GB1094621A - Granulation and size-classification of solid materials - Google Patents

Granulation and size-classification of solid materials

Info

Publication number
GB1094621A
GB1094621A GB1142964A GB1142964A GB1094621A GB 1094621 A GB1094621 A GB 1094621A GB 1142964 A GB1142964 A GB 1142964A GB 1142964 A GB1142964 A GB 1142964A GB 1094621 A GB1094621 A GB 1094621A
Authority
GB
United Kingdom
Prior art keywords
granulation
size
hoppers
granule
granules
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
Application number
GB1142964A
Inventor
Martin S Bloom
Walter John Levene
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB1142964A priority Critical patent/GB1094621A/en
Publication of GB1094621A publication Critical patent/GB1094621A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
    • G01N15/02—Investigating particle size or size distribution
    • G01N15/0255—Investigating particle size or size distribution with mechanical, e.g. inertial, classification, and investigation of sorted collections
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D5/00—Control of dimensions of material
    • G05D5/04—Control of dimensions of material of the size of items, e.g. of particles
    • G05D5/06—Control of dimensions of material of the size of items, e.g. of particles characterised by the use of electric means

Abstract

1,094,621. Automatic size control. IMPERIAL CHEMICAL INDUSTRIES Ltd. March 5, 1965 [March 18, 1964], No. 11429/64. Heading G3R. [Also in Division G1] In a granulation process in which granulated material is classified into different size fractions, the quantity of material in a measuring device containing one size fraction is compared with a reference quantity and any change in the relationship between the two quantities is automatically corrected by control of the granulation conditions. As applied to the granulation of calcium sulphate, calcium sulphate hemi-hydrate and a spray of water are supplied to an inclined granulation dish rotated by an electric motor, and the resulting granules allowed to fall through a transverse air stream so that they are deflected to an extent dependent on their size into five hoppers which thus receive granules in different size categories. The granules in two of the hoppers are each passed through an inspection chamber one granule deep to intercept X-rays influencing ionization chambers so as to measure granule-mass. If the difference between the two measurements exceeds a predetermined value it is effective through a reversible servomotor to adjust the angle of tilt of the granulation dish in the appropriate sense so that granulation time and hence growth is varied to equalize masses in the two hoppers. A thin plastic tape moves between the inspection chamber and the X-ray source and between the inspection chamber and the ionization chamber to remove dust and moisture and prevent fouling. The ionization chambers have aluminium windows and are filled with krypton. The Specification also refers to:- (a) separation by hot gases which also effect drying. (b) intermittent sampling of granule mass. (c) controlling rate of feed to or rate of rotation of the granulator and/or the position of the liquid spray. (d) control in dependence on a comparison between one size category and a reference instead of between two size categories. (e) application to blunger, drum or compaction granulation or prilling from a solution, melt or slurry. (f) application to fertilisers, cement, carbon black, metal or plastic.
GB1142964A 1964-03-18 1964-03-18 Granulation and size-classification of solid materials Expired GB1094621A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1142964A GB1094621A (en) 1964-03-18 1964-03-18 Granulation and size-classification of solid materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1142964A GB1094621A (en) 1964-03-18 1964-03-18 Granulation and size-classification of solid materials

Publications (1)

Publication Number Publication Date
GB1094621A true GB1094621A (en) 1967-12-13

Family

ID=9986085

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1142964A Expired GB1094621A (en) 1964-03-18 1964-03-18 Granulation and size-classification of solid materials

Country Status (1)

Country Link
GB (1) GB1094621A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4429410A (en) 1980-02-15 1984-01-31 Coal Industry (Patents) Limited Apparatus and method for assessing the concentration of mineral matter in coal-derived liquids

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4429410A (en) 1980-02-15 1984-01-31 Coal Industry (Patents) Limited Apparatus and method for assessing the concentration of mineral matter in coal-derived liquids

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