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GB991834A - Improvements in and relating to mixed fertilisers - Google Patents

Improvements in and relating to mixed fertilisers

Info

Publication number
GB991834A
GB991834A GB1537763A GB1537763A GB991834A GB 991834 A GB991834 A GB 991834A GB 1537763 A GB1537763 A GB 1537763A GB 1537763 A GB1537763 A GB 1537763A GB 991834 A GB991834 A GB 991834A
Authority
GB
United Kingdom
Prior art keywords
dryer
product
granulator
slurry
undersize
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
GB1537763A
Inventor
Peter John Sherrington
Peter Waterhouse
Daniel John Howard Jones
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 GB1537763A priority Critical patent/GB991834A/en
Priority to NL6404012A priority patent/NL6404012A/xx
Priority to US364330A priority patent/US3348938A/en
Priority to FR971363A priority patent/FR1389361A/en
Publication of GB991834A publication Critical patent/GB991834A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05B—PHOSPHATIC FERTILISERS
    • C05B19/00—Granulation or pelletisation of phosphatic fertilisers, other than slag
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • B01J2/10—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic in stationary drums or troughs, provided with kneading or mixing appliances
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • B01J2/12—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic in rotating drums

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Fertilizers (AREA)

Abstract

A granulated fertilizer comprises ammonium nitrate, potassium chloride or urea is provided with a coating of ammonium phosphate to reduce its caking tendency. A desired product having a particle size of 1.5-4 mm. is produced in a cyclic process by passing a melt, solution or slurry of a raw fertilizer material containing 0.5-25% of water and undersize and ground oversize product optionally together with solid raw fertilizer material into a granulator, passing the resulting granules into a rotary dryer with lifting flights in co-current with hot drying gas, coating the granules in the dryer by injecting a slurry of mono/di ammonium phosphate containing 8-25% of water into the dryer near its inlet, sieving to obtain the desired product, and recycling undersize and ground oversize product. The moisture content at the outlet of the granulator and dryer may be up to 4% and about 0.3% respectively. The ratio of recycled material to product may be 2-5 to 1. The granulator may be a rotary drum or paddle mixer. The slurry may be atomized into the dryer in a surrounding stream of air. The product may be coated with 2% of china clay.
GB1537763A 1963-04-18 1963-04-18 Improvements in and relating to mixed fertilisers Expired GB991834A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB1537763A GB991834A (en) 1963-04-18 1963-04-18 Improvements in and relating to mixed fertilisers
NL6404012A NL6404012A (en) 1963-04-18 1964-04-14
US364330A US3348938A (en) 1963-04-18 1964-04-15 Process for producing granular mixed fertilizer
FR971363A FR1389361A (en) 1963-04-18 1964-04-17 Mixed fertilizer improvements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1537763A GB991834A (en) 1963-04-18 1963-04-18 Improvements in and relating to mixed fertilisers

Publications (1)

Publication Number Publication Date
GB991834A true GB991834A (en) 1965-05-12

Family

ID=10058089

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1537763A Expired GB991834A (en) 1963-04-18 1963-04-18 Improvements in and relating to mixed fertilisers

Country Status (2)

Country Link
GB (1) GB991834A (en)
NL (1) NL6404012A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1542388B1 (en) * 1965-12-14 1971-05-13 Potasse & Engrais Chimiques Process for the granulation of substances present in the form of a melt, suspension or solution

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1542388B1 (en) * 1965-12-14 1971-05-13 Potasse & Engrais Chimiques Process for the granulation of substances present in the form of a melt, suspension or solution

Also Published As

Publication number Publication date
NL6404012A (en) 1964-10-19

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