1. Technical description:
The porous plug degassing unit is applied in Al- alloy casting process for in-line degassing to achieve the purification treatment of aluminium liquid and improve the purity of aluminium liquid. The unit adopts nitrogen as the purification medium and it is a simple purification equipment to remove hydrogen and metal inclusions from the aluminium melts. This equipment is mounted at bottom, the hydrogen and inclusions in the aluminium liquid will be brought out with floating bubbles produced by porous plug and so that achieves the aim of removing hydrogen and inclusions in aluminium liquid.
2. Equipment components:
2.1 consists of porous plug、ventilation room、gas in-put pipeline、brick cup、steel jacket、 Castables、control system etc.
2.2 Main technical and economic index:
2.2.1 No CI、F pollutants including waster gas and waster residues discharged in the Al- alloys ‘s melting and the amount of slag-making compared to current reduced by more than 30% in the process of melting.
2.2.2 The wave-making stirring technology of porous plugs used can save large investment and daily operating cost in electromagnetic or permanent magnetic stirring equipment; Energy-saving and reduced 1%-5% of comprehensive fuel; The [H] content in molten aluminium decreased by more than 30%, that is 0.32-0.25ml/100gAl,which basically achieves the purging level of the in-furnace fluxes jetting and refining
2.3 Environmental and dynamic conditions:
1、Gas source: Ar or N2 gas source, electrical source; 2、Gas pressure: 0.4-0.6Mpa;
3、Unit consumption: 0.75m3/h each plug