Preparation system and method of vanadium slag pellets

Abstract

The invention discloses a preparation system and method for vanadium slag pellets, relates to the field of metallurgy technology, and solves the technical problem of providing a set of devices and methods that can improve the pelletizing rate. The technical scheme adopted in the present invention is: a vanadium slag pellet preparation system, including a binder preparation device, a material mixing device, a ball pressing device, a material distribution device and a drying device, and the binder preparation device is connected with the material mixing device and sent to the mixing device. The feeding device provides binder, the feeding port of the mixing device is connected to the ball pressing device, the ball material outlet of the ball pressing device is connected with the distributing device, and the discharge end of the distributing device is provided with a drying device. The preparation method of vanadium slag pellets is that humic acid, caustic soda and water pass through a binder preparation device to prepare a binder, and then vanadium slag, soda ash and binder are made into a mixture through a mixing device, and then passed through a pressing The vanadium slag balls are prepared by the ball device, and then the vanadium slag balls are distributed by the distributing device, and finally the vanadium slag balls are dried by the drying device to obtain qualified vanadium slag pellets.

Description

Vanadium slag pellet preparation system and preparation method technical field The present invention relates to metallurgical technology field, be specifically related to vanadium slag pellet preparation technology. Background technique [0002] Since December 2015, Panzhihua Iron and Steel Group started the project of "Research on Vanadium Slag Sodiumized Pellet Roasting Industrialization Technology for Vanadium Extraction", Five larger production trials have been performed to obtain critical parameters, but the stock preparation for each production trial has This is the longest and most labor-intensive part of the experiment. Before March, 2019, the preparation technology of vanadium slag pellets adopted by Panzhihua Iron and Steel Group was: vanadium slag (-120 mesh ≥ 80%, MFe≤ 5%): soda ash = 1000:280 (mass), the material obtained after thorough mixing is conveyed to the disc granulator through a screw square; after the caustic soda solution is adjusted to a NaOH...

AI Technical Summary

Problems solved by technology

Third, the probability of vanadium slag on the disk to contact with water is different, and the vanadium slag with high water content forms balls quickly and has large particles

After exploration, the mass moisture content of the vanadium slag granulated pellets is 12% to 15%. The ball forming rate is low, and the ball forming rate in production is only about 60%

[0008] The vanadium slag pellets are conveyed to the distributor at the feed end of the dryer through the inclined belt. During the process of dispersing the vanadium slag pellets on the mesh belt of the dryer, the vanadium slag pellets are in hard contact with them. In addition, the strength of the pellets is poor, and the vanadium slag pellets are seriously broken, which leads to a further reduction in the pelletizing rate of the vanadium slag pellets

The mass moisture content of the slag pellets is 12% to 15%. After entering the dryer, the slag pellets cannot achieve rapid temperature rise to remove the moisture of the pellets. The reason is that the temperature of the slag pellets is higher than 100°C Finally, the moisture in the pellets will quickly vaporize and transfer to the surface of the pellets, and the water vapor cannot be taken away immediately, causing moisture to gather on the surface of the pellets and cause the pellets to soften and collapse, seriously affecting the pellet formation of the pellets Rate

Therefore, the existing drying method is directly carried out in an atmosphere higher than 100°C, and this drying method is also an important factor in reducing the pelletizing rate of slag pellets

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