Method for preparing high-titanium iron by step-by-step metal thermal reduction

A metal heat and high-titanium technology, applied in the field of ferro-titanium alloy, can solve the problems of high oxygen content in the alloy, high Al residual content, high ferro-titanium, and high production costs, and achieve enhanced gold slag separation process, reduced Al residual content, and low production costs Effect

Active Publication Date: 2011-02-09
NORTHEASTERN UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] Aiming at the deficiencies in the current high-iron titanium preparation process, the present invention provides a method for preparing high-iron titanium by step-by-step metallothermal reduction, which solves the problem of high oxygen co

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The method for preparing high-titanium iron by step-by-step metallothermal reduction comprises two steps of one-step aluminothermic reduction smelting and two-step enhanced reduction refining.

[0025] (1) One-step aluminothermic reduction smelting

[0026] According to the mass ratio, the raw material ingredients are as follows: rutile (or high titanium slag): aluminum powder: iron concentrate: slagging agent: KClO 3 =1.0: 0.43: 0.07: 0.20: 0.23, using a vertical smelting furnace with a smelting temperature of 2050°C.

[0027] The amount of reducing agent aluminum in the one-step thermite reduction smelting stage is 87% of the theoretical amount, which ensures that the reducing agent is in a state of insufficient amount in the one-step thermite reduction stage.

[0028] The formula of the slagging agent in the one-step reduction smelting stage is as follows, according to the mass ratio:

[0029] CaF 2 (or Li 2 O or Na 2 O or B 2 o 3 or BaO) 17%, the rest is Ca...

Embodiment 2

[0038] The method for preparing high-titanium iron by step-by-step metallothermal reduction comprises two steps of one-step aluminothermic reduction smelting and two-step enhanced reduction refining.

[0039] (1) One-step aluminothermic reduction smelting

[0040] According to the mass ratio, the raw material ingredients are as follows: rutile (or high titanium slag): aluminum powder: iron concentrate: slagging agent: KClO 3 =1.0: 0.50: 0.10: 0.25: 0.25, using a vertical smelting furnace with a smelting temperature of 2200°C.

[0041] The amount of reducing agent aluminum in the one-step thermite reduction smelting stage is 90% of the theoretical amount, which ensures that the reducing agent is in a state of insufficient amount in the one-step thermite reduction stage.

[0042] The formula of the slagging agent in the one-step reduction smelting stage is as follows, according to the mass ratio:

[0043] CaF 2 17%, Li 2 O (or Na 2 O or B 2 o 3 or BaO) 5%, the rest is C...

Embodiment 3

[0053] The method for preparing high-titanium iron by step-by-step metallothermal reduction comprises two steps of one-step aluminothermic reduction smelting and two-step enhanced reduction refining.

[0054] (1) One-step aluminothermic reduction smelting

[0055] According to the mass ratio, the raw material ingredients are as follows: rutile (or high titanium slag): aluminum powder: iron concentrate: slagging agent: KClO 3 =1.0: 0.37: 0.05: 0.15: 0.20, using a vertical smelting furnace with a smelting temperature of 1900°C.

[0056] The amount of reducing agent aluminum in the one-step thermite reduction smelting stage is 85% of the theoretical amount, which ensures that the reducing agent is in a state of insufficient amount in the one-step thermite reduction stage.

[0057] The slagging agent formula in the one-step reduction smelting stage adopts one of the following schemes, all according to the mass ratio:

[0058] CaF 2 18%, Li 2 O3%, Na 2 O (or B 2 o 3 or BaO...

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Abstract

The invention discloses a method for preparing high-titanium iron by step-by-step metal thermal reduction, which comprises an aluminum thermal reduction smelting step and a reinforced reduction refining step, wherein the raw materials include rutile or high-titanium slag, aluminum powder, iron ore concentrate, slag forming agent and KClO3 in a mass ratio of 1.0: 0.37-0.50: 0.05-0.10: 0.15-0.25: 0.20-0.25, and the smelting temperature is 1,900 to 2,200 DEG C; the reinforced reduction refining time in the second step is 10 to 30 minutes, and after the refining is finished, a high-titanium iron alloy is obtained by cooling, ingot formation and impurity removal; and the composite reducing agent is calcium-magnesium alloy. The method has the advantages of wide raw material source and low production cost; the step-by-step reduction operations are adopted in the method, the reduction smelting of the first step is performed under the condition that the aluminum is insufficient, and the calcium-magnesium alloy composite reducing agent is adopted in the deoxidization refining of the second step, so the Al residue in the high-titanium iron alloy is remarkably reduced, and oxygen is effectively removed; and the transfer of high-temperature melt is realized by casting, and the metal slag separation process is reinforced.

Description

technical field [0001] The invention belongs to the technical field of ferrotitanium alloys, and relates to a method for preparing high ferrotitanium, in particular to a method for preparing ferrotitanium by step-by-step metallothermal reduction. Background technique [0002] Ferro-titanium is an intermediate alloy of iron and titanium with a titanium content of 20% to 75% obtained through reduction or remelting, among which titanium content of 60% to 75% is high-titanium ferroalloy. High-titanium iron with a titanium content of 65% to 75% has been widely used and paid attention to due to its excellent performance such as corrosion resistance, high temperature resistance, wear resistance, and appropriate specific gravity. High ferro-titanium is an important raw material for smelting special steel, structural steel and special alloy. It is an irreplaceable important raw material in aviation, aerospace, and weapon industries. It is also widely used in petroleum, chemical, mach...

Claims

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Application Information

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IPC IPC(8): C21B15/02C22B5/04
Inventor 张廷安豆志河殷志双唐红国牛丽萍刘燕吕国志赫冀成
Owner NORTHEASTERN UNIV
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