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Process for extracting titanium from titanium-containing blast furnace slag through aluminothermic method

A slag aluminothermic and blast furnace slag technology, applied in the field of metallurgy and chemical industry, can solve problems such as restricting large-scale use, and achieve the effects of reducing viscosity, simple process flow and increasing basicity

Inactive Publication Date: 2013-06-26
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few steel types that require titanium, silicon and aluminum as alloying agents at the same time, which limits the large-scale use of this method.

Method used

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  • Process for extracting titanium from titanium-containing blast furnace slag through aluminothermic method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0021] 1) Crush and grind titanium-containing blast furnace slag to 180 mesh, and mix well.

[0022] 2) According to the mass ratio of slag:Al:CaO=100:25.98:0, weigh 15.875 grams of titanium-containing blast furnace slag and 4.125 grams of Al powder.

[0023] 3) In an argon protective atmosphere, raise the temperature of the tubular electric furnace to 1600°C. Put the mixed ingredients into the alumina crucible, put the heat into the electric tube furnace, and keep it warm for 10 minutes.

[0024] 4) After the heat preservation is completed, heat it at 1600℃, directly put it in water to cool, and then put it in a drying oven to dry.

[0025] 5) The slag is separated from the alloy, and the slag sample is taken for XRF analysis.

Embodiment approach 2

[0027] 1) Crush and grind titanium-containing blast furnace slag to 180 mesh, and mix well.

[0028] 2) According to the mass ratio of slag:Al:CaO=100:25.98:2.5, weigh 15.567 grams of titanium-containing blast furnace slag, 4.044 grams of Al powder, and 0.389 grams of CaO powder.

[0029] 3) In an argon protective atmosphere, raise the temperature of the tubular electric furnace to 1550°C. Put the mixed ingredients into the alumina crucible, put the heat into the electric tube furnace, and keep it warm for 20 minutes.

[0030] 4) After the heat preservation is completed, heat it at 1600℃, directly put it in water to cool, and then put it in a drying oven to dry.

[0031] 5) The slag is separated from the alloy, and the slag sample is taken for XRF analysis.

Embodiment approach 3

[0033] 1) Crush and grind titanium-containing blast furnace slag to 180 mesh, and mix well.

[0034] 2) According to the mass ratio of slag:Al:CaO=100:25.98:5, weigh 15.269 grams of titanium-containing blast furnace slag, 3.967 grams of Al powder, and 0.764 grams of CaO powder.

[0035] 3) In an argon protective atmosphere, raise the temperature of the tubular electric furnace to 1750°C. Put the mixed ingredients into the alumina crucible, put the heat into the electric tube furnace, and keep it warm for 30 minutes.

[0036] 4) After the heat preservation is completed, heat it at 1600℃, directly put it in water to cool, and then put it in a drying oven to dry.

[0037] 5) The slag is separated from the alloy, and the slag sample is taken for XRF analysis.

[0038]

[0039] Table 1 shows the XRF component analysis results of 3 examples of the present invention.

[0040] Al 2 O 3 CaO MgOSiO 2 TiO 2 Original titanium-bearing blast furnace slag15.3526.469.4026.7622.03 Slag: Al: CaO=...

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Abstract

The invention relates to a process for extracting titanium from titanium-containing blast furnace slag through an aluminothermic method, and the process comprises the following steps of: crushing the titanium-containing blast furnace slag which contains the main components of TiO2, SiO2, CaO, Al2O3 and MgO, and grinding to 180 meshes; blending slag, aluminum powder and CaO according to a certain mass ratio; aluminothermic reduction: raising the temperature of an electric tube furnace to set the temperature at the atmosphere of argon shield, placing a blended mixture into an aluminum oxide crucible, placing into the electric tube furnace at high temperature, and preserving the temperature for a certain time; water cooling: taking out at high temperature, and placing into water for cooling; and mechanically separating the slag and an alloy. According to the invention, the completely preprocessed titanium-containing blast furnace slag is reduced by using the aluminum powder, and the slag and metal are separated through the water cooling after the reduction is completed; and finally, the main components of the slag are CaO, MgO and Al2O3, the metal components are Si and Ti, and the slag also contains a small amount of Al.The process disclosed by the invention is simple in process and stable in process parameter, and can realize the enriched extraction of titanium contained in blast furnace slag in a short time.

Description

technical field [0001] The invention relates to the technical field of metallurgy and chemical industry, in particular to an aluminothermic process for extracting titanium from titanium-containing blast furnace slag. Background technique [0002] my country is rich in titanium resources, ranking first in the world, but the utilization rate of titanium resources is very low. At present, about 90% of my country's titanium resources are stored in the Panzhihua area in the form of vanadium-titanium magnetite. At present, Panzhihua Iron and Steel mainly uses the blast furnace process to smelt vanadium-titanium magnetite, and recovers iron and vanadium, while titanium is TiO 2 Form into blast furnace slag (mass fraction about 25%), due to the complex mineral phase structure, it is difficult to recycle. At present, more than 70 million tons of titanium-containing blast furnace slag have been accumulated, and it is still increasing at a rate of 3 million tons per year. A large a...

Claims

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Application Information

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IPC IPC(8): C22B7/04C22B5/04C22B34/12
CPCY02P10/20
Inventor 张国华甄玉兰周国治
Owner UNIV OF SCI & TECH BEIJING
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