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Electroslag arc-starting smelting method by multiple granular reducing slag by electroslag furnace

A smelting method and electroslag furnace technology are applied in the field of reducing slag and liquid slag arc smelting process to achieve the effects of reducing investment, improving the quality and yield of steel ingots, and protecting water tanks

Active Publication Date: 2014-03-12
张家港市欧微自动化研发有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a new arc-starting smelting process of electroslag furnace multi-component granular reduced slag, which mainly solves the technical problems of simplifying the arc-starting process and reducing costs

Method used

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  • Electroslag arc-starting smelting method by multiple granular reducing slag by electroslag furnace

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Experimental program
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Embodiment Construction

[0015] 1. Electroslag furnace preparation:

[0016] like figure 1 As shown, a sealed water tank 3 is placed on the trolley 4, and circulating cooling water is introduced into the water tank 3 to cool the molten slag in the crystallizer 2.

[0017] A crystallizer 2 is placed above the water tank 3, and an annular asbestos gasket 8 is placed between the water tank 3 and the crystallizer 2.

[0018] Prepare a set of DC power supply 6 with adjustable voltage, fix one of its two output ends on the metal self-consumable electrode 1 with the electrode chuck 7 , and fix the other end on the crystallizer 2 .

[0019] 2. Prepare dry multi-component mixed particles:

[0020] Weigh CaF according to the weight percentage ratio of 48%, 22%, 20%, 0.8%, 3%, 5% and 0.15% respectively 2 、Al 2 o 3 , CaO, SiO 2 、TiO 2 , MgO and FeO, after being fully mixed, set aside.

[0021] Three, smelting process steps:

[0022] 1. Place an arcing backing plate 9 on the inner bottom of the cryst...

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Abstract

An electroslag arc-starting smelting method by multiple granular reducing slag by an electroslag furnace relates to an electroslag furnace smelting process. Before the smelting, an arcing plate is arranged in an inner bottom of a crystallizer; and conductive blocks made of graphite powder are placed between the arcing plate and an electrode; and after the arc-starting, multiple mixed particles are slowly added to the crystallizer and melt into liquid slag, which is subjected to remelting directly. The multiple mixed particles are composed of CaF2, Al2O3, CaO, SiO2, TiO2, MgO and FeO. The invention can meet smelting requirements of electroslag remelting molten slag arc-starting; and the electroslag ingot smelt by the invention can be directly used for forging, without sawing off a part on the bottom; and a yield is increased by more than 5% compared to a previous traditional process.

Description

technical field [0001] The invention relates to an electroslag furnace smelting process, in particular to a reduced slag liquid slag arc-starting smelting process. Background technique [0002] There are three conventional arcing processes for electroslag furnaces. One is dry powder arcing, which uses metal electrodes that need to be remelted to melt slag directly, but the bottom of the steel ingot is prone to defects such as pores; the other is liquid slag arcing. The powdery slag is smelted into liquid slag, and then the liquid slag is injected into the crystallizer for electroslag remelting and refining. The third is to use graphite electrodes to smelt powder slag directly into liquid slag in the crystallizer, then withdraw graphite electrodes and insert metal self-consumable electrodes for remelting and smelting. This technology requires double-station work and additional investment , increasing the production cost of the enterprise. Contents of the invention [0003...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B9/18
Inventor 计永荗钱余海卞志鹏
Owner 张家港市欧微自动化研发有限公司
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