Study on Pollutants Control of Circulating Fluidized Bed Boiler Burning Low Calorific Value Coal

Wu, Wanzhu; Li, Ruixin; Wang, Hu; Gu, Congyang

doi:10.1007/978-981-16-1657-0_45

Cited by 1 publication

(1 citation statement)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to statistics, China's coal output in 2022 was 4.56 billion tons, and the washing proportion was 69.7%, of which about 90% was wet separation, and the amount of high-ash coal slime generated by wet separation was relatively large (Chen et al, 2014;Zhu, 2023). Meanwhile, the coal slime dewatering has disadvantages such as low efficiency, high treatment cost and low calorific value, and the coal preparation plants cannot directly sell coal slime and has no good treatment measures; as a result, they can only choose open storage (Wu et al, 2017;Lv et al, 2021). Therefore, the treatment, consumption and comprehensive utilization of high-ash coal slime has become an urgent problem to be solved.…”

Section: Introductionmentioning

confidence: 99%

Research on preparation and properties of porous ceramsites sintered with high-ash coal slime

Zhu,

Min,

2023

Physicochem. Probl. Miner. Process.

View full text Add to dashboard Cite

In order to realize the resource and harmless utilization of high-ash coal slime in coal preparation plants, porous ceramsites were prepared by the high-temperature sintering method with coal slime as raw material. The influences of sintering temperature, sintering time and ash content on the properties of porous ceramsites were studied by experiments, and the phase composition, micro-morphology and pore structure characteristics of ceramsites were analyzed by XRD, SEM and BET. The experimental results showed that with the increase of sintering temperature and sintering time, the amount of molten liquid in ceramsite green bodies increased, the densification degree of ceramsites increased gradually, the bulk density and the apparent density increased gradually, and the water absorption and the apparent porosity decreased gradually. However, with the increase of coal slime ash content, the quantity of pores within ceramsites increased first and then decreased. When the coal slime ash content was 55%, the bulk density of porous ceramsite sample was 0.549g/cm3, the water absorption rate was 64.63%, the specific surface area was 19.40m2/g, the crushing rate and wear rate were 0.14%, with rough surface, porous structure and excellent water absorption performance, which met the optimum performance requirements of porous ceramsites. At the same time, this research also provides a new idea and method for the reuse of high-ash coal slime resource, a by-product of coal washing and dressing

show abstract

Section: Introductionmentioning

confidence: 99%