SNIF® SHEER R-140HB and P-140 Double Nozzle Systems provide a nominal continuous refining rate of 140,000 lbs (63,500 kg) per hour. The system consists of a refining furnace, two (2) SNIF SHEER spinning nozzles, and PLC automated process and furnace heating controls.
R-140HB and P-140 furnaces are divided into two separate and distinct refining chambers, each equipped with a spinning nozzle mounted to the furnace cover. Each chamber is designed to permit optimum process gas bubble saturation throughout the melt to maximize spinning nozzle refining efficiency. An internal baffling system controls the flow of metal, ensuring efficient refining of the molten aluminium as it flows through the refining furnace.
SNIF R-140HB FURNACE
The R-140HB is a specially designed refractory-lined refining furnace. Three furnace walls are constructed of an inner layer of poured-in-place cast refractory and multiple layers of insulating boards. The fourth wall of the furnace contains a graphite heater block with removable electric heating elements. This internal heating system provides continuous temperature control of the metal in the refining furnace.
SNIF P-140HB FURNACE
The P-140HB furnace is identical to the R-140 except that it has a refractory lining cartridge that can be quickly and easily replaced. When the furnace refractory needs to be changed, the old cartridge is simply lifted out and replaced with a new one. The cartridge can be replaced in one or two days, possibly without removing the steel shell from the casting line. The system can be returned to service after a 30-hour pre-heat.
The lining cartridge consists of a dense, hot-face refractory and multiple insulation layers. All refractory is non-wetting and pre-cured. The cartridge is enclosed in foil to prevent moisture absorption while in storage and to minimize contact with the insulation during handling. The cartridge contains a graphite block heating system with removable elements.
SNIF P-140i (IMMERSION HEATED) FURNACE
The P-140i furnace is similar to the P-140HB system except two (2) ceramic immersion heaters are suspended from the cover (1 installed in each chamber) in place of the graphite heater block.
