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Preparation method of high titanium slag TiO2 photocatalysed superfine fiber

A technology of ultra-fine fiber and high titanium slag, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of small catalytic area, complicated preparation, high cost, etc., and achieve the goal of increasing the contact area Effect

Inactive Publication Date: 2010-08-25
鹤壁洁联新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 1) TiO 2 The mass fraction is 30-95% of the vanadium-titanium iron ore smelting blast furnace titanium-containing waste slag pulverized into particles with a particle size of 5 μm, and then adding metallurgical waste of 1.5% by weight of titanium slag to obtain a mixture, the metallurgical waste Contains Si0 2 and MnO 2 , metallurgical waste slag basicity R (Ca0 / Si0 2 ) is 1.2;

[0017] 2) Put the mixture into the melting furnace, and inject oxygen into the melting furnace, and raise the temperature of the melting furnace under the condition that the oxygen partial pressure in the furnace is 10.13Pa to melt the mixture. After the mixture is melted, continue to maintain the oxygen in the furnace. Partial pressure for 7 minutes;

[0018] 3) Gradually lower the furnace temperature at 0.5°C / min, and at the same time, separate the cooled and solidified impurity scum from the enriched molten titanium dioxide by blowing off air to obtain molten high-titanium slag;

[0019...

Embodiment 2

[0022] 1) TiO 2 The high-titanium blast furnace water-quenched slag with a mass fraction of 30-95% is crushed into particles with a particle size of 8 μm, and then metallurgical waste with a weight of 2% of the titanium slag is added to obtain a mixture, and the metallurgical waste contains Si0 2 and A1 2 0 3 , metallurgical waste slag basicity R (Ca0 / Si0 2 ) is 2;

[0023] 2) Put the mixed material into the melting furnace, and blow oxygen into the melting furnace, and raise the temperature of the melting furnace under the condition that the oxygen partial pressure in the furnace is 101.3 to melt the mixed material. After the mixed material is melted, continue to maintain the oxygen content in the furnace Press for 5 minutes;

[0024] 3) Gradually lower the furnace temperature at 2°C / min, and at the same time, separate the cooled and solidified impurity scum from the enriched molten titanium dioxide by blowing off air to obtain molten high-titanium slag;

[0025] 4) The ...

Embodiment 3

[0028] 1) TiO 2 The mass fraction of 30-95% of smelting sponge titanium high-titanium slag is crushed into particles with a particle size of 12 μm, and then metallurgical waste with a weight of 2.5% of titanium slag is added to obtain a mixture, and the metallurgical waste contains Si0 2 and MgO, metallurgical waste slag basicity R (Ca0 / Si0 2 ) is 1.8;

[0029] 2) Put the mixed material into the melting furnace, and blow oxygen into the melting furnace, and raise the temperature of the melting furnace under the condition that the oxygen partial pressure in the furnace is 1013Pa to melt the mixed material. After the mixed material is melted, continue to maintain the oxygen content in the furnace Press for 6 minutes;

[0030] 3) Then gradually lower the furnace temperature at 3°C / min, and at the same time, separate the cooled and solidified impurity scum from the enriched molten titanium dioxide by blowing off air to obtain molten high-titanium slag;

[0031] 4) The molten high...

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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...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J35/06
Inventor 陈均志郑小鹏
Owner 鹤壁洁联新材料科技有限公司
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