Preparation and use process for electroslag remelting slag

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...

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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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