ISHS Acta Horticulturae 54: Symposium on Propagation in Arboriculture
"GRODAN" STONE WOOL AS MEDIUM FOR PROPAGATION AND CULTURE |
| Author: | E. Jørgensen |
| Abstract:
Grodan stone wool is a porous material with a pore volume of 97%. Grodan stone wool is made of various kinds of stones, mainly Diabas, which are melted at approx. 1.500°C. The stone liquid runs from the furnace down on rotating wheels which sling the beam away in drops pulling a fibre after it. A binder and additives, which make the wool absorbent, are added to the fibres, and they are then blown down into the wool chamber, where they are cooled, fall down and settle on the conveyer belt in the bottom as an unbroken layer. The stone wool is then passed on through the hardening furnace, where the binder is hardened into a shape of stable raw products such as propagation blocks, growing blocks, bats or granulates. | |
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