Composite Rod-shaped Molybdenum Electrode

The composite rod-shaped molybdenum electrode is a molybdenum rod at the hot end and molybdenum disilicide or stainless steel at the cold end. Cold end of the molybdenum disilicide or stainless steel used in the transition zone, while the hot end of the molybdenum rods are safe through the transition zone. As the

molybdenum disilicide is very brittle, and easy to contaminate the glass and foaming, so in the design process, molybdenum disilicide length should to well be designed so that it will not to touch the glass. In addition, during installation, should be careful to prevent breakage. Composite rod-shaped molybdenum electrode cold end can also use stainless steel, but the stainless steel material must be a special heat-resistant steel and nickel-based alloy has widely used at home and abroad.

As is well known, molten lead glass uses tin dioxide ceramic as the electrode material. However, in recent years, people have tried to connect tin dioxide ceramic materials with molybdenum electrode used for lead glass production, which is a new electrode material. When the lead glass is melted by this kind of composite electrode, cooling water must be supplied to the inside of the electrode so that the hot end can be sufficiently cooled and the molten glass is not contaminated.

Composite electrode can reduce the cost of the electrode assembly. Commonly used composite rod-shaped electrode is made up of molybdenum electrode cap, molybdenum tube, molybdenum tube base, stainless steel water-cooled bracket, electrode bricks and other components. In order to prevent electrode oxidation at the high-temperature, it has been proposed to provide a water cooling tube inside the electrode. The electrode with water cooling tube inside has been put into use in the 70s of last century. To add water in the electrode cooling tube, the composite electrode diameter should be bigger and the current density can be smaller, thereby reducing the erosion of the electrode.

According to the experiment found that the electrode with a cold water pipe in furnace didn’t need to be replaced. Installed in the cold water pipe in electrode, the circulating cooling water will not go through the low temperature side of the stainless steel parts, rather than through the hot side of the molybdenum electrode part.

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