Titanium slag fine powder recycling device and method

Abstract

The invention belongs to the technical field of chemical production, and particularly relates to a titanium slag fine powder recycling device and method.The titanium slag fine powder recycling device comprises a stock bin, a weightlessness scale, an extruder, a cooling tank and a traction crusher which are sequentially connected; the material bin is used for adding asphalt particles and byproduct fine powder, the weightlessness scale is used for adjusting the proportion of the asphalt particles and the byproduct fine powder and the feeding rate, the extruder is used for dispersing the byproduct fine powder into molten asphalt to form a strip-shaped melt, and the cooling tank is used for cooling the high-temperature strip-shaped melt. The traction crusher is used for pelletizing and drying the cooled strip-shaped melt to produce fine powder master batches required by the boiling chlorination furnace; the invention aims to increase the granularity of fine powder, prolong the retention time of the fine powder in a boiling bed layer, participate in chlorination reaction and improve the utilization rate of titanium resources.

Description

technical field [0001] The invention belongs to the technical field of chemical production, and in particular relates to a device and a method for recycling titanium slag fine powder. Background technique [0002] At present, in the production process of boiling chlorination, a large amount of titanium slag and petroleum coke fine powder will inevitably be collected during the raw material transportation process. The current practice is to put these fine powders into the boiling chlorination furnace, and a small part will participate in the reaction and be recovered, but most of them will be blown out of the furnace by the airflow and cannot participate in the reaction, resulting in waste of materials; In titanium chloride, increasing the solid content of crude titanium tetrachloride will increase the risk of blockage of the heat exchanger, and will also increase the amount of high boilers during the refining process and reduce the heat exchange efficiency of the still. In ...

AI Technical Summary

Problems solved by technology

[0002] At present, in the production process of boiling chlorination, a large amount of titanium slag and petroleum coke fine powder will inevitably be collected during the raw material transportation process, and in addition, in the process of titanium slag crushing, titanium slag fine powder will inevitably be produced, The current practice is to put these fine powders into the boiling chlorination furnace, a small part will participate in the reaction and be recovered, but most of them will be blown out of the furnace by the air flow, and cannot participate in the reaction, resulting in waste of materials; In titanium chloride, increasing the solid content of crude titanium tetrachloride will increase the risk of blockage of the heat exchanger, and at the same time increase the amount of high boiling point substances during the refining process and reduce the heat exchange efficiency of the still

In addition, the titanium slag and fine coke powder recovered from the dust collection slag of the fluidized chlorination furnace cannot be used in the furnace because the particle size is too fine

However, the grade of these fine powders is relatively high, meeting the grade requirements of fluidized chlorination furnaces. At present, they are usually sold as acid slag, and the price difference with titanium chloride slag is large, causing great economic losses.

It is also possible to make fine powder into pellets and return to the furnace for re-smelting, but the energy consumption is large; there is also a binder to granulate the fine powder and then crush it into the required particle size, but the general granulation strength is insufficient, and the fine powder after crushing There are still more powders, and the recovery rate of fine powders is low

Images