Polyhalite granules
AssigneeAnglo American Woodsmith Limited
InventorsRafaella da Fonseca RODRIGUES, Timothy David LEWIS, Jonathan Richard Walton BROWN
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Abstract
The invention provides a granular material comprising a polyhalite composition; 0.2% (w/w) to 2.0% (w/w) organic binder and 0.5% (w/w) to 6.0% (w/w) inorganic binder, wherein the ratio of inorganic binder to organic binder is greater than 1:1 and a process for preparation of the material. The invention further provides a granule comprising polyhalite or polyhalite in combination with potassium salt/s having a crush strength of from 2.0 kgf to 6.0 kgf and a final moisture content of from 0.25 to 0.50% w/w.
Claims16
1-84. (canceled)
A granular material comprising:
- i. a polyhalite composition;
- ii. 0.2% (w/w) to 2.0% (w/w) organic binder;
- and
- iii. 0.5% (w/w) to 6.0% (w/w) inorganic binder;
- wherein
- the ratio of inorganic binder to organic binder is greater than 1:1.
A process for the preparation of polyhalite granules, the process comprising the steps of:
- (a) mixing
- (i) a polyhalite composition;
- (ii) from 0.2% (w/w) to 2.0% % (w/w) organic binder;
- (iii) from 0.5% (w/w) to 6.0% (w/w) inorganic binder, wherein the ratio of inorganic binder to organic binder is greater than 1:1;
- and
- (iv) from 0% (w/w) to 14% (w/w) water,
- to obtain a polyhalite mixture;
- and
- (b) granulating the polyhalite mixture to produce a polyhalite granules.
A granule comprising polyhalite or polyhalite in combination with potassium salt/s having a crush strength of from 2.0 kgf to 6.0 kgf and a final moisture content of from 0.25 to 0.50% w/w.
Dependencies are inferred from the claim text.