1. Magnetic iron ore dressing is mainly used for selection of low grade iron ore. As the magnetic ore is easy to elect, the national factory uses stage milling process, t milling granule is used in the coarse magnetite, tiny particles uses the magnetite of paragraph 2 or 3 mill. The development of our own serialized magnets makes magnetic engine achieve a permanent magnet. A fter1970's, the National magnetic iron ore dressing plant promoted new technologies, which increased high grade by 62% to about 66% ,meeting the demand of 65% the Ministry of Metallurgical Industry asked.
2. weak magnetic iron ore dressing is mainly used to select iron ore, hematite, brown iron ore, Mitsubishi, false hematite or mixed iron ore mine, which is called the 'red mine.' Such low grade ore are all the small size,complexed mineral composition ,which makes it difficult to select. After 1980's, ore dressing techniques for roasting magnetic separation, wet strong magnetic separation magnetic flotation, weak and the election process, equipment and new varieties of pharmaceutical research get continuous improvements ,which all increased metal ore in quality and the rate of return. Angang Qida hill ore dressing plant uses new magnetic-magnetism flotation process, which gets encouraging achievements.
3. Polymetallic ore dressing is complicated and diverse types, the use of equipment, methods and procedures are different, such as Baiyun Ebo Iron Ore of Hubei uses floating recourse , gradient flocculating flotation, weak magnetic-counter flotation-strong magnetic separation, weak magnetic flotation, burning magnetic separation process, to improve iron recovery, and comprehensively recycle rare earth oxides. Panzhihua iron ore uses magnetic separation to get around 53% of TFE vanadium iron ore, after the election, the tailings is swept by the weak magnetic elections-magnetism elections-elections-flotation-dry electricity, and sulphur cobalt, finally recycled titanium and cobalt. Daye Iron Ore uses magnetic weak-strong magnetic and flotation to comprehensively recycled iron, copper and cobalt, sulphur dioxide and other elements.
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