Benefication Study on Esteghlal Clays
National Iranian Steel Corporation (NISCO), No. 685, Valy-e-Asr, Tehran, IRAN
Results of the first stage of the study on beneficiation of the pyrophyllitic clays from Esteghlal deposit are presented in this report. The study was performed by me in accordance with agreement between the NATIONAL IRANIAN STEEL COMPANY (NISCO) Samples of clay from Esteghlal deposit in number of three have been delivered by NISCO in a bulk form to karaj. Based on results of basic laboratory tests and analyses, and study of available previous reports the program of beneficiation tests on laboratory scale was proposed by me The study resulted in recommendation of the basic wet treatment process, in which the desaggregation in water medium and subsequent gravity separation (using shaking table equipment) are incorporated. This process is giving substantial decrease of Fe203 content and treated product is comparable with ceramic clays available on European raw material market- As additional steps, which can be included in flowsheet of beneficiation, the hydrocyclone separation on one hand and the high intensive electromagnetic separation (HIMS) on the other one have been tested on laboratory scale. According to requirements of the raw material market, the pyrophyllitic ceramic clay product and illite – kaolinitic clay product can be separated if hydrocyclone equipment will be added to the basic benificiation line. Both products differe in the plasticlty value.
With respect to these very promising results futher continuation of the beneficiation study (Stage II) is recommended. The beneficiation process recommended in this report should be aimed to following final goals:
– optimalisation of operational steps and recommendation of adequate equipments-
– feasibility study including general layout of beneficiation plant-