GB657621A - Process for grinding and classifying organic materials - Google Patents
Process for grinding and classifying organic materialsInfo
- Publication number
- GB657621A GB657621A GB201148A GB201148A GB657621A GB 657621 A GB657621 A GB 657621A GB 201148 A GB201148 A GB 201148A GB 201148 A GB201148 A GB 201148A GB 657621 A GB657621 A GB 657621A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mill
- grinding
- ground
- whence
- spout
- 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
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
- 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
- B02C23/04—Safety devices
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Combined Means For Separation Of Solids (AREA)
- Disintegrating Or Milling (AREA)
- Crushing And Grinding (AREA)
Abstract
657,621. Grinding organic material. CLARK, G. M. (Agicide Laboratories, Inc.). Jan. 22, 1948, No. 2011. [Class 59) In a process of finely dividing material of an organic nature sensitive to oxygen and to elevated temperatures, the material, while in a grinding mill, is maintained in a volume ,of steam at super-atmospheric pressure by vaporizing water in the mill, whereby oxygen is excluded and the temperature kept below the critical value. Material, e.g. nutshell, from a hopper 14, Fig. 1, is carried by a screw conveyer 15 through a rotary seal valve 16 to a mill 10 where it is ground in steam at superatmospheric pressure between two contrarotating discs 11, 12, the ground material passing from the mill through an outlet 17 to an interrupted screw conveyer 18. Water is supplied to the mill at such a rate that it is immediately vaporized by the heat developed by the grinding action by a pipe 27 having a valve 26 controlled by a thermostat 24 in the mill outlet 17. A damper controlled vent pipe 22 maintains the required pressure in the mill. Heat may be supplied externally to the mill Water may be introduced into the mill along with the material to be ground. The regulation of the valve 26 may be made responsive to increase in amperage in the grinding motor circuit. The ground product may be carried from the conveyer 18 to a primary air classifier 26<SP>1</SP>, Fig. 2, whence the fines pass to a classifier 36 and receivers 38, 41, and coarse particles are carried by conveyer 27<SP>1</SP> to; (a) an air classifier 32 whence the fines pass to a receiver 34 and coarse particles to a spout 33, and; (b) a spout 29 leading into the spout 33 whence it returns to the mill, the general arrangement being such that the recirculating load in the classifying system is at least three times the weight of the finished product collected. The classifying system is kept at a temperature of for example 180-212‹F. when the mill is at 275‹F., and at a humidity of 85 per cent or more. Specification 657,665 is referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB201148A GB657621A (en) | 1948-01-22 | 1948-01-22 | Process for grinding and classifying organic materials |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB201148A GB657621A (en) | 1948-01-22 | 1948-01-22 | Process for grinding and classifying organic materials |
Publications (1)
Publication Number | Publication Date |
---|---|
GB657621A true GB657621A (en) | 1951-09-26 |
Family
ID=9732020
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB201148A Expired GB657621A (en) | 1948-01-22 | 1948-01-22 | Process for grinding and classifying organic materials |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB657621A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1912940A1 (en) * | 1968-04-02 | 1970-02-26 | Defibrator Aktiebolaget | Process for making mechanical pulp |
FR2716390A1 (en) * | 1994-02-18 | 1995-08-25 | Ferrailles Cie Fse | Method of preventing explosions in grinder |
EP0739653A1 (en) * | 1995-04-26 | 1996-10-30 | Compagnie Francaise Des Ferrailles | Improvement for eliminating the explosion risk in crushing installations |
-
1948
- 1948-01-22 GB GB201148A patent/GB657621A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1912940A1 (en) * | 1968-04-02 | 1970-02-26 | Defibrator Aktiebolaget | Process for making mechanical pulp |
FR2716390A1 (en) * | 1994-02-18 | 1995-08-25 | Ferrailles Cie Fse | Method of preventing explosions in grinder |
EP0739653A1 (en) * | 1995-04-26 | 1996-10-30 | Compagnie Francaise Des Ferrailles | Improvement for eliminating the explosion risk in crushing installations |
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