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Method for recovering titanium dioxide from blast furnace slag of vanadium titano-magnetite

A vanadium-titanium magnetite and titanium dioxide technology, applied in the field of smelting, can solve the problems of high acidification and hydrolysis reaction conditions, high energy consumption, and low utilization coefficient of blast furnaces, and achieve the effect of increasing the amount of perovskite formation and low energy consumption

Inactive Publication Date: 2010-06-09
邓元忠
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

After Panzhihua Iron & Steel was put into production in the 1970s, the operation of the blast furnace was not smooth, and the utilization coefficient of the blast furnace was not high, which was lower than 1 for a long time. The enterprise suffered losses and production was difficult to organize.
This recovery method adopts the method of acidification, hydrolysis and calcination after pulverization and grinding. On the one hand, the procedure is complicated, and acidification reaction and hydrolysis are required, and a calcination process is required; When the hydrolysis can be completely completed, titanium will be wasted as waste because it cannot be recovered; moreover, special auxiliary equipment for calcination is required in the calcination process, which not only increases the length of the recovery process, but also increases the recovery process. cost, and consumes a lot of energy

Method used

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Effect test

Embodiment 2

[0026] A method for recovering titanium dioxide from vanadium-titanium-magnetite blast furnace slag, characterized in that it specifically comprises the following steps:

[0027] A, the liquid state high-temperature slag discharged in the blast furnace is collected in the slag tank that unslaked lime CaO is housed, and its purpose is to increase the amount of perovskite formation, wherein lime accounts for 3% of slag weight, obtains liquid state perovskite;

[0028] B. Send the slag tank to the tunnel kiln;

[0029] C. Use the temperature of the slag itself to keep the temperature at 1000°C in the tunnel kiln for 48 hours and let some substances in the liquid mixture crystallize in this state. The crystals formed by different substances will complete the sedimentation and differentiation under the action of gravity according to the weight. Obtain the golden yellow pantitanium diopside cooled down in aphanitic form at normal temperature;

[0030] D. Manually remove the slag on...

Embodiment 3

[0034] A method for recovering titanium dioxide from vanadium-titanium-magnetite blast furnace slag, characterized in that it specifically comprises the following steps:

[0035] A, the liquid state high-temperature slag discharged in the blast furnace is collected in the slag tank that unslaked lime CaO is housed, and its purpose is to increase the amount of perovskite formation, wherein lime accounts for 5% of slag weight, obtains liquid state perovskite;

[0036] B. Send the slag tank to the tunnel kiln;

[0037] C. Use the temperature of the slag itself to keep the temperature at 1050°C in the tunnel kiln for 50 hours and let some substances in the liquid mixture crystallize in this state. The crystals formed by different substances will complete the sedimentation and differentiation under the action of gravity according to the weight. The golden-yellow pantitanium diopside cooled down in aphanitic form at normal temperature is obtained, wherein pantitanium diopside accounts...

Embodiment 4

[0042] A method for recovering titanium dioxide from vanadium-titanium-magnetite blast furnace slag, characterized in that it specifically comprises the following steps:

[0043] A, the liquid state high-temperature slag discharged in the blast furnace is collected in the slag tank that unslaked lime CaO is housed, and its purpose is to increase the amount of perovskite formation, wherein lime accounts for 5% of slag weight, obtains liquid state perovskite;

[0044] B. Send the slag tank to the tunnel kiln;

[0045] C. Use the temperature of the slag itself to keep the temperature at 1050°C in the tunnel kiln for 60 hours and let some substances in the liquid mixture crystallize in this state. The crystals formed by different substances will complete the sedimentation and differentiation under the action of gravity according to the weight. The golden-yellow pantitanium diopside cooled down in aphanitic form at normal temperature is obtained, wherein pantitanium diopside accoun...

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Abstract

The invention relates to a method for recovering titanium dioxide from blast furnace slag of vanadium titano-magnetite. The method comprises the following steps of: A. collecting liquid high-temperature furnace slag discharged from a blast furnace into a slag tank loaded with quick lime to obtain liquid perovskite; B. conveying the slag tank to a tunnel kiln; C. crystallizing, precipitating and differentiating to obtain Panzhihua titandiopside; D. clearing away the furnace slag from the Panzhihua titandiopside; E. displacing chlorine gas; and F. separating out titanium dioxide. By carrying out crystallization, differentiation, slowly cooling and precipitation on the schreyerite blast furnace slag by adopting a physics method, the invention realizes recovering the titanium dioxide in the furnace slag in the slag tank and the tunnel kiln without other special equipment, and has low cost, simple and convenient operation in a whole recovering process, and remarkable recovering effect.

Description

technical field [0001] The invention relates to a smelting technology, in particular to a method for recovering titanium dioxide from vanadium-titanium magnetite blast furnace slag. Background technique [0002] The abundant vanadium-titanium magnetite in the Panxi area is high-titanium type, and it is the most difficult to smelt ore in the world. In order to develop and utilize these precious resources, the country has concentrated its national strength three times to carry out technical research and invented China's unique smelting technology. , that is, the spray gun plus the corresponding slagging smelting process solves the problem of iron tapping. After Panzhihua Iron & Steel was put into operation in the 1970s, the operation of the blast furnace was not smooth, and the utilization coefficient of the blast furnace was not high, which was lower than 1 for a long time. The enterprise suffered losses and production was difficult to organize. In this research, the ore use...

Claims

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Application Information

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IPC IPC(8): C22B34/12C22B7/04C01G23/047
CPCY02P10/20
Inventor 邓兴民邓刚邓元忠
Owner 邓元忠
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