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Method and device for preparing high quality high ferrotitanium alloy based on aluminothermy reduction

A high-quality, ferroalloy technology, applied in the field of alloy preparation, can solve the problems of high production cost, high oxygen content, and high use restrictions of ferro-titanium, and achieve the effects of low production cost, wide source of raw materials, and low energy consumption

Active Publication Date: 2009-06-17
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a method and device for preparing high-quality high-titanium ferroalloy based on liquid thermite reduction. The source of raw materials is less and the production cost is high

Method used

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  • Method and device for preparing high quality high ferrotitanium alloy based on aluminothermy reduction

Examples

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Effect test

Embodiment 1

[0037] A device for preparing high-quality high-titanium ferroalloys based on aluminothermic reduction such as figure 1 As shown, the device includes a feeding device and a smelting device. The feeding device includes a feeding funnel 7 and a feeding pipe 1. The smelting device includes a resistance furnace 4, a magnesia bottom nest 5, a heat-resistant steel pipe 2, and a magnesia lining 3; the feeding device Connect the casing lifting and fixing device 6, and the height of the feeding device can be adjusted through the casing lifting and fixing device 6.

[0038] The inner wall of the heat-resistant steel pipe 2 is sprayed with magnesia lining 3 and fixed in the resistance furnace 4. A refractory material is provided between the heat-resistant steel pipe 2 and the inner wall of the resistance furnace 4, and the bottom of the resistance furnace 4 is provided with a magnesia bottom nest 5 The bottom of the feeding funnel 7 is connected to the feeding pipe 1, and the other end o...

Embodiment 2

[0043] The device that adopts is with embodiment 1.

[0044] The thermite reducing agent is preheated to 700°C and melted into a liquid state to form a molten metal pool. The aluminotherm reducing agent is an Al-based alloy containing 5wt% Mg; a layer of mold slag is covered on the surface of the aluminotherm reducing agent; rutile, iron concentrate Mix with slagging agent and ball mill until the particle size is less than 80 mesh, then preheat to 900°C, and add it into the metal molten pool formed by liquid thermite reducing agent through a feeding device, wherein the slag forming agent is composed of Na 2 O 10%, with CaF 2 20%, the balance is CaO; the feeding amount is rutile: iron concentrate: slagging agent: thermite reducing agent = 1.0: 0.05: 0.18: 0.48 by weight; smelting for 30 minutes after the feeding is completed.

[0045] Inject CaB6 into the metal molten pool in the resistance furnace through the injection pipe in the feeding pipe ， The carrier gas is argon, and...

Embodiment 3

[0047] The device that adopts is with embodiment 1.

[0048] The thermite reducing agent is preheated to 800°C and melted into a liquid state to form a molten metal pool. The aluminotherm reducing agent is an Al-based alloy containing 20wt% Mg and 5wt% Li; a layer of mold slag is covered on the surface of the aluminotherm reducing agent; rutile, Iron concentrate and slagging agent are mixed and ball-milled until the particle size is less than 80 mesh, then preheated to 1200°C, and added to the metal molten pool formed by liquid thermite reducing agent through a feeding device, wherein the slag forming agent is composed of Na 2 O 10%, with CaF 2 20%, the balance is CaO; the feeding amount is rutile: iron concentrate: slagging agent: thermite reducing agent = 1.0: 0.06: 0.20: 0.50 by weight; smelting for 20 minutes after the feeding is completed.

[0049] Inject CaB into the molten metal pool in the resistance furnace through the injection pipe in the feeding pipe 6 , the carr...

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Abstract

A method for preparing high-quality high ferrotitanium based on aluminothermic reduction and a device thereof belong to the technical field of metallurgy. The method comprises the following steps: (1) preheating an aluminothermic reducing agent into a liquid state; and ball milling and baking a titanium-containing substance, an iron-containing substance and a slagging medium, and then continuously adding an obtained mixture to a molten metal bath to perform high-temperature smelting; (2) blowing a particle reducing agent to perform smelting; and (3) cooling, obtaining ingot, removing impurities and obtaining the high-quality high ferrotitanium. The device comprises a charging device and a smelting device; the charging device comprises a charging hopper and a charging tube; and the smelting device comprises a resistance furnace, a magnesite bottom socket, a heat-resistant steel tube, a refractory material and a magnesite lining. The method has the advantages of short process, low production cost, low energy consumption, high product quality and the like, and the device has the advantages of simple structure, convenient operation and good application prospect.

Description

technical field [0001] The invention belongs to the technical field of alloy preparation, and in particular relates to a method and a device for preparing high-quality high-titanium ferroalloy based on aluminothermic reduction. Background technique [0002] The reduction ability of titanium is much better than that of silicon and magnesium, and worse than that of aluminum and zirconium. However, titanium has the advantages of low melting point relative to zirconium products and strong reducibility to slag. Titanium is combined with other elements and used as an alloy in steelmaking. Combining with carbon in stainless steel and heat-resistant steel can improve the welding quality and corrosion resistance of steel, improve the mechanical strength of steel, and can also degas and desulfurize steel. . Ferro-titanium is mainly used as a reducing agent and alloying element in steelmaking. Ferro-titanium is an intermediate alloy of iron and titanium containing 20% ​​to 75% titaniu...

Claims

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Application Information

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IPC IPC(8): C21B15/02
Inventor 张廷安豆志河刘燕牛丽萍赫冀成
Owner NORTHEASTERN UNIV
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