Preparation and use process for electroslag remelting slag

A technology of electroslag remelting and process, applied in the field of electroslag metallurgy, can solve the problems of oxygen increase, high production cost, hydrogenation of steel ingots, etc., achieve the effect of reducing foaming of slag liquid, reducing production cost, and meeting technical requirements

Inactive Publication Date: 2015-04-29
ZHONGYUAN SPECIAL STEEL
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Problems solved by technology

Its raw materials have the advantages of wide sources and low prices, but some industrial raw materials, especially lime, are easy to react with moisture in the air to form hydrogen-containing compounds, which easily cause hydrogenation and oxygenation of steel ingots during electroslag remelting.
Pre-melted refining slag has obvious advantages such as uniform composition, stable performance, no water absorption during storage, less dust, and less environmental pollution. However, the process of pre-melting and crushing slag materials leads to high production costs.

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  • Preparation and use process for electroslag remelting slag

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Embodiment Construction

[0017] A process for the preparation and use of slag for electroslag remelting, pre-melting 1000kg of slag material, the slag material is composed of 200kg of fluorite powder, 400kg of alumina powder and 400kg of lime block, the slag material is baked and dried before slag melting, of which the slag material is After baked at not less than 600°C for 4 hours, keep warm at not less than 200°C and take it out as needed; after baking alumina and lime at not less than 680°C for 4 hours, keep warm at not less than 200°C and take it out immediately after use. Pick up. Place the conductive slag in the center of the spindle guard, and surround it with appropriate amount of fluorite powder to prevent the bottom copper plate from being damaged after the conductive slag is melted. Graphite electrodes are used to start the arc coldly. When adding slag material, add fluorite powder first, and then add some alumina powder (the amount added is about one-third of the total weight of 400kg) aft...

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Abstract

The invention belongs to the technical field of electroslag metallurgy, in particular a preparation and use process for electroslag remelting slag. The process comprises the following steps: firstly preparing fluorite powder, alumina powder and lime blocks in a proportion of (5-30wt%): (30-50wt%): (30-50wt%) into pre-melted slag; and during slagging, firstly adding the fluorite powder, wherein after the fluorite powder is processed, a slag bath is available in a crystallizer; and alternately and slowly adding the alumina powder and lime. The invention provides the preparation and use process for electroslag remelting slag for synthesizing slag charge by using self-smelted pre-melted slag, wherein the process requirement is satisfied and the cost is controlled.

Description

technical field [0001] The invention belongs to the technical field of electroslag metallurgy, in particular to a process for preparing and using slag for electroslag remelting. Background technique [0002] The main component of slag for electroslag remelting is CaF 2 , CaO, MgO, Al 2 o 3 and SiO 2 etc. The industrial raw materials used are fluorite, lime, magnesia, alumina, and quartz sand. Commonly used slag can be divided into two types according to different production processes: one is simple mixed type, and the other is pre-melted type. The simple mixing type is to directly mix various raw materials required for refining slag in proportion. Its raw materials have the advantages of wide sources and low prices, but some industrial raw materials, especially lime, easily react with moisture in the air to form hydrogen-containing compounds, which easily cause hydrogenation and oxygenation of steel ingots during the electroslag remelting process. Pre-melted refining s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B9/18
Inventor 王文洋王晓飞黄开元翟文进
Owner ZHONGYUAN SPECIAL STEEL
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