LU85867A1 - PROCESS FOR TREATING METALLURGICAL DAIRY FOR THE MANUFACTURE OF CEMENT AND PRODUCTS OBTAINED BY THE IMPLEMENTATION OF THIS PROCESS - Google Patents

Description

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^ w-wiiCe D: T - “k! | '"• Z —-- * î-î-i ^ c * - i" ** "*” / ”-> - - - Uw-!“ Ce d / n.: R & D? LAI ...... ............... i Designation of the inventor (1) The undersigned _______________ ^ sz,: ng. cars ...... er, .... prr-pr. .... Inâ ^., .....

acting in g rallé âé / $ | p £ s'at} i - this agent cA coexisting - £ 2 '. ? AUL iOCRCH S.A.

. ..... 32., .. rue d'Alsace ____________________________; _____________________ __________________________________ T - -> ”1 --- (3) this invention concerning:

Process of tarant tar: of irétallurgigue slag ... in sight ... âe ... iâ __________ ... fartr-carier: de. cement and ... p.roduct.s ..... obcerus. ra ~ - -la- irise-et; -oeuvre Q6r CS C 'CO CS CS * indicates as irwerueuns}: 1. Name and first names ____________ "2 £.? A®. * Âà' .. i ... étarc. .................................................. ...................

Address ... 5..6., .... r.D.ut £ ... des ..2. Casings ............. - ..... EHLAtAE -.- s / iiESS .......... .....

2. Last and first names ___________Aersieur .rA --- it-r cem________________________________________________________________________

Address ... 10 / .... rue de Scrrirshaussr ____________________________ BERELDAEGl ..................................

2. Surname and first names .......... ........ ........................... ..............................................— \ l säume -a sincerity of the aforementioned incicaiions s: cec-a * e er ass-me "'' full responsibility.

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i ^ 2 iL i. * J - v 'ν' XjIVJ. X '\ j £ \ ί' 32 rue c'Alsace

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at ! "Process for the treatment of: i: = r! Metallurgical er view of the fabricaticr. Of errent, and I products obtained ter the implementation and this trocéüé" ί i __ _______ _ ___________ j ~~ in view es the manufacture of ernenn and proaiuts: obtained by staking. The present invention relates to a process for treating metallurgical slag for the manufacture of cement. The invention also relates to a new clinker obtained by the implementation of this IC. The manufacture of the cement plant clir.ker was now carried out by baking a mixture of products in this rotary oven in this case, of if-; ! lice and alumina followed by a cracking of the product thus i j obtained. Certain cements, in particular so-called 'Fortland' cements, may contain up to 100% of such a clinker. !

If these types of cements have excellent pro-j i i! hvdrauliaues and statiaues, they nevertheless smile: i! less has the disadvantage had their manufacture is relative! j 20 tiveinent expensive because of the high energy consumption these ovens this c..isson.

1 Other known cement has no co-existence; that a certain proper hold your clinker, the rest being. constitutes by what _l appeu ^ e ^ .a enarre or res secondary constituents, te. * se had rare stirs the ashes which can come from this power stations.

Activating products made up of clinker, the charge We know, in fact, that unlike c other cons- * of a binding material to react to: ocur water *.

form a coherent and stable mass c1 hydrates which,; thereafter, is insensitive to the action of water.

However, since granulated slag, this 5 blast furnace still requires some | quantity of clinker so that the cement has the required qualities, the high cost of manufacturing the ciinxer is always dying, what is the cost of cement in blast furnaces.

The object of the present invention is one; new process for preparing a material which has a composition and qualities comparable to those of classic clinker or known cements, but the cost price of which is appreciably lower

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j 15 laughing. ; J Fear of achieving this objective, the process according to j | the invention is characterized in that gold adds to j I a bath this liquid slag, set with an oven, i | tank, an activating product based on calcium! | 20 wear the melee thus obtained with total fusion! "And in that the mixture is made to flow liquid granulation, drying and grinding.

The amount of activating products to add i. , - ..........

varies according to the composition of the „aiier„ rotates and ·; 25 will be determined according to the desired count, of the final product. We can in particular assay the 5 Quii sctrvcini of ne2. ι.θ- rnsnière. err3 S3T cddltlor.

i 30 or that of high f curr. cements ux. the product i intrinsic ssr.e qei‘tes vs.ls.ries ir.eis ceuerslere ^ t * I insufficient ocur movoir be used as in! cement plant, the present invention makes it possible to obtain j wax by a completely different process. In

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I indeed, the present invention uses the raétal- slag! j 5 lurgiaue as a raw material, it is "enriched" t! by an inexpensive activating product until it is obtained! it is a product before a cer.pos itior. analogous to or equal to i i to that of clinker. The great advantage is that one; I _ ^ (IC classic and that we re-fite, in the ocntraire, of the 1 heat of the slag in fuseon at the exit of the oven.

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temperature of the molten slag to bring it up and keep it piercing at the necessary time at temperature. 15 desired, it being variable according to the composition i • t! ' of the product. ; The invention will be described in more detail below; below, with reference to these examples and to the diagram • ce r scr r cai-ror appendix * r

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main ”expressed er. to cer. t: acre * i 1 un. LGir this. , blast furnaces, a "lortland" clinker and a blast furnace cement type BF35.

- i? I; ; ! CaO * 4C .5; 6 € r 5 i 4é, £ X’CiC Γ - t _ _. · 3 '"· z * ~ C1 o *' zi, * 23 ï f -. - -; - ·> - of CaO ;. we get a three =” eo the cor te s here or next: 't' · ~ * Γ- * Ό S i Cu: 2 'r ^ t; dir} · -er. The eua ^ ite this CaO to be added has been calculated 1 ** "" - j in order to obtain the CaO content of ciinker because |! the CaO content is decisive for the properties:! ". c V'd *" ”'1 ir'iiac' ^„ i: Instead of adding CaG, we. moves really! -: use CaCC ~. Often, you must then use 1; 40 kg per κιîo ae _ailier iiçuise. This enaux can be extracted from revotes r.citureixes Or oc 10 industrial waste tempt.ait CaC in free or combined form. St lut uses CaC% - ^ decarbonation can be carried out before introduction into the! ”; 1 if _i * we want ootemr a trotuit are your coir · - I 15 position corresponds substantially to that of a cement j of type ΞΓ 35, it is necessary to add C, 12 kg this CaO had ji 0.21 kg of CaCG, for every kilo of liquid slag. d ~ 1

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CaC: 46.6 2 G McfO z g jr * 1

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t s! implementation of the proposed method rar 11 invention. The ref-! 25 rence IG schematically represents a bag used to bring the necessary quantities of liquid slag 1 cooling, and granulation e er. t done ‘! ... ..... - -! • also rapiaeient eue pcssir.e anr. what is it *? retains its hydraulic properties. The filtration system i which follows the granulation will preferably be a rotary drum installation of the type i of that proposed by patent FR-A-78 19862. '! * (7. * ~ ^ ~ 5 v ^ s * ξ 01 ^ raised ci 3. ή. S X s * - [station oa filtration est. Ser-nré eu nrufuit: ranule f in the darling of sucker l £, ? j 10 T £ „ro, .. ^ U = _ ÂI = .._ £ 4arc 11T,!” oven 22 for drying and grinding before being processed ί

1 fairy in a packing station. As shown J

; rar the reference 20, the smoke fired in the i 1 oven 12 r in particular the CG „forné rsr the decarbonation * ^ i 15 of CaCG ^ can be recovered and sent in the; i s drying oven 22. Reference 24 indicates that these fumes can also be used to heat the CaCG.

: If we consider the heat balance, we note that the preparation of a ton of clinker by the implementation of the process according to the invention consumes 6 32 therms then raw 85C hernia is necessary * i: in the classical processes, which constitutes a * Ciâln Bcc 02TU U UCTI26: Qtr "-UU" ί i Οζ • Π -, - "· '-" * - --------- +.

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Claims (1)

- 6 - £ v f. L V - i \ U ± U - 1 U jl * b [____ * d 1. - This metallurgical slag treatment process for the manufacture of cement, charac- I | 5 terized in that this liquid slag j, added to a bath, at the outlet of a shaft oven, a product / “* 4— 4 T ▼ - 'T-' Ä ►- - -. -. r-n 0-m 4 - - T-r-, τγ 1 -¾, -, t t. -v *> - <àx, * »T f ~>, doui V Ci- i w. - / - CO- s-w. 1. -U U- you. w -! 1 J mixed amsr obtained with total rusion and in that one | | subjects the mixing agent to a liquid tranulaticn, an I "1. drying and grinding.; u. - Procece seron ta revencrcation u, 1 characterized in that the activating product is CaO. | 3. - Process according to claim 1, i | characterized in that the activating product is CaCO ^. i! 15 4. - Product obtained by the implementation!! * i; of any one of claims x to 3.; V · * * Γ! t