BE605643A - - Google Patents
Info
- Publication number
- BE605643A BE605643A BE605643DA BE605643A BE 605643 A BE605643 A BE 605643A BE 605643D A BE605643D A BE 605643DA BE 605643 A BE605643 A BE 605643A
- Authority
- BE
- Belgium
- Prior art keywords
- agglomerating agent
- carbon dioxide
- slag
- weight
- atmosphere
- Prior art date
Links
- 239000002893 slag Substances 0.000 claims description 17
- 239000008187 granular material Substances 0.000 claims description 11
- CURLTUGMZLYLDI-UHFFFAOYSA-N carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 9
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 239000001569 carbon dioxide Substances 0.000 claims description 7
- 239000003337 fertilizer Substances 0.000 claims description 6
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L MgCl2 Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims description 4
- FGIUAXJPYTZDNR-UHFFFAOYSA-N Potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 claims description 4
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium monoxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 4
- PRKQVKDSMLBJBJ-UHFFFAOYSA-N Ammonium carbonate Chemical compound N.N.OC(O)=O PRKQVKDSMLBJBJ-UHFFFAOYSA-N 0.000 claims description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate dianion Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 2
- -1 NH4No3 Substances 0.000 claims description 2
- 239000004115 Sodium Silicate Substances 0.000 claims description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N Sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 2
- 229920002472 Starch Polymers 0.000 claims description 2
- 239000001099 ammonium carbonate Substances 0.000 claims description 2
- 235000012501 ammonium carbonate Nutrition 0.000 claims description 2
- 239000001110 calcium chloride Substances 0.000 claims description 2
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 2
- 235000011148 calcium chloride Nutrition 0.000 claims description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 2
- 150000004676 glycans Polymers 0.000 claims description 2
- 229910001629 magnesium chloride Inorganic materials 0.000 claims description 2
- 150000002823 nitrates Chemical class 0.000 claims description 2
- 229920001282 polysaccharide Polymers 0.000 claims description 2
- 239000005017 polysaccharide Substances 0.000 claims description 2
- 150000004804 polysaccharides Polymers 0.000 claims description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 2
- 229910052700 potassium Inorganic materials 0.000 claims description 2
- 239000011591 potassium Substances 0.000 claims description 2
- 235000010333 potassium nitrate Nutrition 0.000 claims description 2
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 2
- 235000019698 starch Nutrition 0.000 claims description 2
- 239000008107 starch Substances 0.000 claims description 2
- 239000011780 sodium chloride Substances 0.000 claims 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims 2
- 210000004080 Milk Anatomy 0.000 claims 1
- 229910001514 alkali metal chloride Inorganic materials 0.000 claims 1
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
- 235000013336 milk Nutrition 0.000 claims 1
- 239000008267 milk Substances 0.000 claims 1
- 150000003839 salts Chemical class 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- UIIMBOGNXHQVGW-UHFFFAOYSA-M NaHCO3 Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- ABLZXFCXXLZCGV-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)=O ABLZXFCXXLZCGV-UHFFFAOYSA-N 0.000 description 2
- DVARTQFDIMZBAA-UHFFFAOYSA-O Ammonium nitrate Chemical compound [NH4+].[O-][N+]([O-])=O DVARTQFDIMZBAA-UHFFFAOYSA-O 0.000 description 1
- 240000007524 Camellia sinensis var. sinensis Species 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 101710040442 LTBR Proteins 0.000 description 1
- 235000015450 Tilia cordata Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K [O-]P([O-])([O-])=O Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 210000000056 organs Anatomy 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B19/00—Granulation or pelletisation of phosphatic fertilisers, other than slag
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Fertilizers (AREA)
Description
<Desc/Clms Page number 1>
EMI1.1
"Procédé pour la fabràcation d=tnr3,s soxs :Ëor de granules". la. présente invention est relative à un procède de fa- brication d'engrais granulés à partir de scories Thomas.
EMI1.2
Isi, méthode biea connue et classique dautüiss,t3a sous òrne pulvérulente et comme engrais des scories provenant de l'affinage des fontes phosphoreuses présente divers inconvénients
EMI1.3
parmi lesquels il farnt mtaPet citer la forte hTgxoscopicité de la scorie en poudre et les difìcult&6 de aou 6pandage. Ce deJ:nier inconvénient est partic:u1ièrsem >portant 3rsque l'on utilise des moyens mécaniques poer zdaliàer cet épa dage, la poussière de scorie ayant tea"ce 1. s'introdaite dans les organm lI!C&Diques des &P1*t'eils.
' Bottt ttEâ3er, ces inconvénients, on connaît divers procèdes tendit à obtenir la scorie commerciale sous forme de gra-
<Desc/Clms Page number 2>
nules soit directement, soit à partir de scorie préalablement moulue,
Différentes méthodes ont déjà été préconisées à cet effet, notamment celles qui consistent à granuler la scorie en mé- lange avec des proportions relativement importantes d'autres engrais.
L'inconvénient est que la teneur des granules en phosphate devient alors assez faible.
Dans d'autres procédés essayés pour agglomérer la pous- sière de scorie, la solubilité des granules dans l'acide citrique de- vient insuffisante. D'autres méthodes enfin conduisent à des granules qui se dissolvent trop lentement au contact de l'humidité du sol. la présente invention a pour objet un procédé permettant d'éviter ces inconvénients.
Le procédé objet de la présente invention est essentiel- lement caractérisé en ce que l'on Mélange la scorie finement moulue provenant de l'affilage de fonte phosphoreuse avec une quantité d'eau comprise entre 10 et 20 % et de préféxance entre 14 % et 18 % en poids de la scorie sèche, la dite eau contenant en solution un agent agglomérant à raison de 3 % au plus du poids de scorie sèche, en ce qu'on sounet ensuite le dit mélange à une granulation de façon à ob- tente des grains d'un diamètre compris entre 0,3 mm et 5 mm et de préférence entre 0,3 mm et 3 mm et en ce que les grains ainsi obte- nus sont séchés dans une atmosphère contenant essentiellement de l'anhydride carbonique.
Il a été remarqué que les granules séchés obtenus par ce procédé présentaient , grâce à la .formation superficielle d'un carbonate, une dureté et une résistance aux agents atmosphériques nettement supérieures à celles des granules obtenus par les autres méthodes, tout en conservant une très bonne solubilité dans l'acide cittique.
Comte agent agglomérant, on peut utiliser par exemple des chiorures alcali= tels que du. MaCl ou du XC1; des engrais pe- tassiques, des nitrates tels que du KNO3 ou du NH4NO3, de l'amidon, des polysaccharides, des oxydes tels que le CaO ou le MgO et/ou du silicate de soude.
.../...
<Desc/Clms Page number 3>
Toutefois, des résultats spécialement intéressants ont été obtenus en utilisant comme agglomérant du chlorure alcalino- terreux tel que du CaCl2 ou du MgCl2.
Suivant une variante avam ageuse du procédé de l'inven- tion, la quantité de produit agglomérant utilisé pour la fabrication des granules sera avautageusement limitée à 1 % au plus du poids de scorie sèche.
Il a été également trouvé intéressant de réaliser l'atmosphère d'anhydride carbonique pour le séchage uniquement dans le voisinage immédiat des granules, par exemple en mélangeant ceux-ci avec des agents réagissant avec la chaux libre, pour donner de l'anhydride carbonique, tels que par exemple du bicarbonate de soude ou de préférence du carbonate ammonique.
Toutefois, la réalisation simultanée de l'atmosphère d'anhydride carbonique dans le voisinage immédiat des granules et dans l'enceinte de séchage, ne sort pas du cadre de l'invention.
REVENDICATIONS.
1.- Procédé de fabrication d'engrais sous forme de granules à partir de scories Thomas, caractérisé en ce que 1'on mélange la scorie finement moulue avec une quantité d'eau comprise entre 10 % et 20 % et de préférence comprise entre 14 % et 18 % en poids de la scorie sèche, la dite eau contenant en solution un agent agglomérant à raison de 3 % au plus du poids de la scorie sèche, en. ce qu'on soumet ensuite le mélange ainsi fore à une granulation de façon à obtenir des grains d'un diamètre compris entre 0,3 @ et 5 et de préférence entre 0,3 @ et 3 @ et en ce que les grains ainsi obtenus sont séchés dans une atmosphère contenant essentiellement de l'anhydride carbonique.
<Desc / Clms Page number 1>
EMI1.1
"Process for the manufacture of tnr3, s soxs: gold granules". the. The present invention relates to a process for manufacturing granulated fertilizers from Thomas slag.
EMI1.2
Isi, a known and classic biea method of autüiss, t3a in powdered carbon and as a fertilizer of the slag obtained from the refining of phosphorous iron presents various disadvantages
EMI1.3
among which it is possible to mention the high intensity of the powdered slag and the difficulties of application or application. This deJ: deny drawback is partic: u1ièrsem> bearing 3 when one uses mechanical means to poer zdaliàer this shoulder, the slag dust having tea "this 1. is introduced into the organs! C & Diques des & P1 * t'eils .
'Bottt ttEâ3er, these drawbacks, we know various procedures tended to obtain the commercial slag in the form of gra-
<Desc / Clms Page number 2>
nules either directly or from previously ground slag,
Various methods have already been recommended for this purpose, in particular those which consist in granulating the slag as a mixture with relatively large proportions of other fertilizers.
The drawback is that the phosphate content of the granules then becomes quite low.
In other methods tried to agglomerate slag dust, the solubility of the granules in citric acid becomes insufficient. Finally, other methods lead to granules which dissolve too slowly on contact with soil moisture. The present invention relates to a method making it possible to avoid these drawbacks.
The process which is the subject of the present invention is essentially characterized in that the finely ground slag obtained from the sharpening of phosphorous iron is mixed with a quantity of water of between 10 and 20% and preferably between 14% and 18% by weight of the dry slag, the said water containing in solution an agglomerating agent in an amount of 3% at most of the weight of dry slag, in that the said mixture is then subjected to a granulation so as to obtain grains with a diameter of between 0.3 mm and 5 mm and preferably between 0.3 mm and 3 mm and in that the grains thus obtained are dried in an atmosphere essentially containing carbon dioxide.
It was noticed that the dried granules obtained by this process exhibited, thanks to the surface formation of a carbonate, a hardness and a resistance to atmospheric agents clearly superior to those of the granules obtained by the other methods, while retaining a very good solubility in cittic acid.
Comte agglomerating agent, one can use for example alkali chiorides = such as. MaCl or XC1; potassium fertilizers, nitrates such as KNO3 or NH4NO3, starch, polysaccharides, oxides such as CaO or MgO and / or sodium silicate.
... / ...
<Desc / Clms Page number 3>
However, especially interesting results have been obtained using alkaline earth chloride such as CaCl2 or MgCl2 as the binder.
According to an avam ageuse variant of the process of the invention, the quantity of agglomerating product used for the manufacture of the granules will be advantageously limited to 1% at most of the weight of dry slag.
It has also been found advantageous to achieve the carbon dioxide atmosphere for drying only in the immediate vicinity of the granules, for example by mixing the latter with agents reacting with free lime, to give carbon dioxide, such as, for example, sodium bicarbonate or preferably ammonium carbonate.
However, the simultaneous production of the carbon dioxide atmosphere in the immediate vicinity of the granules and in the drying chamber does not depart from the scope of the invention.
CLAIMS.
1.- Process for manufacturing fertilizer in the form of granules from Thomas slag, characterized in that the finely ground slag is mixed with an amount of water of between 10% and 20% and preferably between 14 % and 18% by weight of the dry slag, said water containing in solution an agglomerating agent in an amount of 3% at most of the weight of the dry slag, in. which is then subjected the mixture thus drilled to a granulation so as to obtain grains with a diameter between 0.3 @ and 5 and preferably between 0.3 @ and 3 @ and in that the grains thus obtained are dried in an atmosphere containing essentially carbon dioxide.
Claims (1)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE605643A true BE605643A (en) |
Family
ID=192836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE605643D BE605643A (en) |
Country Status (1)
| Country | Link |
|---|---|
| BE (1) | BE605643A (en) |
-
0
- BE BE605643D patent/BE605643A/fr unknown
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