| 摘要 |
<p>Centrifuged or dry fertiliser, pref. K salt, from an eight-stage vacuum cooling plant is mixed with cement flue dust and humidified. The mixing takes place in the following ratio: 100 pts. wt. of dry fertiliser to 5 pts. wt. of cement flue dust and 15 pts. wt. of moisture. After loosening, the mixt. is rolled to pellets and dried. This facilitates the pelletising and produces fertilisers which is easy to scatter, without adding too much calcium to the soil.</p> |
