NOUFERROUS METALLURGICAL EQUIPMENT

An Integration of molten metal, water and electricity, the power-frequency coreless electric induction furnace has been widely used in the melting and castingof zinc alloy. The furnace has many strengths, which have facilitated the alloy production: strong melting capability, good chemical quality of the product thanks to the electro-magnetic agitation, high zinc recovery, easy control of furnace temperature, low energy consumption, high operability as it is easy to tilt and rotate, and simple furnace cleaning. The furnace, however, has been plagued by liner leakage, because of issues in liner installation and liner structure. In the industry, a newly lined furnace can only operate for 500-1000 batches before zinc leakage occurs. The leakage burns coil insulations and other auxiliaries, posing great threat to the operator as well. Also as the crucible inside has to be removed to enable relining when a leakage occurs, the costs are high and operation must be interrupted for a rather long period. To address these issues, we have made some improvements on the design of the furnace body reinforcement and insulation areas, and have taken measures during operation accordingly. These efforts have lengthened the liner service life up to 3000 batches, contributing to a more economic and stable operation.