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Production method of high-quality ferro-titanium

A production method and high-quality technology, applied in the field of ferroalloy smelting, can solve problems such as large fluctuations in ferro-titanium, high hardness of ferro-titanium alloy, difficulty in crushing, and influence on precise control, etc., to achieve low content of impurities and harmful elements, simple and easy production method Line, solve the effect of difficult control

Active Publication Date: 2017-07-04
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Judging from the published invention patents, the production of ferro-titanium mainly uses ilmenite, titanium slag, rutile and other titanium-containing materials as titanium sources, aluminum, magnesium, carbon, etc. as reducing agents, and lime, fluorite, etc. Slag agent, some inventions also use potassium chlorate as the ignition agent. Although these methods can successfully produce titanium-iron alloys with different titanium contents, the methods have disadvantages such as violent reaction, short reaction time, long production cycle, large fluctuations in alloy composition, and high impurity content. , which greatly affects the composition precision control of titanium alloy steel grades
For example: the alloys with different titanium content produced by the above methods are in different states. Ferro-titanium alloys with low titanium content are easy to pulverize, and ferro-titanium alloys with high titanium content are hard to break. Quantity control is difficult
The ferro-titanium produced by the existing method fluctuates greatly in composition, and contains high content of impurity elements at the same time, so the requirements of the national standard for the composition of the ferro-titanium are relatively broad (the chemical composition of the ferro-titanium in the national standard is shown in Table 1), silicon, manganese, The content of aluminum can be 1% or more, the content of phosphorus and sulfur is relatively high, and high-grade ferro-titanium still has problems such as high content of oxygen and nitrogen (such as the nitrogen content of FeTi70 is as high as 0.80%, and the oxygen content is above 5.00%). Both greatly affect the precise control of molten steel composition and the control of harmful elements in the process of titanium alloying

Method used

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  • Production method of high-quality ferro-titanium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Use a crucible furnace to melt the extra sponge titanium (titanium content 99.8%) in vacuum, and raise the temperature to 1700°C; use an induction furnace to melt pure iron ([C]+[Si]+[Mn]+[P ]+[S]+[Al]+[V]+[Ti]3 / (min·t), the argon blowing time is 10min; after the homogenization is completed, the ferro-titanium alloy solution is plate-cast under vacuum conditions, and the ferro-titanium alloy is crushed and packaged after the alloy is cooled to 100°C or below. The Ti content in the obtained ferro-titanium alloy is 29.87%, and the total content of other elements except iron is less than 0.5%.

Embodiment 2

[0038] The titanium shavings (titanium content 99.5%) were melted in an Ar gas protection atmosphere by using a resistance furnace, and the temperature was raised to 1690 °C; the pure molten iron was heated to 1700 °C by a resistance furnace in an Ar gas protection atmosphere (the [C ]+[Si]+[Mn]+[P]+[S]+[Al]+[V]+[Ti]3 / (min·t), the argon blowing time is 3min; after the homogenization is completed, the ferro-titanium alloy solution is plate-cast under vacuum conditions, and the ferro-titanium alloy is broken and packaged after the alloy is cooled to 100°C or below. The Ti content in the obtained ferro-titanium alloy is 69.79%, and the total content of other elements except iron is less than 0.4%.

Embodiment 3

[0040] Titanium chips (titanium content 99.9%) are melted in a vacuum by a resistance furnace, and the temperature is raised to 1695°C; pure iron powder ([C]+[Si]+[Mn]+[P] +[S]+[Al]+[V]+[Ti]<1%) melted and heated to 1700°C after melting; the weight ratio of iron source and titanium source is 5:5, after the two raw materials are heated to the predetermined After heating, under vacuum conditions, the molten iron source and titanium source are hedged and mixed into the red hot alloy ladle, and the composition is homogenized and impurity is controlled by blowing argon gas at the bottom of the ladle, and the argon strength is provided. The temperature is 0.25m3 / (min·t), and the argon blowing time is 15 minutes; after the homogenization is completed, the ferro-titanium alloy solution is plate-cast under vacuum conditions, and the ferro-titanium alloy is crushed and packaged after the alloy is cooled to 100°C or below. The Ti content in the obtained ferro-titanium alloy is 49.81%, an...

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Abstract

The invention relates to a production method of high-quality ferrotitanium, belongs to the technical field of ferroalloy smelting, and aims at providing a production method of high-quality ferrotitanium. In the invention, high-titanium and low-impurity content materials such as offgrade titanium sponge, titanium (alloy) scrap and titanium (alloy) shavings are adopted as titanium raw materials, and pure iron (powder, block and water) is used as an iron source; the titanium raw materials and iron source are separately molten in a vacuum or inert gas shielding condition and are heated to 1690 DEG C or over respectively; and the two molten metals are counter-mixed according to the required ferrotitanium grade, argon is blown from the bottom, and casting and cooling are performed to obtain the high-quality ferrotitanium. By adopting the method provided by the invention, ferrotitanium-series products with different requirements on titanium content can be produced; and moreover, the production method has the advantages of simplicity and easiness in implementation, high content control precision, low content of impurities and harmful elements and high quality of ferrotitanium products while the problems of great control difficulty and high impurity content of traditional ferrotitanium production technology are effectively solved.

Description

technical field [0001] The invention relates to a production method of high-quality ferro-titanium, belonging to the technical field of ferroalloy smelting. Background technique [0002] Titanium can increase the wear resistance and tensile strength of steel, and can be used as a deoxidizer and degasser. The deoxidation ability of titanium is much higher than that of silicon and manganese, and it can reduce the segregation of steel ingots, improve the quality of steel ingots and increase the yield. Titanium has a low specific gravity of only 4.5 g / ml, a high melting point of 1690°C, and is easily oxidized. It is oxidized and burned on the liquid steel surface, resulting in too much loss, and it is difficult to control the content. The preparation process is complicated, the production cost is high, the price is expensive, etc., so it is not suitable to directly add to molten steel in the state of pure metal and non-metal monomer during steelmaking. For this reason, metallu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C14/00C22C1/02C22C35/00C22C33/04C22C38/14
CPCC22C1/02C22C14/00C22C33/04C22C35/00C22C38/14
Inventor 戈文荪陈炼冉茂华王建曾建华张国才成波仲剑丽
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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