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当前,重选和湿式磁选是选别含钛铁矿砂矿的主要方法。按菱铁矿和钛铁矿的比重(4.72及3.9克/立方厘米)及磁化系数而言相差不大。因此,当用螺旋选矿机选别时两种矿物均进入重选精矿,而当湿式磁选时则成为磁性产品。众所周知,当菱铁矿加热到350～450℃时分解出二氧化碳气体同时所形成的氧化铁比菱铁矿的磁化系数大大增高。从处理铁矿石的实践中知道,为了提高弱磁性矿物如赤铁矿、褐铁矿、菱铁矿及黄铁矿的磁性采用磁化焙烧。为了最终精选钛铁矿粗精矿,即为了分离钛铁矿
At present, re-election and wet magnetic separation is the main method of sorting the ilmenite ore. By the proportion of siderite and ilmenite (4.72 and 3.9 g / cm3) and the magnetization coefficient in terms of little difference. As a result, both minerals enter the re-concentrates when sorting with a spiral concentrator and become magnetic when wet magnetic separation. It is well known that when the siderite is heated to 350-450 ° C, carbon dioxide gas is decomposed and the iron oxide formed at the same time greatly increases the magnetization coefficient of siderite. It is known from the practice of treating iron ore that magnetization roasting is used to increase the magnetism of weakly magnetic minerals such as hematite, limonite, siderite and pyrite. For the final selection of ilmenite crude concentrate, that is to separate the ilmenite