twp types of gypsum available from us:

One is a natural one,called anhydrite,applicable in cement industry,soil improvement,feeder additives etc.It is mainly composed of calcium sulphate without combined water.

There are two grades of them,typically they contain about 92% and 84% of calcium sulphate respectively.

The other one is man-made gypsum and it is made from the slag of the fertilizer of ammonium phosphate by de-phosphorization and alkalification of the slag,(that is, changing the acid slag to alkali one) and pelletization.These man-made gypsum balls, maily containing calcium sulphate-bi-hydrate(CaSO4-2H2O) are widely used in Chinese cement industry as a substitute of natural gypsum and fluorspar and their main specifications are as follows:

1. Main content:CaSO4-2H2O

2. SO3: 39-43%

3. P, F: trace

4. Crystalized water: 16-20%

5. Insolubles: 5%max.

6. PH value: 7min.

7. Free water: 14-18%

8. Size: 10-20mm

Interested aprties are invited to contact us by email:yansu@njmco.com or fax:86-25-52346729

Thanks and regards,

Yan Su for nanjing Minmetals

Attachments

gyp-balls (JPG)

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