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Machine translation
1. (WO1980000831) A METHOD OF RECOVERING CALCIUM AND SULPHUR COMPOUNDS FROM A METALLURGICAL WASTE MATERIAL
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1980/000831    International Application No.:    PCT/SE1979/000200
Publication Date: 01.05.1980 International Filing Date: 04.10.1979
IPC:
C01B 17/16 (2006.01), C01F 11/02 (2006.01), C01F 11/10 (2006.01)
Applicants:
Inventors:
Priority Data:
7810633 11.10.1978 SE
Title (EN) A METHOD OF RECOVERING CALCIUM AND SULPHUR COMPOUNDS FROM A METALLURGICAL WASTE MATERIAL
(FR) METHODE DE RECUPERATION DES COMPOSES DE CALCIUM ET DE SOUFRE A PARTIR D"UN MATERIAU METALLURGIQUE DE REBUT
Abstract: front page image
(EN)A pulverulent waste material containing CaO and CaS is suspended in water (4), and H2S is subsequently added (9), resulting in CaO and CaS being dissolved, forming Ca(SH)2. H2S is driven off in a first step (11) in a quantity required for said dissolution. In a second step (26) H2S is driven off while Ca precipitates as Ca(OH)2 or CaCO3, which are removed by filtration (36). The excess quantity of H2S is withdrawn (32) for some suitable purpose.
(FR)Un materiau de rebut pulverulent contenant du CaO et du CaS est place en suspension dans de l"eau (4), et on y ajoute (9) ulterieurement H2S, provoquant ainsi la dissolution de CaO et de CaS, formant Ca(S H)2. H2S est chasse dans une premiere etape (11) en une quantite ne a cette dissolution. Dans une seconde etape (26) H2S est chasse tandis que Ca precipite sous-forme de Ca(OH)2 ou CaCO3, qui sont retires par filtration (36). La quantite en exces de H2S est recueillie (32) en vue d"une utilisation appropriee.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)