ES2316283A1 - Procedure for the manufacture of granulated ferrous sulphate as an additive for cementers (Machine-translation by Google Translate, not legally binding) - Google Patents
Procedure for the manufacture of granulated ferrous sulphate as an additive for cementers (Machine-translation by Google Translate, not legally binding) Download PDFInfo
- Publication number
- ES2316283A1 ES2316283A1 ES200701497A ES200701497A ES2316283A1 ES 2316283 A1 ES2316283 A1 ES 2316283A1 ES 200701497 A ES200701497 A ES 200701497A ES 200701497 A ES200701497 A ES 200701497A ES 2316283 A1 ES2316283 A1 ES 2316283A1
- Authority
- ES
- Spain
- Prior art keywords
- additive
- procedure
- translation
- granulated
- manufacture
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000000654 additive Substances 0.000 title claims abstract description 16
- 230000000996 additive effect Effects 0.000 title claims abstract description 15
- 235000003891 ferrous sulphate Nutrition 0.000 title abstract description 8
- 239000011790 ferrous sulphate Substances 0.000 title abstract description 8
- 238000004519 manufacturing process Methods 0.000 title abstract description 5
- 239000004568 cement Substances 0.000 claims abstract description 11
- SURQXAFEQWPFPV-UHFFFAOYSA-L iron(2+) sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Fe+2].[O-]S([O-])(=O)=O SURQXAFEQWPFPV-UHFFFAOYSA-L 0.000 claims abstract description 10
- 239000008187 granular material Substances 0.000 claims abstract description 9
- 238000001035 drying Methods 0.000 claims abstract description 5
- 238000005469 granulation Methods 0.000 claims abstract description 5
- 230000003179 granulation Effects 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims abstract description 5
- 238000002360 preparation method Methods 0.000 claims abstract description 4
- 238000000265 homogenisation Methods 0.000 claims abstract description 3
- 239000000843 powder Substances 0.000 claims abstract description 3
- 230000003750 conditioning effect Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 230000002829 reductive effect Effects 0.000 claims 1
- 238000001816 cooling Methods 0.000 abstract description 3
- 238000002156 mixing Methods 0.000 abstract 1
- 239000011651 chromium Substances 0.000 description 8
- 239000000047 product Substances 0.000 description 7
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 6
- 239000012467 final product Substances 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 239000001692 EU approved anti-caking agent Substances 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 206010040880 Skin irritation Diseases 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 230000036556 skin irritation Effects 0.000 description 1
- 231100000475 skin irritation Toxicity 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000004408 titanium dioxide 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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/08—Acids or salts thereof
- C04B22/14—Acids or salts thereof containing sulfur in the anion, e.g. sulfides
- C04B22/142—Sulfates
- C04B22/149—Iron-sulfates
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/02—Agglomerated materials, e.g. artificial aggregates
-
- 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
- C04B40/0042—Powdery mixtures
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Glanulating (AREA)
Abstract
Description
Procedimiento de fabricación de sulfato ferroso granulado como aditivo para cementeras.Ferrous Sulfate Manufacturing Procedure granulated as cement additive.
La presente invención se refiere a un nuevo procedimiento para la preparación de un aditivo reductor para su utilización en cementeras y a dicho aditivo reductor granulado obtenido mediante dicho procedimiento.The present invention relates to a new procedure for the preparation of a reducing additive for its use in cement and said granular reducing additive obtained by said procedure.
El aditivo reductor comprende sulfato ferroso y se utiliza para reducir el contenido de Cr(VI) a Cr(III) del cemento.The reducing additive comprises ferrous sulfate and It is used to reduce the content of Cr (VI) to Cr (III) of the cement.
El cromo (VI) presente en los cementos puede provocar irritaciones en la piel, por lo que la comunidad europea obliga a los productores de cemento a que el contenido máximo en el producto final sea de 2 ppm en Cr (VI). Para reducir por tanto el contenido en Cr (VI) es conocido en el estado de la técnica el empleo del sulfato ferroso en la reducción química de Cr (VI) a Cr(III) el cual no es irritante.The chromium (VI) present in cements can cause skin irritations, so the European community forces cement producers to have the maximum content in the final product is 2 ppm in Cr (VI). To reduce therefore the Cr (VI) content is known in the state of the art the use of ferrous sulfate in the chemical reduction of Cr (VI) a Cr (III) which is not irritating.
La presente invención proporciona en un aspecto un procedimiento para la preparación de un aditivo reductor para su utilización en cementeras, en adelante procedimiento de la invención.The present invention provides in one aspect a process for the preparation of a reducing additive for its use in cement plants, hereinafter procedure of the invention.
El aditivo reductor que se obtiene a partir del procedimiento de la invención se obtiene en forma de granulado, y comprende sulfato ferroso que se utiliza para reducir el contenido de Cr(VI) a Cr(III) del cemento.The reducing additive that is obtained from procedure of the invention is obtained in the form of granules, and comprises ferrous sulfate that is used to reduce the content from Cr (VI) to Cr (III) of the cement.
El procedimiento de la invención comprende las etapas de:The process of the invention comprises the stages of:
- (i)(i)
- dosificar y mezclar sulfato ferroso heptahidratado con un regulador de pH en forma de polvo;dose and mix ferrous sulfate heptahydrate with a pH regulator in powder form;
- (ii)(ii)
- homogeneización y granulación de la mezcla;homogenization and granulation of the mixture;
- (iii)(iii)
- secado del granulado obtenido en la etapa (ii); ydrying of the granulate obtained in step (ii); Y
- (iv)(iv)
- enfriado del granulado.cooled of the granulate.
\vskip1.000000\baselineskip\ vskip1.000000 \ baselineskip
La principal materia prima utilizada en el
procedimiento de la invención es el sulfato ferroso heptahidratado
(cristales) procedente del proceso productivo de la producción de
dióxido de titanio. Estos cristales de sulfato ferroso con siete
moléculas de agua se dosifican en una concentración entre el 90 y el
100% con respecto al producto
final.The main raw material used in the process of the invention is ferrous sulfate heptahydrate (crystals) from the production process of the production of titanium dioxide. These ferrous sulfate crystals with seven water molecules are dosed at a concentration between 90 and 100% with respect to the product
final.
El resto de aditivos necesarios para la aglomeración son reguladores de pH en base a calcio. Su concentración oscila entre el 0 y 10%.The rest of additives necessary for the agglomeration are pH regulators based on calcium. its concentration ranges between 0 and 10%.
El procedimiento se lleva a cabo en un equipo de granulación. En este equipo se le adiciona tanto agua como otros reguladores de pH en forma líquida.The procedure is carried out in a team of granulation. In this equipment is added as much water as others pH regulators in liquid form.
Una vez obtenido el producto granulado en la etapa (ii) éste se somete al proceso de secado y posteriormente a enfriado con aire a temperatura ambiente.Once the granulated product is obtained in the step (ii) this is subjected to the drying process and subsequently to cooled with air at room temperature.
El producto granulado, seco y frío obtenido de la etapa (iv) se clasifica, de modo que se retiran las porciones de producto granulado de diámetro superiores a 8 mm. e inferiores a 1 mm.The granulated, dry and cold product obtained from step (iv) is classified, so that portions of granulated product with a diameter greater than 8 mm. and less than 1 mm
El producto fino y el grueso molido retirados,
retornan al inicio del procedimiento, con las materias primas
sólidas.The fine product and the coarse ground removed, return at the beginning of the procedure, with the raw materials
solid.
Alternativamente también el producto granulado se puede clasificar antes de la etapa (iv) de enfriado y enfriar solamente la porción deseada del mismo.Alternatively also the granulated product can be classified before stage (iv) of cooling and cooling only the desired portion thereof.
La fracción de producto granulado con un diámetro comprendido entre 1 y 8 mm, se somete en una última etapa a un acondicionado final donde se impregna en superficie de material antiapelmazante.The fraction of granulated product with a diameter between 1 and 8 mm, is subjected in a last stage to a final conditioning where it is impregnated on the surface of material anti-caking.
Es muy importante la temperatura de granulación y la de secado.Granulation temperature is very important and drying.
El aditivo reductor que se obtiene a partir del procedimiento de la invención constituye otro objeto de la presente invención.The reducing additive that is obtained from Process of the invention constitutes another object of the present invention.
La concentración mínima en hierro (II) en el aditivo reductor es típicamente del 15%. El Fe (II) se encuentra en diferentes formas hidratadas del sulfato ferroso. La granulometría del producto final (aditivo reductor) oscila de 1 a 8 mm de diámetro.The minimum concentration in iron (II) in the reducing additive is typically 15%. Faith (II) is found in different hydrated forms of ferrous sulfate. Grain size of the final product (reducing additive) ranges from 1 to 8 mm diameter.
El producto final está acondicionado con fuel u otros antiapelmazantes para minimizar su apelmazamiento durante su almacenaje, además de evitar la generación de polvo.The final product is conditioned with fuel or other anti-caking agents to minimize caking during your storage, in addition to avoiding the generation of dust.
Claims (5)
- (i)(i)
- dosificar y mezclar sulfato ferroso heptahidratado con un regulador de pH en forma de polvo;dose and mix ferrous sulfate heptahydrate with a pH regulator in powder form;
- (ii)(ii)
- homogeneización y granulación de la mezcla anterior;homogenization and granulation of the mixture previous;
- (iii)(iii)
- secado del granulado obtenido en la etapa (ii);drying of the granulate obtained in the stage (ii);
- (iv)(iv)
- enfriado del granulado.cooled of the granulate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES200701497A ES2316283B1 (en) | 2007-05-31 | 2007-05-31 | MANUFACTURING PROCEDURE OF GRANULATED FERROUS SULPHATE AS ADDITIVE FOR CEMETERIES. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES200701497A ES2316283B1 (en) | 2007-05-31 | 2007-05-31 | MANUFACTURING PROCEDURE OF GRANULATED FERROUS SULPHATE AS ADDITIVE FOR CEMETERIES. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| ES2316283A1 true ES2316283A1 (en) | 2009-04-01 |
| ES2316283B1 ES2316283B1 (en) | 2010-02-05 |
Family
ID=40434714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES200701497A Expired - Fee Related ES2316283B1 (en) | 2007-05-31 | 2007-05-31 | MANUFACTURING PROCEDURE OF GRANULATED FERROUS SULPHATE AS ADDITIVE FOR CEMETERIES. |
Country Status (1)
| Country | Link |
|---|---|
| ES (1) | ES2316283B1 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1984001942A1 (en) * | 1982-11-17 | 1984-05-24 | Aalborg Portland Cement | Methods of producing a dry cement mixture and a free flowing ferrous sulphate hydrate product and products prepared by the methods |
| WO1984002900A1 (en) * | 1983-01-20 | 1984-08-02 | Cementa Ab | A method of reducing eczema-inducing chromium in cement by adding ferrous sulfate, an additive comprising ferrous sulfate and the use of the additive |
| EP1559694A2 (en) * | 2004-01-27 | 2005-08-03 | Kronos International, Inc. | Powdery mixture, process for making it and use in the chromate reduction of cement |
| US20070039522A1 (en) * | 2003-07-17 | 2007-02-22 | Kerr-Mcgee Pigments Gmbh | Reducing agent for the soluble chromate content of cement and methods for the production thereof |
| ES2266711T3 (en) * | 2003-12-12 | 2007-03-01 | Kehrmann Alexander | HYDRAULIC BINDER. |
| DE102006043804A1 (en) * | 2005-09-15 | 2007-03-29 | Sachtleben Chemie Gmbh | Ferrous sulfate-based reducing agent, useful for reducing allergenic chromate in building materials, e.g. cement, has ratio of mono-, tetra- and heptahydrates controlled by adding water to improve effectiveness |
-
2007
- 2007-05-31 ES ES200701497A patent/ES2316283B1/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1984001942A1 (en) * | 1982-11-17 | 1984-05-24 | Aalborg Portland Cement | Methods of producing a dry cement mixture and a free flowing ferrous sulphate hydrate product and products prepared by the methods |
| WO1984002900A1 (en) * | 1983-01-20 | 1984-08-02 | Cementa Ab | A method of reducing eczema-inducing chromium in cement by adding ferrous sulfate, an additive comprising ferrous sulfate and the use of the additive |
| US20070039522A1 (en) * | 2003-07-17 | 2007-02-22 | Kerr-Mcgee Pigments Gmbh | Reducing agent for the soluble chromate content of cement and methods for the production thereof |
| ES2266711T3 (en) * | 2003-12-12 | 2007-03-01 | Kehrmann Alexander | HYDRAULIC BINDER. |
| EP1559694A2 (en) * | 2004-01-27 | 2005-08-03 | Kronos International, Inc. | Powdery mixture, process for making it and use in the chromate reduction of cement |
| DE102006043804A1 (en) * | 2005-09-15 | 2007-03-29 | Sachtleben Chemie Gmbh | Ferrous sulfate-based reducing agent, useful for reducing allergenic chromate in building materials, e.g. cement, has ratio of mono-, tetra- and heptahydrates controlled by adding water to improve effectiveness |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2316283B1 (en) | 2010-02-05 |
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