Furnace for dehydration of monosodium phosphate (NaH2PO4) primary solution
For the production of phosphate salt, in other words for the dehydration of a monosodium phosphate (NaH2PO4) primary solution to create the melting product sodium polyphosphate (hexametaphosphate), we have designed a furnace that excels primarily in its resistance to aggressive environments.
It is made of a steel construction with jacketing, a refractory multi-layer lining that resists aggressive combustion products, a gas heating system with a central burner and a melting tub.
This dual-layer tub is made of refractory steel and is water-cooled. This is the biggest and most important advantage of this tub furnace. In other similar furnaces, although the tub is lined, the lining pollutes the smelting product. The furnace we’ve designed resists aggressive fumes both due to its stainless steel tub and due to a furnace lining that uses resistant LAC refractory concrete.
The precise temperature distribution and the temperature of emitted flue gases is monitored by eight thermocouples placed around the furnace in its operating chamber. After heat treatment, the smelting product runs out into a system of cylinders where a fine powder is formed. This powder falls onto a conveyor belt and then travels into the operating area where it is further processed.
Thanks to this design, our tub furnaces have a final product that is of such high quality it can even be used in the food industry. You see, the phosphate salt produced in these furnaces is used as a stabiliser in a variety of foods.