In the present study, the mineral processing possibility of Sorkh-cheshmeh ore in the north of Khorasan province, Iran was investigated. These studies were carried out based on the dissolution and settling velocity of red mud. The results show that the using of this deposit separately is not applicable, because of low dissolution and/or low settling velocity of red mud. The other parameters such as dissolution temperature, the amount of lime and Na2Oc must be carefully controlled to have the bet
