Excel & Himelt
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Innovating tomorrow’s solutions . . . today EXCEL and HIMELT crucibles DESCRIPTION EXCEL and HIMELT are high quality carbon-bonded silicon carbide crucibles manufactured using the latest rollerforming techniques and are designed to cater for a range of non-ferrous melting applications. APPLICATIONS EXCEL: Intended for aluminium melting in oil-fired furnaces, melting copper-based alloys in gas and oil-fired furnaces, melting precious metals and non-ferrous alloys in low to medium frequency induction furnaces. HIMELT: Provides enhanced performance in those applications where more arduous service conditions exist. TYPICAL METAL CASTING TEMPERATURE EXCEL: 850—1250ºC HIMELT: 1000—1400ºC PERFORMANCE CHARACTERISTICS • • • • • Fast melting speed through high consistent thermal conductivity. Excellent thermal shock resistance. High resistance to oxidation. Good erosion resistance. Good resistance to corrosive attack by chemical treatment agents. IDENTIFICATION EXCEL crucibles are coloured dark red and utilise the code X. e.g. AX800. HIMELT crucibles are bright red and utilise the code HM e.g. AHM800. PATTERN RANGE EXCEL and HIMELT crucibles are available in a comprehensive range of shapes and sizes to suit most end user requirements. Custom sizes can be supplied by special request. Heavy wall (HW) versions can be supplied for increased life in arduous applications and a selection of fixed pouring spouts with optimised profiles is offered where required. EXCEL and HIMELT crucibles can be supplied with Morganite’s unique PD coating system, which can assist with metal cleanliness and prevention of dross adhesion. QUALITY EXCEL and HIMELT crucibles are manufactured from premium grade raw materials under an ISO 9001:2008 quality management system. MorganMMS is a business within the MEM Division of The Morgan Crucible Company plc. PREHEATING / FIRST USE FUEL-FIRED FURNACES: Crucibles should be pre-heated empty until they reach a uniform bright red colour (circa 900°C) in order to pre-condition the glaze. The pre-heating time will depend on the size of the crucible. In the case of large capacity crucibles and furnaces with high output burners the rate of temperature rise should be controlled in the initial stages to minimise thermal stress. The typical time taken from ambient to red heat is up to 1 hour. Avoid direct flame impingement on the crucible surface. INDUCTION FURNACES: The heat-up procedure is dependant on furnace frequency, coil dimensions, and the resistivity of the metal being melted. It is recommended where possible to preheat the crucible empty. The power input rate should initially be limited until the crucible becomes bright red over its entire surface. The time taken to pre-heat will depend on the size of the crucible, but is usually in the range 20 – 40 minutes. Once one third of the crucible is full of molten metal the power can be increased to a higher level. Silicon carbide crucibles absorb proportionally high levels of power from the induction field. Care should be taken not to overheat the crucible. The actual maximum power setting should be assessed from experience and will be dependant on the capacity of the crucible. The appearance of the inside wall of the crucible should be monitored for signs of over-heating and the power reduced once the full charge is molten. CHARGING As soon as the crucible has been pre-heated as specified, charge and melt immediately. Charge light scrap and returns first in order to form a cushion for heavier material. Use tongs to charge ingots and place large pieces and ingots vertically allowing space for expansion. Only add flux once the metal is molten and use the minimum quantity required to obtain good metal quality.

Crucibles for Lift Out and Bale Out Furnaces EXCEL/HIMELT A SHAPES (AX/AHM) Brimful capacity (litres) Brimful capacity (litres) EXCEL/HIMELT C SHAPES (CX/CHM) All dimensions are subject to normal manufacturing tolerances. MorganMMS reserves the right to change specifications at any time. Not responsible for any typographic errors.

Cylindrical Crucibles for Induction Furnaces EXCEL/HIMELT CYLINDERS (EX/EHM) TOD (mm) Brimful capacity (litres) EXCEL/HIMELT SPOUTED CYLINDERS (TEX/TEHM) TOD (mm) Brimful capacity (litres) Bilge Crucibles for Lift-Out Furnaces EXCEL/HIMELT F-SHAPES (FX/FHM) TOD (mm) Brimful capacity (litres) All dimensions are subject to normal manufacturing tolerances. MorganMMS reserves the right to change specifications at any time. Not responsible for any typographic errors.

Crucibles for Bale Out Furnaces EXCEL/HIMELT BASINS (BX/BHM) TOD (mm) Brimful capacity (litres) All dimensions are subject to normal manufacturing tolerances. MorganMMS reserves the right to change specifications at any time. Not responsible for any typographic errors.

EXCEL/HIMELT BOWLS (BX/BHM) TOD (mm) Brimful capacity (litres) Aluminium and brass capacity is calculated as follows: • A-Shapes - 90% of brimful. • Basins and Bowls - With a freeboard of 75mm. • Spouted Basins - With a freeboard of 75mm measured from the bottom of the spout. • Cylinders - 70% of brimful. Base recess standard dimensions where fitted are 79mm dia. x depth 11mm. All dimensions are subject to normal manufacturing tolerances. Pyrometer pocket and hole in wall configurations are available to facilitate measurement of metal temperature. Alternative sizes to those listed can be...

Spouted Basins for Tilting Furnaces EXCEL/HIMELT A-SHAPES (TPX/TPHM) TOD (mm) Brimful capacity (litres) Spouted Crucibles for Tilting Furnaces EXCEL/HIMELT SPOUTED (TPX/TPHM) TOD (mm) Brimful capacity (litres) All dimensions are subject to normal manufacturing tolerances. MorganMMS reserves the right to change specifications at any time. Not responsible for any typographic errors.

EXCEL/HIMELT POUR OVER TOP (TPX/TPHM) TOD (mm) Brimful capacity (litres) Brimful capacity (litres) EXCEL/HIMELT TUBE POUR (TPX/TPHM) TOD (mm) All dimensions are subject to normal manufacturing tolerances. MorganMMS reserves the right to change specifications at any time. Not responsible for any typographic errors.