The zinc smelting electric furnace is actually a resistance electric arc furnace. The electric energy supplied by the graphite electrode is converted into heat energy through the material slope and the slag resistance, so that the temperature of the slag is maintained at 1250~1350C, and the furnace gas composed of zinc vapor and C after the electrothermal reaction Enter the condenser to condense the zinc vapor into liquid zinc.
The molten slag is mostly blast furnace slag, and the basicity is 0.75-1.25. The temperature at the top of the spherical furnace is 1200~1300C. Generally, high alumina bricks or heat-resistant castables are used.
High alumina bricks are used for the side walls above the slag line. The erosion and erosion of the slag below the slag line are strong. Chromium can be used for the side walls. (Aluminum) slag brick or chrome-aluminum spinel brick masonry. The bottom of the furnace is flat, and clay bricks, magnesia and brine, and aluminum-chromium (slag) bricks or chromium-aluminum spinel bricks are used for masonry. In view of the strong adaptability to raw materials, short process flow, low investment and fast construction of zinc smelting electric furnaces, environmental pollution is easy to control, so it is suitable for areas with abundant power resources, especially suitable for small and medium-sized zinc smelting electric furnaces with a capacity of 2000 ~ 2500 kV. A Factory selection.
