Smelting slag double-layer centrifugal granulation device with air quenching function

Abstract

The invention discloses a smelting slag double-layer centrifugal granulation device with an air quenching function. The smelting slag double-layer centrifugal granulation device comprises an upper-layer rotating cup, a lower-layer rotating cup, an air guide base plate, an air pipe sleeve, a rotating shaft, a motor and a fixed support; the edges of the upper-layer rotating cup and the lower-layer rotating cup are provided with slope type bosses; dense sawteeth are uniformly distributed on the slope type bosses; the upper-layer rotating cup and the lower-layer rotating cup are both fixed to theupper end of the rotating shaft; a plurality of through drainage holes are formed in the upper-layer rotating cup; the air guide base plate is fixedly connected with the air pipe sleeve; the rotatingshaft is sleeved with the air pipe sleeve in a penetrating mode; the upper end of the rotating shaft is sleeved with a first bearing in a penetrating mode; a first bearing block is arranged outside the first bearing; the first bearing block is connected with the air pipe sleeve through a plurality of spokes; a ventilation opening is formed among the spokes; an air inlet is formed in the bottom ofthe air pipe sleeve; and an air supply channel is formed between the ventilation opening and the air inlet. The smelting slag treatment capacity can be improved, the contact surface of air flow and slag is increased, the heat exchange efficiency of the air flow and the slag is optimized, and the slag granulation quality is guaranteed.

Description

technical field [0001] The invention relates to the technical field of smelting slag granulation, in particular to a double-layer centrifugal granulation device for smelting slag with the function of wind quenching. Background technique [0002] With the increasing energy bottleneck problem in our country, the metallurgical industry, which is a large energy consumer, must achieve green and sustainable development, and develop, utilize and efficiently recover sensible heat resources of high-temperature slag, which will become one of the important energy-saving tasks of the metallurgical industry in the future. In order to reduce energy consumption and pollutant discharge as the goal, comprehensively implement energy-saving and emission-reduction upgrades, and increase the development and application of technologies such as efficient treatment of smelting slag and deep comprehensive utilization, waste heat recovery and resource utilization of smelting slag. [0003] The smelti...

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Problems solved by technology

However, if the particle size of the granulated slag is too large, the cooling rate of the molten slag particles will decrease during the heat exchange process with the heat transfer medium in the space, and the molten slag particles will easily transform into a crystal phase, resulting in a decrease in the glass transformation rate and affecting the particle size. Efficient resource utilization of slag particles; if the particle size of granulated slag particles is too small, its flying distance is relatively long, and it is easy to hit the wall of the granulation chamber in a molten state or a state of external condensation and internal melting to stick to it, and Easily sticks into large pieces

If the high-temperature slag particles are all bonded to the wall surface and bonded into large pieces, on the one hand, it is easy to cause overheating and corrosion on the wall surface of the granulation bin, and the large pieces bonded after cooling are not easy to clean, which brings great difficulties to the maintenance work. Large workload; on the other hand, the slag particles that are bonded into large pieces are slowly cooled in the granulation chamber space, and have sufficient time to crystallize, thereby reducing their glass conversion rate and affecting their efficient resource utilization

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