**5. Results**

*Mineralogy - Significance and Applications*

Bayhan conducted investigations around the study area and stated that the mineralogical composition of the alkaline igneous rocks in the region was formed by orthoclase, plagioclase, leucite, nozean, nepheline, cancrinite, aegirinaugite, amphibole, and biotite minerals [22]. We concluded that converting of leucite, nepheline, and orthoclase minerals form euhedral pseudoleucite crystals in these

Within the scope of this study, approximately 40 kg of sample was provided to represent the study area. Pseudoleucite syenite samples brought to the laboratory were reduced to less than −1 mm size using jaw and hammer crushers. The appearance of the obtained samples after size reduction operations is given in **Figure 10**. After crushing operations, sample reduction operations were carried out. Then, magnetic enrichment experiments were performed. The appearance of the product

Magnetic separation experiments were carried out by Aksa Magnet magnetic separator with 9000 Gauss. The enrichment process was carried out under dry conditions. Magnetic separation was carried out once in the magnetic separator with 5000 gr sample. Then, 2470 gr pseudoleucite concentration was obtained. Chemical analysis of these samples was performed by the Oxford Instruments X-Supreme brand XRF device before and after magnetic separation processes. The results of the

**60**

intrusions.

**Figure 9.**

*4.2.2.1 Sample preparation*

*4.2.2.2 Magnetic enrichment*

analysis are given in **Table 1**.

*4.2.2 Ore preparation and enrichment processes*

*TAS diagram of analyzed sample in magmatic rock classification [23].*

obtained after magnetic enrichment is given in **Figure 11**.

In this study, the usability of pseudoleucites in alkali syenites from İsahocali region (Kırşehir) in Central Anatolia as a raw material in glass and ceramics sectors has been investigated. Within the scope of the study, approximately 40 kg of sample was provided to represent the studied intrusions. Pseudoleucite syenite samples were reduced to less than −1 mm size using jaw and hammer crushers. After crushing and grinding processes, magnetic enrichment experiments were performed. For this purpose, the samples were subjected to magnetic separation process in the dry magnetic separator. Na2O + K2O (15.71 wt.%) and Fe2O3 (3.11 wt.%) contents were determined in pseudoleucite syenites prior to the magnetic enrichment

process. In terms of the analytical result performed after enrichment processes, their Na2O + K2O contents increased (17.76 wt.%) and Fe2O3 content (0.43 wt.%) decreased. It was observed that the iron-containing minerals could be removed after the separation process.

We claimed that high concentrations of iron minerals in İsahocalı (Kırşehir) pseudoleucite syenites can easily remove via magnetic enrichment processes under optimum enrichment conditions. It is suggested that the concentrated Na2O + K2Orich product obtained after magnetic enrichment can be added to the economy as a high quality product and can be used in different sectors of industry with the necessary tests and investigations. The nepheline syenites produced in the Kırşehir region are used in cement and ceramic industry [23, 24]. More detailed tests on the availability of pseudoleucite syenites in the glass and ceramics industry are recommended.
