Our core business in metallurgy business segment is the handling of fine bulky materials. We offer entire solutions for non-ferrous smelters, including copper, nickel, lead and zinc. Material handling includes both the abrasive metal concentrates, fluxing agents, flue dusts and reverts.
Smelters normally feed dry concentrate to the furnace. We provide both mechanical and pneumatic conveying solutions for the concentrate as it needs to be lifted up above the furnace top. Consequently, we also supply air slides through which the feed mix is fed into the furnace.
Both the dense-phase and dilute-phase ELMO-systems of pneumatic conveying may be applied for the concentrate after drying. Alternatively, mechanical conveyors can also be applied, like vertical elevators or inclined drag chain conveyors.
Flue dust handling
There is a number of various flue dusts at a smelter, originating from primary smelting furnace, converter and electric furnace:
- primary smelting furnace dust form the Waste-Heat-Boiler (WHB)
- primary smelting furnace dust from the subsequent electrostatic precipitator (ESP)
- primary smelting furnace dust from the baghouse filter (BHF)
- fine secondary converter dust from the ESP
- ultra-fine dust from the electric furnace
- other secondary dusts from bag house filters.
Due to different formation mechanisms of various flue dusts, their mechanical and chemical characteristics differ quite significantly from each other with respect to particle size distribution, chemical composition and morphology. Therefore, unique pneumatic conveying solutions are needed for each specific dust.
Whenever sintering occurs, the dust needs first to be crushed. For the purpose we offer a wide range of crushers. Pneumatic conveying, both on dense-phase and dilute-phase models is applied with special twists for the fine primary and secondary dusts. Furthermore, also mechanical conveying can be applied, depending on material characteristics, particle size distribution, stickiness, dew-point etc.