Title:
METHOD OF DEPHOSPHORIZATION OF COKE
Document Type and Number:
Japanese Patent JPS61138695
Kind Code:
A
Abstract:
PURPOSE: To leach a phosphorus component selectively, and to obtain coke with low phosphorus content effectively useful in reducing smelting of metal oxide, etc., by washing powder or granule of coke with an acid under a specific condition.
CONSTITUTION: Power or granule of coke is washed with an acid at ≤4pH under a condition to satisfy the relationship of acid solution concentration, temperature and leaching time determined by the equation [t is immersion time (hr); T is liquid temperature (°C)], for example, with an aqueous solution of sulfuric acid at 2pH, so that a phosphorus component (calcium phosphate) in the coke is selectively leached and removed.
EFFECT: Process is simplified, and treatment cost is reduced.
Inventors:
KATAYAMA HIROYUKI
SANO NOBUO
ENOKIDO TSUNEO
SASAKI TOSHIAKI
KOGA YOSHINORI
SANO NOBUO
ENOKIDO TSUNEO
SASAKI TOSHIAKI
KOGA YOSHINORI
Application Number:
JP25993684A
Publication Date:
June 26, 1986
Filing Date:
December 11, 1984
Export Citation:
Assignee:
NIPPON STEEL CORP
JAPAN METALS & CHEM CO LTD
JAPAN METALS & CHEM CO LTD
International Classes:
C22B5/10; B01D11/02; C10L9/02; (IPC1-7): B01D11/02; C10L9/02; C22B5/10
Attorney, Agent or Firm:
Kazuo Ozeki