Writers : Gharibnavaz,Atiyeh;Ebrahimi,Khosrow;Mazaheri,Seyd Ahmad;Yousofi,Abbas
Refference : 11th Symposium Of Geological Society Of Iran - Mashhad, Ferdowsi University
Publishing Year : 1386

Abstract :

“Ahooee” and “Rokh-sefid” resources are occurred due to the infiltration of the dikes and alteration of pyroclastic rocks of the area. The samples of Gonabad’s kaolinite have the low humidity between 0.1 % to 1.39 %, which are suitable for the tile industry. These samples can be used in paper industry because of their high brightness degree. The samples which have high percentage of Fe’s and Ti’s impurities can reach the desirable brightness after the multi-level production process. The samples with less than 0.5 % Fe-oxides show a good fired color, and can be used in ceramic industry. But the water absorption percentage of these samples range from 13.75 % to 33.63 %, which show higher amounts in comparison with American kaolinite, and consequently, in order to use them in ceramic industry, their amount of porosity should be decreased. The EMA1 and EMB5 samples, with much higher percentage of raw MOR in proportion to the American samples, have a higher position in ceramic industry. These samples show much higher fired MOR, because the particles weld together. Overall, with the increase in the amount of silica in the samples of Gonabad’s kaoloinite, the plasticity decreases, and the samples show lower MOR.

Subject List : Kaolin