METALLURGY & FOUNDRIES
mixer and granulators for sinter plants
AVA continuous horizontal mixers are used for intensive mixing or granulating of various ores with recycled material, limestone, quartz, and other aggregates. The machine design has been specially adapted and developed specifically for this highly demanding application to achieve greater efficiency and availability than the rotary drum mixers commonly used in the past. A key system feature is the high-quality, easily replaceable system for minimizing drum, shaft, and blade wear.
coal mixers for coking plants
AVA coal mixers have been in reliable operation in several coking plants throughout the world for many years now. Different coal types are homogenized and humidified in AVA mixers and continuous mixers. Subsequently, the mixture is carbonized in the coke oven battery and used as a reducing agent in the blast furnace. This application is characterized by very high throughputs, often up to 1500 t/h. AVA coal mixers are thus designed to be particularly robust and are capable of restarting in filled condition.
Dusts are generated at various points in a steelworks, and they can be recycled using AVA dust conditioners and granulators (pug mills). Examples include foundry dust, sinter dust, electric furnace dust, blast furnace dust, converter dust, furnace burdening dust, and cupola furnace dust. Special compacting process for achieving stable granules enables, for example, sinter dust to be introduced directly back into the steel melt. AVA mixing technology allows for minimizing the amount of water added and delivers perfectly homogeneous end products.
processing of minerals
AVA batch and continuous intensive mixing technology is used for the treatment of various minerals and ores. Examples of these include the treatment of glass raw materials, abrasives, refractories, ceramic raw materials, and masses. The machines used are always individually adapted and optimized for the required task. Depending on the product, high importance is placed on cleaning ability and residual emptying, abrasion protection, or particularly intense or gentle mixing intensity.
For the homogenization of various metal powders (e.g. iron, molybdenum, tantalum, niobium, chrome, aluminum, wolfram, bronze, copper, tin) mostly vertical mixers are used.
Designs with completely extendible agitators are used when best possible cleaning of the machine is important. In addition, choppers / cutting heads integrated for increased mixing efficiency and cutting of agglomarates.
preparation of charges
The vibratory bulk storage feeder type FV allows for the complete raw material charge to be accommodated at this primary stage of the process. The combination of the V - shaped trough and the vibratory angle utilised, provides efficient untangling of interlocking material and ensures an even flow onto downstream equipment. Load cell can be included for batch weighing.
feeding to direct fusion furnace
The vibratory bulk feeder type FV is ideally suited to load charges into direct fusion furnaces. This can include varied feed materials, including interlocking parts. The outlet chute is usually constructed from special heat resistant material. The unit can be mounted on a travelling motorised carriage running on rails, enabling a single feeder to charge mulitle in line furnaces.
stripping & decoring
Custom designed vibratory shakeout grates for the stripping and decoring of casting moulds. These are designed to suit the foundry process requirements, and include 'fixed position' shakeout grates, shakeout grates with a fixed angle of transportation, and finally shakeout grates with a variable angle of transportation.
cooling of castings
Vibratory conveyors incorporating cooling chambers with vertical forced air blowing down onto the product, allows for the cooling of castings during transportation. This can be to suit a fixed conveying rate, or incorporating a SKAKO VIBRATION phase displacement module to allow for the optimum stroke and cooling time to be achieved for differing castings.
Custom designed systems usually commencing with an FV feeder, either with or without a 'Skakoweigh' flow control, allow for interlocking parts and components to be efficiently processed, and directed into a singulated feed pattern. They are fed onto inline vibratory conveyors with the required baffles, chicanes and shaped troughs to ensure the correct orientation.
transportation of sand
Tubular vibratory conveyors allow for the transportation of both hot & ambient temperature sand. Totally enclosed and fully dust proof for pollution free operation. They are available in 6 standard diameters between 160 - 560mm, with lengths up to 10M. They are usually fitted with fixed feed rate unbalanced motor drives.