A granulator with cooling function and its driving system

Abstract

The invention discloses a granulator with a cooling function and a drive system of the granulator. The granulator comprises a granulator body, a granulator fixing device and a granulator drive device.The granulator body is in a disc shape or cup shape, the edge dip angle ranges from 30 degrees to 60 degrees, a flow guide cone is arranged in the center, and the granulator body is fixed to the granulator fixing device. An air flow channel is arranged in the granulator fixing device, and an expanding heated face is arranged at the bottom, in contact with the granulator body, of the granulator fixing device. Multiple air openings are formed in the top of the granulator fixing device. The granulator drive device is used for driving the granulator body to rotate. Air cooling or water cooling oroil cooling is adopted for cooling a rotary shaft. According to the granulator, the working temperature of a motor, the rotary shaft and the granulator fixing device can be reduced, it can be guaranteed that the motor, the rotary shaft and the granulator fixing device normally operate for a long time, and therefore it is guaranteed that the granulator is driven safely and stably, the granulationeffect is achieved better, and the granulation efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of waste heat recovery of high-temperature liquid slag, in particular to a granulator with a cooling function and a driving system thereof. [0002] technical background [0003] At present, China is the world's largest steel producer, and its steel output ranks first in the world. In 2015, China's pig iron production reached 691 million tons, accounting for about 60% of the world's total production. In October 2016, China's pig iron production was 586 million tons, accounting for about 60% of the world's total production. In the process of smelting pig iron, blast furnace slag containing huge heat will be produced. The temperature of blast furnace slag is generally between 1400 ~ 1550 °C, and each ton of slag contains (1260 ~ 1880) × 10 3 The sensible heat of kJ is equivalent to 60kg standard coal. Under the existing ironmaking technology in my country, 0.3 tons of blast furnace slag is produced as a by-p...

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Problems solved by technology

However, since the temperature of the liquid blast furnace slag is above 1350°C, the heat of the blast furnace slag is transferred from the granulator to the tray and then to the rotating shaft. It affects the granulation effect of the driven granulator. At the same time, the continuous operation of the motor will also cause the temperature to rise, which will easily cause motor failure and shorten the life. In addition, due to structural reasons, the shaft will shake back and forth when rotating. Affects the granulation effect of the granulator

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