System and method for producing pellet
A technology for pellets and green pellets, which is applied in the field of systems for producing pellets, can solve the problems of low single-machine production capacity, high production and maintenance costs, uneven heating, etc., so as to reduce equipment and production costs and shorten production processes. Process, the effect of reducing the amount of powder returned
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[0074] Example 1
[0075] Add 53.6% of a hematite TFe, mixed with bentonite and water to make pellets. The green pellets have a particle size of 8-16mm and a moisture content of 8.7%; the green pellets are stepped into the annular roasting device and the pellets are made The pellet passes through the drying zone, the preheating zone, the roasting zone and the soaking zone in sequence to be dried, preheated, roasted and soaked in order to obtain metallized pellets. The angle of the drying zone is 80° and the temperature is 250°C; The angle of the preheating zone is 105° and the temperature is 350-950°C; the angle of the baking zone is 135° and the temperature is 1350°C; the angle of the soaking zone is 40° and the temperature is 1100°C; the thickness of the cloth is 60mm. The metalized pellets are cooled to obtain pellets, wherein the average compressive strength of the pellets is 2695N / ball, and the FeO content is 0.21%.
Example Embodiment
[0076] Example 2
[0077] A certain magnetite TFe61.2%, mixed with bentonite and water to make pellets, the particle size of the green pellets is 8-16mm, and the moisture content is 9.3%; the green pellets are stepped into the annular roasting device and the pellets are made The pellets go through drying zone, preheating zone, roasting zone and soaking zone in order to be dried, preheated, roasted and soaked in order to obtain metallized pellets. The angle of the drying zone is 75° and the temperature is 200 ℃; the angle of the preheating zone is 135° and the temperature is 400-1000℃; the angle of the baking zone is 120° and the temperature is 1250°C; the angle of the soaking zone is 30° and the temperature is 1050°C; the thickness of the cloth is 100mm. The metalized pellets are cooled to obtain pellets, wherein the average compressive strength of the pellets is 3250N / ball, and the FeO content is 0.63%.
Example Embodiment
[0078] Example 3
[0079] A certain limonite TFe 45.6% is mixed with bentonite and water to make pellets to obtain a green pellet with a particle size of 8-16 mm and a moisture content of 12.3%; the green pellets are stepped into the annular roasting device and the pellets are made The pellets pass through the drying zone, preheating zone, roasting zone and soaking zone in sequence to dry, preheat, roast and soak in order to obtain metallized pellets, where the angle of the drying zone is 105° and the temperature is 300°C; The angle of the preheating zone is 120° and the temperature is 400-1000°C; the angle of the baking zone is 105° and the temperature is 1300°C; the angle of the soaking zone is 30° and the temperature is 1000°C; the thickness of the cloth is 150mm. The metalized pellets are cooled to obtain pellets, wherein the average compressive strength of the pellets is 2234N / ball, and the FeO content is 0.81%.
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