Global Patent Index - EP 0511121 A1

EP 0511121 A1 19921028 - Desulfurisation agent for pig iron, comprising calcium carbide and an organic binder.

Title (en)

Desulfurisation agent for pig iron, comprising calcium carbide and an organic binder.

Title (de)

Entschwefelungsmittel für Roheisen, aus Calciumkarbid und organisches Bindemittel.

Title (fr)

Désulfurant pour fonte constitué de carbure de calcium et de liant organique.

Publication

EP 0511121 A1 19921028 (FR)

Application

EP 92420097 A 19920331

Priority

  • FR 9104452 A 19910402
  • FR 9109557 A 19910718
  • NL 9201746 A 19921008

Abstract (en)

New product for desulphurising liquid pig iron, consisting essentially of calcium carbide and of an organic binder, and process for its manufacture. <??>The product consists of technical calcium carbide powder, with the optional addition of products intended to produce a gas release in the bath or to modify the composition of the slag, coated or agglomerated by means either of resins or of an organic compound with a well-established melting point and solid at room temperature. <??>The process comprises a number of stages: mixing the carbide and additives with binder, resin or the organic product, agglomeration by forming nuts, tablets, compression or extrusion, and optional remilling and screening to obtain the desired particle size distribution. <??>The product is introduced into the liquid pig iron with a lance, by gravity or in the form of cored wire. It has the advantage of good pourability, increased efficiency and reduced reactivity towards moisture. It is employed for the desulphurisation of pig iron, both in refining and in casting. <IMAGE>

IPC 1-7

C21C 1/02

IPC 8 full level

C21C 1/02 (2006.01); C22B 1/244 (2006.01)

CPC (source: EP US)

C21C 1/025 (2013.01 - EP US); C22B 1/244 (2013.01 - EP US)

Citation (search report)

  • [XD] EP 0360223 A2 19900328 - SUEDDEUTSCHE KALKSTICKSTOFF [DE]
  • [X] EP 0005124 A2 19791031 - ITALSIDER SPA NUOVA [IT]
  • [YD] EP 0184723 A1 19860618 - CANADA CYANAMID [CA]
  • [Y] US 4533572 A 19850806 - NEELAMEGGHAM RAMASWAMI [US], et al
  • [A] EP 0279894 A1 19880831 - CANADA CYANAMID [CA]
  • [A] EP 0220522 A1 19870506 - HOECHST AG [DE]
  • [AD] FR 1194778 A 19591112 - UNION CARBIDE CORP
  • [A] FR 2280710 A1 19760227 - UNIROYAL INC [US]
  • [A] EP 0164592 A1 19851218 - SUEDDEUTSCHE KALKSTICKSTOFF [DE], et al
  • [A] PATENT ABSTRACTS OF JAPAN vol. 4, no. 46 (C-006)10 Avril 1980 & JP-A-55 018 527 ( IBIDEN CO., LTD ) 8 Février 1980
  • [A] PATENT ABSTRACTS OF JAPAN vol. 14, no. 417 (C-756)10 Septembre 1990 & JP-A-2 160 658 ( MITSUBISHI MINING & CEMENT CO. ) 20 Juin 1990
  • [A] PATENT ABSTRACTS OF JAPAN vol. 3, no. 147 (C-066)5 Décembre 1979 & JP-A-54 125 116 ( TOYO SODA MFG CO., LTD ) 28 Septembre 1979
  • [A] PATENT ABSTRACTS OF JAPAN vol. 7, no. 281 (C-200)15 Décembre 1983 & JP-A-58 161 717 ( DENKI KAGAKU KOGYO K.K. ) 26 Septembre 1983
  • [A] PATENT ABSTRACTS OF JAPAN vol. 9, no. 5 (C-260)10 Janvier 1985 & JP-A-59 159 909 ( YAHASHI KOGYO K.K. ) 10 Septembre 1984

Designated contracting state (EPC)

AT BE CH DE ES FR GB IT LI LU SE

DOCDB simple family (publication)

EP 0511121 A1 19921028; EP 0511121 B1 19960911; AT E142705 T1 19960915; DE 69213541 D1 19961017; DE 69213541 T2 19970130; ES 2091429 T3 19961101; US 5242480 A 19930907

DOCDB simple family (application)

EP 92420097 A 19920331; AT 92420097 T 19920331; DE 69213541 T 19920331; ES 92420097 T 19920331; US 86252792 A 19920402