CA1177805A - Apparatus for crushing relatively soft material such as coal - Google Patents
Apparatus for crushing relatively soft material such as coalInfo
- Publication number
- CA1177805A CA1177805A CA000398592A CA398592A CA1177805A CA 1177805 A CA1177805 A CA 1177805A CA 000398592 A CA000398592 A CA 000398592A CA 398592 A CA398592 A CA 398592A CA 1177805 A CA1177805 A CA 1177805A
- Authority
- CA
- Canada
- Prior art keywords
- crushed
- conveyor
- coal
- container
- screening
- 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.)
- Expired
Links
Landscapes
- Disintegrating Or Milling (AREA)
Abstract
Abstract of Disclosure Apparatus for crushing relatively soft material such as coal, said apparatus comprising a container for material entering the apparatus and meant to be crushed, and within said container a conveyor, which feeds the material to be crushed in between crush rolls belonging to the apparatus. The conveyor consists of a screening roll set, through which the material conforming to the permissible grain size is screened, and that immediately after the crush rolls there is a screening means by which the crushed material is separated from uncrushed, undesirable objects such as stones and pieces of wood.
Description
'78(~
~ 1--The present invention concerns apparatus for crushing relatively soft material such as coal, said apparatus comprising a container for the material arriving in the apparatus and meant to be crushed, and a conveyor within said container, feeding the material to be crushed in between crush rolls belonging to the apparatus.
The ob~ect of this invention is to provide a new type of apparatus which presents remarkable advantages over any`apparatus known in the art. The apparatus of the invention is characterized in that the conveyor consists of a set of screening rolls, through which the material conforming to the permissible grain size is screened, and that immedi~tely after the crush ~olls there is a screening m~ans by which the ~rushed material is separated from uncrushable, undesirable objects such as stones-and wood parts. By the aid of the invention the size and power of the crush rolls can be reduced because a very large proportion of the material to be crushed is screened out earlier already and is not compelled to pass through the rolls. The screening means located after the crush rolls screens out the undesirable components in the same apparatus, and no separate screening means is therefore needed.
One favourable embodiment of the invention iG characterized in that the conveyor is upwardly inclined in the conveying direction a few degrees.
When the mass flow is set in a slightly ascending motion, this enhances the screening effect.
Another embodiment of the invention is characterized in that there is a precrusher in association with the conveyor. The prescrusher ~lreaks up the largest pieces, and at the same time smaller crushed pieces are produced, which become separated with the aid of the screening roll set~
The invention is described in the following with the aid of an example with reference being made to the attached drawing, presenting the apparatus of the invention in sectional view.
The apparatus comprises a container 1 for coal material arriving in the apparatus and which is meant to be crushed. The container houses a roll conveyor 2, feeding coal material to be crushed in between crush rolls 3,4 belonging to the apparatus. After the crush rolls there is disposed a screening means 5 by which the crushed coal 6 is separated from uncrushed .' ~
r 7'i~VS
stones and wood pieces 7. The conveyor consists of a set of screening rolls, through which the pieces 8 of the material arriving in the container 1 which have been crushed to final size are screened out. The conveyor is up~ardly running in the conveying direction to the extent of a few degrees. In connection with the conveyor 2 there is a precrusher 9, which crushes the largest pieces to be suitabIe to enter the crush rolls.
The coal material to be crushed is supplied into the container 1 belonging to the apparatus, where the screening roll set 2 separates the pieces of coal 8 found in the material which are of suitable size already. The rest of the coal material goes forward to the precrusher 9, where the largest pieces are crushed to smaller size. In connection with the precrushing also smaller pieces of coal 10 are pr~duced, which are screened in the screening roll set and fall therethrough. The actual crushing takes place between the crush rolls 3,4. Stones and pieces of wood are also carried in between the rolls 3,4, and ln that event one of the rolls, 4, yields elastically, enough to let such pieces pass through. These ~ieces are separated by a screening ~eans 5 located beneath; All crushed pieces end up in a fluted conveyor (not depicted in the figure) under the apparatus and are carried onward thereby.
Since a very great part of the coal material already as it arrives in the apparatus is in such form that it can be screened with the screening roll set 2 directly through the apparatus and therefore need not go through the crush rolls 3,4, the power requirements of the crush rolls is remarkably less than in any apparatus of prior art.
It is obvious to a person skilled in the art that various embodiments of the invention may vary within the scope of the claims stated below.
~ 1--The present invention concerns apparatus for crushing relatively soft material such as coal, said apparatus comprising a container for the material arriving in the apparatus and meant to be crushed, and a conveyor within said container, feeding the material to be crushed in between crush rolls belonging to the apparatus.
The ob~ect of this invention is to provide a new type of apparatus which presents remarkable advantages over any`apparatus known in the art. The apparatus of the invention is characterized in that the conveyor consists of a set of screening rolls, through which the material conforming to the permissible grain size is screened, and that immedi~tely after the crush ~olls there is a screening m~ans by which the ~rushed material is separated from uncrushable, undesirable objects such as stones-and wood parts. By the aid of the invention the size and power of the crush rolls can be reduced because a very large proportion of the material to be crushed is screened out earlier already and is not compelled to pass through the rolls. The screening means located after the crush rolls screens out the undesirable components in the same apparatus, and no separate screening means is therefore needed.
One favourable embodiment of the invention iG characterized in that the conveyor is upwardly inclined in the conveying direction a few degrees.
When the mass flow is set in a slightly ascending motion, this enhances the screening effect.
Another embodiment of the invention is characterized in that there is a precrusher in association with the conveyor. The prescrusher ~lreaks up the largest pieces, and at the same time smaller crushed pieces are produced, which become separated with the aid of the screening roll set~
The invention is described in the following with the aid of an example with reference being made to the attached drawing, presenting the apparatus of the invention in sectional view.
The apparatus comprises a container 1 for coal material arriving in the apparatus and which is meant to be crushed. The container houses a roll conveyor 2, feeding coal material to be crushed in between crush rolls 3,4 belonging to the apparatus. After the crush rolls there is disposed a screening means 5 by which the crushed coal 6 is separated from uncrushed .' ~
r 7'i~VS
stones and wood pieces 7. The conveyor consists of a set of screening rolls, through which the pieces 8 of the material arriving in the container 1 which have been crushed to final size are screened out. The conveyor is up~ardly running in the conveying direction to the extent of a few degrees. In connection with the conveyor 2 there is a precrusher 9, which crushes the largest pieces to be suitabIe to enter the crush rolls.
The coal material to be crushed is supplied into the container 1 belonging to the apparatus, where the screening roll set 2 separates the pieces of coal 8 found in the material which are of suitable size already. The rest of the coal material goes forward to the precrusher 9, where the largest pieces are crushed to smaller size. In connection with the precrushing also smaller pieces of coal 10 are pr~duced, which are screened in the screening roll set and fall therethrough. The actual crushing takes place between the crush rolls 3,4. Stones and pieces of wood are also carried in between the rolls 3,4, and ln that event one of the rolls, 4, yields elastically, enough to let such pieces pass through. These ~ieces are separated by a screening ~eans 5 located beneath; All crushed pieces end up in a fluted conveyor (not depicted in the figure) under the apparatus and are carried onward thereby.
Since a very great part of the coal material already as it arrives in the apparatus is in such form that it can be screened with the screening roll set 2 directly through the apparatus and therefore need not go through the crush rolls 3,4, the power requirements of the crush rolls is remarkably less than in any apparatus of prior art.
It is obvious to a person skilled in the art that various embodiments of the invention may vary within the scope of the claims stated below.
Claims (3)
1. Apparatus for crushing relatively soft material such as coal, said apparatus comprising a container for material entering the apparatus and meant to be crushed, and within said container a conveyor feeding the material to be crushed in between crush rolls belonging to the apparatus, wherein the conveyor consists of a screening roll set through which the material conforming to permissible grain size is screened, and that immediately after the crush rolls there is a screening means by which the crushed material is separated from uncrushed, undesirable objects such as stones and pieces of wood.
2. Apparatus according to claim 1, wherein the conveyor is upwardly inclined a few degress in the conveying direction.
3. Apparatus according to claim 1, wherein in association with the conveyor there is a precrusher.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000398592A CA1177805A (en) | 1982-03-17 | 1982-03-17 | Apparatus for crushing relatively soft material such as coal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000398592A CA1177805A (en) | 1982-03-17 | 1982-03-17 | Apparatus for crushing relatively soft material such as coal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1177805A true CA1177805A (en) | 1984-11-13 |
Family
ID=4122321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000398592A Expired CA1177805A (en) | 1982-03-17 | 1982-03-17 | Apparatus for crushing relatively soft material such as coal |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1177805A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101972684A (en) * | 2010-09-26 | 2011-02-16 | 常熟仕名重型机械有限公司 | Prescreening mechanism of single-section hammer type screening crusher |
-
1982
- 1982-03-17 CA CA000398592A patent/CA1177805A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101972684A (en) * | 2010-09-26 | 2011-02-16 | 常熟仕名重型机械有限公司 | Prescreening mechanism of single-section hammer type screening crusher |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEC | Expiry (correction) | ||
| MKEX | Expiry |