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Method for preparing ferrovanadium alloy from titanium tetrachloride refined tailings

A technology of titanium tetrachloride and vanadium iron alloy, applied in the field of metallurgy

Active Publication Date: 2021-06-18
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

[0005] From the above disclosed technologies, the raw materials used for the production of vanadium ferroalloys are still mainly vanadium oxides, and the method of comprehensive utilization of the tailings from the refined titanium tetrachloride is mainly to modify it as a kind of raw material. Raw materials for vanadium extraction, no similar report on the preparation of vanadium-iron alloys using it as raw materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Crushing and grinding titanium tetrachloride refined tailings with V, Ti, Fe, Cl, C, and Si mass fractions of 16.8%, 28.1%, 1.1%, 13.1%, 6.8% and 0.7% respectively to a particle size of ≤100 mesh, Then oxidize and roast at 400°C for 60 minutes to obtain roasted clinker. During the roasting process, the kiln head is continuously fed with air to ensure that the kiln is under negative pressure. The mass fractions of V, Ti, Fe, Cl, C, and Si in the roasted clinker They were 35.1%, 21.0%, 1.4%, 0.05%, 0.1% and 0.9%, respectively.

[0060] Mix roasted clinker, vanadium pentoxide, iron particles, aluminum powder, lime, and potassium perchlorate in a weight ratio of 50:50:9.5:34:9:5, mix them evenly, spread them in the smelting furnace, and use metal Titanium powder is used as the ignition agent to initiate the reaction for self-propagating smelting. After all the materials are melted and a good molten pool is formed, an asbestos insulation cover is quickly added to the upper s...

Embodiment 2

[0063] Crushing and grinding titanium tetrachloride refined tailings with V, Ti, Fe, Cl, C, and Si mass fractions of 16.8%, 28.1%, 1.1%, 13.1%, 6.8% and 0.7% respectively to a particle size of ≤100 mesh, Then oxidize and roast at 400°C for 60 minutes to obtain roasted clinker. During the roasting process, the kiln head is continuously fed with air to ensure negative pressure in the kiln. The mass fractions of V, Ti, Fe, Cl, C, and Si in the roasted clinker They were 35.1%, 21.0%, 1.4%, 0.08%, 0.10% and 0.9%, respectively.

[0064] Mix roasted clinker, vanadium pentoxide, iron particles, aluminum powder, and lime according to the weight ratio of 50:50:9.5:34:9, mix them evenly, lay them in the smelting furnace, and use graphite electrodes to feed electricity and smelting The contact-induced reaction of the mixture is carried out for electroluminothermic reaction. After all the materials are melted and a good molten pool is formed, the electricity is continuously applied until t...

Embodiment 3

[0067] Crushing and grinding titanium tetrachloride refined tailings with V, Ti, Fe, Cl, C, and Si mass fractions of 25.7%, 16.3%, 0.9%, 15.2%, 5.6% and 0.4% respectively to a particle size of ≤100 mesh, Then oxidize and roast at 500°C for 60 minutes to obtain roasted clinker. During the roasting process, the kiln head is continuously fed with air to ensure negative pressure in the kiln. The mass fractions of V, Ti, Fe, Cl, C, and Si in the roasted clinker They were 32.1%, 20.4%, 1.1%, 0.05%, 0.05% and 0.5%, respectively.

[0068] Mix the roasted clinker, vanadium pentoxide, iron particles, aluminum powder, and lime according to the weight ratio of 50:50:10.5:41:10, mix them evenly and place them in the smelting furnace, and use graphite electrodes to feed electricity and connect with the smelting furnace. The contact-induced reaction of the mixture is carried out for electroluminothermic reaction. After all the materials are melted and a good molten pool is formed, the electr...

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Abstract

The invention relates to the technical field of metallurgy, and discloses a method for preparing a ferrovanadium alloy from titanium tetrachloride refined tailings. The method comprises the following steps of (1) crushing and levigating the titanium tetrachloride refined tailings, and oxidizing and roasting in a rotary kiln to obtain vanadium-containing roasted clinker; (2) uniformly mixing the vanadium-containing roasted clinker and vanadium oxide with iron particles, a reducing agent, a slag former and a heat generating agent to obtain a ferrovanadium smelting mixture, and then uniformly distributing the ferrovanadium smelting mixture in a smelting furnace for smelting; and (3) after finishing smelting and naturally cooling a furnace body, slag and gold, disassembling the furnace body, separating the slag and gold, and obtaining a ferrovanadium alloy cake and the smelting slag. According to the method, the titanium tetrachloride refined tailings are roasted to obtain the vanadium-containing roasted clinker, the vanadium-containing roasted clinker and vanadium oxide serve as mixed vanadium-containing raw materials, smelting is conducted according to the electrothermal reduction technology and the self-propagating smelting technology, a qualified ferrovanadium alloy product can be prepared, the vanadium smelting yield is high, and the generated smelting slag can be used as a titanium extraction raw material for further resource utilization.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method for preparing vanadium-iron alloy from titanium tetrachloride refined tailings. Background technique [0002] Vanadium-iron alloys are widely used in vanadium-containing microalloy steels. It has a dual strengthening mechanism of fine-grain strengthening and precipitation strengthening, thereby reducing overheating sensitivity and improving the strength and wear resistance of steel. It is widely used in construction, aerospace, roads and bridges and other industries. The production of vanadium-iron alloy mainly includes thermal reduction methods such as aluminothermic method, silicothermal method and carbothermal method, among which aluminothermic reduction method is the most widely used. At present, ferro-vanadium production enterprises mainly smelt vanadium-containing raw materials with V 2 o 5 Mainly, with the development of new technologies and new processes, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B34/22C22B7/00C22B4/06C22B1/02C22C1/02C22C27/02
CPCC22B34/22C22B7/001C22B1/02C22B4/06C22C1/02C22C27/025Y02P10/20
Inventor 余彬叶明峰黄云景涵
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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