factories emissions are controlled by 2010/75 directives, this other constraint also entails to focuses on these values in Fines composition.
During 2 months, GISEMENT team has taken off samples of Fines in order to estimate their chlorine rate, before any sorting process. The average rate is up to the limit accepted by cementers. Sorting processes are needed to extract chlorine source, which the main one is PVC in NHIW and SBW. Mercury rate is always below the standard. Therefore, any sorting process is needed. For low heating power, results of analysis are currently practices in an independent laboratory. PVC density is up to water density. We suppose that it can be extracted thanks to density: hydraulic test for example. Thus PVC will be sorted in the same time than rubbles; this new mix would be separated during a second step of the whole processing line.
Empirical tests have been implemented which main objective is to define a technological solution to sort the rubble assimilated fraction and the organic one. Aeraulic tests realised with a blower in front of whom, fines were projected, showed that it is possible to separate easily heavy fraction and the light one. Into the light fraction, GISEMENT team found wood and polystyrene as the main components.
A hydraulic test was also implemented in the same objective. Fines were plunged in a full water tray. Separation between light element (wood and polystyrene) and heavy one was instantaneity. Each of these products of hydraulic separation represents 50% of the humid volume and light components embody nearly 25% of the humid mass. However, in spite of letting best results in term of separation, liquid sorting process is not the way the SME partner of GISEMENT, will choose at first. Indeed this kind of process is expensive since it implies water and energy consumption, and it needs to implement drying unit and water treatment plant. Because of environmental and economic costs the SME decided that this method i s a second option. Therefore, aeraulic process was chosen to extract organic fraction of fines. This part will be destined to complete SRF product at the end of the sorting chain. Analyses are led to evaluate the quantity of problematic substances which are persistent in organic and mineral fractions. 5