Analyses on Blast Furnace Raceway Formation by Micro Wave Reflection Gunned through Tuyere

Matsui, Yoshiyuki; Yamaguchi, Yasuhiro; Sawayama, Muneyoshi; Kitano, Shinji; Nagai, Nobuyuki; Imai, Takashi

doi:10.2355/isijinternational.45.1432

Cited by 29 publications

(22 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For the comparison, the experimental data which were measured in Kobe Steel Ltd. Kakogawa No. 3 blast furnace using micro wave reflection gunned through tuyere by Matsui et al 3,4) are presented in Table 2. Their experimental data in Table 2 are for 135 mm tuyere diameter.…”

Section: Resultsmentioning

confidence: 99%

“…Yamaoka and Nakano 2) presented the calculated results of gas and particle flows in a small scale model blast furnace of which width was 0.5 m and height was 1.0 m. Their results showed the effect of the tuyere diameter and the tuyere length and the bosh angle on the gas and particle flows. Recently Matsui et al 3,4) measured the raceway depth in an actual blast furnace of Kobe Steel Ltd. at Kakogawa by the micro wave reflection gunned through the tuyere. Their experimental data showed the first (maximum) and the second (minimum) peaks of raceway depth, the standard deviation and the collapsing cycle.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Numerical Simulation of Blast Furnace Raceway Depth and Height, and Effect of Wall Cohesive Matter on Gas and Coke Particle Flows

Umekage

Yuu²,

Kadowaki

2005

ISIJ Int.

View full text Add to dashboard Cite

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Blast Furnace Raceway Depth and Height, and Effect of Wall Cohesive Matter on Gas and Coke Particle Flows

Umekage

Yuu²,

Kadowaki

2005

ISIJ Int.

View full text Add to dashboard Cite

“…Meanwhile the S 11 parameter changes a little with and without these two enlargement structures. The physical aperture of cylindrical waveguide is D 4 . The assembly of cylindrical waveguide and the first enlargement stage (L wg2ob ) enlarges the physical aperture to D ob .…”

Section: Radiation Pattern Of the Blowpipe Antennamentioning

confidence: 99%

“…4) The conventional microwave device integrated a gun (antenna) inside the blowpipe. Measurement systems, mentioned above, all permanently mounted components inside the blowpipe.…”

Section: Introductionmentioning

confidence: 99%

Blowpipe Antenna in Blast Furnace Raceway Depth Measurement

Wei

Chen

2015

ISIJ Int.

View full text Add to dashboard Cite

A high gain blowpipe antenna has been presented in this paper. The blowpipe is a pipe used to blow hot air into the Blast Furnace (BF). It has formed the antenna as the radiation unit. A multi-stages cylindrical waveguide has been designed and employed to be the feeding unit. The two units of antenna are separated outside and inside the BF. They are easy to assemble during the BF production process. The antenna operates from 24 to 26 GHz. The simulation result shows that the blowpipe antenna has 25 dBi gain, 20 dB return loss and 30° HPBW (Half Power Beam Width) at the frequency of 25 GHz. Prototype antenna has been fabricated and measured the raceway depth in a real BF. The experiment result shows that the blowpipe antenna can be used in raceway depth measurement. It has advantages of high gain and easy-to-assemble.

show abstract

“…In addition, the transition time from the peak detection position to the second peak position was defined as the raceway disintegration cycle. Figure 8 shows the effects of tuyere diameter on the measured raceway depth under the steady operation in measurement of raceway depth by microwave reflection intensity, 19) the second peak detection position and raceway disintegration cycle. The wider the tuyere diameter, the shallower is the second peak position and the shorter is the raceway disintegration cycle.…”

Section: Estimation Of Packed Structure At the Bosh Andmentioning

confidence: 99%

Analyses on Dynamic Solid Flow in Blast Furnace Lower Part by Deadman Shape and Raceway Depth Measurement

et al. 2005

Self Cite

View full text Add to dashboard Cite

As one of the factors of frequent troubles that occur in the transition period from all-coke operation to PC injection operation in blast furnace as well as increased troubles in recent years, increased size of the blast furnace and high-productivity operation are pointed out. Consequently, great importance is attached to burden distribution control and burden descent condition, or control of melting zone, deadman shape, solid flow at the lower part of furnace and others. In the present study, the reduced stockline surface profile was measured by the reflection intensity of microwave struck from the furnace top after blow-off with stockline reduced, and investigation was made on the countermeasures for changes in the raceway depth and furnace body profile during operation. As a result, it has been clarified that flow-down of coke into the lower part of blast furnace and inflow into the raceway are greatly subject to the existence of deadman which is the packed structure of the lower part of furnace, and further, they are closely related to dynamic behavior of the raceway and affect changes of the furnace body profile.

show abstract

Analyses on Blast Furnace Raceway Formation by Micro Wave Reflection Gunned through Tuyere

Cited by 29 publications

References 12 publications

Numerical Simulation of Blast Furnace Raceway Depth and Height, and Effect of Wall Cohesive Matter on Gas and Coke Particle Flows

Numerical Simulation of Blast Furnace Raceway Depth and Height, and Effect of Wall Cohesive Matter on Gas and Coke Particle Flows

Blowpipe Antenna in Blast Furnace Raceway Depth Measurement

Analyses on Dynamic Solid Flow in Blast Furnace Lower Part by Deadman Shape and Raceway Depth Measurement

Contact Info

Product

Resources

About