Title:
METHOD OF PRODUCING WATER-GRANULATED SLAG
Document Type and Number:
Japanese Patent JP2019001679
Kind Code:
A
Abstract:
To improve the operation rate of a process of producing water-granulated slag by highly efficiently recovering fine particles of water-granulated slag contained in circulation water together with coarse particles of water-granulated slag as a product to decrease the water-granulation of fine particles contained in the circulation water to prevent the abrasion of piping and equipment in a circulation system, and by concurrently decreasing the deposition of the fine particles in a circulation water tank to shorten a shut-down time of the equipment necessary for cleaning the tank.SOLUTION: A method of producing water-granulated slag, comprising a process of spraying molten blast-furnace slag with pressurized water (cooling water) in a route of introducing molten blast-furnace slag into a water-granulation tank via a water-granulation conduit to rapidly cool the molten slag, thereafter separating water-granulated slag from pressurized water by way of solid-liquid separation to extract and obtain water granulated slag, in which a crosslinking polymer coagulant is added into a processing route prior to the solid-liquid separation or into the pressurized water to blend the crosslinking polymer coagulant and the slag in a state of a turbulent flow of a flow velocity of 0.5 m/sec or faster so as to make the water-granulated slag, water, and the crosslinking polymer coagulant exist together.SELECTED DRAWING: None
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Inventors:
MORIKAZU SHINGO
SHIMASE MASAHIRO
KUNIMOTO AKIHIRO
SHIMASE MASAHIRO
KUNIMOTO AKIHIRO
Application Number:
JP2017117236A
Publication Date:
January 10, 2019
Filing Date:
June 14, 2017
Export Citation:
Assignee:
NIPPON STEEL & SUMIKIN ECO TECH CORP
International Classes:
C04B5/02; C21B3/08; F27D15/02
Domestic Patent References:
| JP2016013540A | 2016-01-28 | |||
| JP2016013541A | 2016-01-28 | |||
| JP2014108394A | 2014-06-12 | |||
| JP2006289293A | 2006-10-26 | |||
| JP2013248584A | 2013-12-12 | |||
| JP2017104774A | 2017-06-15 |
Foreign References:
| WO2014091819A1 | 2014-06-19 |
Attorney, Agent or Firm:
Toshieko Kondo
Chongqing Sugano
Keita Takeyama
Kaoru Okada
Chongqing Sugano
Keita Takeyama
Kaoru Okada