Ore-proportioning optimization technique with high proportion of Yandi ore in sintering

Wu, Shengli; Huang, Han; Li, Haixia; Xu, Jian; Yang, S. F.; Liu, Xiaoqin

doi:10.1007/s12613-010-0102-5

Cited by 15 publications

(6 citation statements)

References 2 publications

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“…In addition to the traditional room temperature characteristics of iron ores, high temperature characteristics of iron ores get the attention of researchers gradually. WU's research indicated that 5 kinds of high temperature characteristics of iron ores could reflect the behavior and role of iron ores in the sintering process, 1) and differences of assimilation characteristics between various iron ores and the ore blending optimization based on the high temperature characteristics such as assimilation characteristic has been also studied, 2,3) but the influencing factors of the assimilation characteristic of iron ores were not studied clearly. In addition, Yang 4) also studied the reaction between nuclei iron ores with the initial melt formed in the adhesive powder, and the assimilation was evaluated by the composition of the mineral composition, which was different from the assimilation temperature of iron ores in the present study.…”

Section: Introductionmentioning

confidence: 99%

Influencing Factors and Effects of Assimilation Characteristic of Iron Ores in Sintering Process

Zhang

Chen

et al. 2014

ISIJ Int.

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Iron ore's assimilation characteristic reflecting the beginning formation temperature of liquid phase in sintering process plays very important role on the fluidity of liquid phase and bonding strength of sinter body. Experimental study of assimilation characteristics of 12 kinds of iron ores were conducted using micro-sinter equipment, and pure reagent simulating tests of assimilation characteristic were also carried out for the purpose of achieving the influence of chemical composition on the assimilation characteristic. In addition, effects of assimilation characteristic of iron ore on the fluidity and bonding capacity of bonding phase were also researched. This study showed that SiO2 and LOI promoted the assimilation of iron ore, low Al2O3 (<1.5 mass%) was good to the assimilation, but high Al2O3 (≥1.5 mass%) was bad, MgO was adverse to assimilation of magnetite concentrate. In addition, lower assimilation temperature of iron ore led to higher superheat degree of liquid phase at a certain sintering temperature, then higher liquid fluidity and bonding strength.

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Section: Introductionmentioning

confidence: 99%

Influencing Factors and Effects of Assimilation Characteristic of Iron Ores in Sintering Process

Zhang

Chen

et al. 2014

ISIJ Int.

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“…SJY was a fine ore with 96.31% passing 0.2 mm, 100% passing 1 mm, however YD was coarse ore with only 8.37% passing 0.2 mm, 29.91% passing 1 mm. The experimental method of sintering basic characteristics had been introduced in relevant literature; the paper will not repeat the description [12][13][14].…”

Section: Characterizationmentioning

confidence: 99%

“…The sinter basic characteristic of different ore (a: assimilability temperature; b: liquidity index; c: bonding phase strength)The effect of SiO2 content on the assimilability temperature is shown inFig 4.The SiO2 content had a quadratic relationship with the assimilation temperature as shown in Eq (13)…”

mentioning

confidence: 99%

Influence of iron ore concentrate on the characteristics of sintering and reduction of sinter

Guo

Feng

Jiang

et al. 2020

J min metall B Metall

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As Australia is the main iron ore importing country for China, the abundant mineral resources of Australia are the primary raw materials for the sintering process. To better understand the properties of different iron ores from Australia and then guide the sintering process, this study selected four types of Australian ore and one type of domestic ore, and their properties were investigated under different conditions. The experiment of single iron ore sintering was studied to examine the influence of different iron ores on the metallurgical properties of sinter. From this study, the following results were obtained: GG showed poor fluidity and higher assimilability temperature, but the bonding phase strength was the highest; YD showed better fluidity and lower assimilability temperature, whereas SJY (domestic ore) showed better fluidity and higher bonding phase strength, and lower assimilability temperature. The influence mechanism of iron ore on the fluidity was further analyzed by using SEM and ion theory of slag. With the increase SiO2 content of iron ore, the fluidity index increased, the main reason was that the amount of liquid phase increased and the melting point decreased during the sintering. However, an excessive amount of SiO2 caused the decrease of fluidity index of iron ore; the main reason was that the fluidity of the liquid phase itself decreased and secondary hematite appeared. In the case of the higher SiO2 content of iron ore, the main bonding phase was calcium silicate. With the decrease of SiO2 content, the calcium silicate transformed into calcium ferrite. The main reason for this was that the Gibbs free energy of calcium ferrite and dicalcium ferrite (2CaO?SiO2) was higher than that of calcium silicate in the temperature ranges of 400-1600 K. The reduction degree of YD was the highest in all the cases and that of GG was the lowest. Activation energies of 5.39, 3.14, 3.51, 4.47 and 2.92 kJ/mol were obtained for the reduction of GG, PB, BH, SJY, and YD, respectively. In all the cases, the reaction corresponded to the model function of F1(?), and the integral form was -ln(1-?)=kt. Through this investigation, it could be concluded that the most appropriate ore category for sinter pot was YD.

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“…Therefore, the self-strength of the bonding phase played an important role in the strength of the sinter [15,[20][21]. The blending ore and flux were mixed according to a certain binary basicity, and then extruded into a cylindrical cake sample.…”

Section: (3) Consolidation Strengthmentioning

confidence: 99%

Sintering characteristics of fluxes and their structure optimization

Guo

Huang

et al. 2011

Int J Miner Metall Mater

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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.

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Ore-proportioning optimization technique with high proportion of Yandi ore in sintering

Cited by 15 publications

References 2 publications

Influencing Factors and Effects of Assimilation Characteristic of Iron Ores in Sintering Process

Influencing Factors and Effects of Assimilation Characteristic of Iron Ores in Sintering Process

Influence of iron ore concentrate on the characteristics of sintering and reduction of sinter

Sintering characteristics of fluxes and their structure optimization

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