A system and method for comprehensive utilization of high-speed iron bauxite suspension roasting
A high-speed iron bauxite and suspension roasting technology, which is applied in the field of mineral processing, can solve the problems that high-speed iron bauxite resources cannot be efficiently and comprehensively utilized, low processing capacity, and high energy consumption, and achieves waste heat recovery, large processing capacity, and high transmission efficiency. High heat and mass transfer efficiency
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Embodiment 1
[0039] The structure of the comprehensive utilization system of high-iron bauxite suspension roasting is as follows: figure 1 Shown, comprise feeding bin (1), cyclone separator (11), suspension roasting accumulator (3), burner (4), suspension roasting oxidizer (5), reducer (6), cooler ( 7) and magnetic separator (8); the discharge port of feeding bin (1) is communicated with the inlet of screw feeder (2), and the outlet of screw feeder (2) passes through pipeline and cyclone separator (11) The feed inlet at the top is communicated, the discharge outlet at the bottom of the cyclone separator (11) is communicated with the feed inlet below the suspension roasting accumulator (3), and the discharge outlet above the suspension roasting accumulator (3) is connected to the The feed port above the suspension roasting oxidizer (5) is connected, the discharge port at the bottom of the suspension roasting oxidizer (5) is connected with the feed port of the reducer (6), and the discharge ...
Embodiment 2
[0060] System structure is the same as embodiment 1;
[0061] Method is with embodiment 1, and difference is:
[0062] (1) crushing the high-iron bauxite to a particle size of -200 mesh accounts for 65% of the total weight;
[0063] (2) The material temperature in the suspension roasting accumulator is 1000°C;
[0064] (3) The solid material temperature in the suspension roasting oxidizer is 800°C, and the residence time is 20min;
[0065] (4) The residence time of solid materials in the discharge chamber is 15min, the temperature is 600°C, the ratio of furnace gas to solid materials is according to CO and H 2 The total amount and Fe 2 o 3 The molar ratio is 1:2;
[0066] (5) enter the cooler to cool to 220 ° C, and then magnetically separate under the condition of a magnetic field strength of 1300Oe;
[0067] (6) the iron grade TFe of the high-iron bauxite that adopts is 33%, and in weight percent Al 2 o 3 29%, SiO 2 6%, TiO 2 4%; iron grade of iron concentrate po...
Embodiment 3
[0069] System structure is the same as embodiment 1;
[0070] Method is with embodiment 1, and difference is:
[0071] (1) crushing the high-iron bauxite to a particle size of -200 mesh accounts for 70% of the total weight;
[0072] (2) The material temperature in the suspension roasting accumulator is 1100°C;
[0073] (3) The solid material temperature in the suspension roasting oxidizer is 900°C, and the residence time is 10min;
[0074] (4) The residence time of solid materials in the discharge chamber is 8min, the temperature is 700°C, the ratio of furnace gas to solid materials is according to CO and H 2 The total amount and Fe 2 o 3 The molar ratio is 1.3;
[0075] (5) enter the cooler to cool to 240 ° C, and then magnetically separate under the condition that the magnetic field strength is 2200Oe;
[0076] (6) the iron grade TFe of the high-iron bauxite that adopts is 27%, and in weight percent Al 2 o 3 34%, SiO 2 8%, TiO 2 5%; iron grade of iron concentrate...
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