GB1262670A - Process and plant for grinding and sifting a granular material, more particularly cement - Google Patents
Process and plant for grinding and sifting a granular material, more particularly cementInfo
- Publication number
- GB1262670A GB1262670A GB04268/69A GB1426869A GB1262670A GB 1262670 A GB1262670 A GB 1262670A GB 04268/69 A GB04268/69 A GB 04268/69A GB 1426869 A GB1426869 A GB 1426869A GB 1262670 A GB1262670 A GB 1262670A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cement
- fine
- stream
- conduit
- fraction
- 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
- 239000004568 cement Substances 0.000 title abstract 16
- 238000000034 method Methods 0.000 title abstract 2
- 239000008187 granular material Substances 0.000 title 1
- 238000012986 modification Methods 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 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
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
- B02C17/183—Feeding or discharging devices
- B02C17/1835—Discharging devices combined with sorting or separating of material
- B02C17/184—Discharging devices combined with sorting or separating of material with separator arranged in discharge path of crushing zone
- B02C17/1845—Discharging devices combined with sorting or separating of material with separator arranged in discharge path of crushing zone with return of oversize material to crushing zone
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Disintegrating Or Milling (AREA)
- Crushing And Grinding (AREA)
- Combined Means For Separation Of Solids (AREA)
Abstract
1,262,670. Grinding and sifting cement. ESCHER WYSS Ltd. 18 March, 1969 [21 March, 1968; 24 Dec., 1968], No. 14268/69. Headings B2A and B2H. In a process for grinding and sifting cement in a closed circuit according to which raw cement is ground and the ground cement is thereupon sifted and divided into a coarse cement stream and a fine cement stream, the coarse cement stream being returned to the raw cement stream and the fine cement forming the finished product, a partial stream is taken from the fine cement stream and is re-introduced into the closed circuit. In Fig. 1, raw cement is supplied through a conduit 5 to the inlet 4 of a grinding mill 1 the outlet 7 of which is connected to a bucket elevator 6 which delivers the ground cement to a sifter 2 from which the coarse fraction is returned to the mill 1 via a conduit 3 and the fine fraction is directed via a conduit 3 to an adjustable selector valve 9 from which a portion of the fine fraction is discharged as the desired product through a conduit 10 and another portion is returned to the bucket elevator 6 via a conduit 11. In modifications, the other portion of the fine fraction may be led (a) to another elevator which conveys it to the sifter inlet, (b) to the mill inlet, or (c) partly to the mill inlet and partly to a further selector valve from which a fine-fraction portion is discharged as the desired product and another portion is returned to the elevator. The sifter may be of the type shown in Figs. 5 and 6. Raw cement is scattered in an inner chamber 53 by a plate 55 which is rotated with a vaned selector wheel 56 and a fan 57 by a common drive 58. An upward air current induced by the fan entrains the fine cement through the selector wheel and into a separating chamber 54 from which the air is recirculated into the chamber 53 through louvres 59. The degree of fineness of the fine cement is controlled by having selector vanes 517-519 of different radial dimensions and by radially movable slide elements 511.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH421168A CH480093A (en) | 1968-03-21 | 1968-03-21 | Method and device for grinding and sifting granular material, in particular cement |
| CH1928268A CH505651A (en) | 1968-03-21 | 1968-12-24 | Device for grinding and sifting a granular material, in particular cement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1262670A true GB1262670A (en) | 1972-02-02 |
Family
ID=25694931
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB04268/69A Expired GB1262670A (en) | 1968-03-21 | 1969-03-18 | Process and plant for grinding and sifting a granular material, more particularly cement |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3586248A (en) |
| CH (1) | CH505651A (en) |
| DE (1) | DE1913440A1 (en) |
| DK (1) | DK136847B (en) |
| FR (1) | FR2004364A1 (en) |
| GB (1) | GB1262670A (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2364277C2 (en) * | 1973-12-22 | 1983-03-17 | O & K Orenstein & Koppel Ag, 1000 Berlin | Process for the production of a regrind |
| DE3124649A1 (en) * | 1981-06-23 | 1983-01-05 | Krupp Polysius Ag, 4720 Beckum | METHOD FOR CONTROLLING A MILLING PLANT |
| DE3152014A1 (en) * | 1981-12-31 | 1983-07-14 | Engelbrecht + Lemmerbrock Gmbh + Co, 4520 Melle | Method for rough-grinding corn-on-the-cob mix |
| US4536980A (en) * | 1982-09-24 | 1985-08-27 | Ward Fleming | Pin screen |
| EP0112022A3 (en) * | 1982-12-16 | 1986-09-03 | F.L. Smidth & Co. A/S | Method of and plant for grinding pulverulent or granular materials |
| US4654989A (en) * | 1983-08-30 | 1987-04-07 | Ward Fleming | Vertical three-dimensional image screen |
| EP0242218B1 (en) * | 1986-04-17 | 1990-08-01 | Babcock-Hitachi Kabushiki Kaisha | Coal-water slurry producing system |
| GB8716213D0 (en) * | 1987-07-09 | 1987-08-12 | Alcan Int Ltd | Producing fine particles |
| DE3813661A1 (en) * | 1988-04-22 | 1989-11-02 | Krupp Polysius Ag | MILLING PLANT |
| DE10010406A1 (en) * | 2000-03-03 | 2001-09-06 | Kloeckner Humboldt Wedag | Process and plant for the two-stage screening of granular material |
| DE10056158C5 (en) * | 2000-11-13 | 2014-11-13 | Thyssenkrupp Industrial Solutions Ag | Process and plant for the production of fine material |
| CN105833974A (en) * | 2016-04-29 | 2016-08-10 | 四川亚东水泥有限公司 | Cement production system based on opened and closed circuit joint control and process of cement production system |
| CN117451586B (en) * | 2023-12-22 | 2024-03-19 | 山东恒建工程检测有限公司 | Highway construction cement performance detection device and method thereof |
-
1968
- 1968-12-24 CH CH1928268A patent/CH505651A/en unknown
-
1969
- 1969-03-10 US US805752A patent/US3586248A/en not_active Expired - Lifetime
- 1969-03-10 FR FR6906659A patent/FR2004364A1/fr not_active Withdrawn
- 1969-03-12 DE DE19691913440 patent/DE1913440A1/en not_active Withdrawn
- 1969-03-18 GB GB04268/69A patent/GB1262670A/en not_active Expired
- 1969-03-20 DK DK153169AA patent/DK136847B/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| DK136847C (en) | 1978-05-16 |
| CH505651A (en) | 1971-04-15 |
| DE1913440A1 (en) | 1970-01-02 |
| US3586248A (en) | 1971-06-22 |
| DK136847B (en) | 1977-12-05 |
| FR2004364A1 (en) | 1969-11-21 |
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