Process and device for preparing iron ore concentrate through mixture of aluminum oxide red mud tailings and copper tailings

Abstract

The invention relates to a process for preparing an iron ore concentrate, in particular to a process and a device for preparing the iron ore concentrate through a mixture of aluminum oxide red mud tailings and copper tailings. The process comprises the steps of filter-pressing the red mud tailings, mixing with a curing agent and a drying agent, processing until the water content of the red mud tailings is smaller than 20 percent, stirring and mixing with the copper tailings, stacking and turning over; diluting the obtained materials, then screening out impurities, and after classifying other materials through a cyclone, settling overflow matters in a settling tank; and adding a chemical flocculant into the settling tank, feeding underflow solids settled in the settling tank to a magnetic separator, carrying out magnetic separation, filtering and dewatering a solid part obtained through magnetic separation, and obtaining an irony additive or medium powder. According to the process and the device for preparing the iron ore concentrate through the mixture of the aluminum oxide red mud tailings and the copper tailings provided by the invention, the discharging quantity of red mud and the stacking quantity of the copper tailings can be greatly reduced, the wastes are truly recycled, the effective utilization rate of iron elements can reach to more than 70 percent, and medium powderand iron ore concentrate powder products with high yield and high grade are obtained.

Description

technical field [0001] The invention relates to a process for preparing iron concentrate, in particular to a process and a device for preparing iron concentrate from alumina red mud tailings and copper tailings mixture. Background technique [0002] Current status of red mud at home and abroad: Some domestic enterprises have successively carried out sintering red mud to produce cement, red mud to make unburned bricks, sintered bricks and other new wall materials, red mud to make silicon-calcium board insulation materials, red mud plastic fillers, red mud Some progress has been made in technical research on the use of roadbed materials and the extraction of valuable metals such as scandium, titanium, and iron from red mud, but the large-scale application of red mud has not been realized. The Bayer Red Mud, which is the most researched abroad, is firstly considered as a raw material for ironmaking because of its high iron oxide content. The German company Gebel Killini has con...

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Problems solved by technology

The problems that these methods exist are that recovery rate is low, technological process is complicated, and production cost is higher etc.

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