering blending ores combined with the calcareous flux, while relatively poor sintering characteristics were obtained as sintering blending ores combined with the magnesian flux. High reactive quicklime should be used as much as possible in the sintering mixture. It reached better sintering results while quicklime was used instead of limestone and its appropriate proportion in the sintering mixture was around 4wt%. On the premise of ensuring the MgO content, the dolomite amount should be decreased, and the substitution of quicklime for dolomite caused better sintering results. The granularity of serpentine should be refined with a proper size smaller than 2 mm. The application of the divided addition method brought the best sintering performance with 30wt% of quicklime and 70wt% of fuel.

Recycling ceramic waste as a raw material in sanitary ware production

“…These results reflected the ones from firing cone tests, restating that the WP acted as a flux material, which formed liquid-phase during sintering and filled open pores, thus increasing the ceramic densification. Although the granite is also used as a fluxing agent by the industry, the smaller particles of the pulverized WP could have been responsible for easing liquidphase formation [23]. The results for pyroplastic deformation showed no significant deviations from the control for formulations WP-5 and WP-10, while WP contents of 25% and above diminished the pyroplastic deformation.…”

Distinct Difference in High-temperature Characteristics between Limonitic Nickel Laterite and Ordinary Limonite

“…It is generally known that high-temperature characteristics of ores mainly including assimilability, liquid phase fluidity, strength of bonding matrix and formation characteristics of liquid phase are considered as the main evaluation indexes indicating the effect of ore properties on its sintering performance. [12][13][14] The assimilability is characterized as the reactivity of ores with CaO reflecting the difficulty of liquid phase formation during sintering, whereas liquid phase fluidity represents the effective bonding area of liquid phase and is essential to sinter consolidation. [15][16][17] The strength of bonding matrix is used to describe the bonding ability of liquid phase to solid particles and the self-strength of bonding phase.…”

Silico-ferrite of Calcium and Aluminum Characterization by Crystal Morphology in Iron Ore Sinter Microstructure

“…In sinters fluxed with limestone and dolomite these are calcium ferrites. 3) There are several types of calcium ferrites in sinters, depending on mixture basicity or chemical components present in the ore gangue. 4,5) There are two different kinds of calcium ferrites in current sinters.…”