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Method for preparing ferro-titanium

A technology of ferro-titanium alloy and titanium slag, which is applied in the field of titanium smelting, can solve the problems of high smelting cost, high reducing agent content, and increased production cost of products, and achieve the effect of reducing production cost and simple operation

Inactive Publication Date: 2014-01-01
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above methods have their own shortcomings. Among them, the ferro-titanium alloy prepared by thermal reduction has problems such as high oxygen content in the alloy and high reducing agent content in the product, and the high cost of the reducing agent indirectly increases the production cost of the product; while the electric deoxidation process Due to its technical characteristics, the deoxidation of the product is not complete and the current efficiency is low, and it is still in the laboratory research stage; for vacuum melting, its own raw materials and smelting costs are very high, which makes the production cost of titanium ferroalloy remain high. large-scale use

Method used

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Examples

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Comparison scheme
Effect test

example 1

[0029] Melt 2t of titanium concentrate in an electric furnace at 1600°C. At the end, add 1.15t of potassium carbonate to the furnace and feed 250Nm 3 / min Oxygen stirring for 10 minutes, adding 100kg of iron, inserting graphite anode and connecting the molten iron cathode at the bottom, performing electrolysis at a constant voltage of 3V for 2 hours, and discharging hot molten iron and liquid titanium-iron alloy in argon protective atmosphere for cooling. Finally, dilute hydrochloric acid with a concentration of 2% was used to wash away the excess iron in the ferro-titanium alloy to obtain 1.25t of ferro-titanium alloy product, and its composition was analyzed as follows: Ti: 41.5%, C: 0.12%, Si: 0.5%, P: 0.03%, S : 0.02%, Al: 0.5%, Mn: 0.8%, Cu: 0.05%, and the rest of Fe, fully meet the FeTi-40B standard.

example 2

[0031] Melt 2t of titanium concentrate in an electric furnace at 1650°C. At the end, add 1.2t of sodium carbonate to the furnace and feed 200Nm 3 / min Oxygen stirring for 10 minutes, insert the graphite anode and connect the molten iron cathode at the bottom, carry out electrolysis at a constant voltage of 3.2V for 2 hours, and discharge the hot molten iron and liquid titanium-iron alloy in argon protective atmosphere for cooling, and finally use concentration 1.10t of ferro-titanium alloy product was obtained by washing away excess iron in the ferro-titanium alloy with 2% dilute hydrochloric acid, and its composition was analyzed as follows: Ti: 43.5%, C: 0.08%, Si: 0.5%, P: 0.03%, S: 0.02% , Al: 0.5%, Mn: 0.8%, Cu: 0.05%, and the rest of Fe fully meet the FeTi-40A standard.

example 3

[0033] Smelt 2t of titanium concentrate in an electric furnace at 1600°C. At the end, after removing 400kg of molten iron, add 1.15t of potassium carbonate to the furnace and feed 250Nm 3 / min Oxygen stirring for 10 minutes, inserting the graphite anode and connecting the molten iron cathode at the bottom, carrying out electrolysis at a constant voltage of 3V for 2 hours, under the argon protective atmosphere, discharging the hot molten iron and liquid titanium-iron alloy for cooling, and finally adopting a concentration of 2% dilute hydrochloric acid washes off the excess iron in the ferro-titanium alloy to obtain 750 kg of ferro-titanium alloy product, and its composition is analyzed as follows: Ti: 72.5%, C: 0.12%, Si: 0.5%, P: 0.03%, S: 0.02%, Al : 0.5%, Mn: 0.8%, Cu: 0.05%, and the rest of iron fully meet the FeTi-70B standard.

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Abstract

The invention relates to a method for preparing ferro-titanium. The method comprises the following steps: smelting titanium slag of ilmenite concentrate in an electric furnace, after smelting of the titanium slag is finished, adding at least one kind of alkali carbonate in the electric furnace, leading in air or oxygen gas, stirring to enable titanic oxide in the titanium slag to be converted into titanate, using graphite as the positive pole and molten iron at the bottom of the electric furnace as the negative pole to conduct electrolysis, generating metallic titanium, enabling the metallic titanium to enter molten iron to form liquid-phase ferro-titanium, discharging the molten iron and the liquid-phase ferro-titanium to be cooled under protection of inert gas, and obtaining the ferro-titanium. The ferro-titanium is obtained through the method for preparing the ferro-titanium. A certain amount of the at least one kind of alkali carbonate is added in a molten body after smelting of the titanium slag is finished, the oxygen gas is led in to enable the titanic oxide to be converted into the titanate, the graphite is used as the positive pole, the molten iron is used as the negative pole, and then electrolysis is carried out to prepare the ferro-titanium. The method has the advantage of being simple in operation, and the production cost of the ferro-titanium can be effectively reduced.

Description

technical field [0001] The invention relates to the technical field of titanium smelting, and more specifically, relates to a method for preparing ferro-titanium alloy. Background technique [0002] Titanium and titanium alloys have a series of advantages such as light specific gravity, high specific strength and good corrosion resistance, and are widely used in aviation, aerospace, ships, military industry, metallurgy, chemical industry, machinery, electric power, seawater desalination, transportation, light industry , environmental protection, medical equipment and other fields. As a deoxidizer, degasser, alloy additive and electrode coating, etc., titanium-iron alloy has a much higher deoxidation capacity than silicon and manganese in steelmaking and other processes, and can reduce ingot segregation, improve ingot quality, and increase yield. At the same time, it can increase the strength, corrosion resistance and stability of steel, and is widely used in stainless steel...

Claims

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Application Information

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IPC IPC(8): C22C14/00C22C38/14C22C38/16C25C3/36
Inventor 朱福兴穆天柱穆宏波闫蓓蕾彭卫星
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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