Titanium extraction tailings washing device and process

Abstract

The invention relates to the field of titanium extraction tail slag processing, and discloses a titanium extraction tail slag washing device and technology. The washing device comprises a cylinder, the top end of the cylinder is a feed inlet, the bottom end of the cylinder is a conical structure, the lower end of the conical structure is provided with a slag discharging opening, the slag discharging opening is provided with a slag discharging valve, the upper part of the cylinder is provided with an overflow opening, and the middle part of the cylinder is provided with a water inlet. A fluidizing technology is used in the device, and thus the soluble materials such as chlorine ions can be quickly and high efficiently removed from the titanium extraction tail slag. In the washing process, large particles of titanium extraction tail slag are discharged from the slag discharging opening arranged in the lower part of the cylinder and can be recovered and utilized after dehydration; while the small particles of titanium extraction tail slag are collected from the overflow opening, thus the grading on different particle sizes can be automatically achieved during the washing process, and moreover the particle size control can be achieved by adjusting the water flow speed. The device has a high washing efficiency, is capable of reducing the chlorine ion content to 0.25% or less by washing at a time, the water utilization rate is high, and the maximal slag / water ratio can reach 2.5 during the washing process.

Description

technical field [0001] The invention relates to the field of titanium extraction tailings treatment, in particular to a titanium extraction tailings washing device and process. Background technique [0002] Using TiO 2 Preparation of TiCl 4 The final tailings will produce titanium extraction tailings containing chloride ions. For example, Panzhihua Iron and Steel discharges nearly 3 million tons of high-titanium blast furnace slag every year, of which the TiO2 content is 20%-26%. In order to make full use of titanium resources, Panzhihua Iron and Steel Co., Ltd. The development of "high temperature carbonization-low temperature chlorination to produce TiCl4 process", this process produces a large amount of titanium extraction tailings after extracting the valuable element titanium, and the slag contains about 4% of chloride ions (mainly magnesium chloride, calcium chloride) form), and cannot be directly used as an admixture in the construction industry. In addition, the w...

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Problems solved by technology

[0002] Using TiO 2 Preparation of TiCl 4 The final tailings will produce titanium extraction tailings containing chloride ions. For example, Panzhihua Iron and Steel discharges nearly 3 million tons of high-titanium blast furnace slag every year, of which the TiO2 content is 20%-26%. In order to make full use of titanium resources, Panzhihua Steel development "high temperature carbonization-low temperature chlorination TiCl4 process", this process produces a large amount of titanium extraction tailings after extracting the valuable element titanium, and the slag contains about 4% of chloride ions (mainly magnesium chloride, calcium chloride) form), cannot be directly used as an admixture in the construction industry

In addition, the way of stacking will take up a lot of land and pollute the surrounding environment

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