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Method for converting titanium components in titanium-bearing blast furnace slag into ilmenite

A technology of blast furnace slag and ilmenite, which is applied in the field of converting titanium components into ilmenite in titanium-containing blast furnace slag, can solve the problems of complex process, high recovery cost, and high content, and achieve simple process flow and high-efficiency utilization Effect

Active Publication Date: 2020-07-24
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many types of impurities in titanium-containing blast furnace slag, the content is high, and the acid consumption is large, resulting in a large amount of waste acid and tailings, causing serious pollution to the environment.
(3) Titanium extraction by alkaline method: this method combines titanium-containing blast furnace slag with NaOH or Na 2 CO 3 Alkaline reagents are reacted at high temperature and then leached and separated to prepare titanium dioxide. However, due to the large amount of alkali consumed in the leaching process, the recovery cost is high, the process is complicated, and it is only suitable for treating titanium-rich slag. Processing at high temperature will produce severe air pollution
Due to the small particle size and low hardness of the perovskite phase in this method, it is difficult to obtain an optional particle size, resulting in a low recovery rate of titanium, and secondary pollution due to the large amount of chemicals used in the beneficiation process

Method used

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  • Method for converting titanium components in titanium-bearing blast furnace slag into ilmenite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The titanium-containing blast furnace slag and iron oxide scale are dried and pulverized, and the coke block is pulverized and sieved to obtain powders of 100-300 mesh respectively. Mix the obtained titanium-containing blast furnace slag, iron oxide scale, coke powder and silicon dioxide in a mass ratio of 10:4.0:0.45:2.5, and press it into a disc under a pressure of 1Mpa. The diameter of the obtained tablet is 5mm , the thickness is 2mm. Put the obtained tablet into an alumina crucible, then put the alumina crucible into a high-temperature furnace, first pass argon gas for 30 minutes to drive away the air in the furnace cavity, then start heating up, and react at a temperature of 1375°C for 240 minutes. After the reaction was completed, it was cooled to 1000°C with the furnace. During the process, the argon gas protection was always passed, and then the alumina crucible was taken out and cooled to room temperature naturally. The titanium-containing component in the obt...

Embodiment 2

[0024] Dry and pulverize the titanium-containing blast furnace slag and iron oxide scale, and pulverize the coke blocks, and then sieve them to obtain powders of 100-200 mesh respectively. Mix the obtained titanium-containing blast furnace slag, iron oxide scale, coke powder and silicon dioxide in a mass ratio of 10:3.5:0.4:2, and press it into a disc under a pressure of 5 MPa. The diameter of the obtained tablet is 10mm , the thickness is 4mm. Put the obtained tablet into an alumina crucible, then put the alumina crucible into a high-temperature furnace, first pass argon gas for 30 minutes to drive away the air in the furnace cavity, then start heating up, react at 1300°C for 420 minutes, and heat up And the reaction process is protected by argon, and the furnace is cooled to 1000 ° C. After the reaction, the alumina crucible is taken out and cooled to room temperature naturally. The titanium-containing component in the obtained synthetic slag has been converted into ilmenite...

Embodiment 3

[0026] The titanium-containing blast furnace slag and iron oxide scale are dried and pulverized, and the coke block is pulverized and sieved to obtain powders of 200-300 mesh respectively. Mix the obtained titanium-containing blast furnace slag, iron oxide scale, coke powder and silicon dioxide in a mass ratio of 10:3.0:0.3:1.5, and press it into a disc under a pressure of 1Mpa. The diameter of the obtained tablet is 5mm , the thickness is 2mm. Put the obtained pellets into an alumina crucible, then put the alumina crucible into a high-temperature furnace, first pass argon gas for 30 minutes to drive away the air in the furnace cavity, then start heating up, and react at a temperature of 1450°C for 240 minutes , after the reaction was completed, it was cooled to 1000°C with the furnace, and the argon gas was kept flowing during the process, and then the alumina crucible was taken out and cooled to room temperature naturally. Figure with figure 2 almost the same.

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Abstract

The invention discloses a method for converting titanium components in titanium-bearing blast furnace slag into ilmenite, and belongs to the field of comprehensive utilization of metallurgical solid wastes. The method comprises the following steps of, (1) uniformly mixing titanium-bearing blast furnace slag with iron oxide scale, silicon dioxide and coke, pressing the mixture into a round sheet, and controlling the mass ratio and the pressing pressure of the titanium-bearing blast furnace slag, the iron oxide scale, the silicon dioxide and the coke; and (2) putting the obtained sheet into an alumina crucible and then into a high-temperature furnace, introducing argon to exhaust air in the furnace chamber, starting heating up, carrying out reaction for 240-420 min at the temperature of 1300-1450 DEG C, cooling to 1000 DEG C after reaction, introducing the argon for protection in the whole process, taking out the alumina crucible, and naturally cooling the alumina crucible to room temperature. According to the method, the reaction process is simple, the ilmenite in the obtained synthetic slag can be separated and enriched by magnetic separation and can be used as a material for titanium extraction; and tailings after magnetic separation can be used for making building materials, so that the efficient utilization of the titanium-bearing blast furnace slag is realized.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of metallurgical solid waste, in particular to a method for converting titanium components in titanium-containing blast furnace slag into ilmenite (FeTiO 3 )Methods. Background technique [0002] Titanium is an important strategic resource. Titanium metal and its compounds are often widely used in aviation, aerospace, vehicle engineering and biomedicine. In China, vanadium-titanium magnetite resource reserves are abundant, especially in Panzhihua area, accounting for about 1 / 3 of the world's titanium resource reserves, but the current utilization rate of titanium resources in my country is low. After the vanadium-titanium magnetite concentrate enters the blast furnace for smelting, the iron and vanadium in it are reduced and transformed into metals for recycling, and titanium enters the slag phase to form titanium-containing blast furnace slag with complex mineral phase composition and st...

Claims

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Application Information

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IPC IPC(8): C21B3/04C22B7/04C22B1/14C22B34/12C21B11/00
CPCC21B3/04C21B11/00C22B1/14C22B7/04C22B34/1218Y02W30/50Y02P10/20
Inventor 李辽沙吴计划王平申星梅曹发斌武杏荣
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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