The effect of briquette composition on coking pressure generation

Florentino-Madiedo, L.; Díaz-Faes, E.; Barriocanal, C.

doi:10.1016/j.fuel.2019.116128

Cited by 11 publications

(7 citation statements)

References 34 publications

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“…The problem with adding charcoal to a coal blend (CB) is that charcoal is not a coking coal and depending on the amount added and how well it interacts with the forming biocoke, it might have a significant impact on its characteristics. This occurs because charcoal is an inert material during the plastic phase of the coking process, it remains solid, which leads to poorer quality of biocokes [16]. Several factors have been proved to reduce these negative effects, for example a higher density, higher carbonization degree and bigger particle size of the charcoal used [4].…”

Section: Introductionmentioning

confidence: 99%

Impact of the Addition of Pyrolysed Forestry Waste to the Coking Process on the Resulting Green Biocoke

Solar

Caballero

Barriocanal

et al. 2021

Metals

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The suitability of the charcoal obtained from woody biomass pyrolysis in a continuous screw reactor at 573, 773, 973, 1173 K temperature profile as fuel and reducing agent in metallurgical applications has been evaluated, in order to reduce the CO2 emissions in these processes. On the one hand, a comparative study between charcoal and commercial reducers has been carried out. On the other hand, different proportions of this charcoal have been added to an industrial coking coal blend and carbonized together in a semi-pilot movable wall oven, to study the influence in the plastic and mechanical properties of the produced biocoke. The charcoal obtained fulfills the requirements to be used as fuel and reducer in non-ferrous processes where no mechanical strength is required, like rotary kilns, in substitution of fossil reducers. Its higher heating value (>32 MJ kg−1) is in the range or over those of fossil coals, with the advantage of not containing polluting elements (S, N) and having less ash. The addition of up to 0.9 wt.% almost does not affect the quality of the biocoke; but the addition of ³2 wt.% degrades the biocoke mechanical and plastic properties below the demanded requirements. Moreover, biocoke reactivity seems independent of the amount of charcoal added.

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Section: Introductionmentioning

confidence: 99%

Impact of the Addition of Pyrolysed Forestry Waste to the Coking Process on the Resulting Green Biocoke

Solar

Caballero

Barriocanal

et al. 2021

Metals

View full text Add to dashboard Cite

show abstract

“…The addition of materials which act as an inert is one of the methods for controlling the coking pressure [61][62][63][64][65]. In the case of biomass, its addition both in loose form and in briquettes resulted in a reduction in coking pressure [34,64]. Taking into consideration aforementioned information, incorporation of brown coal to the coking blend may reduce coking pressure due not only to the "inert" effect but also due to the "fissure effect".…”

Section: Coke Technological Parametersmentioning

confidence: 99%

“…The technology of partial briquetting of the coal feed has found industrial application in Asian countries, especially in Japan but also in India and South Korea [3,28]. In recent years, the interest in applying briquetting technology to the production of coke has increased [3,11,[19][20][21][22][29][30][31][32][33][34][35]. Montiano et al [23] carried out a comparison of the direct addition of biomass (chestnut sawdust) to coking blends and its addition with the use of briquetting (as one of the ingredients).…”

Section: Introductionmentioning

confidence: 99%

“…According to the authors, optical anisotropy index (OAI) of obtained cokes is the parameter which best explains the reactivity results. In other research, Florentino-Madiedo et al [34] studied the effect of briquette composition on coking pressure generation. It was found that for the addition of all tested briquettes, regardless of their quantity (up to 20%), the coking pressure was reduced.…”

Section: Introductionmentioning

confidence: 99%

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Use of Alternative Raw Materials in Coke-Making: New Insights in the Use of Lignites for Blast Furnace Coke Production

2020

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This paper presents the results of studies on the possibility of using lignite to produce blast furnace coke. The aim of the investigation was to evaluate the influence of lignite addition (direct addition or incorporated into briquettes) on the textural, structural and quality parameters (NSC-CRI and CSR) of blast furnace coke. It was found that the introduction of lignite in briquettes (4.5% addition) allows coke to be produced that is characterized by equally high NSC parameters as for coke obtained without lignite addition for standard top-charged operation.

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“…At the same time, previous studies have shown that small amounts of tires or biomass added to a bituminous coal will produce a reduction of coking pressure without affecting coke quality and composition, including S and ash in the case of waste tires. − Although the percentages proposed are low in order to minimize possible deleterious effects, the impact on the amount of waste recycling is important. It is necessary to consider the amount of coke and waste plastic produced in the area to avoid transport costs.…”

Section: Introductionmentioning

confidence: 99%

Use of Biomass and Waste Tires to Facilitate the Use of HDPE in Coking

et al. 2023

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This work examines the role of various wastes such as pine sawdust, tire crumbs, and hydrochar from pine sawdust in reducing the deleterious impact of high-density polyethylene (HDPE) on coke contraction during coking. Contraction assessed using the Koppers-INCAR test was used as an indirect measurement of coking pressure. The Koppers-INCAR contraction of ternary blends containing coal, HDPE, and one of the other additives was tested together with their devolatilization in a thermobalance. The existence of synergism between the additives was examined to determine whether there were both positive and negative interactions between HDPE and other additives. The temperature corresponding to a 2% conversion increased with the use of additives; this was related to the degree of dangerousness of the blends. In addition, the effect of the additives on coal fluidity and coke quality was tested.

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The effect of briquette composition on coking pressure generation

Cited by 11 publications

References 34 publications

Impact of the Addition of Pyrolysed Forestry Waste to the Coking Process on the Resulting Green Biocoke

Impact of the Addition of Pyrolysed Forestry Waste to the Coking Process on the Resulting Green Biocoke

Use of Alternative Raw Materials in Coke-Making: New Insights in the Use of Lignites for Blast Furnace Coke Production

Use of Biomass and Waste Tires to Facilitate the Use of HDPE in Coking

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