Premelted refining slag and preparation method thereof

A technology of refining slag and pre-melting type, which is applied in the field of pre-melting refining slag and its preparation, to achieve the effects of resource recycling, good reducibility, and high-efficiency desulfurization

Active Publication Date: 2012-07-11
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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  • Premelted refining slag and preparation method thereof
  • Premelted refining slag and preparation method thereof

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preparation example Construction

[0018] Such as figure 1 As shown, in an exemplary embodiment of the present invention, the preparation method of the pre-melted refining slag comprises the following steps: adding ferrovanadium smelting slag and electric furnace arcing iron into the electric furnace, melting to form a molten pool; adding Aluminum to reduce the vanadium oxides in the ferrovanadium smelting slag; add lime to the molten pool and stir the molten pool with inert gas to form 12CaO·7Al 2 o 3 and / or 3CaO·Al 2 o 3 phase slag; separate the slag and molten metal in the molten pool to obtain pre-melted refining slag and molten metal. Here, the inert gas may be common inert gas such as nitrogen or argon. The iron added to the electric furnace together with the ferro-vanadium smelting slag is to play the role of arc ignition, and the amount of addition can be set according to the actual situation. The purpose of adding aluminum is to reduce the vanadium oxides in the ferro-vanadium smelting slag, there...

example 1

[0031]Ferrovanadium smelting slag, lime and aluminum particles as raw materials are weighed in a mass ratio of 30:69.5:0.5, totaling 15 tons.

[0032] Put the ferro-vanadium smelting slag and 300kg iron nuggets into the electric furnace and melt them. After being completely melted, add aluminum pellets to continue melting. Then add lime in three batches and stir with nitrogen gas. After stirring evenly, let it stand for 10 minutes. After the slag and iron are separated, the slag is first discharged and then the iron is discharged. . The pre-melted refining slag is broken into particles of 6mm to 12mm and packaged. The composition of pre-slag is by weight: Al 2 o 3 21.45%, CaO 70.63%, MgO 7.65%, SiO 2 0.27%, TFe 0.43%, and the balance is impurities. After the metal liquid mold containing vanadium and iron elements is cast into blocks, it is returned to the vanadium-iron alloy smelting process for utilization.

example 2

[0034] Ferrovanadium smelting slag, lime and aluminum particles as raw materials are weighed in a mass ratio of 60:39.5:0.5, totaling 10 tons.

[0035] Put the ferro-vanadium smelting slag and 200kg iron nuggets into the electric furnace and melt them. After being completely melted, add aluminum pellets to continue melting. Then add lime in three batches and stir with nitrogen gas. After stirring evenly, let it stand for 20 minutes. After the slag and iron are separated, the slag is first discharged and then the iron is discharged. . The pre-melted refining slag is broken into particles of 6mm to 12mm 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. After the metal liquid mold containing vanadium and iron elements is cast into blocks, it is returned to the vanadium-iron alloy smelting process for utilization.

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Abstract

The invention provides a premelted refining slag and preparation method thereof. The preparation method comprises the following steps of: adding ferrovanadium slag and arc striking iron to the electric furnace to melt and form a molten bath; adding aluminum to the molten bath to reduce the vanadium oxide in the ferrovanadium slag; 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 separating the slag from the metal liquid in the molten bath to obtain premelted refining slag and metal liquid. 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 pre-melted refining slag and a preparation method thereof. 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 use it as crushed stones for road paving or stac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/04C21C7/076
CPCY02P10/20
Inventor 陈炼李龙陈永戈文荪王永钢向丽杨森祥杜利华翁建军何为
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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