Utilization method of ferrovanadium slag and premelted refining slag

A technology for premelting and refining slag, which is applied in the field of utilization of premelting refining slag and ferrovanadium smelting slag, and achieves the effects of being beneficial to resource recycling, high-efficiency desulfurization, uniform and stable composition

Active Publication Date: 2014-02-05
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the purposes of the present invention is to provide a method that can effectively utilize ferro-vanadium smelting slag, so as to solve the environmental problems caused by the accumulation of slag

Method used

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  • Utilization method of ferrovanadium slag and premelted refining slag

Examples

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Effect test

example 1

[0033] Ferrovanadium smelting slag and lime as raw materials are weighed in a mass ratio of 30:70, totaling 15 tons.

[0034] The ferrovanadium smelting slag is melted in a high temperature furnace. After it is completely melted, add lime in three batches and stir with nitrogen gas. After stirring evenly, let it stand for 20 minutes. Stop heating the high-temperature furnace, pour the liquid slag into the mold, and the slag obtained after the slag is cooled is the pre-melted refining slag, which is broken into 6mm-12mm particles and packaged. The composition of pre-slag is by weight: Al 2 o 3 21.60%, CaO 70.15%, MgO4.7.55%, SiO 2 0.27%, TFe 0.43%, and the balance is impurities.

example 2

[0036] Ferrovanadium smelting slag and lime as raw materials are weighed in a mass ratio of 41:59, totaling 10t.

[0037] The ferrovanadium smelting slag is melted in a high temperature furnace. After it is completely melted, add lime in three batches and stir with nitrogen gas. After stirring evenly, let it stand for 15 minutes. Stop heating the high-temperature furnace, pour the liquid slag into the mold, and the slag obtained after the slag is cooled is the pre-melted refining slag, which is broken into 6mm-12mm particles and packaged. The composition of pre-slag is by weight: Al 2 o 3 35.78%, CaO 54.98%, MgO9.05%, SiO 2 0.19%, TFe 0.45%, and the balance is impurities.

example 3

[0039] The iron-vanadium smelting slag and lime used as raw materials are weighed in a mass ratio of 60:40, totaling 20 tons.

[0040] The ferrovanadium smelting slag is melted in a high temperature furnace. After it is completely melted, add lime in three batches and stir with nitrogen gas. After stirring evenly, let it stand for 30 minutes. The high-temperature furnace stops heating, and the liquid slag is poured into the mold. After the slag is cooled, the slag obtained is the pre-melted refining slag, which is broken into 6mm-12mm particles and packaged. The composition of pre-slag is by weight: Al 2 o 3 45.51%, CaO 44.03%, MgO10.22%, SiO 2 0.24%, TFe 0.48%, and the balance is impurities.

[0041] In summary, the present invention can effectively utilize the ferro-vanadium smelting slag to prepare pre-melted refining slag, which not only realizes the effective utilization of the ferrovanadium smelting slag as metallurgical waste, but also makes the pre-melted refinin...

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Abstract

The invention provides a utilization method of ferrovanadium slag and premelted refining slag. The utilization method of ferrovanadium slag comprises the following steps of adding ferrovanadium slag to a high-temperature furnace to melt and form a molten bath; adding lime to the molten bath and stirring the bath with inert gases so as to form the slag containing 12Cao.7Al2O3 and / or 3CaO.Al2O3; and cooling the slag to obtain premelted refining slag. The method of the invention can make an effective use of the ferrovanadium slag to obtain premelted refining slag that meets the requirements of metallurgical process like steel making.

Description

technical field [0001] The invention relates to the technical field of resource utilization of solid waste in the metallurgical industry, and more specifically, relates to a method for utilizing ferrovanadium smelting slag and a pre-melted refining slag obtained by the method. Background technique [0002] At present, there are many technologies in the utilization of vanadium, for example, V 2 o 5 Production of ferro-vanadium alloys. Generally, the production methods of vanadium ferroalloy include silicothermal method and aluminothermic method. Among them, when the aluminothermic method is used to prepare the ferro-vanadium alloy, since aluminum particles are added for reduction in the production process, the slag of the ferrovanadium smelting contains a large amount of Al 2 o 3 , resulting in the ferrovanadium smelting slag having a high melting point and being difficult to use. In the prior art, the treatment method for the ferro-vanadium smelting slag is mainly to us...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/076C22B9/10
CPCY02P10/20
Inventor 陈炼李龙陈永戈文荪翁建军王永钢向丽杨森祥杜利华何为
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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