Preparation method of high titanium slag TiO2 photocatalysed superfine fiber

Abstract

The invention relates to a preparation method of a high titanium slag TiO2 photocatalysed superfine fiber. SiO2 and other components with lower density and lower melting point are added to lower the melting temperature of titanium slag, a scorification process similar to a melt phase-separation method is adopted to make impurities float on the top of the molten slag and cooled and solidified firstly by the principle of glass phase separation, technologies of regulating titanium slag components, controlling oxygen potentials and the like are combined to remove impurities and enrich the content of the titanium, the obtained molten high titanium slag is directly formed into fiber via oxygen blowing by a high-speed centrifugal special device, and then retraining heating is carried out to convert crystal forms to manufacture discarded metallurgical titanium slag into the TiO2 superfine fiber with photocatalysis. The diameter of the high titanium slag TiO2 photocatalysed superfine fiber prepared by the method is 3-6 microns, the length is 0.9-3.0 millimeters, which is conductive to the molding of catalytic materials and greatly increases the contact area, the crystal form of TiO2 is anatase, and the high titanium slag TiO2 photocatalysed superfine fiber can be used as the catalytic decomposition material and the filter material of industrial toxic waste gas, organic sewage and waste water.

Description

technical field [0001] The present invention belongs to TiO 2 The field of photocatalytic ultrafine fibers, specifically related to a kind of high titanium slag TiO 2 Preparation method of photocatalytic ultrafine fiber. Background technique [0002] my country is rich in vanadium-titanium magnetite, mainly concentrated in the Panzhihua-Xichang area, with a prospective reserve of 10 billion tons. Vanadium-titanium magnetite ore is processed to obtain vanadium-titanium magnetite concentrate, and vanadium-titanium magnetite concentrate is smelted to obtain vanadium-containing molten iron and titanium-containing blast furnace slag, and TiO in slag 2 The content reaches 23%-30%, while the content of titanium dioxide in the refined high-titanium slag can be as high as 90%. my country discharges 2-3 million tons of titanium-containing blast furnace slag every year. Because most of this slag is highly crystalline titanium-containing minerals, it cannot be used in large quantitie...

AI Technical Summary

Problems solved by technology

So far, the utilization rate of titanium resources in titanium-containing blast furnace slag is less than 3%, so seeking new comprehensive utilization methods is still the main direction of research on the comprehensive utilization of titanium-containing blast furnace slag

[0004] TiO 2 It has good chemical stability, and is non-toxic and will not cause secondary pollution. It also has the characteristics of strong oxidation ability and high catalytic activity. It is a good antibacterial material, but pure TiO 2 The preparation is complicated and the cost is high, and the high-titanium slag replaces pure titanium dioxide as the photocatalytic material. Although the cost is low, the catalytic area is small and it is difficult to fix it as a molding device.