Novel conductive slag for casting and the preparation method thereof

Abstract

The invention relates to novel conductive slag for casting and the preparation method thereof. In order to prepare the conductive slag, graphite powder, carbon steel scraps and sodium silicate are mixed according to the following weight percentage: the mixing ratio of the graphite powder is between 35% and 45%; the mixing ratio of the carbon steel scraps is between 35% and 45%; and the mixing ratio of the sodium silicate is between 10% and 30%. A specially-made mould device is adopted for preparing the conductive slag. The specially-made mould is made from woody material and is of a cuboid shape. Both the length and the width are 120mm and the height is 40mm. The specially-made mould includes two parts between which an inner hole is formed. The diameter the inner hole is 80mm. The two parts of the mould are aligned and fixed by a clamp; the inner hole of the mould is filled with the evenly mixed slag material which is then be tightly pressed by a hammer. The clamp is take down and the mould is opened. The tightly pressed slag material is then baked in a baking furnace. The baking temperature is between 400 degree centigrade and 500 degree centigrade, and the baking time is between 1 hour and 2 hours. The furnace is then opened and the conductive slag is naturally cooled to room temperature. The novel conductive slag for casting and the preparation method thereof overcomes the defects of higher cost of titanium conductive slag and difficult crushing operation in the prior art, and provides novel conductive slag for casting with low cost, easy arc strike and lowered titanium ingot content.

Description

technical field [0001] The invention belongs to the technical field of electroslag metallurgy, in particular to a novel conductive slag for electroslag and a preparation method thereof. Background technique [0002] Conductive slag is the arc ignition agent produced by electroslag remelting. At present, the conductive slag used by most domestic manufacturers is traditional titanium conductive slag. The production of titanium conductive slag is to put titanium dioxide and fluorite in a crystallizer in a certain proportion to melt into liquid slag through graphite electrodes, then cool and solidify, and break it into small pieces when it is used. [0003] With the demand of the market, in recent years, electroslag ingots have strict requirements on titanium content, especially for bearing steel and special products. The use of titanium conductive slag will easily cause the titanium content at the end of electroslag ingot to increase, and the titanium content can increase by 0....

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of high cost and difficult crushing of titanium conductive slag existing in the prior art, and provide a new type of conductive slag for electroslag with low cost, easy arc ignition and reduced titanium content in electroslag ingots and its Preparation

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