Copper with tissue compensators
high specific performance (the highest existing technology autogenous) - 80-100 t / (m2 day).Recent data of PV plant Norilsk shows that the figure may well reach the level of 100 t / (m 2 day) and more.
Low requirements to the size of the charge and humidity (moisture content of the material can be recycled up to 6-8%, does not require grinding of charge).
Low dust removal - no more than 1% by weight of the charge.
fully continuous process that makes it easy to automate it.
Low fuel consumption - no more than 2% in the processing of conventional copper sulphide concentrates in the ordinary matte.When melting of the rich matte at a high enrichment of the blast process can take place completely autogenous mode.
small amount of exhaust gases with high concentrations of sulfur dioxide (30-50%), which reduces the size of the gas-recycling equipment. Fabric expansion joints installed on the ducts and pipelines.The flue gases can be completely redesigned to obtain sulfuric acid, or liquid SO2 elemental sulfur (in the presence of an adequate and effective processing of gases);
relatively low capital and operating costs.
The charge is fed to the unit without prior training (fine grinding, deep drying and so forth.).She goes to the workspace above through the roof of the furnace located on the boot device, equipped Kompenz Elastic Fabric expansion.Once on the surface of the bath, the material is moved into the interior of the melt was stirred vigorously with them under high temperatures becomes liquid.In podfurmennoe zone melting products are divided into matte and slag, which as experience is removed from the oven.Products of combustion and process gases are emitted through the surface of the melt, contributing to the intensive mixing of the molten bath.The gases are removed through a vertical flue, set near the end wall of the slag.
main dimensions and operating parameters of the furnace melting are determined empirically.Its melting chamber formed in a rectangular shaft, the length of which depends on the performance of the unit ranges from 10 to 30 m. The distance between the side walls of the furnace are selected so that the bubble (saturated gas) layer is, as can be more evenly distributed in the cross-sectional planebath.The width of the furnace is on the order of 2 - 3 meters. The total height of the mine is approximately 6 - 6.5 m. Execution furnaces of different lengths produces melting units of different capacities.
foundation and design hearth furnace MF structural elements are similar to those of many furnaces for autogenous smelting.Horn mines spread of refractory (hromomagnezitovogo) brick and has a fabric expansion joints.To protect the masonry in the walls, from the level remote from the hearth of 0.9 - 1 m, and to establish the blast zone of copper embedded caissons of seamless pipes glissazhnyh square outer section.
guard furnace at the site of interaction with the molten slag formed as a belt kesonirovannogo height of about 4 m. It consists of three rows of caissons.The blast zone is located in the bottom row of caissons.The lances are removed from the belt by a distance of 1.5 - 2 m.
caissons made of electrolytic copper in the form of rectangular plates ELATEKSizokeram (600h1300 mm), which is connected in sections fastened common frame.The bottom row of caissons has openings to accommodate the lance.They are set so that the full use of the blast facilitate service garnissazhnoy lining covering the inner surface of the caissons.The desired effect is achieved recessed nozzles (nozzle) lance into the melt of about 50 mm.This reduces the circulation rate of the melt near the wall surface, but results in a sharp deterioration in the working conditions of the lance.
Part lances equipped to supply fuel to the furnace.It is administered through a tube mounted within the lance, so that a gap is formed between them could submit required for the oxidation of sulphides and fuel blowing.Above the upper edge of the caisson zone to set the furnace wall lined with refractory (hromomagnezitovogo) brick.Ends laying flat suspended roof with openings for charging.Close to the end wall to the roof abuts a vertical rectangular flue.
Podfurmennaya bath area through at the bottom of the end walls of the melting chamber flows, is connected to the fabric expansion joints for the release of the fusion products, the entrance to flow to the matte is located at 100 - 150 mm below its level in the melting chamber.As it enters the melt of Laid hromomagnezitovogo brick trap, closed-top spacers false vault.From it the heated trough of the matte is continuously poured into the outer forehearth (mixer).Structure siphon slag is the same as for the matte.The upper edge of its flow is at a distance of 0.9 - 1 m above the tuyeres.To remove the slag from the trap using a heated trough in which he runs a small intermediate clarifier, reminiscent of an external device heated horn blast furnace.Outside the furnace is enclosed in a movable frame rack type.In the area of the blast zone, he serves as the supporting structure is rigidly fastened to the water-cooled caissons.