Used sand must be prepared for mechanical, thermic, or multi-step regeneration by breaking up, screening, drying, and cooling. The KGT Jet Reclaimer is outstandingly suited to mechanical regeneration. The Jet Reclaimer works on the principle of air jet friction.
The process steps are:
• Drying / embrittlement (if necessary)
• Cleaning by grain-against-grain friction.
• Sifting and cooling
The Jet Reclaimer is constructed in such a way that the air which is blown in through the jets in the floor fluidises the sand. At the same time the sand is sifted and cooled. As required, the air is heated to approx. 400 °C, and can be used for drying and for embrittling the binder sheath. In the centrally located blastpipe with the jet positioned under it, and the friction bell sited above the blastpipe, a gyratory air and sand mixture results, in which extensive cleaning of the grains occurs.
The main properties of the Jet Reclaimer are:
• batch-wise operation
• high cleaning efficiency with low grain damage
• no moving parts in the sand, and therefore less wear
• multiple process steps occur in a single compact piece of equipment
Depending on the quantity of sand for regeneration, the Jet-Reclaimer can be supplied in single or multi-pipe models.
Thermic regeneration plants are best used for used sands which are organically bound. We have developed flow bed ovens and flow bed coolers specifically for these applications, and they have proven themselves many times over in foundry operations. Flow bed technology permits optimum heat transfer, protective handling of the sand with optimum regeneration quality, and high sand output. The heat recovery used and the exact temperature control adjusted to the process result in low energy requirements which boost the economic operation of the plant.
The patented control of oven level and sand removal guarantees a consistent handling period and a defined passage of the individual sand grains through the oven.
A further application of the sand regenerator is the recovery of sands bound using furan resin. In combination with our through-feed mixers, we offer complete systems for the creation of furan resin forms, via knock-out grids, and through to regenerators and the re-use of the regenerated sands. Following an exact analysis of the customers situation, the furan sand regenerators are designed and then made to measure. In addition to the effectiveness of the regenerator, its environmental friendliness plays a very significant role. This begins with the economical use of the energy needed, goes on to the high output of sand from the regeneration process, and ends with the reduction of all resulting emission, whether this is dust or noise.
↓Thermic sand regeneration plant