Lime production

Fornaci Calce Grigolin has been operating for over 55 years in the production of high quality lime with the aim of guaranteeing its customers a wide and complete range of products for the use of lime in various sectors with different purposes.
The in-house chemical laboratory is always at the customer's disposal for any requirement, and all the CE certifications are available according to the UNI EN 459 regulations in force.
The peculiarities which distinguish the lime production of Fornaci Calce Grigolin are first of all the modern plants with high productivity and the continuous production cycle which, thanks to the use of wood sawdust as fuel, is considered zero impact as regards the Kyoto protocol.
Another strategic factor guaranteeing continuity of supply is the high availability of own deposits of limestone raw material of high quality and homogeneity.
The offer is completed by the storage capacity of the finished product and an efficient transport service with its own vehicles.

The raw material to obtain lime is limestone: a sedimentary rock rich in calcium carbonate that is extracted from special quarries.
The limestone, coarsely crushed with a diameter of a few centimetres, is introduced into special furnaces where it is fired at high temperatures between 800 and 900°C. 
During this phase, a reaction called "calcination" takes place, which leads to the formation of calcium oxide with the release of carbon dioxide.
The product thus obtained, also known as quicklime, takes the form of lumps of various grain sizes, which are then subjected to grinding and sifting. 
Hydrated lime (or slaked lime) is obtained through the process of hydration of quicklime.
The extinguishing of calcium oxide can take place by stoichiometrically dosing the water, with the formation of powdered hydrated lime, which in turn can be refined with specific wind separators to obtain micro-lime (or lime flower).
When quenching takes place with excess water, Lime Putty is obtained, which undergoes suitable seasoning in special tanks.