Method for preparing titanium-silicon-aluminum sol with photocatalytic property from blast furnace titanium slag

A technology of titanium slag and photocatalysis, applied in chemical instruments and methods, physical/chemical process catalysts, energy and wastewater treatment, etc., can solve problems such as human health and natural environmental hazards, occupying arable land area, and no treatment methods, etc., to achieve The effect of short purification treatment time, reducing a large amount of occupation, and easy operation

Active Publication Date: 2012-05-02
SOUTHWEAT UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Pangang Group Co., Ltd., located in Sichuan Province, is a steel, vanadium and titanium enterprise group directly managed by the State-owned Assets Supervision and Administration Commission of the State Council of China. The raw material for extracting titanium; after analysis and determination, the main chemical composition and weight percentage of this slag are loss on ignition 1-2%, Fe 2 o 3 2~3%, Al 2 o 3 10-20%, CaO 20-30%, MgO 5-10%, SiO 2 20-30%, K 2 O 0.5~1.5%, Na 2 O 2~3%, and TiO 2 15 to 20%, in addition to this, it also contains a very small amount of V 2 o 5 , ZnO, Cr 2 o 3 , SrO or / and BaO, etc.; this kind of titanium slag accumulates in large quantities due to no reasonable treatment method, causing a great waste of resources and occupying a large amount of cultivated land. Rainwater enters the soil and groundwater, causing great harm to human health and the natural environment

Method used

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  • Method for preparing titanium-silicon-aluminum sol with photocatalytic property from blast furnace titanium slag
  • Method for preparing titanium-silicon-aluminum sol with photocatalytic property from blast furnace titanium slag
  • Method for preparing titanium-silicon-aluminum sol with photocatalytic property from blast furnace titanium slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028]Mix the titanium slag that is ground to a particle size of less than 80 microns and sodium carbonate at a mass ratio of 1:1, place it in a high-temperature furnace for calcination at 1100°C for 2 hours, cool naturally, grind the material to a particle size of less than 80 microns, and then Mix with water according to the weight ratio of 1 part of material plus 10 parts and stir at room temperature for 120 minutes; after filtration and dissolution, the solution is ion-exchanged through a strong acidic cation exchange resin, and the solution drips from the bottom of the exchange column at a rate of every 2 1 drop per second, collect the solution after ion exchange, the solution contains ions of titanium, silicon and aluminum, remove the metal cations in the original solution, and adjust the pH of the solution to 0.5, 1, 1.5, 2, 2.5, that is, 5 parts of TiO were obtained 2 / SiO 2 / Al 2 o 3 Sol. .

[0029] Prepare 10mg / L, 20mg / L, 30mg / L, 40mg / L, 50mg / L solutions with me...

Embodiment 2

[0031] In the embodiment, the alkali uses sodium hydroxide or potassium hydroxide to replace sodium carbonate, the ratio of slag and alkali is in the range of 1: 0.5 to 1: 1.15, and the calcining temperature is in the range of 950°C to 1350°C; The block is ground in a mill until the particle size is less than 80 microns, then the ground fine powder is mixed in a weight ratio of 1:13 by fine powder: water and stirred for 100 minutes, then filtered, and the filter residue and filtrate are discarded. Ion exchange is carried out by strongly acidic cation exchange resin, and the pH value of the collected ion-exchanged solution is adjusted between 0.5 and 3 with dilute hydrochloric acid to obtain TiO 2 / SiO 2 / Al 2 o 3 Sol. The extraction rate of titanium, silicon and aluminum can reach more than 85% according to the experiment.

Embodiment 3

[0033] A method for preparing titanium-silicon-alumina sol with photocatalytic properties from blast furnace titanium slag is characterized in that it comprises the following steps:

[0034] a, grinding: the slag is placed in a mill (which can be a vibration mill or other prior art grinding equipment) and ground to a particle size of less than 80 microns to obtain slag powder;

[0035] B, slag powder and alkali mixed ball milling: take inorganic alkali and slag powder according to the weight ratio of inorganic alkali: slag powder is 1: 0.66, put into the ball mill after mixing and grind, and grind to material particle diameter less than 60 microns, make mixed Powder;

[0036] c. Calcination: In the case of high-temperature furnace under normal pressure, place the mixed powder at a sintering temperature of 800°C, heat-preserve and calcinate for 5 hours, and then cool naturally to room temperature;

[0037] d. Grinding: the calcined material is placed in a vibrating mill (or ot...

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Abstract

The invention relates to a method for preparing titanium-silicon-aluminum sol with a photocatalytic property from blast furnace titanium slag. The method is characterized by comprising the following steps of: grinding slag; mixing and ball milling organic alkaline and slag powder in a weight proportion of 1:0.66-1.15; sintering for 0.5-5 hours at the temperature of 800-1500 DEG C, cooling to roomtemperature, and grinding until the particle size of a mixed material is smaller than 80 micrometers; mixing and stirring the sintered powder and water for 30-120 minutes in a weight proportion of 1:5-20, filtering, carrying out ion exchange on the filtering liquor through strong acid cation exchange resin, adjusting the pH value of the solution to 0.5-3 to obtain the TiO2 / SiO2 / Al2O3 sol. The slag contains titanium dioxide and is the waste slag from steel making. By adopting the waste slag to prepare the sol with the photocatalytic property, the method is favorable to protecting environments;and the prepared sol has the property of common sol, and also has the functions of dissolving organic pollutants in water, purifying air, and the like.

Description

technical field [0001] The invention belongs to waste utilization and preparation methods of titanium compounds, silicon compounds and aluminum compounds, and relates to a method for preparing titanium-silicon-aluminum sol with photocatalytic performance from blast furnace titanium slag. It is suitable for preparing titanium-silicon-alumina sol with photocatalytic performance by using waste blast furnace slag as raw material. Background technique [0002] The photocatalytic process is widely used due to the effective use of ultraviolet light and visible light in sunlight, and the photocatalytic process has the advantages of good selectivity, can be carried out under normal temperature and pressure, high yield, less pollution, and wide application range. People value. In the prior art, TiO 2 Sol and gel photocatalysts have a wide range of application prospects in solar cells, organic pollutant treatment, sterilization and other environmental protection fields due to their n...

Claims

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Application Information

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IPC IPC(8): B01J21/12B01J35/00C02F1/30
CPCY02W10/37
Inventor 严云赵忠敏胡志华
Owner SOUTHWEAT UNIV OF SCI & TECH
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