GB1057924A - Improvements in and relating to the treatment of freshly excavated superphosphate - Google Patents

Improvements in and relating to the treatment of freshly excavated superphosphate

Info

Publication number
GB1057924A
GB1057924A GB3186063A GB3186063A GB1057924A GB 1057924 A GB1057924 A GB 1057924A GB 3186063 A GB3186063 A GB 3186063A GB 3186063 A GB3186063 A GB 3186063A GB 1057924 A GB1057924 A GB 1057924A
Authority
GB
United Kingdom
Prior art keywords
superphosphate
helical members
acid
conditioner
speed
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
GB3186063A
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.)
ADELAIDE CHEMICAL AND FERTILIZ
Original Assignee
ADELAIDE CHEMICAL AND FERTILIZ
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 ADELAIDE CHEMICAL AND FERTILIZ filed Critical ADELAIDE CHEMICAL AND FERTILIZ
Publication of GB1057924A publication Critical patent/GB1057924A/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
    • C05B19/02—Granulation or pelletisation of phosphatic fertilisers, other than slag of superphosphates or mixtures containing them

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Glanulating (AREA)

Abstract

Freshly excavated superphosphate, obtained by the action of acid on crushed phosphate rock, is fed continuously to a conditioner wherein it is kneaded by rotating helical members driven at a tip speed in excess of a critical speed (as defined) and thus formed into granules of a size suitable for passing to a granulator for completing granulation. Water may be added as a spray during the kneading process, which may be controlled to reduce the free acid to less than 7% H3PO4 and to produce superphosphate of particle size not more than 1/2 -inch; when the acid and moisture content exceeds 18% fine particles of cured superphosphate may be added during conditioning. The critical speed is the tip speed of the helical members which allows the material to be just thrown off the tips of the helical members by centrifugal force. The conditioner (not shown) comprises a pair of helical members each consisting of a shaft and longitudinally spaced paddles rotatable in a trough of conveyer belting.
GB3186063A 1962-08-14 1963-08-13 Improvements in and relating to the treatment of freshly excavated superphosphate Expired GB1057924A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NZ13278762 1962-08-14

Publications (1)

Publication Number Publication Date
GB1057924A true GB1057924A (en) 1967-02-08

Family

ID=19916461

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3186063A Expired GB1057924A (en) 1962-08-14 1963-08-13 Improvements in and relating to the treatment of freshly excavated superphosphate

Country Status (1)

Country Link
GB (1) GB1057924A (en)

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