Combustion and Gasification Behavior of Pulverized Waste Plastics during Injection into Blast Furnace

Asanuma, Minoru; Kajioka, Masahiko; Terada, Kaneo; Inoguchi, Takanori; Takashima, Nobuhiro

doi:10.3775/jie.91.219

Cited by 8 publications

(4 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The crusher crushed the sample continuously with a rotating speed of 20,000 rpm. The heat treatment products obtained at each temperature were crushed for 20 s, and the crushed samples were screened using sieves of different sizes (12,16,28,45,60,80, and 150 mesh).…”

Section: Pulverization and Screeningmentioning

confidence: 99%

“…However, a smaller particle size increases the production cost and technical difficulty. Asanuma et al [12] pulverized a mixture of various plastics into 0.2-0.4 mm through heat treatment, however, they didn't pay attention to the behavior of PVC plastics. Wang et al [13] obtained low chlorine hydrochar from PVC by hydrothermal carbonization; however, the hydrothermal treatment equipment of PVC is significantly eroded by the formed HCl, as it is in the solution state.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Pulverization of Waste Polyvinyl Chloride (PVC) Film by Low Temperature Heat Treatment and Properties of Pulverized Product for Blast Furnace Injection as Alternative Fuel

et al. 2022

View full text Add to dashboard Cite

Recycling of waste plastics is of great significance for human society. The pulverization of waste film plastics is a key technical link in the development of collaborative utilization of waste plastics in the steel industry. In this study, waste polyvinyl chloride film plastics were first heated at different temperatures; then the de-chlorination ratio pulverization and the properties of the pulverized products closely related to blast furnace injection, such as powdery properties, combustion and explosiveness, were further analyzed. The weight loss ratio increased significantly with an increase in temperature and was not obvious between 370 °C and 400 °C. The highest de-chlorination ratio was approximately 84% at 370 °C, and the relative chlorine content in the product was 9%. The crushing performance of heat-treated polyvinyl chloride film increased with increasing temperature. Before 370 °C, there were more pores in the samples, and the surface of the sample seemed to be damaged with the temperature was further increased. The pulverized polyvinyl chloride had better fluidity and strong jet flow compared to industrial injection coals. At the same time, compared with other carbonaceous materials, it also exhibited better combustion performances. The pulverized polyvinyl chloride belonged to non explosiveness substance despite its high volatile content. The obtained results demonstrated that the pulverized polyvinyl chloride obtained under the present conditions could be used for blast furnace injection to some extent.

show abstract

Section: Pulverization and Screeningmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Pulverization of Waste Polyvinyl Chloride (PVC) Film by Low Temperature Heat Treatment and Properties of Pulverized Product for Blast Furnace Injection as Alternative Fuel

et al. 2022

View full text Add to dashboard Cite

show abstract

“…The Japanese steel industry developed commercial waste plastic feedstock recycling processes using its blast furnace iron- and steelmaking (electric arc furnaces) processes. In the blast furnaces, finely pulverized dechlorinated waste plastics and pulverized coal are injected into the blast furnace through tuyeres as a substitute for coke to produce pig iron [ 33 , 57 , 58 ]. The blast furnace feedstock recycling substitution rate is 1.1 (1.1 ton of coke is substituted by 1 ton of waste plastics) [ 25 ].…”

Section: Mineral and Metallurgical Processes Using Recycled And VImentioning

confidence: 99%

Plastics—Villain or Hero? Polymers and Recycled Polymers in Mineral and Metallurgical Processing—A Review

et al. 2019

View full text Add to dashboard Cite

This review focusses on the use of recycled and virgin polymers in mineral and metallurgical processing, both high and ambient temperature processes, including novel applications. End of life applications of polymers as well as the utilisation of polymers during its life time in various applications are explored. The discussion includes applications in cleaner coal production, iron and steel production, iron ore palletisation, iron alloy manufacturing, manganese processing, E-wastes processing and carbon sequestration. The underlying principles of these applications are also explained. Advantages and disadvantages of using these polymers in terms of energy and emission reductions, reduction in non-renewables and dematerialisation are discussed. Influence of the polymers on controlling the evolution of micro and nanostructures in alloys and advanced materials is also considered.

show abstract

“…Since the collected waste plastics are heterogeneous mixture form different types, it is recommended to conduct heat treatment at 200 °C before its injection into the BF. The pre-treatment will generate a homogenous pulverized waste plastic mixture [123]. Moreover, the pre-treatment of waste plastics will perform de-chlorination for waste plastics which contain chlorine such as polyvinyl chloride (PVC) and hence avoid the corrosive effect on the BF tuyeres and the refractory materials in hearth lining.…”

Section: Waste Plastics and Biomass Injectionmentioning

confidence: 99%

Modern blast furnace ironmaking technology: potentials to meet the demand of high hot metal production and lower energy consumption

Mousa

2019

Metall Mater Eng

View full text Add to dashboard Cite

Iron and steel making is one of the most intense energy consuming in the industrial sectors. The intensive utilization of fossil carbon in the ironmaking blast furnace (BF) is related directly to CO2 emission and global warming. Lowering the energy consumption and CO2 emission from BF comes on the top priorities from both economic and environmental aspects. The BF has undergone tremendous modifications and development to increase production and improve the overall efficiency. Both technological development and scientific research drive one another to reach optimum operation conditions, which are very close to the ideal conditions; however, further development is still required to meet the stringent environmental regulations. The present article provides a comprehensive review of recent research and development which were carried out in modern blast furnace to increase the productivity meanwhile reduce the energy consumption and CO2 emission to meet the demand of steel market and the environmental protection. The recent technological and metallurgical improvements in the BF are intensively discussed including: (i) modifications of BF design, top charging and measuring system, (ii) upgrading of conventional top charging burden and alternative agglomerates, (iii) developing of tuyeres injection system and injected materials, and (iv) potentials of waste heat recovery and usage. These topics are reviewed and discussed in some details to elucidate the potential of recent progress in BF technology in saving the energy consumption and lowering CO2 emission. In this paper, the major research and development which have been carried out in ironmaking BF technology are reviewed with an overview of the future prospects.

show abstract

Combustion and Gasification Behavior of Pulverized Waste Plastics during Injection into Blast Furnace

Cited by 8 publications

References 6 publications

Pulverization of Waste Polyvinyl Chloride (PVC) Film by Low Temperature Heat Treatment and Properties of Pulverized Product for Blast Furnace Injection as Alternative Fuel

Pulverization of Waste Polyvinyl Chloride (PVC) Film by Low Temperature Heat Treatment and Properties of Pulverized Product for Blast Furnace Injection as Alternative Fuel

Plastics—Villain or Hero? Polymers and Recycled Polymers in Mineral and Metallurgical Processing—A Review

Modern blast furnace ironmaking technology: potentials to meet the demand of high hot metal production and lower energy consumption

Contact Info

Product

Resources

About