A method for preparing high-titanium ferroalloy by electric thermite
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A ferroalloy, electro-aluminum heating technology, applied in the direction of improving process efficiency, can solve the problems of waste of mineral resources and large energy consumption, and achieve the effect of saving energy consumption cost, low cost and reducing process links
Active Publication Date: 2019-12-20
NORTHEASTERN UNIV LIAONING
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However, in the separation process of ferro-titanium, although the high-titanium slag prepared by the electric arc furnace can recover iron, it will consume a lot of energy, and the production of titanium dioxide by the sulfuric acid method will consume a large amount of sulfuric acid due to the existence of iron oxides, resulting in a large amount of waste liquid
[0005] Therefore, these smelting methods all cause serious waste of titanium-containing mineral resources
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Embodiment 1
[0036] This embodiment provides a method for preparing high-titanium ferroalloy by electric thermite, which mainly uses low-grade vanadium-titanium magnetite as raw material, together with a certain amount of titanium oxide, slagging agent, and metal aluminum particle reducing agent, in the electric furnace Heating to the beginning of the reaction, during which a reduction reaction occurs, and the valuable components iron and titanium in the raw material ore are extracted to obtain a high-titanium ferroalloy (Ti content ≥ 65%), which realizes the recovery of the valuable components in the raw material ore , and finally produce a high-value-added high-titanium ferroalloy to realize the effective utilization of resources.
[0037] The method for preparing high-titanium ferroalloy in this embodiment comprises steps:
[0038] S1: Pre-drying treatment of low-grade vanadium-titanium magnetite: Put the low-grade vanadium-titanium magnetite in an oven at 105-110°C for 4-5 hours, and t...
Embodiment 2
[0043] This example is based on Example 1, the difference is that in step S2, low-grade vanadium-titanium magnetite, titanium dioxide, calcium oxide, and metal aluminum particles are mixed uniformly according to the mass ratio of 100:485:58:260. In step S3, the heating temperature of the electric furnace is 1700°C. In this embodiment, a high-titanium ferroalloy is obtained, the main components of which are Ti: 69%, Al: 8.9%, and Fe: 13%.
Embodiment 3
[0045] This example is based on Example 1, the difference is that in step S2, low-grade vanadium-titanium magnetite, titanium dioxide, calcium oxide, and metal aluminum powder are mixed uniformly according to the mass ratio of 100:500:45:259. In step S3, the heating temperature of the electric furnace is 1680°C. In this embodiment, a high-titanium ferroalloy is obtained, the main components of which are Ti: 70%, Al: 10.2%, and Fe: 13%.
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Abstract
The invention relates to a method for preparing a high-titanium-iron alloy through an electro-aluminothermic process. The method comprises the following steps: uniformly mixing titanium-iron-containing minerals with titanium dioxide, a slag forming constituent and metal aluminium particles which are taken as a reducing agent; and heating and preserving heat in an electric furnace to perform melting and reducing reaction, separating slag after reaction is ended, thereby obtaining the high-titanium-iron alloy (Ti content being higher than or equal to 65wt%). The high-titanium-iron alloy preparedby taking titanium-iron-containing minerals such as ilmenite and vanadium titano-magnetite as raw materials can be output as high-additional-value products or can be used as raw materials to enter follow-up production. Compared with an external furnace aluminothermic process, the method has the advantages that electric heating production cost is lower, heating agents such as potassium chlorate donot need to use, smoke gas treatment cost is reduced, generation of aluminium oxide is reduced, consumption and waste residue amount of metal aluminium can be reduced, and the slag components are relatively simple and are beneficial for being further utilized as refractory materials and the like.
Description
technical field [0001] The invention belongs to the technical field of comprehensive utilization of mineral resources, and in particular relates to a method for preparing high-titanium ferroalloy by electric thermite. Background technique [0002] As an important metal material, titanium-iron alloy has important applications in industry. In terms of steel, titanium-iron alloys can be used as deoxidizers, degassers and alloying agents to reduce segregation of steel ingots and improve the strength and wear resistance of steel. In addition, in chemical industry and energy, it is also an important electrode coating and hydrogen storage material. At present, the production processes of ferro-titanium alloy mainly include remelting method, carbothermal method and aluminothermic method. [0003] The remelting method mainly uses metal iron and metal titanium as raw materials, high-temperature melting, and recasting to obtain the titanium-iron alloy with the required titanium conte...
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