Factors affecting the strength of formed coke made from lignite char

Influence of coal tar–water emulsion on carbonisation of caking coals

“…However, until now there is no satisfactory explanation of a complex variation of the strength parameters of briquettes and coke or the fluidity of the plastic mass with a gradual increase of pitch additives to coal [1,5,8,25]. It was proposed to consider the addition of about 12% for briquettes [6] and 5-10% for coal blends [8,13] (more precisely 7% CTP [9,25]) to be an optimal amount.…”

“…Researchers underline the importance of porosity of the tar added that affects the porosity of briquettes [10]; no less important is its fluidity and ability to penetrate into pores [3,7]; the interaction of complex blends of coal and pitch is also of a great significance [4]. While the content of a binder in formed coke can reach 20% [3,5] its optimal level for the strength of final briquettes is 12-15% [5,6].…”

“…To produce briquettes coal tar [1,7], its heavier fractions [3,4], lignite char [5], petroleum pitch [4] and asphalt [3] may be used. Researchers underline the importance of porosity of the tar added that affects the porosity of briquettes [10]; no less important is its fluidity and ability to penetrate into pores [3,7]; the interaction of complex blends of coal and pitch is also of a great significance [4].…”

“…Studies into the use of these additives are mainly performed in two directions: for the production of formed coke [5][6][7] or the improvement of the plastic properties of coals in the process of carbonisation [8,9].…”

Structural characterization of carbonized briquette obtained from anthracite powder

“…The atomic C/H ratio of the binders played an important role in controlling the strength of carbonized briquettes, and binders with a C/H ratio greater than 1 were preferable. Taylor and Ç oban [7] reported that the binder/coal ratio and coal particle size influenced the strength of carbonized briquettes. Under the given addition of binder, the smaller coal particle size had a positive effect on the bond between coal particles and binder.…”