Lignite-coke briquets in ferroalloy production

Vorob’ev, V. P.; Orlov, P. P.; Islamov, S. R.; Stepanov, S. G.

doi:10.3103/s0967091215030146

Cited by 4 publications

(3 citation statements)

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“…The surface area (Figure ) of the microwave-produced cokes for their optimal petrography conditions ranges between 5.2 and 6.7 m 2 g –1 , while the conventional UK Coke had an average surface area of 12.0 m 2 g –1 . Blast furnace coke surface area is in the range of 1–66 m 2 g –1 , ,− and thus, the surface areas observed fall within the expected band for cokes. The low surface area of cokes indicates that melting occurred in parent coals during carbonization. , The melting process destroys the original pore structure, and only large pores form during the resolidification stage of carbonization.…”

Section: Resultsmentioning

confidence: 59%

Formation of Metallurgical Coke within Minutes through Coal Densification and Microwave Energy

Williams

Ure²,

Stevens

et al. 2019

Energy Fuels

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This paper shows how feedstock densification gives rise to a step change in the time required to create a metallurgical grade coke using microwave energy. Five densified coking and noncoking coals were heated in a multi-mode microwave 2450 MHz cavity for varying treatment times (2-20 minutes) with a fixed power input (6 kW). Proximate analysis, intrinsic reactivity, coke reactivity, dielectric properties, and petrographic analysis of the coals and microwave produced lump cokes were compared to a commercial lump coke. Densifying the sample prior to microwave treatment enabled a dramatic acceleration of the coking process when combined with targeted high microwave energy densities. It was possible to form fused coke lump structures with only 2 minutes of microwave heating compared to 16-24 hours via conventional coking. Anisotropic coke morphologies (lenticular and circular) were formed from non-coking coal that are not possible with conventional coking and increasing treatment time improved overall coke reflectance. Three of the coals produced coke with equivalent coke reactivity index values of 20-30, which are in the acceptable range for blast furnaces. The study demonstrated that via this process, non-coking coals could potentially be used to produce high quality cokes, potentially expanding the raw material options for metallurgical coke production.

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Section: Resultsmentioning

confidence: 59%

Formation of Metallurgical Coke within Minutes through Coal Densification and Microwave Energy

Williams

Ure²,

Stevens

et al. 2019

Energy Fuels

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“…The amount of thermocoke obtained compared to the input of lignite is in the ratio of 4:1. Hence, both lignite coke and thermal energy are produced in the same boiler [5]. The components of lignite and lignite coke are expressed in Table 4 [5].…”

Section: Lignite Coke Productionmentioning

confidence: 99%

“…Making the lignite coke upgrades the quality of fuel which means that it will require less amount. Producing lignite coke might be another source of energy for the power generation in the near future [5]. The aim of this paper is to propose and compare the uses of different cokes in power generation from metallurgical coke with coke oven gas and lignite coke as a fuel.…”

Section: Introductionmentioning

confidence: 99%

Comparison of metallurgical coke and lignite coke for power generation in Thailand

Ratanakuakangwan

Tangjitsitcharoen

2017

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. This paper presents and compares two alternatives of cokes in power generation which are the metallurgical coke with coke oven gas and the coke from lignite under the consideration of the energy and the environment. These alternatives not only consume less fuel due to their higher heat content than conventional coal but also has less SO 2 emission. The metallurgical coke and its by-product which is coke oven gas can be obtained from the carbonization process of coking coal. According to high grade coking coal, the result in the energy attitude is not profitable but its sulfur content that directly affects the emission of SO 2 is considered to be very low. On the other hand, the coke produced from lignite is known as it is the lowest grade from coal and it causes the high pollution. Regarding to energy profitability, the lignite coke is considered to be much more beneficial than the metallurgical coke in contrast to the environmental concerns. However, the metallurgical coke has the highest heating value. Therefore, a decision making between those choices must be referred to the surrounding circumstances based on energy and environment as well as economic consideration in the further research.

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Production of activated carbon and other products from low rank coals

Harp¹

2017

Low-Rank Coals for Power Generation, Fuel and Chemical Production

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Lignite-coke briquets in ferroalloy production

Cited by 4 publications

References 0 publications

Formation of Metallurgical Coke within Minutes through Coal Densification and Microwave Energy

Formation of Metallurgical Coke within Minutes through Coal Densification and Microwave Energy

Comparison of metallurgical coke and lignite coke for power generation in Thailand

Production of activated carbon and other products from low rank coals

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