Dynamic pellet roaster and using method thereof

Abstract

The invention discloses a dynamic pellet roaster which comprises a roaster body, an air feeding air pump, a transmission lead screw, a computer real-time monitoring and controlling system and a material cage. The transmission lead screw driven by a motor is connected with the material cage filled with pellets through an upper support and a supporting rod, and the transmission lead screw can move up and down and enter a hearth in the roaster body. Heating elements are located on the lower portion of the roaster body, located on the periphery of the hearth and evenly distributed, and the heightof the heating elements is not larger than 2 / 3 of the dimension of the whole hearth. Porous heat storage bricks or high-aluminum balls with the diameter being 4-20 mm are arranged at the bottom insidethe hearth, and the upper edges of the porous heat storage bricks or the high-aluminum balls are not higher than the 1 / 2 positions of the heating elements. The material cage is in a downward conicalshape, a hole with the diameter being 10-12 mm is formed in the middle of the bottom of the material cage, and small holes with the diameter being smaller than 10 mm are evenly distributed in the sidewall of the material cage. Cold air blown from the air feeding air pump passes through a flowmeter and then enters the hearth from the bottom, the upper edge of the interior of the material cage andthe upper edge of the hearth are provided with a thermocouple and a smoke composition collecting system correspondingly, a collected temperature signal and a collected smoke composition signal are transmitted to the computer real-time monitoring and controlling system, and meanwhile, the computer real-time monitoring and controlling system can control the motor and the flowmeter according to the signals.

Description

Technical field [0001] The invention belongs to the technical field of pellets, and particularly relates to a pellet dynamic roaster and a method of use thereof. Background technique [0002] The use of electric furnaces to simulate pellet roasting in the laboratory has always been a problem for metallurgists. The main difficulties are that the first is that the amount of pellets is small, the roasting time is long, and the roasting is uneven. The second is that static non-blast roasting cannot Simulate the actual situation on site. The former is because the pellet heating is radiative conduction heat transfer, the roasting speed is slow, and the amount of charge can not be large at one time, otherwise the experiment time will be too long, and the pellets on the surface of the crucible and the inside of the pellet will be roasted and oxidized differently, resulting in a great quality. In addition, the volume of the pellets expands during the roasting process. If the amount is to...

AI Technical Summary

Problems solved by technology

[0002] It has always been a difficult problem for metallurgists to use electric furnace to simulate pellet roasting in the laboratory. The main difficulties are that, first, the amount of pellet roasting is small, the roasting time is long, and the roasting is uneven; the second is that static non-blast roasting cannot Simulate the actual situation on site

The former is because the heating of the pellets belongs to radiation conduction heat transfer, the roasting speed is slow, and the amount of charging materials should not be too much at one time, otherwise the experiment time will be too long, and the pellets on the surface of the crucible and inside the roasting and oxidation atmosphere are different, resulting in a large quality difference. In addition, the volume of the pellets expands during the roasting process. If the loading is too much, they will be squeezed and the discharge will be difficult.

The surface of the existing experimental furnace manufacturing and use, in the heating process of the electric furnace, if the wind speed is too fast and the air volume is too large, the furnace temperature will drop too fast, which cannot meet the temperature requirements for pellet roasting

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