EP3215272A1 - Method for producing gravels separated into fractions of different grain sizes - Google Patents
Method for producing gravels separated into fractions of different grain sizesInfo
- Publication number
- EP3215272A1 EP3215272A1 EP15797608.5A EP15797608A EP3215272A1 EP 3215272 A1 EP3215272 A1 EP 3215272A1 EP 15797608 A EP15797608 A EP 15797608A EP 3215272 A1 EP3215272 A1 EP 3215272A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rocks
- aggregates
- fractions
- comminution
- grain
- 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
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 239000011435 rock Substances 0.000 claims abstract description 64
- 238000000034 method Methods 0.000 claims abstract description 43
- 238000003860 storage Methods 0.000 claims abstract description 11
- 230000008569 process Effects 0.000 claims description 13
- 238000005406 washing Methods 0.000 claims description 11
- 239000004567 concrete Substances 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 239000011707 mineral Substances 0.000 claims description 2
- 239000002893 slag Substances 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims 2
- 238000000227 grinding Methods 0.000 abstract description 9
- 235000013339 cereals Nutrition 0.000 description 81
- 239000002245 particle Substances 0.000 description 32
- 239000000047 product Substances 0.000 description 29
- 239000000463 material Substances 0.000 description 23
- 239000004576 sand Substances 0.000 description 11
- 235000019738 Limestone Nutrition 0.000 description 9
- 239000006028 limestone Substances 0.000 description 9
- 239000011044 quartzite Substances 0.000 description 8
- 241000196324 Embryophyta Species 0.000 description 7
- 238000009826 distribution Methods 0.000 description 6
- 238000005265 energy consumption Methods 0.000 description 6
- 239000004568 cement Substances 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 235000013312 flour Nutrition 0.000 description 4
- 239000010426 asphalt Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- -1 gabbro Substances 0.000 description 3
- 239000000470 constituent Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000010459 dolomite Substances 0.000 description 2
- 229910000514 dolomite Inorganic materials 0.000 description 2
- 239000010438 granite Substances 0.000 description 2
- 235000012054 meals Nutrition 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 238000005549 size reduction Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 241001417093 Moridae Species 0.000 description 1
- 206010039509 Scab Diseases 0.000 description 1
- 240000003834 Triticum spelta Species 0.000 description 1
- 241000276425 Xiphophorus maculatus Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000013590 bulk material Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000010191 image analysis Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000386 microscopy Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/02—Crushing or disintegrating by roller mills with two or more rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
Definitions
- the invention relates to a process for the production of aggregates separated in fractions of different particle sizes with isometric particle shapes.
- the invention further relates to a system suitable for carrying out such a process.
- aggregate refers to a granular material that can be used in the manufacture of concrete, asphalt or other base courses, aggregates of which may be natural or fractured, which fractures large rocks industrially, thereby producing aggregates of desired particle sizes ,
- crushed aggregates depending on the size of the grain, a distinction is made between powdered rock with a particle size of up to 0,063 mm, and fine aggregates, also known as 'crushing', with a particle size of> 0,063 mm to 2 mm (application asphalt) mm (concrete application) or 6.3 mm (other pavement applications) and in coarse aggregates
- the coarse aggregates comprise, on the one hand, a split with a grain size above the corresponding upper limit for crushed sands and up to 32 mm, gravel with a grain size> 32 mm 64 mm and grafting with a particle size> 64 mm.
- Isometric aggregates can, inter alia, have an advantageous effect on the processing properties and on the achievement of high ultimate strengths in building materials. Compared to naturally shaped aggregates cracked aggregates to a relevant extent have breaklines and surfaces.
- Crushing mechanisms are based on different stresses of the material during comminution.
- the material In baking and cone crushers, the material is stressed mainly by pressure and in impact crushers by impact and impact in single grain shredding. These types of stress lead to different grain shapes and different grain size distributions.
- Abrasive rocks eg quartzite, gabbro, granite, porphyry and similar hard rocks
- jaw crushers and cone crushers produce crushed products with a high proportion of flat, elongated grains (compare Stark, U .; Müller, A .: Effective Methods for Measuring the Grain Size and Grain Form.) (Finishing technique 45 (2004) No. 6).
- Stark, U .; Müller, A .: Effective Methods for Measuring the Grain Size and Grain Form.) (Finishing technique 45 (2004) No. 6).
- these anisotropic grains must therefore be sieved.
- a significant proportion of the total processed rocks falls as an inferior product in the form of flat, elongated grains in the fine and coarse range, which is not or only at low prices to market.
- a vertical impact crusher In order to reduce the accumulation of inferior product, a vertical impact crusher is often used in addition as a so-called "cubicizer” for the plate-like, elongated grains to obtain finished products with higher proportions of isometric grains.As is known, the impact crushing produces predominantly such isometric grains However, in order to produce different fractions due to the relatively steep particle size distribution, several crushing stages (crushers) are necessary, which further increases energy consumption.
- the NorTone Tau (Norway) Tau plant which is designed to produce high quality quartz diorite aggregates for road construction, consists of, for example, three cone crusher stages and an additional vertical impact crusher stage in a cubic capacity function.
- the third cone crusher stage contains a total of five cone crushers for different grain sizes of the aggregates to be produced.
- a total of eight crushers are now in use in this plant (see “Manufactured sand in concrete - effect of particle shape on workability", COIN project report No. 34 (2011), SINTEF Building and Infrastructure, Norway ).
- horizontal impact crushers For crushing medium-hard rocks, such as limestone, dolomite, basalt, etc., horizontal impact crushers can be used. They provide high-cuboid shredded products and therefore isometric grain shapes. Disadvantages of these horizontal impact crushers are high costs for wearing materials and limited availability because of relatively frequently required maintenance. For the production of crushed sand with isometric grain shapes, an additional vertical impact crusher is usually used as a third or fourth crushing stage as a cubicizer, which is followed by two to three crushers, which are required for the production of correspondingly small particle sizes. Disadvantages of such plants are a relatively high energy consumption (additional machines with peripherals) and a high proportion of rock flour after cubing, for which there is usually no further use as a product and thus represents waste.
- a process for the production of crushed sand from moist rock material, for example from gravel washing, is known from EP 1 681 392 A1.
- the wet rock is first dried, then crushed in a jaw crusher and finally classified to separate the crushed fractions of ultrafine grain.
- By taking place before the crushing drying is to prevent the initially adhering externally to the rock coarse moisture is distributed during the breaking process on the freshly formed particle surfaces and there binds the resulting during comminution Feinstkorn.
- the so-called Gutbettzerkleintation is known in which the feed material is fed to the crushing device that this in the crushing gap, for example, the nip of a so-called high-bed or high-pressure roll mill, in Form of a bulk material is present, which means that the particles of the feedstock are pressed under high pressure against each other and thereby crushed.
- the comminution product emerging from the high-pressure bed mill is to a large extent in the form of agglomerates (so-called "scabs”) which, however, disagglomerate with comparatively little expenditure of energy to let.
- the comminution of the fine bed is basically characterized by a high energy efficiency.
- the invention has the object underlying to provide a way to produce high-quality aggregates with isometric as possible grain shapes of particular hard and medium-hard rocks.
- the greatest possible reduction of dust generated during production (rock flour) the lowest possible energy consumption for carrying out the process and the lowest possible wear of the plant used for this purpose should be achieved.
- the invention is based on the finding that in the application of the well-known comminution a comminuted product with a broad particle size distribution and on the other with a very high proportion (often around 98%) of isometric particle shapes both in the coarse and fine range can. Since the Gutbettzerkleintation over individual crushing based on crushing process is also characterized by a high energy efficiency, the basic idea of the invention is to use the Gutbettzerkleintation advantageously for the production of aggregates with isometric grain shapes.
- a process according to the invention which serves to produce rock aggregates of rocks which are used as a finished product and separated into fractions of different particle sizes, is characterized in that the rocks are initially broken (in particular by means of a single comminution), subsequently at least partially further broken down by means of a comminution and subsequently classified in order to separate the different fractions of the aggregates from one another.
- the concretion of the aggregates means "finished products” that they are not further processed (in particular further comminuted), at least in the context of the method according to the invention or a method in which the method according to the invention represents a section of the method Finished product aggregates basically no further processing is provided and these can therefore be used directly as, for example, aggregates for asphalt, concrete or similar materials.
- grain shapes corresponding to defined geometric specifications are regarded as "isometric.”
- grain shapes whose ratio of grain length (L) to grain thickness (E) according to DIN EN 933-4 is less than 3 are considered (L / E ratio ⁇ 3), where the "grain length” is the largest dimension of the respective grain, defined by the greatest distance of two mutually parallel planes tangent to the grain surface, and the "grain thickness” is the smallest dimension of the respective grain Korns, defined by the smallest distance from two each tangent to the grain surface, parallel to each other
- L / E ratio ⁇ 3 for the definition of isometric grain shapes (only) for coarse aggregates with grain sizes> 2 mm,> 4 mm or> 6.3 mm, while fine rock corrugations Grain sizes less than or equal to the selected limit (exclusive or additional
- the term "grain size” is understood to mean the greatest distance from two planes lying parallel to each other tangentially to the grain surface.
- the grain size of the aggregate to be produced is usually adjusted only for a fraction across the gap width between the jaws of the (jaw) crusher or the distance of the crusher cone to the static crusher shell (in a cone crusher).
- a comminution apparatus by means of a change in the grinding pressure, the roller speed and the grinding gap allows a flexible adaptation of the crushing parameters for a plurality of fractions of the comminuted product to the specific material properties of the feedstock and the desired product properties of the comminution product and to the material throughput.
- the pressure in the Mahlspalter can be increased.
- a change in the operating conditions can thus be used to adapt and in particular dynamic change in the particle size distribution of the products.
- Another advantage of the use according to the invention of a comminution for further breaking of the rocks is the relatively low wear on the rollers or rollers of the used Gutbettzerklein mecanicsvorplatz compared to wear in a single grain size reduction in, for example, a jaw or cone crusher. As a result, correspondingly long service life for the Gutbettzerklein réellesvortechnisch and lower expenses for spare parts are guaranteed.
- the rocks are broken up by means of the comminution of the comminuted material and, consequently, no crushing operation follows the comminution of the comminuted material.
- This is made possible by the broad particle size distribution and by the high proportion (often around 98%) of isometric grain shapes in the comminution product of the comminuted bed.
- a further processing subsequent to the comminution, and in particular further processing, is therefore generally not required for the use of the aggregates as finished products.
- a pressure of at most 75 bar, preferably between 5 bar and 50 bar and particularly preferably between 10 bar and 30 bar in the good bed is generated.
- This pressure range is sufficient to reliably achieve the desired breaking of the rocks, but at the same time not too high, thereby further avoiding further damage to the aggregates, in particular cracks in the grains. It should be emphasized that this pressure range is well below the pressure generated in the known applications of the comminution for grinding, for example, cement or cement raw meal (above 500 bar and usually between 1000 bar and 3000 bar).
- the rocks up to a rock size (largest distance of two each tangential to the rock surface, mutually parallel planes) of a maximum of 400 mm, preferably between 50 mm and 350 mm and more preferably between 100 mm and 200 mm are pre-broken.
- This can represent an advantageous size range for the rocks serving as feed material for the comminution grinding.
- this can be achieved in a single crushing passage in the context of Gutbettzerkleintation further breaking of the rocks up to the intended for the finished product aggregates maximum grain sizes.
- the intended maximum grain size may be, for example, about 32 mm.
- a first of the at least two fractions of the aggregates may preferably comprise grains having a maximum grain size of 4 mm, while a second of the fractions may comprise grains having a grain size of> 4 mm to preferably about 32 mm.
- the further breaking of the rocks as part of the comminution can lead to the formation of the aggregates comprising agglomerates.
- the aggregates are deagglomerated after further breaking by means of comminution and before classifying.
- the system according to the invention can for this purpose comprise a deagglomerating device, for example in the form of a basically known drum deagglomerator.
- the classifying device and the deagglomerating device may also be integrally formed.
- moving screen devices are suitable both for deagglomerating and for classifying.
- the rocks in particular during further breakage by means of the comminution, dried.
- the plant according to the invention may comprise a drying device for this purpose.
- rock flour can be dissolved and removed from the rocks or grains of the aggregates.
- the system according to the invention may comprise a corresponding washing device for washing.
- the washing device as a basically known washing drum, the preferably provided process steps of deagglomerating and washing can advantageously be carried out simultaneously and / or in a single device.
- these constituents may be rocks whose rock sizes are still above a defined maximum value for the feedstock for comminution.
- these constituents may be grains whose grain size is already smaller than the maximum grain size intended for the finished products and which may also already have an isometric grain shape.
- the pre-crushed rocks are already pre-classified before continuing in the high-grade bed in order to filter out corresponding rocks or grains from the feed material for the comminution grinding. Filtered out rocks can be re-broken in the crushing device.
- Filtered grains can be used directly as a finished product, which can reduce the amount of feed as much as possible, which can have a positive effect on the energy consumption in the context of comminution.
- the system according to the invention can for this purpose comprise a corresponding pre-classifying device.
- the system according to the invention can advantageously be a good bed roller mill (also called high-pressure roller press) or vertical roller mill can be used.
- the classifying device of The system according to the invention may preferably comprise a screening device and / or a classifier, in particular a vortex and / or cross-flow classifier.
- the breaking device may furthermore preferably be designed as an impact crusher, jaw crusher, hammer crusher or cone crusher. With several crushing devices, combinations thereof can also be used.
- the inventive method is advantageously for the production of aggregates in fractions with different particle sizes of natural mineral rocks, such as limestone, dolomite, basalt, quartzite, gabbro, granite, porphyry, and / or gravel, from slags from iron or steel production and / or made of old concrete.
- natural mineral rocks such as limestone, dolomite, basalt, quartzite, gabbro, granite, porphyry, and / or gravel
- Fig. 1 Plotmaschineskennlay in a graph of aggregates of grain sizes between 4 mm and 16 mm fraction comprising fractionated by separate Gutbettzerkleintation of quartzite, limestone and basalt at different process parameters;
- FIG. 2 grain shape indices for the quartzite aggregates according to FIG. 1 in comparison to the quartzite feedstock
- FIG. 3 shows the particle shape characteristics for the limestone aggregates according to FIG. 1 in comparison to the limestone feedstock
- Fig. 4 Kornformkennplace for basalt aggregates of Figure 1 in comparison to the basalt feed
- Fig. 5 shows the L / E ratios for four fractions of fine aggregates made by limestone crushed bedding in comparison to the corresponding L / E ratios of natural sand;
- FIG. 6 shows the sphericity characteristics for the four fractions according to FIG. 5 in comparison to the corresponding sphericity characteristics of natural sand;
- FIG. 7 shows a schematic representation of a plant according to the invention for the production of aggregates in fractions of different grain sizes.
- Figs. 1 to 6 are graphs showing results of experiments in which prehistoric rocks of quartzite, limestone and basalt were separately crushed into aggregates in a high-grade bed mill under various operating conditions.
- FIG. 1 shows the platelet characteristics of the respective particle sizes between 4 mm and 16 mm comprising fractions of the aggregates of quartzite, limestone and basalt.
- the non-patterned bars in the diagrams indicate an operation of the good bed roller mill with a peripheral speed of the rotating driven roller of about 0.2 m / s and a pressure in the bed of about 10 bar, the left-hatched bar a peripheral speed of approx 0.2 m / s and a pressure of about 30 bar, the right-hatched bars a peripheral speed of about 0.2 m / s and a pressure of about 50 bar and the cross-hatched bars a peripheral speed of about 0.9 m / s and a pressure of about 30 bar.
- the platelet characteristics were determined according to DIN EN 933-3.
- the aggregates are classified in the best category FI 10 in accordance with DIN EN 933-3, according to which the content of platy grains in these comminution products is less than 10%. 2 to 4, the particle size indices of different fractions of the aggregates of quartzite (see Fig. 2) broken in the different operating conditions by means of the high-bed roller press, limestone (see Fig. 3) and basalt (see Fig .. 4) in comparison to the grain shape key figures of the associated objects of delivery (pre-crushed rocks by means of a jaw crusher).
- the non-patterned bars in the diagrams indicate the respective mean values for the grain shape indices from all the fractions associated therewith, the left-hatched bars the grain sizes from 4 mm to 8 mm fractions, the right-hatched bars the particle sizes from 8 mm to 16 mm fractions and the cross-hatched bars, the particle sizes of 16 mm to 32 mm fractions.
- the particle shape indices were determined in accordance with DIN EN 933-4. It can be seen that the content of nonisometric grains in these aggregates is always (clearly) below 10% and thus far below the corresponding value for the associated feedstock.
- FIG. 5 shows L / E ratios of four different fractions of fine aggregates crushed by bedding comminution (crushed sand).
- the values determined for the four fractions are connected by straight lines to form a course to visualize.
- FIG. 6 shows a corresponding comparison of the sphericity characteristics. It can be seen that good bed comminution can achieve L / E ratios and sphericity characteristics that are comparable to those of naturally rounded natural sand.
- FIG. 7 shows in a schematic representation a plant according to the invention for the production of aggregates serving as finished products in fractions of different particle sizes as well as the process performed thereby.
- rocks that can come directly from a quarry, transported by means of, for example, a truck 1 to a crushing device 2.
- the rocks are pre-crushed to produce a feed material for a crusher 2 downstream Gutbettzerklein mecanicsvoriques 3 (here in the form of a good bed roller mill).
- a pre-classifying device 4 is arranged, through which (for example by means of a screening process) the comminuted product originating from the crushing device 2 is preclassified to rocks whose rock sizes are above a defined limit value (eg 200 mm), of those whose rock sizes are below this limit (or equal to this limit).
- the relatively large rocks are then returned to the crushing device 2 to effect further comminution, while the relatively small rocks are fed to the bedding comminution device 3 as feedstock.
- the Gutbettzerklein mecanicsvorraum 3 the rocks are further broken and thereby generates aggregates with isometric to a large extent grain shapes and different grain sizes.
- the rocks are classified into a total of four fractions differing by different particle size ranges.
- the classifying device 5 may be formed as a multiple-screen device with a plurality of screen coverings arranged one above the other with a mesh width decreasing from top to bottom.
- This second fraction is stored as a first finished product from a coarse rock corona at a first storage bin 6.
- This third fraction is stored as a second finished product from a coarse aggregate at a second storage location 7.
- a fourth fraction of the aggregates falls whose grain sizes are below the minimum value for the grain size of the coarse aggregates.
- This third fraction is stored as a finished product of a fine aggregate (crushed sand) at a third storage place 8.
- a plurality of series-connected crushing device 2 may be provided. This can be achieved in particular a gradual breaking of the delivered stones from the quarry to reach the intended for the feed material for the bedding comminuting device 3 limit value of the grain size.
- a crushing device 2 which has passed through the rocks first for example as a jaw crusher and an adjoining crushing device 2 can be designed, for example, as a cone crusher.
- the system illustrated in FIG. 7 may optionally comprise further components (shown in dashed lines).
- a disagglomerating device 9 may be arranged, are disagglomerated by the agglomerations that arise in the context of comminution.
- a washing device 10 may be provided, can be washed out by the rock flour from the crushed product of the bedding comminution device 3.
- the deagglomerating device 9 and the washing device 10 may also be integrally formed in a device (eg a washing drum).
- a drying device may be provided, through which the rocks and / or aggregates are dried, for example, during further breaking in the material bed comminution device. This can be done for example by means of hot air.
- the drying device may be integrated into the material bed comminution device 3 for this purpose.
- the crushing device (s) 2 can also be preceded by a device 11 for removing adhesions (eg morass) from the delivered rocks.
- This device 11 may be formed, for example, in the form of a coarse screen.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014115975.6A DE102014115975A1 (en) | 2014-11-03 | 2014-11-03 | Process for the production of aggregates separated into fractions of different particle sizes |
PCT/EP2015/075104 WO2016071197A1 (en) | 2014-11-03 | 2015-10-29 | Method for producing gravels separated into fractions of different grain sizes |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3215272A1 true EP3215272A1 (en) | 2017-09-13 |
EP3215272B1 EP3215272B1 (en) | 2020-05-27 |
Family
ID=54608487
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15797608.5A Active EP3215272B1 (en) | 2014-11-03 | 2015-10-29 | Method for manufacturing aggregates separated in fractions of different grain sizes |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3215272B1 (en) |
DE (1) | DE102014115975A1 (en) |
DK (1) | DK3215272T3 (en) |
WO (1) | WO2016071197A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107890942A (en) * | 2017-11-16 | 2018-04-10 | 徐继传 | A kind of ore pulverizer |
CN110124836B (en) * | 2019-05-24 | 2021-04-27 | 赣州嘉通新材料有限公司 | Novel process for extracting high-content rare earth |
BE1029729B1 (en) * | 2021-09-03 | 2023-04-03 | Thyssenkrupp Ind Solutions Ag | Device and method for processing old concrete |
WO2023031076A1 (en) * | 2021-09-03 | 2023-03-09 | Thyssenkrupp Industrial Solutions Ag | Apparatus and method for processing old concrete |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DD123432A1 (en) * | 1975-12-10 | 1976-12-20 | ||
DE3337615A1 (en) * | 1983-10-15 | 1985-04-25 | Klöckner-Humboldt-Deutz AG, 5000 Köln | Process and plant for comminuting, grinding and treating raw mineral materials, such as ores and the like, which are wet from the mine or naturally |
DE3719251A1 (en) * | 1987-06-10 | 1988-12-22 | Kloeckner Humboldt Deutz Ag | METHOD AND SYSTEM FOR CONTINUOUS PRESSURE REDUCTION OF SPROEDEN GROSSGUTES |
DE19512509B4 (en) * | 1995-04-04 | 2009-07-30 | Polysius Ag | Process for comminuting ore material |
DE19738228A1 (en) * | 1997-09-02 | 1999-03-04 | Kloeckner Humboldt Wedag | Process for recycling grinding brittle material and grinding plant for this |
US5992774A (en) * | 1998-03-16 | 1999-11-30 | Insun Company, Ltd. | Method and system for recycling construction waste articles |
DE10336801B4 (en) * | 2003-08-11 | 2015-02-12 | Thyssenkrupp Industrial Solutions Ag | Process and plant for grinding iron ore or iron ore concentrate |
EP1681392A1 (en) | 2005-01-17 | 2006-07-19 | Hochschule Rapperswil | Manufacturing of fine grain poor crushed sand |
WO2010072276A1 (en) * | 2008-12-23 | 2010-07-01 | Maschinenfabrik Köppern Gmbh & Co. Kg | Method and apparatus for comminuting mineral ground product |
-
2014
- 2014-11-03 DE DE102014115975.6A patent/DE102014115975A1/en not_active Ceased
-
2015
- 2015-10-29 DK DK15797608.5T patent/DK3215272T3/en active
- 2015-10-29 WO PCT/EP2015/075104 patent/WO2016071197A1/en active Application Filing
- 2015-10-29 EP EP15797608.5A patent/EP3215272B1/en active Active
Also Published As
Publication number | Publication date |
---|---|
WO2016071197A1 (en) | 2016-05-12 |
EP3215272B1 (en) | 2020-05-27 |
DK3215272T3 (en) | 2020-08-31 |
DE102014115975A1 (en) | 2016-05-19 |
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