Method for charging raw materials into blast furnace

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 12098437
APP PUB NO 20210095353A1
SERIAL NO

17041538

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

A method for charging raw materials into a blast furnace is as follows. The blast furnace includes a bell-less charging device that includes a plurality of main hoppers and an auxiliary hopper. The auxiliary hopper has a smaller capacity than the main hoppers. The method includes discharging ore charged in at least one of the plurality of main hoppers, and then sequentially charging the ore from a furnace center side toward a furnace wall side by using a rotating chute. After charging of the ore is started, only the ore is charged from the rotating chute at least until charging of 45 mass % of the ore is completed based on a total amount of the ore to be charged per batch; then, discharging of low-reactivity ore charged in the auxiliary hopper is started; and then, the low-reactivity ore is charged together with the ore from the rotating chute.

Loading the Abstract Image... loading....

First Claim

See full text

Family

Loading Family data... loading....

Patent Owner(s)

  • JFE STEEL CORPORATION

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ichikawa, Kazuhira Tokyo, JP 15 2
Ogasawara, Yasushi Tokyo, JP 13 25
Sato, Takeshi Tokyo, JP 434 4801

Cited Art Landscape

Load Citation

Patent Citation Ranking

Forward Cite Landscape

Load Citation

Maintenance Fees

Fee Large entity fee small entity fee micro entity fee due date
3.5 Year Payment $1600.00 $800.00 $400.00 Mar 24, 2028
7.5 Year Payment $3600.00 $1800.00 $900.00 Mar 24, 2032
11.5 Year Payment $7400.00 $3700.00 $1850.00 Mar 24, 2036
Fee Large entity fee small entity fee micro entity fee
Surcharge - 3.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge - 7.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge - 11.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge after expiration - Late payment is unavoidable $700.00 $350.00 $175.00
Surcharge after expiration - Late payment is unintentional $1,640.00 $820.00 $410.00