Introduction

In the melting and casting process of aluminum and its alloys, the molten aluminum contains a certain amount of hydrogen and slag inclusions, will increase porosity and decrease mechanical strength of aluminum, these defects will affect further process property. Restricts the application and use of aluminum alloy. 

Equipment Function

In the melting and casting process of aluminum and its alloys, the molten aluminum contains a certain amount of hydrogen and slag inclusions, will increase porosity and decrease mechanical strength of aluminum, these defects will affect further process property. Restricts the application and use of aluminum alloy. 

Degassing is the most effective way to remove hydrogen from molten aluminum . In industry, in-line degassing is usually used. Through the method by rotary blowing, a quantitative degassing gas (argon or nitrogen) is injected into a closed box and broken into micro bubbles, so that the hydrogen can be risen by attaching to the micro bubbles,when rise to the surface of the aluminum liquid,degassing effect can be reached.
Filtration is the most effective method to remove non-metallic inclusions in the molten aluminum. In the industry, non-metallic inclusions in the molten aluminum are generally removed by plate filtration, or combined with deep bed filtration (or tubular filtration). The filter layer is a porous medium and can be accurately calculated to ensure that the filter layer has sufficient thickness to retain inclusions in the area of the filter layer.

The integrated degassing and filtering machine is a good combination of degassing and filtering. The box can be designed with zero residual aluminum or set with a certain volume. The liquid outlet is added with a flow control plug to stably control the outflow of aluminum liquid.

Equipment Features

RS-DF series integrated degassing and filtering is the latest development product by Sino-Foundry Refractory(Jiangsu) Co.,Ltd., lead inert gas into the bottom of the box  through one (or more) rotating rotor mechanisms. the inert gas is sheared into micro bubbles by a high-speed rotating impeller and uniformly dispersed in the cavity melt. through bubble flotation, good refining effects of degassing, slag removal and alkali metal removal are achieved.

Degassing gas is usually argon or nitrogen, considering nitrogen refining has the formation of nitride impurities,argon is preferred.

Features of RS-DF series integrated degassing and filtering:

● In-line refining degassing efficiency is high and stable,it is usually more than 55%;

● The inner lining of the box is prefabricated with high strength non-aluminized castable silicon carbide material, do not pollute the aluminum liquid and have a long service life;

● The outer lining of the box body is added anti-aluminum liquid leakage insulation materials to prevent aluminum liquid from penetrating into the insulation layer when cracks occur in the lining; The insulation layer of the box uses high-quality calcium silicate thermal insulation board and nano insulation board;    

● The most suitable degassing graphite impeller can be designed according to customer process requirements to achieve the best degassing effect;

● The upper cover insulation material uses high-strength non-aluminized castable as a whole pouring and firing molding; the upper cover insulation layer uses high-quality calcium silicate insulation board and nano insulation board;

● The motor lifting and rotating function of the upper cover can be stable in operation, which is convenient for slag removal and equipment spare parts maintenance;

● Multiple alarm and fault detection function can help users find and solve problems in the first time;

● High degree of automation, safe and reliable;

● Multiple modes of sound and light alarm.

Technical Parameters