Manufacturing
With multi-plants and fully integrated production capability, CNBM has experienced China’s aluminum industry for over 20 years, and is one of the main investors in Chinese major aluminum mills. The company manufacturers core products such as aluminium foil, coil, sheets, strip, and finished products such as fin stock, embossed sheets,floor tread plates, anodized sheet, aluminium circle etc. The total production capacity is 250,000 tons per year, around 100,000 tons foil/ year and 150,000 tons/ sheet and plate.
CNBM Aluminium factories have continuous casting lines, cold mills, foils mills, cutting, slitting, separating lines, tension levelers, coating lines, oil coating lines, annealing furnaces and other auxiliary equipments. The main production and testing equipments are imported from Japan, Germany, America, and Italy. CNBM applies the most advanced technology and processes in our manufacturing practice and implement the best quality control system to assure customer satisfaction on our products.
Production Process
Continuous Casting
Continuous casting is accomplished in a single unit through roll casting, eliminating intermediate stages of ingot casting, homogenization, cutting, scalping, reheating and hot rolling required in the hot rolling process.
In comparison with hot rolling, roll casting has advantages of lower investment and operating costs; makes it feasible to install small to super sized units for production of soft to medium hard alloys. Continuous casting makes it possible to substantially save energy, and easy to operate and to change the cast strip width according to requirements. It permits the use of high proportion of scrap in furnace charge.
Hot Rolling
The heated slab is usually cooled after casting to room temperature and then re-heated to around 500°C prior to successive passes through a hot rolling mill where it is reduced in thickness to about 4 - 8 mm. The heated slab is hot rolled back and forward several times through the hot reversing mill to achieve a certain thickness prior to roll in the “1+4” Hot Tandem Rolling Line. The finished products are hot rolled coils and plate materials for further process
Cold Rolling
Hot rolled coils are then processed in the Cold Rolling Machine to customers' required Thicknesses and further treated in the annealing furnaces to achieve the required temper / strength. The strip from the hot rolling mill is coiled for transport to the cold mill which might be on the same site or elsewhere. Cold rolling speeds vary but modern mills operate at exit speeds as high as 3000 m per minute and alloys may be cold rolled to thickness of around 0.05 mm.
Cold Rolling
The rolled coil is processed here and cut the length according to the clients’ requirement, and finally make the final sheet which can be offered as further processing raw material, such as ceiling, coating board, container board, decorating board, etc.
Foil Rolling Mill
Aluminium foil is produced by a process of foil rolling and annealing from cold-rolled coils to reach a target thickness under 0.2mm down to 0.006mm (6 micron). In recent years, a greater variety of aluminium foils has been developed to meet diverse market demands of the consumer product market.
Doubling Machine
To meet the requirement of technique of rolling procedure, the coils should be rolled on finish cold mills or foil mills with double sheets, in order to manufacture certain kinds of final products.
Annealing Furnace
Aluminium foil is placed in the Annealing Furnace by means of heat treatment to reach a specific temper and mechanical properties required by customers.
Tension Levellers
In many modern installations concerned with the high volume production, for instance in the canning industry, the very stringent flatness requirements are achieved by combinations of mill control and by the use of tension levellers. Gauge control is achieved in much the same way as flatness, i.e. by continuously measuring outgoing strip thickness and adjusting the roll bite accordingly.
With multi-plants and fully integrated production capability, CNBM has experienced China’s aluminum industry for over 20 years, and is one of the main investors in Chinese major aluminum mills. The company manufacturers core products such as aluminium foil, coil, sheets, strip, and finished products such as fin stock, embossed sheets,floor tread plates, anodized sheet, aluminium circle etc. The total production capacity is 250,000 tons per year, around 100,000 tons foil/ year and 150,000 tons/ sheet and plate.
CNBM Aluminium factories have continuous casting lines, cold mills, foils mills, cutting, slitting, separating lines, tension levelers, coating lines, oil coating lines, annealing furnaces and other auxiliary equipments. The main production and testing equipments are imported from Japan, Germany, America, and Italy. CNBM applies the most advanced technology and processes in our manufacturing practice and implement the best quality control system to assure customer satisfaction on our products.
Continuous casting is accomplished in a single unit through roll casting, eliminating intermediate stages of ingot casting, homogenization, cutting, scalping, reheating and hot rolling required in the hot rolling process.
In comparison with hot rolling, roll casting has advantages of lower investment and operating costs; makes it feasible to install small to super sized units for production of soft to medium hard alloys. Continuous casting makes it possible to substantially save energy, and easy to operate and to change the cast strip width according to requirements. It permits the use of high proportion of scrap in furnace charge.
The heated slab is usually cooled after casting to room temperature and then re-heated to around 500°C prior to successive passes through a hot rolling mill where it is reduced in thickness to about 4 - 8 mm. The heated slab is hot rolled back and forward several times through the hot reversing mill to achieve a certain thickness prior to roll in the “1+4” Hot Tandem Rolling Line. The finished products are hot rolled coils and plate materials for further process
