EP1862220A1 - Mill for the grinding of minerals - Google Patents
Mill for the grinding of minerals Download PDFInfo
- Publication number
- EP1862220A1 EP1862220A1 EP07109396A EP07109396A EP1862220A1 EP 1862220 A1 EP1862220 A1 EP 1862220A1 EP 07109396 A EP07109396 A EP 07109396A EP 07109396 A EP07109396 A EP 07109396A EP 1862220 A1 EP1862220 A1 EP 1862220A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- minerals
- grinding
- mill
- fitted
- ground
- 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.)
- Withdrawn
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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
- B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
- B02C13/13—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft and combined with sifting devices, e.g. for making powdered fuel
Definitions
- the present invention refers to a mill for the grinding of minerals, such as stones and aggregates in general, in order to reduce them to a suitable size for their use as construction material, such as gravel, coarse aggregate or to obtain cements, concretes and such like.
- the object of the invention focuses on fitting means to select the granulometry, that is to say, the size of grain in the final ground product.
- These mills have an outlet opening at the bottom of the grinding chamber, out of which the ground minerals fall.
- the mill for the grinding of minerals proposed by the invention solves the aforementioned problem by fitting means to select the granulometry, that is to say, the size of grain in the final ground product.
- the mill for the grinding of minerals is that of the type made up of a grinding chamber fitted with an opening through which the minerals enter and another for their outlet, the walls of which are lined with several robust teeth against which the minerals to be ground are projected by means of a rotor that rotates inside, having an adjustable sizing screen fitted to the outlet of the grinding chamber to select the granulometry of the ground fragments.
- the aforementioned sizing screen is made up of a number of parallel metallic bars fitted to a set of guides with corresponding pipe grooves into which the bars are inserted.
- the sizing screen is made up of a metallic plate fitted with a number of openings with the same diameter, placed on a removable fastening guide.
- the fastening guide shall have a curvilinear shape following the grinding chamber's enveloping casing.
- the mill for the grinding of minerals is of the type comprising a grinding chamber 1, fitted with an opening 2 through which the minerals to be ground enter and an outlet opening 3 to eject them once ground.
- the inside of the grinding chamber 1 is lined with a number of robust teeth 4, known as "palate”, against which the minerals are projected and then ground by means of a rotor 5 that rotates inside the chamber.
- a sizing screen 6 made up of a number of parallel metallic bars 7, is fitted to the outlet opening 3.
- the fastening of these metallic bars 7 is carried out by way of a set of guides 8, which have a curvilinear shape following the grinding chamber's enveloping casing.
- the aforementioned guide 8 is fitted with a number of grooves 9 into which the metallic bars 7 are inserted through slots 10 made at their ends. So that the opening defined between the consecutive metallic bars 7 is approximately parallel, a conical embodiment design has been used.
- Another embodiment of the sizing screen 6 consists of using a perforated metallic plate, not shown in the drawings, at the outlet opening 3, which has the same curvilinear shape as the guides 8.
- the perforated plate is replaced by another one having openings of a different diameter.
- the mill shall eject the ground minerals whose size is less than the opening of the sizing screen.
- the rest of the larger fragments shall continue rotating inside the grinding chamber 1, driven by the blades 11 of the rotor 5, to be ground again in the following laps until their size is less than that of the screen's opening 6, at which moment they will be ejected from the grinding chamber.
- the sizing screen 6 is fitted to the outlet opening 3 and has a curvilinear shape following the grinding chamber's enveloping casing, so that the fragments smaller than the opening of the screen continue their next circular lap inside the grinding chamber 1, without causing undesired blocking or accumulation.
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
- Crushing And Pulverization Processes (AREA)
Abstract
Description
- The present invention refers to a mill for the grinding of minerals, such as stones and aggregates in general, in order to reduce them to a suitable size for their use as construction material, such as gravel, coarse aggregate or to obtain cements, concretes and such like.
- The object of the invention focuses on fitting means to select the granulometry, that is to say, the size of grain in the final ground product.
- On the market, there are already mills for the grinding of minerals, basically intended for the construction sector, made up of a chamber whose inner walls are lined with a number of robust teeth, against which the minerals to be ground are projected by means of a rotor that rotates inside. The above-mentioned grinding chamber has an inlet opening, generally at the top, which the minerals enter through for their crushing and grinding by being projected against the inner walls, and by the rotation of the rotor blades that traps them against the teeth in the walls.
- These mills have an outlet opening at the bottom of the grinding chamber, out of which the ground minerals fall.
- Since the ground minerals are freely expelled by the force of gravity through the bottom opening, the granulometry of the final product is very different and a later classification process is needed to be carried out in order to grind the fragments that are too large and unsuitable for the use in question again.
- Another disadvantage of this type of mills is that they do not allow small mineral fragments below a specific granulometry to be ground, since they are expelled through the outlet opening of the chamber without being crushed, due precisely to their restricted size. This leads to waste quantities of ground material with excessive granulometry, unsuitable for use in the construction sector.
- The mill for the grinding of minerals proposed by the invention solves the aforementioned problem by fitting means to select the granulometry, that is to say, the size of grain in the final ground product.
- To this end, and in a more concrete way, the mill for the grinding of minerals is that of the type made up of a grinding chamber fitted with an opening through which the minerals enter and another for their outlet, the walls of which are lined with several robust teeth against which the minerals to be ground are projected by means of a rotor that rotates inside, having an adjustable sizing screen fitted to the outlet of the grinding chamber to select the granulometry of the ground fragments.
- The aforementioned sizing screen is made up of a number of parallel metallic bars fitted to a set of guides with corresponding pipe grooves into which the bars are inserted.
- Another possibility is that the sizing screen is made up of a metallic plate fitted with a number of openings with the same diameter, placed on a removable fastening guide.
- As much in one case as the other, the fastening guide shall have a curvilinear shape following the grinding chamber's enveloping casing.
- Where metallic bars are used, they shall be conically embodied so that the outlet holes are approximately parallel.
- To select the granulometry of the final product, we only have to replace the metallic bars that make up the sizing screen by others with a different width, to increase or reduce the outlet opening of the screen. Where using a perforated metallic plate, it shall be replaced by another one fitted with openings of another diameter.
- To complete the description that is being given and in order to help give a better understanding of the invention's characteristics, with the idea to provide an essential example of its practical undertaking, a set of drawings with an illustrative, non-restrictive character is attached as an integral part of the aforementioned description, showing the following:
- Figure 1 shows a properly divided vertical section of the mill aimed at in the invention, where the inside of the grinding chamber, the rotor and arrangement of the sizing screen fitted to the outlet opening may be seen.
- Figure 2 shows a detailed plant view of the sizing screen made up of metallic bars fitted to the guides.
- Figure 3 shows a vertical section of the sizing screen shown in the previous figure.
- Figure 4 shows a vertical section of the metallic bars that make up the sizing screen.
- In view of the outlined figures, it may be seen that the mill for the grinding of minerals is of the type comprising a grinding chamber 1, fitted with an opening 2 through which the minerals to be ground enter and an outlet opening 3 to eject them once ground. The inside of the grinding chamber 1 is lined with a number of robust teeth 4, known as "palate", against which the minerals are projected and then ground by means of a rotor 5 that rotates inside the chamber.
- To select the granulometry of the ground mineral, a sizing screen 6, made up of a number of parallel metallic bars 7, is fitted to the outlet opening 3.
- The fastening of these metallic bars 7 is carried out by way of a set of guides 8, which have a curvilinear shape following the grinding chamber's enveloping casing. The aforementioned guide 8 is fitted with a number of grooves 9 into which the metallic bars 7 are inserted through slots 10 made at their ends. So that the opening defined between the consecutive metallic bars 7 is approximately parallel, a conical embodiment design has been used.
- Due to the arrangement of the guides 8, we may replace the metallic bars 7 by others with a different width to increase or reduce the screen's outlet opening.
- Another embodiment of the sizing screen 6 consists of using a perforated metallic plate, not shown in the drawings, at the outlet opening 3, which has the same curvilinear shape as the guides 8. In this case, to select the granulometry of the ground mineral, the perforated plate is replaced by another one having openings of a different diameter.
- Thus, due to the sizing screen 6 fitted to the outlet opening 3, the mill shall eject the ground minerals whose size is less than the opening of the sizing screen. The rest of the larger fragments shall continue rotating inside the grinding chamber 1, driven by the blades 11 of the rotor 5, to be ground again in the following laps until their size is less than that of the screen's opening 6, at which moment they will be ejected from the grinding chamber.
- In the design, the sizing screen 6 is fitted to the outlet opening 3 and has a curvilinear shape following the grinding chamber's enveloping casing, so that the fragments smaller than the opening of the screen continue their next circular lap inside the grinding chamber 1, without causing undesired blocking or accumulation.
Claims (5)
- Mill for the grinding of minerals of the type made up of a grinding chamber fitted with an opening through which the minerals enter and another for their outlet, the walls of which are lined with several robust teeth against which the minerals to be ground are projected by means of a rotor that rotates inside, characterised by having an adjustable sizing screen fitted to the outlet opening of the grinding chamber to select the granulometry of the ground fragments.
- Mill for the grinding of minerals, according to claim 1, characterised by the sizing screen being made up of a number of parallel metallic bars fitted to a set of guides with corresponding pipe grooves into which the bars are inserted.
- Mill for the grinding of minerals, according to claim 1, characterised by the sizing screen being made up of a metallic plate with a number of holes of the same diameter fitted to a removable fastening guide.
- Mill for the grinding of minerals, according to claim 2, characterized by the metallic bars having a conical embodiment.
- Mill for the grinding of minerals, according to claims 2 and 3, characterised by the fastening guides having a curvilinear shape following the grinding chamber's enveloping casing.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES200601269U ES1063091Y (en) | 2006-06-01 | 2006-06-01 | MILL FOR THE CRUSHING OF MINERALS |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1862220A1 true EP1862220A1 (en) | 2007-12-05 |
Family
ID=37054850
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07109396A Withdrawn EP1862220A1 (en) | 2006-06-01 | 2007-06-01 | Mill for the grinding of minerals |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1862220A1 (en) |
ES (1) | ES1063091Y (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102896019A (en) * | 2012-10-15 | 2013-01-30 | 马琳 | Sieving and crushing integrated machine |
CN112691727A (en) * | 2021-01-06 | 2021-04-23 | 石家庄凯达科技有限公司 | Rubbing crusher of useless battery screening process |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1338845A (en) * | 1918-01-28 | 1920-05-04 | Schutz Hawley Company | Wet-coal mill |
US3480214A (en) * | 1966-10-07 | 1969-11-25 | Franz Wageneder | Rotary disintegrator |
US5772134A (en) * | 1994-12-12 | 1998-06-30 | Bouldin & Lawson, Inc. | Recycling and solid material conversion apparatus and system |
-
2006
- 2006-06-01 ES ES200601269U patent/ES1063091Y/en not_active Expired - Fee Related
-
2007
- 2007-06-01 EP EP07109396A patent/EP1862220A1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1338845A (en) * | 1918-01-28 | 1920-05-04 | Schutz Hawley Company | Wet-coal mill |
US3480214A (en) * | 1966-10-07 | 1969-11-25 | Franz Wageneder | Rotary disintegrator |
US5772134A (en) * | 1994-12-12 | 1998-06-30 | Bouldin & Lawson, Inc. | Recycling and solid material conversion apparatus and system |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102896019A (en) * | 2012-10-15 | 2013-01-30 | 马琳 | Sieving and crushing integrated machine |
CN112691727A (en) * | 2021-01-06 | 2021-04-23 | 石家庄凯达科技有限公司 | Rubbing crusher of useless battery screening process |
Also Published As
Publication number | Publication date |
---|---|
ES1063091U (en) | 2006-10-01 |
ES1063091Y (en) | 2007-01-01 |
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Legal Events
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR |
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AX | Request for extension of the european patent |
Extension state: AL BA HR MK YU |
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17P | Request for examination filed |
Effective date: 20080114 |
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17Q | First examination report despatched |
Effective date: 20080218 |
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AKX | Designation fees paid |
Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20120103 |