Application of Response Surface Methodology for Modeling and Optimization of Preparation of High‐Alumina Iron Ore–Coal Composite Hot Briquette

Liu, Zhenggen; Chu, Mansheng; Wang, Hong‐tao; Zhao, Wei; Wang, Zheng

doi:10.1002/srin.201500247

Cited by 5 publications

(3 citation statements)

References 43 publications

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“…For carbon iron composite, compressive strength is a greatly important metallurgical property in terms of treatment, transportation, and subsequently charging into BF . The compressive strength of ICHB after gasification reaction was measured by an electronic universal testing machine (WDW‐QT10 type).…”

Section: Methodsmentioning

confidence: 99%

Investigation on Gasification Reaction Behavior and Kinetic Analysis of Iron Coke Hot Briquette under Isothermal Conditions

Wang

Chu

Guo

et al. 2018

steel research int.

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Gasification reaction behavior of iron coke as well as kinetic parameters is extremely important for its quality evaluation and practical application in an actual blast furnace. However, there are few researches on the gasification behavior of iron coke, especially for iron coke hot briquette (ICHB) prepared by hot briquetting process. In this paper, the gasification reaction behavior of ICHB is experimentally investigated under isothermal conditions. Meanwhile, the kinetic analysis for the gasification process of ICHB and the related mechanism are carried out. The results demonstrate that the increase of the reaction temperature causes the significant rise of the carbon conversion rate and the reaction rate of ICHB, while the post‐reaction strength is evidently decreased. The size degradation of ICHB after reaction is increasingly serious as the reaction temperature goes up, and more pores as well as cracks are generated inside the gasified ICHB. During the gasification, the reduction of iron oxide, the oxidization of metal iron, and the generation reaction of fayalite are concomitantly occurred. The most probable mechanism function is confirmed. Based on this model, the activation energy and pre‐exponential factor are conducted, which are 144.77 kJ mol−1 and 999.37 min−1, respectively.

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Section: Methodsmentioning

confidence: 99%

Investigation on Gasification Reaction Behavior and Kinetic Analysis of Iron Coke Hot Briquette under Isothermal Conditions

Wang

Chu

Guo

et al. 2018

steel research int.

Self Cite

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show abstract

“…In terms of ore-coal composite agglomerate, the compressive strength is one of the important physical properties from the viewpoint of preventing the agglomerate from becoming finely crushed during its handing, transportation and subsequent charging into blast furnace. 24,25 The main factors affecting the compressive strength of ICHB include iron ore ratio, coal ratio, hot briquetting temperature, carbonisation temperature and carbonisation time, etc. Thus, in order to ensure ICHB having qualified compressive strength and obtain the change law of ICHB compressive strength and optimised preparation parameters, the effects of the above factors on the compressive strength of ICHB are experimentally investigated through single factor experiment and orthogonal experiment.…”

Section: Methodsmentioning

confidence: 99%

Fundamental research on iron coke hot briquette – A new type burden used in blast furnace

Wang

Chu

Zhao

et al. 2016

Ironmaking & Steelmaking

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In order to improve blast furnace efficiency, reduce CO 2 emission and accelerate energy utilisation, a new preparation process of iron coke hot briquette (ICHB) based on the raw materials conditions in China, a new type blast furnace ironmaking burden, was experimentally investigated in this paper. The new preparation process was researched and optimised through single factor experiment and orthogonal experiment. Meanwhile, the reactivity and the post-reaction strength of ICHB prepared under the optimised conditions were tested and the effect of ICHB on the thermal performance of conventional coke was researched. In addition, softening and dripping properties of mixed burden with optimised ICHB charging was simultaneously investigated. The results showed that the optimised preparation parameters of ICHB include 15% iron ore, 65% bituminous coal, 350°C hot briquetting temperature, 1100°C carbonisation temperature and 4 hours carbonisation time. The reactivity and the post-reaction strength of ICHB prepared under the optimisation conditions are 62.4 and 10.6%, respectively. ICHB has protective effect on conventional coke and the protective effect is more obvious with 10% ICHB adding. With the increase of ICHB charging ratio, softening interval T 40 -T 4 of mixed burden is widened while melting interval T D -T S (namely cohesive zone) is narrowed. Additionally, the permeability of mixed burden becomes better and dripping ratio is first increased then decreased. The suitable charging ratio of ICHB in mixed burden is about 30%.

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“…Some authors investigated the carbothermic reduction and subsequent magnetic separation to separate Fe and P from high‐phosphorus iron ore . However, when the raw ore has complex mineralogy and high SiO 2 and Al 2 O 3 contents, the conversion and reconstruction of magnetic minerals became notably difficult .…”

Section: Introductionmentioning

confidence: 99%

Beneficiation of High‐Phosphorus Siderite Ore by Acid Leaching and Alkaline Oxide Reinforced Carbothermic Reduction‐Magnetic Separation Process

Wen

Yang

et al. 2016

steel research int.

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(1 of 4) 1770063 Cover Photo: The cover image shows an as-cast miniature slab of AISI 304 austenitic stainless steel microalloyed with 100 ppm Ti and 35 ppm B with physical dimensions of 300 450 50 mm. The slab has just been taken out of the mold it was cast in a vacuum induction oven. Further preparation of samples from the miniature slabs and the following scale formation research can be found in the article 1600365 by Timo Fabritius and co-workers. 1600314 The combination of an intercritical annealing process with a quenching and partitioning process allows to adapt the mechanical properties of the low-alloyed steel 22MnB5. The heating in the two-phase region allows customizing the ferrite-austenite ratio and to achieve an increased alloy concentration in the austenite. Due to an interrupted quenching and overaging the martensite is tempered in the TRIP-assisted steel. This paper provides a method for benefi ciation of high-phosphorus siderite ore. A combined metallurgy process is developed, which includes dephosphorization using H 2 SO 4 leaching at low concentration, reinforces carbothermic reduction with alkaline oxide additives (Na 2 CO 3 and CaO) and magnetic separation process. An iron concentrate has a high metallic iron content and a low content of harmful impurities, which can be used as a raw material for iron-making.

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Application of Response Surface Methodology for Modeling and Optimization of Preparation of High‐Alumina Iron Ore–Coal Composite Hot Briquette

Cited by 5 publications

References 43 publications

Investigation on Gasification Reaction Behavior and Kinetic Analysis of Iron Coke Hot Briquette under Isothermal Conditions

Investigation on Gasification Reaction Behavior and Kinetic Analysis of Iron Coke Hot Briquette under Isothermal Conditions

Fundamental research on iron coke hot briquette – A new type burden used in blast furnace

Beneficiation of High‐Phosphorus Siderite Ore by Acid Leaching and Alkaline Oxide Reinforced Carbothermic Reduction‐Magnetic Separation Process

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