Iron Oxide Black Disc Dryer

Wet material is continuously fed from the feeder onto the **upper-layer drying disc** of the dryer. The rabble arm, equipped with rabble blades, rotates to continuously turn and spread the material. The material flows across the surface of the drying disc along an exponential spiral path. On the small drying disc, the material is moved to the outer edge and falls onto the outer edge of the large drying disc below. On the large drying disc, the material moves inward and falls through the central discharge port into the next layer of small drying disc below. The small and large drying discs are arranged alternately in an up-and-down configuration, allowing the material to flow continuously through the entire dryer. Heating medium is introduced into the hollow drying discs, which can be in the form of saturated steam, hot water, or thermal oil. The heating medium enters from one end of the drying disc and exits from the other end. The dried material falls from the last layer of drying disc to the bottom of the shell and is finally moved by the rabble blades to the discharge port for removal. Moisture escapes from the material and is discharged through the moisture exhaust port located on the top cover. For the vacuum-type disc dryer, the moisture is extracted through the vacuum pump port on the top cover. The dry material discharged from the bottom can be directly packaged. By adding auxiliary equipment such as fin heaters, solvent recovery condensers, bag filters, dry material back-mixing mechanisms, and induced draft fans, the drying capacity can be enhanced. This allows for the drying of paste-like and heat-sensitive materials, convenient solvent recovery, and the ability to perform pyrolysis and reaction operations.

The package includes: transportation of iron black from the filter press, drying, crushing, and packaging.

Processing capacity per unit hour: 3.47 t/h (dry basis)

Initial water content: 24%

Initial density: 2.309 g/ml

Water content after belt drying: 16%

Water content after tray drying: 0.5%

Density of dried product: 1.37 g/ml

Currently, due to the intermittent operation of the plate and frame filter, the processing time is 9 hours. Three plate and frame filters process a total of 123 tons of wet material (with a moisture content of 24%) per day, equivalent to 53.5 m³.

Product Fineness: 99.6% reaches 400 mesh or above.

Consider the storage and transportation issues from the plate-and-frame filter to the extruder before the drying equipment, so as to achieve automated drying. Please make reasonable considerations. Additionally, incorporate the transportation and storage silo into the overall turnkey work scope.

The recommended drying process is as follows: The material from the plate and frame filter is conveyed into a storage bin. The wet material in the storage bin continuously enters a belt dryer. After preliminary drying, it is sent to a coarse crusher and crushed to approximately 1–2 mm (sufficient for entry into the disc dryer). Subsequently, it enters the disc dryer. The material discharged from the disc dryer is sent to a vortex mill pulverizer, where the crushing fineness reaches 99.6% above 400 mesh. It then proceeds to packaging. During the crushing process, a temperature rise may occur; please consider cooling measures.