WO2008068432A2 - Appareil de sélection granulométrique et/ou de séchage de matière - Google Patents
Appareil de sélection granulométrique et/ou de séchage de matière Download PDFInfo
- Publication number
- WO2008068432A2 WO2008068432A2 PCT/FR2007/001901 FR2007001901W WO2008068432A2 WO 2008068432 A2 WO2008068432 A2 WO 2008068432A2 FR 2007001901 W FR2007001901 W FR 2007001901W WO 2008068432 A2 WO2008068432 A2 WO 2008068432A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gas
- pipe
- selector
- opening
- blades
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B4/00—Separating solids from solids by subjecting their mixture to gas currents
- B07B4/02—Separating solids from solids by subjecting their mixture to gas currents while the mixtures fall
Definitions
- the present invention relates to an apparatus for granulometric selection and / or material drying, for the suspension treatment of granular mineral materials of which at least 90% by weight have a size less than 60 mm.
- in-line suspension drying machines which apply to materials having an average particle size of less than 10 mm.
- flash Such systems which are in the form of a development of a vertical pipe of hot gases have been described in publications and in particular B.Reinhardt, Ph.D. Duhamel, R. Evrard, A. Shoemaker - The flash drying - Seminar of the Society of Mineral Industry - Dijon, October 9, 1999.
- these devices are not considered granulometric selectors. Indeed, when these devices are loaded with a coarse fraction composed of particles of various diameters, generally, most of the fraction falls, without separation and suspension of the finest particles that compose it.
- the object of the present invention is to provide an apparatus for granulometric selection and / or drying of pulverulent materials, for the suspension treatment of granular mineral materials of which at least 90% by weight are less than 60 mm in size, which operates in line and stably for application to materials with a wide particle size spectrum.
- Another object of the invention is to provide a particle size selection apparatus and / or drying allowing a good separation of fractions, which can be resuspended.
- Another object of the invention is to provide an apparatus for granulometric selection and / or drying of pulverulent materials, consisting mainly of a vertical gas pipe of small size, especially of height substantially less than the height of the gas pipe. flash type drying apparatus known to those skilled in the art.
- Another object of the invention is to provide an apparatus for granulometric selection and / or drying of pulverulent materials, operating with the aid of an ascending flow of gas whose speed is much lower than the speed of the upward flow of gas. flash drying apparatus known to those skilled in the art, thus reducing the pressure drop.
- the apparatus relates to a particle size selection apparatus and / or drying pulverulent materials, for the suspension treatment of granular mineral materials of which at least 90% by weight are smaller than 60 mm, the apparatus consisting mainly of a substantially vertical gas line, ascending flow, provided with a gas inlet at its base, equipped with a lower opening and an upper opening between which a feed opening is also provided for the introduction of materials, wherein apparatus a part of the material, especially fine said, can escape with the gas through the upper opening through the lift of said upward flow, while another part of material, coarser, is not driven by said gas and drops by the lower opening.
- the apparatus furthermore has means for creating turbulences, favorable to the separation of the different size fractions and to the suspension of the substances, provided at the internal wall of the gas pipe, and located between the lower opening and the supply opening of said pipe.
- the invention also relates to a continuous grinding plant, in particular for a cement plant, of closed circuit type, comprising:
- a mill in particular with rollers or with balls, having an input of products to be milled and an outlet of crushed products,
- a selector dryer consisting of a grain size selection and drying upflow apparatus according to the invention, comprising a lower rejection outlet, connected to the inlet of the mill, a top flight exit, between which is also provided a feed opening material,
- a dynamic selector comprising at least one input of material connected at least to said output of flight material of the selector-dryer, an output for the selected material, and a refusal output connected to the input of the mill, a filter enabling filter the charged gases of the selected materials, connected to the material output of the dynamic selector, the outlet of the mill being connected to the at least one material inlet of the dynamic selector, and / or to the feed opening of the selector-dryer,
- At least one feed of material supplying the inlet of the mill and / or the feed opening of the selector-dryer.
- FIG. 1 schematically illustrates, in sectional view, a granulometric selection and / or drying apparatus according to the invention according to one embodiment
- FIG. 2 schematically illustrates, in sectional view, an apparatus for granulometric selection and / or drying of pulverulent materials according to the invention according to a second embodiment
- FIG. 3 schematically illustrates, in sectional view, a particle size selection apparatus. and / or drying of pulverulent materials, according to the invention according to a third embodiment
- FIGS. 4a to 4d are respectively views in horizontal sections illustrating various possibilities of supplying gas to a plenum, also called a "wind box",
- FIG. 5 is a view in vertical section of the gas pipe, illustrating a blade of an apparatus, in particular as illustrated in FIG.
- FIG. 6 is a schematic view of a continuous grinding plant, in particular for a cement plant, of closed circuit type, incorporating a grain size selection and / or drying apparatus according to the invention
- FIG. 7 is a logarithmic scale chart to illustrate the high particle size selection capabilities of the granulometric selection apparatus and / or drying according to the invention.
- the apparatus for selecting granulometric and / or drying pulverulent materials, according to the invention differs from the known "flash" type drying systems, which comprise as a main element for suspending materials, a venturi in the where the speed of the gases is raised between 30 and 40 m / s. The construction of the venturi forces a total height of the device which is 5 to 6 times the value of the diameter of the vertical pipe.
- the apparatus for granulometric selection and / or drying of pulverulent materials, according to the invention, is intended for the suspension treatment of granular mineral materials of which at least 90% by weight have a size of less than 60 mm.
- the apparatus consists mainly of a gas pipe 1, substantially vertical, upflow Fa 1 provided with a gas inlet at its base.
- This pipe may be of substantially circular elliptical or rectangular section.
- the form factor, ie the length / width ratio of the dimensions of the section does not exceed three.
- This pipe is equipped with a lower opening 2, and an upper opening 3, between which a feed opening 4 is also provided for the introduction of materials.
- the lower opening 2 can be fed with gas including a plenum 7 also called wind box.
- Part of the granular mineral matter, in particular so-called “fines”, can escape with the gas through the upper opening 3 thanks to the lift of the upward flow Fa, while another part of the materials, more coarse, is not driven by the gas and falls through the lower opening 2.
- the apparatus 30 has, in addition, means
- the turbulences allow in particular the separation of the particles of various diameters, a coarse fraction of material, thus allowing the suspension and the evacuation by the upper opening 3 of the so-called “fine” particles of this fraction, and the larger particles fall through the opening 2.
- the means 5 for creating the turbulences can be constituted, at least in part, by obstacles for the upward gas flow Fa, situated against the internal wall of the pipe
- the obstacles may take the form of generally horizontal blades, the length of which is oriented towards the center of the gas pipe 1.
- the blades may be arranged at least in two successive levels of height, as illustrated in particular in Figure 1.
- the blades may be arranged angularly staggered between two successive levels of height, with, where appropriate, lateral zones. covering, forcing the upward gas flow to zigzag between the blades of different levels. If we define the length of the blade in the direction towards the center of the gas pipe 1 and the width in the orthogonal direction of the horizontal plane, the length of each blade can represent between 2 and 30% of the free width of the conduct 1 along the axis of the blade.
- the sum of the widths of each blade in particular disposed at least at two successive levels of height may represent at least 60% of the peripheral length of the pipe.
- the sum of the widths of the blades may advantageously be between 120% and 200% of the peripheral length of the pipe.
- the shape and position of the blades 10 in the gas pipe 1 may be favorable to an accumulation of materials, including stagnant, on top of said blades 10 during operation, in order to protect said blades against erosion.
- the blade may be of concave shape on the blade top or may have one or more upper flanges, in particular at the end of blades 13.
- the end 13 may be protected by a harder material, the pipe 1 may be covered with a material 12 of protection against abrasion.
- the means 5 for creating turbulence may be constituted, at least in part, by at least one wall gas flow Fp, oriented generally perpendicular to the direction of the ascending flow Fa penetrating notably radially or tangentially in the internal volume of the gas pipe 1 through the wall orifices 8 of said gas pipe 1.
- the surface sum of the orifices 8 may represent between 15% and 150% of the free section of the pipe 1.
- the apparatus may have at least one plenum 7 surrounding the lower part of the pipe, for supplying gas to the lower opening 2 of the gas inlet and / or where appropriate the orifices 8 of the walls of the pipe.
- the gas inlet may consist solely of the lower opening 2.
- the gas inlet of the pipe is constituted by the opening 2 and the wall openings 8.
- the gas inlet is formed solely by the wall openings 8.
- the plenum 7 may be in the form of a box having a discharge outlet 9 for falling materials, as illustrated in particular in Figure 1 or 2.
- the plenum 7 can be supplied with gas via at least one radial gas inlet 6, 6-1 and / or at least one tangential gas inlet 6-2, 6-3.
- the plenum chamber 7 is supplied with one or two radial inlets 6; 6, 6-1.
- the plenum chamber 7 is fed by one or two tangential inputs 6-2; 6-2, 6-3.
- the embodiment illustrated in Figure 1 mainly comprises a gas pipe 1 having an upper opening 3, a lower opening 2 also constituting a main gas inlet.
- the means 5 for creating turbulence are constituted, on the one hand, by obstacles constituted by blades 10, distributed in several successive height levels and angularly arranged in staggered rows in two successive levels of height, and on the other hand, by wall openings 8 passing through the wall gas flows Fp.
- a single plenum will surround the lower part of the pipe and can supply gas, on the one hand, the orifices 8, and on the other hand the lower opening 2.
- This device can be implemented with a gas pipe whose length does not exceed 4 to 5 times the value of the diameter.
- the speed of the upward flow of gas can be 15 m / s.
- the topics have a maximum grain size of 100 mm at a specific concentration of between 5 and 6 kg / kg of gas.
- the installation can operate without instability and selects materials such that only particles smaller than about 0.8 mm are flown and particles larger than about 2 mm fall.
- the resulting pressure drop is of the order of 60% compared to the "flash" type drying system known from the state of the art for the same flow of material.
- the example of FIG. 2 differs from the example of FIG. 1 in that the lower opening 2 is of smaller diameter than the largest section of the gas duct 1, formed at the end of a trunk of cone.
- FIG. 3 describes an apparatus in which all the gases are introduced through the wall orifices 8 and not through the bottom opening 2.
- the sum of the wall flows Fp then allows the creation of the upflow Fa.
- the wall orifices 8 are situated, for the most part, below the level of blades 10 constituting obstacles for the upward flow Fa.
- the raw material fed into the apparatus forming the subject of the invention has a particle size such that 50% of the grains are smaller (or greater) than 3.2. mm with 10% greater than 15 mm mesh and a maximum size of 35 mm.
- the specific feed rate is 5 to 6 kg / kg of gas.
- the material flown to the exit 3 has a particle size such that almost all the grains have a size less than 7 mm with 50% lower (or higher) than 0.48 mm.
- the material that falls through the lower opening 2 is such that almost all the grains have a size larger than
- the separation curve that expresses the split ratio between the two streams for each grain size has a steep slope between grain sizes of 0.7 mm where only 20% of the material falls back and 3 mm where 90% of the materials fall back. This steep slope expresses a high power of selection.
- the invention will also relate to a drying installation comprising an apparatus according to the invention, the gas inlet of which is fed by a source of gas in temperature.
- the invention will also relate to a plant 40 for continuous grinding, in particular for a cement plant, of closed circuit type or comprising:
- a mill 15 in particular with rollers or with balls, having a product inlet to be milled and a product outlet crushed,
- a selector-dryer 22 constituted by a grain size selection and drying apparatus according to the invention, comprising a bottom rejection outlet 9 connected to the inlet of the mill 15, an outflow of flight material , upper, between which is also provided a feed opening material 4,
- a dynamic selector 16 comprising at least one input of material connected at least to said output of flight material of the selector-dryer 22, an output for the selected material, and a refusal output 23 connected to the input of the mill 15, a filter 21 for filtering the material-laden gases connected to the material outlet of the dynamic selector 16,
- FIG. 6 non-exhaustively illustrates a grinding plant incorporating a device 30 for selecting granulometric and drying.
- This facility processes materials 17, 18 at least one of which is wet.
- the plant which processes the materials comprises a grinder 15, a dynamic selector 16, a filter 21 which collects the ground finished product, and material handling means such as a bucket chain or other conveyors, as well as ventilation means for the gases.
- This plant receives hot gases from an undescribed source.
- the material feed 17 feeds the mill 15, and the product 19 leaving the mill is fed to the selector 16.
- the fine fraction is the finished product collected at 21 and the coarse fraction is returned to the mill.
- the hot gases 20 feed the mill 15, the dryer selector 22 and the dynamic selector 16.
- the particle size selection and drying apparatus 30 is located on the path of the gas supplying the dynamic selector 16 to which it is connected via its gas line 1.
- the apparatus receives the hot gases through the inlet 6 and is fed by a supply of material 18 to perform the drying more effectively than if this material was fed directly to the mill 15.
- the thinnest fraction continues to the dynamic selector 16 in the path of the gas while the coarse fraction returns through the output 9 to the mill 15 at the same time as the refusal 23 of the selector.
- the refusal can be carried out by a refusal line 23 'of the dynamic selector 16, disposed internally to the gas line 1 of the apparatus 30 of the selector-dryer 22, said rejection line 23' opening below or near the exit 9 of said selector dryer 22.
- the selector dryer 22 can make it possible to select the material whose grain size is less than about one millimeter, the dynamic selector 16 allowing the selection of material whose grain size is less than one hundred or even ten micrometers.
- the particle size selection operated by the apparatus 22 avoids both the dynamic selector 16 to be overloaded in coarse fractions from the suspension drying step of a conventional "flash" type system, and the grinder 15. be overloaded in fine fractions if the new material supplied by the feed 18 contains a significant amount. If the drying capacity of the mill 15 is low, the material 19 leaving the mill can be divided into two streams 19-1 and 19-2, the second being again subjected to the fast drying step.
Landscapes
- Drying Of Solid Materials (AREA)
- Combined Means For Separation Of Solids (AREA)
- Crushing And Grinding (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
- Glanulating (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
Description
Claims
Priority Applications (10)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL07870307T PL2106294T3 (pl) | 2006-11-20 | 2007-11-20 | Urządzenie do separacji granulometrycznej i/lub do suszenia materiału |
DK07870307.1T DK2106294T3 (da) | 2006-11-20 | 2007-11-20 | Apparatur til kornstørrelsessortering og/eller materialetørring |
CN2007800430756A CN101583429B (zh) | 2006-11-20 | 2007-11-20 | 粒度选择和/或物质干燥装置 |
JP2009536765A JP5497443B2 (ja) | 2006-11-20 | 2007-11-20 | 物質の粒度選択および/または乾燥装置 |
MX2009005334A MX2009005334A (es) | 2006-11-20 | 2007-11-20 | Aparato de secado de materia y/o seleccion de tamaño de grano. |
ES07870307T ES2384402T3 (es) | 2006-11-20 | 2007-11-20 | Aparato de selección granulométrica y/o de secado de materia |
AT07870307T ATE549088T1 (de) | 2006-11-20 | 2007-11-20 | Korngrössenwahl und/oder materialtrocknungsvorrichtung |
CA2670906A CA2670906C (fr) | 2006-11-20 | 2007-11-20 | Appareil de selection granulometrique et/ou de sechage de matiere |
EP07870307A EP2106294B1 (fr) | 2006-11-20 | 2007-11-20 | Appareil de sélection granulométrique et/ou de séchage de matière |
US12/447,973 US8245963B2 (en) | 2006-11-20 | 2007-11-20 | Grain size selection and/or matter drying apparatus |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0610144A FR2908673B1 (fr) | 2006-11-20 | 2006-11-20 | Appareil de selection granulometrique et/ou de sechage de matiere. |
FR0610144 | 2006-11-20 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2008068432A2 true WO2008068432A2 (fr) | 2008-06-12 |
WO2008068432A3 WO2008068432A3 (fr) | 2008-08-07 |
Family
ID=38120376
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2007/001901 WO2008068432A2 (fr) | 2006-11-20 | 2007-11-20 | Appareil de sélection granulométrique et/ou de séchage de matière |
Country Status (14)
Country | Link |
---|---|
US (1) | US8245963B2 (fr) |
EP (1) | EP2106294B1 (fr) |
JP (1) | JP5497443B2 (fr) |
CN (1) | CN101583429B (fr) |
AT (1) | ATE549088T1 (fr) |
CA (1) | CA2670906C (fr) |
DK (1) | DK2106294T3 (fr) |
ES (1) | ES2384402T3 (fr) |
FR (1) | FR2908673B1 (fr) |
MX (1) | MX2009005334A (fr) |
PL (1) | PL2106294T3 (fr) |
RU (1) | RU2445174C2 (fr) |
UA (1) | UA95818C2 (fr) |
WO (1) | WO2008068432A2 (fr) |
Cited By (1)
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WO2011151534A1 (fr) | 2010-05-05 | 2011-12-08 | Fives Fcb | Procede et installation de broyage d'une matiere minerale contenant au moins du calcium et des impuretes metalliques |
Families Citing this family (6)
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JP5179540B2 (ja) * | 2010-05-20 | 2013-04-10 | 株式会社キンキ | 粉砕乾燥機とそれを備えた粉砕・乾燥設備 |
DE102010054849A1 (de) * | 2010-12-17 | 2012-06-21 | Zeppelin Systems Gmbh | Verfahren und Vorrichtung zur Abscheidung von feinen Partikeln aus granulatförmigen Schüttgütern in einer Rohrleitung |
CN104990390A (zh) * | 2015-07-30 | 2015-10-21 | 天能水泥有限责任公司 | 干排电石渣干燥和硅铁收集方法及系统 |
CN109012888A (zh) * | 2018-10-26 | 2018-12-18 | 南京中材粉体工程科技有限公司 | 一种辊式立磨 |
CN112742049B (zh) * | 2019-10-30 | 2022-04-08 | 中国石油化工股份有限公司 | 旋转闪蒸干燥机 |
CN114226248B (zh) * | 2021-11-16 | 2022-11-18 | 太原理工大学 | 循环流化床燃煤灰渣分质分级的处理方法 |
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2006
- 2006-11-20 FR FR0610144A patent/FR2908673B1/fr not_active Expired - Fee Related
-
2007
- 2007-11-20 PL PL07870307T patent/PL2106294T3/pl unknown
- 2007-11-20 ES ES07870307T patent/ES2384402T3/es active Active
- 2007-11-20 UA UAA200904956A patent/UA95818C2/ru unknown
- 2007-11-20 EP EP07870307A patent/EP2106294B1/fr active Active
- 2007-11-20 WO PCT/FR2007/001901 patent/WO2008068432A2/fr active Application Filing
- 2007-11-20 RU RU2009123505/03A patent/RU2445174C2/ru active
- 2007-11-20 CA CA2670906A patent/CA2670906C/fr active Active
- 2007-11-20 CN CN2007800430756A patent/CN101583429B/zh active Active
- 2007-11-20 DK DK07870307.1T patent/DK2106294T3/da active
- 2007-11-20 JP JP2009536765A patent/JP5497443B2/ja active Active
- 2007-11-20 MX MX2009005334A patent/MX2009005334A/es active IP Right Grant
- 2007-11-20 AT AT07870307T patent/ATE549088T1/de active
- 2007-11-20 US US12/447,973 patent/US8245963B2/en active Active
Patent Citations (1)
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GB2193448A (en) | 1986-08-08 | 1988-02-10 | Uralsky Politekhn Inst | Air classifier for granular materials |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011151534A1 (fr) | 2010-05-05 | 2011-12-08 | Fives Fcb | Procede et installation de broyage d'une matiere minerale contenant au moins du calcium et des impuretes metalliques |
JP2013525256A (ja) * | 2010-05-05 | 2013-06-20 | フィーヴ エフセーベー | 少なくともカルシウムおよび金属不純物を含有する鉱物材料の粉砕方法および粉砕設備 |
US10569277B2 (en) | 2010-05-05 | 2020-02-25 | Fives Fcb | Method of grinding a mineral material containing at least calcium and metal impurities, and plant suitable for grinding a mineral material containing calcium and metal impurities as they stand |
Also Published As
Publication number | Publication date |
---|---|
US8245963B2 (en) | 2012-08-21 |
RU2009123505A (ru) | 2010-12-27 |
EP2106294B1 (fr) | 2012-03-14 |
CN101583429B (zh) | 2011-11-16 |
EP2106294A2 (fr) | 2009-10-07 |
MX2009005334A (es) | 2009-09-02 |
UA95818C2 (ru) | 2011-09-12 |
JP5497443B2 (ja) | 2014-05-21 |
US20100133369A1 (en) | 2010-06-03 |
CA2670906C (fr) | 2012-01-10 |
CA2670906A1 (fr) | 2008-06-12 |
JP2010510468A (ja) | 2010-04-02 |
CN101583429A (zh) | 2009-11-18 |
PL2106294T3 (pl) | 2012-08-31 |
FR2908673A1 (fr) | 2008-05-23 |
ATE549088T1 (de) | 2012-03-15 |
ES2384402T3 (es) | 2012-07-04 |
FR2908673B1 (fr) | 2009-11-06 |
WO2008068432A3 (fr) | 2008-08-07 |
RU2445174C2 (ru) | 2012-03-20 |
DK2106294T3 (da) | 2012-06-18 |
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