PT90917B - GRANULATION PROCESS - Google Patents
GRANULATION PROCESS Download PDFInfo
- Publication number
- PT90917B PT90917B PT9091789A PT9091789A PT90917B PT 90917 B PT90917 B PT 90917B PT 9091789 A PT9091789 A PT 9091789A PT 9091789 A PT9091789 A PT 9091789A PT 90917 B PT90917 B PT 90917B
- Authority
- PT
- Portugal
- Prior art keywords
- container
- process according
- working bodies
- added
- treatment
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
- B01J2/10—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic in stationary drums or troughs, provided with kneading or mixing appliances
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
- B01J2/12—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic in rotating drums
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Glanulating (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
- Processing Of Solid Wastes (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
Description
MEMÓRIA DESCRITIVA invento refere-se a um processo do tipo definido na introdução da reivindicação 1. Os processos de granulação conhecidos usando discos rotativos ou transportadores de parafuso sofrem de vários inconvenientes em parte na forma de custos elevados e em parte na forma de defeitos nos granulados produzidos, tais como tamanho muito grande ou estrutura em camadas, os quais podem resultar em tendência para se quebrarem ou desintegrarem.DESCRIPTIVE MEMORY The invention relates to a process of the type defined in the introduction to claim 1. The known granulation processes using rotating discs or screw conveyors suffer from several drawbacks partly in the form of high costs and partly in the form of defects in the granules produced, such as very large size or layered structure, which can result in a tendency to break or disintegrate.
São conhecidos processos de granulação nos quais são usados quer discos rotativos quer o sistema de transportador de para fuso (um princípio de fresa rotativa). Estes processos conhecidos têm vários inconvenientes. Assim, o princípio do disco rotativo, normalmente, exige instalações dispendiosas, e além disso, o processo de granulação é ineficaz, uma vez que os granulados obtidos ficam com uma estrutura em camadas, o que leva os granulados a ten derem a quebrar ou desintegrarem-se, quando são secos a temperaturas elevadas.Granulation processes are known in which both rotating discs and the spindle conveyor system (a rotary milling principle) are used. These known processes have several drawbacks. Thus, the rotating disk principle usually requires expensive installations, and in addition, the granulation process is ineffective, since the granules obtained are layered, which leads the granules to tend to break or disintegrate. up, when they are dried at elevated temperatures.
De acordo com o princípio da fresa axial, o material em bru to é submetido a humidificação num transportador de parafuso, moagem numa fresa axial humidificadora e, tipicamente, passa através de um crivo vibratório ou, via a chamada máquina de picar, através de uma placa com furos, adaptada para este fim, pela qual o material amassado é descarregado em vários alturas e é picado em pedaços adequados. Este processo de fabrico também acarreta custos bastante elevados e, adicionamente, necessita de pré- e póstra tamento extensivos do material em bruto, em vista de exigida humidificação e amassadura antes de ser picado. Este processo de fa brico proporciona granulados de natureza não esférica, o que é inconveniente quando se expõem os granulados a esforços p.e., por ar mazenagem ou transporte, o que facilmente conduz a um certo desper dício de material.According to the axial milling principle, the raw material is subjected to humidification on a screw conveyor, grinding on a humidifying axial milling machine and, typically, it passes through a vibrating screen or, via the so-called mincing machine, through a plate with holes, adapted for this purpose, whereby the kneaded material is discharged at various heights and is chopped into suitable pieces. This manufacturing process also entails very high costs and, in addition, requires extensive pre- and post-treatment of the raw material, in view of the required humidification and kneading before being chopped. This manufacturing process provides pellets of a non-spherical nature, which is inconvenient when the pellets are exposed to stresses e.g. by air or storage, which easily leads to a certain waste of material.
Assim, desenvolveu-se um sistema de granulação que utiliza uma máquina de mistura rotativa, conhecida per se, a qual em combi nação com um novo processo se verificou ser vantajosa para fabricar granulados. Aqui o recipiente de mistura é cheio com uma camadaThus, a granulation system was developed using a rotary mixing machine, known per se, which in combination with a new process has been found to be advantageous for manufacturing granulates. Here the mixing bowl is filled with a layer
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-3de objectos esféricos tais como pedras ou semelhantes. A utiliza ção de tais objectos num recipiente de mistura rotativo é conheci, da em ligação com os chamados moinhos de esferas, mas a finalidade aqui, em contraste com o objecto do presente invento, é obter uma cominuição dos materiais.-3 spherical objects such as stones or the like. The use of such objects in a rotating mixing vessel is known in connection with so-called ball mills, but the purpose here, in contrast to the object of the present invention, is to obtain a comminution of the materials.
pedido da patente da requerente 1026/87, depositado em 27 de Fevereiro de 1987, descreve um processo do tipo do/presente invento, no qual um recipiente que roda em torno de um eixo vertical e que está equipado com meios de raspagem, é usado como um recipiente de trabalho. 0 fundo do recipiente está coberto com uma camada de corpos de trabalho, substancialmente esféricos, e o grau de humidade do material adicionado é regulado ,antes ou após a adição, de forma que, após um certo tempo de trabalho o material assenta como cascas sobre os corpos de trabalho e estas despegam-se após trabalho adicional durante algum tempo, e é finalmente des carregado no fundo do recipiente, através de uma grelha.Applicant's patent application 1026/87, filed on February 27, 1987, describes a process of the type of the / the present invention, in which a container which rotates about a vertical axis and which is equipped with scraping means, is used as a working container. The bottom of the container is covered with a layer of working spheres, substantially spherical, and the degree of humidity of the added material is regulated, before or after the addition, so that after a certain period of work the material settles like shells on the working bodies and these come off after additional work for some time, and are finally unloaded at the bottom of the container, through a grid.
Com este processo verificou-se ser possível fabricar granulados estáveis a baixos custos, p.e. sendo a dimensão máxima da ordem de 0,5 - 6 mm.With this process it was found to be possible to manufacture stable granules at low costs, e.g. the maximum dimension being on the order of 0.5 - 6 mm.
presente invento baseia-se na verificação de que se podem obter resultados correspondentemente bons num recipiente de trabalho possuindo um eixo de rotação horizontal, e os aspectos características do processo do presente invento são, assim, definidos na introdução da reivindicação 1.the present invention is based on the verification that correspondingly good results can be obtained in a working container having a horizontal axis of rotation, and the characteristic aspects of the process of the present invention are thus defined in the introduction of claim 1.
Nesta concretização do processo, a velocidade de rotação é mantida, de preferência, a um valor baixo, como indicado na reivindicação 2, de forma que o material será substancialmente traba lhado por pressão e fricção.In this embodiment of the process, the speed of rotation is preferably maintained at a low value, as indicated in claim 2, so that the material will be substantially worked by pressure and friction.
Outros pormenores relevantes estão descritos nas reivindicações 3-6 .Other relevant details are described in claims 3-6.
491491
Claims (6)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK335888A DK159643C (en) | 1988-06-20 | 1988-06-20 | granulation |
Publications (2)
Publication Number | Publication Date |
---|---|
PT90917A PT90917A (en) | 1989-12-29 |
PT90917B true PT90917B (en) | 1994-11-30 |
Family
ID=8121972
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PT9091789A PT90917B (en) | 1988-06-20 | 1989-06-20 | GRANULATION PROCESS |
Country Status (4)
Country | Link |
---|---|
DK (1) | DK159643C (en) |
ES (1) | ES2016142A6 (en) |
PT (1) | PT90917B (en) |
WO (1) | WO1989012497A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITRE20060054A1 (en) * | 2006-04-28 | 2007-10-29 | Bonfiglioli Ing Spa | METHOD FOR THE MANUFACTURE OF GRANULAR MATERIAL TO BE PLACED ON LAND AND ITS PLANT |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1156388B (en) * | 1961-01-24 | 1963-10-31 | Kloeckner Humboldt Deutz Ag | Process for granulating fine-grained substances |
FR1587398A (en) * | 1968-09-27 | 1970-03-20 | ||
SE390382B (en) * | 1975-04-24 | 1976-12-20 | Sala International Ab | DEVICE FOR MICROPELLETIZATION OF POWDERED MATERIAL |
SE406278B (en) * | 1976-09-06 | 1979-02-05 | Graenges Ab | WAY TO TREAT SILICODE |
DK156380C (en) * | 1987-02-27 | 1990-01-08 | Peter Lip | PROCEDURE FOR GRANULATING CALCULAR POWDER OR LIKE, WHICH USE A ROTATING MODEL BLENDER |
-
1988
- 1988-06-20 DK DK335888A patent/DK159643C/en not_active IP Right Cessation
-
1989
- 1989-06-19 WO PCT/DK1989/000150 patent/WO1989012497A1/en unknown
- 1989-06-19 ES ES8902134A patent/ES2016142A6/en not_active Expired - Lifetime
- 1989-06-20 PT PT9091789A patent/PT90917B/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
PT90917A (en) | 1989-12-29 |
DK335888D0 (en) | 1988-06-20 |
DK159643C (en) | 1991-04-08 |
WO1989012497A1 (en) | 1989-12-28 |
ES2016142A6 (en) | 1990-10-16 |
DK335888A (en) | 1989-12-21 |
DK159643B (en) | 1990-11-12 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FG3A | Patent granted, date of granting |
Effective date: 19940518 |
|
MM3A | Annulment or lapse |
Free format text: LAPSE DUE TO NON-PAYMENT OF FEES Effective date: 19951130 |