Method for producing artificial rutile by utilizing titanium-containing blast furnace slag

A technology of artificial rutile and blast furnace slag, applied in the direction of titanium dioxide, process efficiency improvement, titanium oxide/hydroxide, etc., can solve the problems of small-scale utilization, poor economic benefits, and difficult separation, and achieve simple equipment and less impurities in the product , The effect of short process flow

Active Publication Date: 2013-06-12
PEKING UNIV
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Problems solved by technology

However, due to the TiO in perovskite 2 The theoretical content of perovskite is only 58%, and the density of perovskite is similar to the glass phase, which makes subsequent separation difficult and difficult for practical application.
[0011] In summary, although a lot of research has been done on the development and utilization of titanium-containing blast furnace slag, there are still a series of problems such as poor economic benefits, small-scale utilization, and serious secondary pollution.

Method used

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  • Method for producing artificial rutile by utilizing titanium-containing blast furnace slag
  • Method for producing artificial rutile by utilizing titanium-containing blast furnace slag

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Experimental program
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Effect test

Embodiment 1

[0025] With titanium-containing blast furnace slag (its main component is calculated by weight percentage: SiO 2 content of 24.26%, CaO content of 26.86%, Al 2 o 3 content of 13.04%, MgO content of 6.93%, TiO 2 Content is 22.58%), high-titanium electric furnace slag (its main component is calculated by weight percentage: SiO 2 content of 5.39%, CaO content of 4.00%, Al 2 o 3 content of 19.35%, MgO content of 12.52%, TiO 2 content of 50.98%) and silicon dioxide in a ratio of 8:1:2.2 by weight, put them into a platinum crucible, heat up to 1500°C in a silicon-molybdenum rod high-temperature furnace, keep the temperature in an air atmosphere for 1 hour, and then quickly Lower the temperature to 1260°C and keep it warm for 5 hours, take out the sample and water-cool it, and finally separate the artificial rutile crystals from the residue by flotation beneficiation to obtain rod-shaped artificial rutile, and the remaining residue is used to produce cement.

[0026] The above-...

Embodiment 2

[0030] With titanium-containing blast furnace slag (its main component is calculated by weight percentage: SiO 2 content of 24.26%, CaO content of 26.86%, Al 2 o 3 content of 13.04%, MgO content of 6.93%, TiO 2 Content is 22.58%), high-titanium electric furnace slag (its main component is calculated by weight percentage: SiO 2 content of 5.39%, CaO content of 4.00%, Al 2 o 3 content of 19.35%, MgO content of 12.52%, TiO 2 content of 50.98%) and silicon dioxide in a weight ratio of 9:1:2.8, put them into a platinum crucible, heat up to 1500°C in a silicon-molybdenum rod high-temperature furnace, keep the temperature constant for 1h in an air atmosphere, and then quickly cool down to 1200°C Insulate at ℃ for 2 hours, take out the sample and water-cool, and finally separate the artificial rutile crystals from the residue by gravity separation to obtain rod-shaped artificial rutile, and the remaining residue is used to produce cement.

Embodiment 3

[0032] With titanium-containing blast furnace slag (its main component is calculated by weight percentage: SiO 2 content of 24.26%, CaO content of 26.86%, Al 2 o 3 content of 13.04%, MgO content of 6.93%, TiO 2 Content is 22.58%), high-titanium electric furnace slag (its main component is calculated by weight percentage: SiO 2 content of 5.39%, CaO content of 4.00%, Al 2 o3 content of 19.35%, MgO content of 12.52%, and TiO2 content of 50.98%) and silicon dioxide are fully mixed in a weight ratio of 8:2:2.5, put into a platinum crucible, and heat up to 1500°C in a silicon-molybdenum rod high-temperature furnace , in an oxygen atmosphere at a constant temperature for 0.5h, then first lower the temperature to 1300°C, and then cool down to 1100°C at a cooling rate of 200°C / h, then cool to room temperature with the furnace, and finally separate the artificial rutile crystals from the residue by flotation beneficiation , to obtain rod-shaped artificial rutile, and the remaining ...

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Abstract

The invention provides a method for producing artificial rutile by utilizing titanium-containing blast furnace slag. The method comprises the following steps of: firstly, modifying titanium-containing blast furnace slag with high-titanium electric furnace slag and silicon dioxide in air or oxygen atmosphere; then, carrying out heat insulation on the modified titanium-containing blast furnace slagat the temperature of 1500-1600 DEG C for 0.5-1 hour, and cooling and crystallizing to obtain rutile crystal; and finally, separating by a mineral separation method to obtain rutile crystal. The method provided by the invention has the characteristics that: the self-high heat characteristic of the titanium-containing blast furnace slag is sufficiently utilized, and the titanium-containing blast furnace slag is modified, thus artificial rutile with a high titanium dioxide grade is obtained; the separated residues can be used for producing slag cement; the process flow is short; the equipment is simple; the heat energy carried by the titanium-containing blast furnace slag can be sufficiently utilized; the content of impurities in the product is low; and the environmental pollution is avoided.

Description

technical field [0001] The invention relates to a method for comprehensively utilizing titanium-containing slag, in particular to a method for producing artificial rutile by utilizing titanium-containing blast furnace slag. Background technique [0002] As we all know, China is rich in titanium reserves, ranking first in the world, and about 90% of the titanium elements exist in the Panzhihua-Xichang area in southwest China in the form of vanadium-titanium magnetite. Since vanadium-titanium magnetite is a polymetallic symbiotic ore, about 50% of the titanium element in the vanadium-titanium magnetite raw ore enters the iron concentrate through the beneficiation process. Iron concentrate is further processed to extract valuable elements such as iron, vanadium and titanium. At present, China mainly uses the blast furnace process to process iron ore concentrate. The iron and vanadium in the iron concentrate can be effectively extracted through the blast furnace process, while...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/04C01G23/047
CPCY02P10/20
Inventor 王习东张作泰李静刘丽丽
Owner PEKING UNIV
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