Title:
高炉吹込み用微粉炭の製造方法およびその製造装置
Document Type and Number:
Japanese Patent JP6973321
Kind Code:
B2
Abstract:
To provide a method and an apparatus for producing fine coal for blast furnace blowing, which can control the fine coal particle size distribution after pulverization to a desired value regardless of the kind and supply amount of coal without complicating the process when a large quantity of fine coal for blast furnace blowing is produced by pulverizing and drying coal.SOLUTION: In the method for controlling the particle size distribution of fine coal after being pulverized by a roller mill and classified by a rotary classifier, acquired are a kind and supply quantity of the coal as a raw material to be supplied to the roller mill, a difference in pressures between that on a circulation gas inlet side and an outlet side of the roller mill, and a flow rate of the circulation gas. The opening degree of a suction blower damper is controlled by the rotation speed of the rotary classifier.SELECTED DRAWING: Figure 1
Inventors:
Sohei Ueoka
Kiyama Takuya
Kiyama Takuya
Application Number:
JP2018147754A
Publication Date:
November 24, 2021
Filing Date:
August 06, 2018
Export Citation:
Assignee:
jfe Steel Corporation
International Classes:
C21B5/00; B02C15/04; B02C23/00; B02C23/10; B02C25/00
Domestic Patent References:
| JP2157053A | ||||
| JP9047679A | ||||
| JP2018105512A | ||||
| JP2001254112A | ||||
| JP2003247008A | ||||
| JP2017202472A | ||||
| JP7080338A |
Other References:
木下正昭、山口啓樹、吉田博久,バウルミルによる石炭粉砕,燃料協会誌,日本,燃料協会,1990年09月,69、9,787-790
Attorney, Agent or Firm:
Ginza Marronnier Patent Office