Electroslag remelting solid slag arc striking agent and arcing method thereof

Abstract

The invention discloses an electroslag remelting solid slag arc striking agent and an arcing method thereof. The electroslag remelting solid slag arc striking agent consists of the following components in percentages by mass: 3-5% of pre-melted slag, 0.3-0.5% of aluminum particles and the balance of scrap iron. The scrap iron is used as the main raw material of the solid slag arc striking agent, the scrap iron which is machining waste is recycled, the cost is low, secondary pollution does not exist, and the waste is reused; and moreover, resources are saved, the cost is greatly saved, and possibility of environmental pollution is eliminated. The method has the characteristics of simplicity in operation, stable process, high success rate and the like.

Description

technical field [0001] The invention belongs to the technical field of electroslag remelting, in particular to an electroslag remelting solid slag arc starting agent and an arc starting method thereof. Background technique [0002] Electroslag remelting is a metallurgical method in which steel or alloys smelted by general smelting methods are re-refined in a water-cooled crystallizer. There are two methods of electroslag ignition: solid slag ignition and liquid slag ignition. The solid slag arc ignition agent generally uses CaF 2 +TiO 2 quality pre-frit, which consists of CaF 2 Powder and TiO 2 After the powder is smelted at high temperature, it is cooled and broken into small pieces, and the production cost is as high as 10 yuan / kg. At the same time, it is easy to pollute the environment during smelting and crushing. [0003] TiO 2 The high-quality arc ignition agent itself is fragile and cannot be touched by the consumable electrode when the furnace is installed, and ...

AI Technical Summary

Problems solved by technology

There are two methods of electroslag ignition: solid slag ignition and liquid slag ignition. The solid slag arc ignition agent generally uses CaF 2 +TiO 2 quality pre-frit, which consists of CaF 2 Powder and TiO 2 After the powder is smelted at high temperature, it is cooled and broken into small pieces, and the production cost is as high as 10 yuan / kg. At the same time, it is easy to pollute the environment during smelting and crushing

[0003] TiO 2 The high-quality arc ignition agent itself is fragile and cannot be touched by the consumable electrode when the furnace is installed, and can only be used in the fixed furnace head type electroslag furnace

TiO 2 It is also an unstable oxide, which is easy to cause Ti increase in steel ingots, so this arc ignition agent can only smelt steel types with high titanium content.

Patent application 201610020094.8 discloses an electroslag remelting arc-igniting agent and an arc-igniting method, but the arc-igniting agent needs to be specially made, has high requirements, and the process is complicated

[0004] In addition, in the current electroslag remelting arcing, the manual mode is basically adopted, the arcing voltage generally reaches 40-55V, and the current control is 0-5000A, which is easy to extinguish the arc and impact the copper plate of the bottom water tank, and the current fluctuates greatly