High-titanium and low-silicon titanium-silicon-iron alloy and preparation method thereof

A ferro-titanium alloy and high-titanium technology, which is applied in the field of high-titanium-low-silicon ferro-titanium alloy and its preparation, can solve the problems of resource scarcity and high production cost of ferro-titanium, and achieve improved alloy yield and increased alloy yield , The effect of inhibiting the formation of TiO

Active Publication Date: 2012-06-27
PANZHIHUA GANGCHENG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the main raw material of titanium micro-alloy steel, ferro-titanium is becoming more and more scarce as the price of ilmenite continues to rise, and the production cost of ferro-titanium is getting higher and higher.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] After the slag tank was transported from the ironworks to the blast furnace slag titanium extraction production line, 11.4 tons of molten blast furnace slag was poured into a 9000KVA electric furnace with a tilting machine, and the temperature was measured, and the temperature of the molten slag was 1250 °C. Graphite electrodes are used to raise the temperature of the molten pool to above 1500°C. Then open the feeding valve, first add 15% admixture, the total amount of admixture is 4.56 tons, the composition is: 80wt% reducing agent, 20wt% cold state high titanium type blast furnace slag. Lower the electrode to start the arc, and after the reaction is ignited, the remaining admixture is added to the furnace for rough refining in 5 times. Among them, the composition of molten high-titanium blast furnace slag: TiO 2 Content is 15.14wt%, SiO 2 is 24.28wt%, and TFe is 0.5wt%. The ratio of blast furnace slag to admixture is 1:0.40. The composition of the reducing agent i...

Embodiment 2

[0066] After the slag tank was transported from the ironworks to the blast furnace slag titanium extraction production line, 14.3 tons of molten blast furnace slag was poured into a 9000KVA electric furnace with a tilting machine, and the temperature was measured at 1360 °C. Heating to above 1500°C with graphite electrodes. Then open the feeding valve, first add 20wt% admixture. The total amount of additives is 7.15 tons, and the composition is: 70wt% reducing agent, 20wt% high-titanium slag, 8wt% cold high-titanium blast furnace slag, 2wt% slagging agent; the slag adjusting agent is Panzhihua steel slag. TiO in high titanium slag 2 The content is 74.87wt%. The reducing agent is 100wt% metal aluminum. Lower the electrode, start the arc, ignite the reaction, and then add the remaining admixture into the furnace for rough refining in 7 times. Among them, molten high-titanium blast furnace slag TiO 2 Content is 20.87wt%, SiO 2 is 25.28wt%, and TFe is 0.5wt%. The ratio of b...

Embodiment 3

[0068] After the slag tank from the ironworks is transported to the blast furnace slag titanium extraction production line, the molten blast furnace slag is poured into a 9000KVA electric furnace with a tilting machine, and the amount of molten slag loaded is 8.2 tons. temperature measurement. The slag temperature was 1380°C. Use graphite electrodes to heat to above 1500°C, first add 12% admixture, the total amount of admixture is 4.92 tons, and the composition is: reducing agent 65wt%, waste titanium material 12wt%, cold state high-titanium blast furnace slag 13wt%, slag iron 7wt%, 3wt% slagging agent; slag adjusting agent is fluorite. Lower the electrode to start the arc, ignite the reaction, and then add the remaining admixture to the furnace in 5 times. Among them, the molten high-titanium blast furnace slag has a TiO2 content of 21.14wt%, a SiO2 content of 24.80wt%, and a TFe content of 1.2wt%. The ratio of blast furnace slag to admixture is 1:0.6. The Ti content in t...

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Abstract

The invention discloses a high-titanium and low-silicon titanium-silicon-iron alloy and a preparation method thereof, which belong to the technical fields of vanadium-titanium resource comprehensive utilization and iron alloy smelting. The titanium-silicon-iron alloy is characterized in that: the titanium content is higher than 40 percent by weight, and contains 40-70 percent by weight of Ti, 8-40 percent by weight of Si, 3-15 percent by weight of Fe and unavoidable impurities. In preparation method of the titanium-silicon-iron alloy, the high-titanium and low-silicon titanium-silicon-iron alloy is prepared by adding an admixture into high-titanium blast furnace slag and undergoing a melting thermal reduction reaction, wherein the weight proportion of the high-titanium blast furnace slag to the admixture is 1:(0.4-0.8); the admixture comprises 40-80 percent by weight of a reducing agent; and the major component of the reducing agent is metal aluminum. The titanium-silicon-iron alloy disclosed by the invention instead of titanium and iron can be taken as a titanium alloy agent, and the popularization and application of the titanium-silicon-iron alloy can be promoted; and according to the method disclosed by the invention, improvement on the environment is facilitated, and the resource utilization ratio is increased.

Description

technical field [0001] The invention belongs to the technical field of ferroalloy smelting, and in particular relates to a high-titanium-low-silicon titanium-silicon ferroalloy and a preparation method thereof. Background technique [0002] Vanadium-titanium magnetite is smelted by blast furnace, and about 50% of TiO in the raw ore 2 Into the blast furnace slag, forming high-titanium type blast furnace slag, the main chemical composition is TiO 2 15~26%; CaO 24~35%; SiO 2 22~25%; Al 2 o 3 13~14%; MgO 8~10%; Fe 2 o 3 1~3%; MnO<1%. Titanium in the slag is dispersed in minerals such as perovskite, titanium-rich diopside, pantitanium diopside, spinel and titanium carbonitride. Using high-titanium type blast furnace slag to prepare titanium-silicon ferroalloy is one of the effective ways to extract titanium element in high-titanium type blast furnace slag and comprehensively utilize blast furnace slag. However, in the various methods of preparing titanium-containin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00C22C30/00C22C1/02C22C1/06C22B4/06C22B9/10C22B5/04
Inventor 敖进清吴斌李坚余韵何奇张建磊杨志远
Owner PANZHIHUA GANGCHENG GROUP
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