BE349324A - - Google Patents
Info
- Publication number
- BE349324A BE349324A BE349324DA BE349324A BE 349324 A BE349324 A BE 349324A BE 349324D A BE349324D A BE 349324DA BE 349324 A BE349324 A BE 349324A
- Authority
- BE
- Belgium
- Prior art keywords
- phosphorus
- slag
- furnace
- cao
- iron
- Prior art date
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 16
- 229910052698 phosphorus Inorganic materials 0.000 claims description 12
- 239000002893 slag Substances 0.000 claims description 12
- OAICVXFJPJFONN-UHFFFAOYSA-N phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 11
- 239000011574 phosphorus Substances 0.000 claims description 11
- PNEYBMLMFCGWSK-UHFFFAOYSA-N AI2O3 Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 9
- 235000012239 silicon dioxide Nutrition 0.000 claims description 9
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium monoxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 8
- 229910052742 iron Inorganic materials 0.000 claims description 8
- 239000004568 cement Substances 0.000 claims description 6
- 235000021317 phosphate Nutrition 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 229910001570 bauxite Inorganic materials 0.000 claims description 5
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 4
- 235000015450 Tilia cordata Nutrition 0.000 claims description 4
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 4
- 229910052593 corundum Inorganic materials 0.000 claims description 4
- 239000004571 lime Substances 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 4
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-K [O-]P([O-])([O-])=O Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 229910052681 coesite Inorganic materials 0.000 claims description 3
- 229910052906 cristobalite Inorganic materials 0.000 claims description 3
- 238000005755 formation reaction Methods 0.000 claims description 3
- 230000004927 fusion Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 239000010452 phosphate Substances 0.000 claims description 3
- 150000003013 phosphoric acid derivatives Chemical class 0.000 claims description 3
- 229910052904 quartz Inorganic materials 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 229910052682 stishovite Inorganic materials 0.000 claims description 3
- 229910052905 tridymite Inorganic materials 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000003610 charcoal Substances 0.000 claims 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N Silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 6
- VAKIVKMUBMZANL-UHFFFAOYSA-N Iron phosphide Chemical compound P.[Fe].[Fe].[Fe] VAKIVKMUBMZANL-UHFFFAOYSA-N 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 241000722270 Regulus Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000002829 reduced Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/32—Aluminous cements
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
<Desc/Clms Page number 1>
Procédé pour la préparation de phosphore et de ciment alumineux
Dans le procédé visant à obtenir, par fusion de phosphates bruts avec au charbon et des minéraux contenant de l'alumine ( à la place d'acide silicique ) directement du phosphore et une scorie possédant les propriétés précieuses d'un ciment alumineux ( ciment de fusion ) on est limité dans le choix des matières premières* On peut bien, pour obtenir dans la scorie la faible teneur nécessaire en acide silicique, partir de matières premières pauvres en acide silicique et employer donc en particulier des bauxites pauvres en acide silicique, qui sont toutefois toujours assez riches en fer.
Ceci entrai- ne cepandant à coté de l'avantage du faible prix d'achat en comparaison des bauxites pauvres en fer, l'inconvénient consi- dérable que lors du traitement dans le four à phosphore ces bauxites occasionnent, à cause de la teneur élevée en oxyde
<Desc/Clms Page number 2>
. de fer, la formation de phosphure de fer et par conséquent des pertes considérables en phosphore à obtenir directement. On ob- serve par exemple en cas d'emploi d'une bauxite à 20% de
Fe2O3 qu'au moins 15% du phosphore se pgrdent en phosphure de fer,.
On a trouvé maintenant qu'il est possible de tirer parti des avantages de la matière première peu coûteuse, sans sup- porter les inconvénients de la perte de phosphore, en opérant de telle façon que par une fusion réductrice de bauxites à forte teneur en oxyde de fer avec de la chaux, dans les limites d'environ 70-90 parties de Al2O3 pour 30-10 parties de CaO, on produit une scorie qui fond avec une facilité relative, nui se forme très facilement et se présente presque exempte de fer vu que le fer est séparé de façon pratiquement complète à l'état de régule, cette préparation d'une scorie à forte teneur en alumine, ayant la composition mentionnée, ne constitue pas en elle- même l'objet de la présente invention ;
celui-ci ré- side uniquement dans l'emploi de cette scorie L point de fu- sion relativement bas, peu près exempte de fer, à la place de l' acide silicique usuel autrement, ou de la bauxite comme substance se combinant la chaux lors de la fabrication de phosphore partir de phosphates naturels. On obtient de cette; manière dans le four phosphore ( four électrique ou four cuve) sans perte de phosphore @ par formation de phosphure de fer, une scorie pauvre en acide silicique, scorie qui, moyennant le réglage des proportions de phosphate, et de scorie d'addition en vue de l'obtention d'un ciment alu- mineux, fournit un produit ayant des propriétés hydrauliques avantageuses.
Exemple
On fond dans un four électrique de la bauxite à 65% de
Al2O3, 30% de Fe2O3 et 2% de SiO2 avec de la chaux cuite et du cahrbon dans le rap[port de 100 : 17: 10. La scorie extraite
<Desc/Clms Page number 3>
<Desc / Clms Page number 1>
Process for the preparation of phosphorus and aluminous cement
In the process aimed at obtaining, by fusion of crude phosphates with coal and minerals containing alumina (instead of silicic acid) directly phosphorus and a slag having the valuable properties of an aluminous cement (cement of fusion) we are limited in the choice of raw materials * In order to obtain the necessary low silicic acid content in the slag, it is possible to start from raw materials poor in silicic acid and therefore use in particular bauxites poor in silicic acid, which are however still quite rich in iron.
However, besides the advantage of the low purchase price in comparison with low iron bauxites, this entails the considerable disadvantage that during the treatment in the phosphorus furnace these bauxites cause, due to the high content. in oxide
<Desc / Clms Page number 2>
. of iron, the formation of iron phosphide and consequently considerable losses of phosphorus to be obtained directly. We observe, for example, when using a bauxite at 20% of
Fe2O3 that at least 15% of the phosphorus is converted into iron phosphide ,.
It has now been found that it is possible to take advantage of the advantages of the inexpensive raw material, without bearing the disadvantages of the loss of phosphorus, by operating in such a way that by a reductive melting of bauxites with a high oxide content of iron with lime, within the limits of about 70-90 parts of Al2O3 per 30-10 parts of CaO, a slag is produced which melts with relative ease, is formed very easily and is almost free of iron since the iron is almost completely separated in the regulus state, this preparation of a high alumina slag having the mentioned composition does not in itself constitute the object of the present invention;
this resides only in the employment of this slag L relatively low melting point, almost free of iron, in place of the otherwise usual silicic acid, or of bauxite as the lime-combining substance when manufacturing phosphorus from natural phosphates. We get from this; manner in the phosphorus furnace (electric furnace or tank furnace) without loss of phosphorus @ by formation of iron phosphide, a slag poor in silicic acid, slag which, by adjusting the proportions of phosphate, and of addition slag in view of obtaining an alumina cement, provides a product having advantageous hydraulic properties.
Example
We melt in an electric furnace bauxite at 65% of
Al2O3, 30% Fe2O3 and 2% SiO2 with baked lime and cahrbon in the ratio [port of 100: 17: 10. The slag extracted
<Desc / Clms Page number 3>
Claims (1)
Publications (1)
Publication Number | Publication Date |
---|---|
BE349324A true BE349324A (en) |
Family
ID=24656
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE349324D BE349324A (en) |
Country Status (1)
Country | Link |
---|---|
BE (1) | BE349324A (en) |
-
0
- BE BE349324D patent/BE349324A/fr unknown
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN110438358A (en) | A kind of composite modifier and preparation method for hypereutectic al-si copper alloy | |
BE349324A (en) | ||
FR2769308A1 (en) | Aqueous alkaline aluminum polysulfate composition | |
CN110438375A (en) | A kind of alterant and preparation method thereof for hypereutectic al-si copper alloy | |
BE1012243A6 (en) | Residual granite sawing sludge processing method, refractory material production method and materials obtained in this way | |
BE390201A (en) | ||
BE541058A (en) | ||
US837918A (en) | Process for manufacturing cement from blast-furnace slag. | |
BE352520A (en) | ||
BE331436A (en) | ||
BE341166A (en) | ||
BE395866A (en) | ||
BE497530A (en) | ||
US1203338A (en) | Composition for brake-band linings. | |
FR2471236A1 (en) | Flux for continuous casting of steel - consists of refractory metal oxide, fluxing agent, and cellulosic material | |
BE340460A (en) | ||
CH285853A (en) | Process for the manufacture of gray cast iron parts with high mechanical resistance and part obtained by this process. | |
CH129818A (en) | New cement and process for its preparation. | |
BE419112A (en) | ||
BE446148A (en) | ||
BE515396A (en) | ||
BE357560A (en) | ||
FR2640960A1 (en) | ||
BE521293A (en) | ||
BE401106A (en) |