The aluminum strip continuous casting and rolling line consists of a smelting static furnace group, an on-line aluminum melt purification treatment device, a grain refiner addition machine, a Hazlet continuous casting machine, a pinching (traction) roller, and a single rack. Or multi-frame hot (warm) continuous mill line, edge trimmer, shearer, coiler. As of the end of 2004, there were 14 production lines of this type in the world. The available width of the strip is 300mm-2300mm. It is said that it is designed to produce casting machines with a strip width of 2500mm. The aluminum alloy strips that can be produced on this production line include: 1XXX series alloys, 3XXX series alloys, 5052, 5754, 5349, 5757, 5049 alloys, 6005, 6061, 6063 alloys, 7072 alloys, 8011, 8079 alloys, and the like.
Hazlet Continuous Casting Machine The Hazlet Double Belt Continuous Casting Machine is the former leader of the Hazelett Strip-Casting Corporation based on Clarence W. Clarence. W. Hazelett invented the current owner of the third generation, R. William Hazelett. In 1947, the company started researching and developing double belt casting machines. In 1963, it started production at Algoods, Inc., Tower of Canada in Alcan, Canada, with a 660mm front casting machine.
The main components of the Hazlet Continuous Casting Machine are the feed flow system (the melt tank and the closed melt distributor), the two endless steel belts (upper and lower belts), the side stops on both sides, and the transmission system (tension Roller and stop roller, direct drive structure, water cooling and heat transfer system (water nozzle, sink and heat sink, etc.), frame, etc.
The strip and the edge stopper form a strip mold (mold). The steel belts are placed on the upper and lower frames, the spacing of the frames can be adjusted, and the distance between the edge stops can be adjusted to cast strips of different widths. There are many magnetic support rollers in the frame, which are correspondingly tightened from the inside of the steel belt. The degree of tension can be adjusted to ensure that the steel strip maintains the required flatness deviation.
The 1.2mm thick low carbon steel strip manufactured by Hassledt is shielded and protected by tungsten inert gas. Its casting life is about 115 hours, and its cost is about RMB18/t. Casting sheep must use Al2O3 particles to roughen the steel strip. The depth of roughening depends on the type of cast alloy used, followed by a layer of MatrixTM coating by plasma or flame spraying.
The double belt continuous casting machine has a powerful water cooling system and has strict requirements on the water quality. Its PH = 6-8, should be clean, there must be no oil and other visible suspended material, the water consumption is about 15t/m·min.
The cooling water ejected from the high belt of the nozzle is sprayed along the arc stopper in a tangential direction onto the steel strip, and the steel strip is evenly and rapidly cooled to cool the aluminum melt at a high speed (50° C./s-70° C./s). The cooling water flows through the annular groove on the steel belt support roller and flows into the water collector along the arc-shaped stopper, and returns to the cooling water tank through the drain pipe, so that it is cooled by circulation. In the casting process, the steel strip does not exert pressure on the solidified strip. Before the casting, the steel strip needs to be preheated to about 130° C. During casting, a protective gas is blown between the strip and the melt, which has a high thermal conductivity. . Helium is not expensive and is a by-product of oxygen production companies.
The nozzle is a patented ceramic product and its product name is a StreamTM tape-shaped ceramic nozzle. It consists of a mixture of alumina and silica fibers, and is vacuum compacted. It is a disposable consumable product. The consumption of the nozzle is about RMB 10 yuan in the manufacturing cost. t.
The main consumable materials and spare parts for double belt continuous casting strips are steel strips, MatrixTM spray powders, StreamTM ceramic nozzles, which are supplied by Hazellite and are reasonably priced because of their timeliness and cost (plus freight and customs clearance Fees, tariffs, etc.) The supply of prices to users is one of the main contents of after-sales service.
Prior to casting, the distance between the edge stop and the distance between the steel strips was adjusted according to the width and thickness of the produced strip. When starting the casting, the strip movement degree should be controlled in time to balance the flow of the melt, that is, the melt level should be at the opening of the solidification chamber. Casting speed is 4-10m/min. The gap between the feed nozzle and the steel strip is about 0.25mm, and the leading end of the lead should protrude about 100mm from the leading edge of the nozzle.
The melt cooling rate of the double belt casting method can be as high as 50°C/s-70°C/s, which is much higher than that of semicontinuous casting (DC) 1°C/s-5°C/s, and therefore the crystal structure of the strip Compactness, small dendritic spacing, and high solid solubility of alloying elements improve product performance to some extent. When changing the alloy, if the service life of the nozzle is not yet expired, it can be replaced without using it, but it will continue at the expense of a certain amount of scrap.
After the strip leaves the casting machine, it is sent to a single-stand warm rolling mill or a multi-stand rolling mill row by means of a pinching (traction) roller. The pinch rolls do not apply the rolling force to the strip but have a certain amount of traction.
Single-stand or multi-stand warm rolling mills can be equipped with one or more warm (hot) rolling mills after the double belt type Hazlet casting machine, but they can be 2-rolled, 4-rolled or hybrid-type, to form continuous casting. Rolling production line. Of the 14 continuous casting and rolling lines currently in operation, there are two single-stand four-high mills followed by five, followed by five double-stand four-high mills, and the remaining six each have three four-high mills. Alcan's Saguenay Rolling Mill is mixed, with two rollers at the front and four rollers at the second and third. Since the 1990s, three racks have been built, and the production line that China will build is also three racks.
The structure of the hot rolling mill of the hot rolling mill and the hot strip continuous casting line of the continuous casting and rolling line is exactly the same, and it is no longer a rumor. However, there are differences in the arrangement of the production line and the rolling speed. For example, the rolling speed of the hot and cold rolling mill of the continuous casting and rolling line is less than the rolling speed of the corresponding rolling mill of the hot rolling line of the slab only about 100 m/min; the spacing between the stands of the continuous rolling mill line is less than that of the cast. The hot rolling line of the hot rolling production line is large; the continuous casting and rolling line has 2 coiling machines, which are also located underground.
Hazlet Continuous Casting Machine The Hazlet Double Belt Continuous Casting Machine is the former leader of the Hazelett Strip-Casting Corporation based on Clarence W. Clarence. W. Hazelett invented the current owner of the third generation, R. William Hazelett. In 1947, the company started researching and developing double belt casting machines. In 1963, it started production at Algoods, Inc., Tower of Canada in Alcan, Canada, with a 660mm front casting machine.
The main components of the Hazlet Continuous Casting Machine are the feed flow system (the melt tank and the closed melt distributor), the two endless steel belts (upper and lower belts), the side stops on both sides, and the transmission system (tension Roller and stop roller, direct drive structure, water cooling and heat transfer system (water nozzle, sink and heat sink, etc.), frame, etc.
The strip and the edge stopper form a strip mold (mold). The steel belts are placed on the upper and lower frames, the spacing of the frames can be adjusted, and the distance between the edge stops can be adjusted to cast strips of different widths. There are many magnetic support rollers in the frame, which are correspondingly tightened from the inside of the steel belt. The degree of tension can be adjusted to ensure that the steel strip maintains the required flatness deviation.
The 1.2mm thick low carbon steel strip manufactured by Hassledt is shielded and protected by tungsten inert gas. Its casting life is about 115 hours, and its cost is about RMB18/t. Casting sheep must use Al2O3 particles to roughen the steel strip. The depth of roughening depends on the type of cast alloy used, followed by a layer of MatrixTM coating by plasma or flame spraying.
The double belt continuous casting machine has a powerful water cooling system and has strict requirements on the water quality. Its PH = 6-8, should be clean, there must be no oil and other visible suspended material, the water consumption is about 15t/m·min.
The cooling water ejected from the high belt of the nozzle is sprayed along the arc stopper in a tangential direction onto the steel strip, and the steel strip is evenly and rapidly cooled to cool the aluminum melt at a high speed (50° C./s-70° C./s). The cooling water flows through the annular groove on the steel belt support roller and flows into the water collector along the arc-shaped stopper, and returns to the cooling water tank through the drain pipe, so that it is cooled by circulation. In the casting process, the steel strip does not exert pressure on the solidified strip. Before the casting, the steel strip needs to be preheated to about 130° C. During casting, a protective gas is blown between the strip and the melt, which has a high thermal conductivity. . Helium is not expensive and is a by-product of oxygen production companies.
The nozzle is a patented ceramic product and its product name is a StreamTM tape-shaped ceramic nozzle. It consists of a mixture of alumina and silica fibers, and is vacuum compacted. It is a disposable consumable product. The consumption of the nozzle is about RMB 10 yuan in the manufacturing cost. t.
The main consumable materials and spare parts for double belt continuous casting strips are steel strips, MatrixTM spray powders, StreamTM ceramic nozzles, which are supplied by Hazellite and are reasonably priced because of their timeliness and cost (plus freight and customs clearance Fees, tariffs, etc.) The supply of prices to users is one of the main contents of after-sales service.
Prior to casting, the distance between the edge stop and the distance between the steel strips was adjusted according to the width and thickness of the produced strip. When starting the casting, the strip movement degree should be controlled in time to balance the flow of the melt, that is, the melt level should be at the opening of the solidification chamber. Casting speed is 4-10m/min. The gap between the feed nozzle and the steel strip is about 0.25mm, and the leading end of the lead should protrude about 100mm from the leading edge of the nozzle.
The melt cooling rate of the double belt casting method can be as high as 50°C/s-70°C/s, which is much higher than that of semicontinuous casting (DC) 1°C/s-5°C/s, and therefore the crystal structure of the strip Compactness, small dendritic spacing, and high solid solubility of alloying elements improve product performance to some extent. When changing the alloy, if the service life of the nozzle is not yet expired, it can be replaced without using it, but it will continue at the expense of a certain amount of scrap.
After the strip leaves the casting machine, it is sent to a single-stand warm rolling mill or a multi-stand rolling mill row by means of a pinching (traction) roller. The pinch rolls do not apply the rolling force to the strip but have a certain amount of traction.
Single-stand or multi-stand warm rolling mills can be equipped with one or more warm (hot) rolling mills after the double belt type Hazlet casting machine, but they can be 2-rolled, 4-rolled or hybrid-type, to form continuous casting. Rolling production line. Of the 14 continuous casting and rolling lines currently in operation, there are two single-stand four-high mills followed by five, followed by five double-stand four-high mills, and the remaining six each have three four-high mills. Alcan's Saguenay Rolling Mill is mixed, with two rollers at the front and four rollers at the second and third. Since the 1990s, three racks have been built, and the production line that China will build is also three racks.
The structure of the hot rolling mill of the hot rolling mill and the hot strip continuous casting line of the continuous casting and rolling line is exactly the same, and it is no longer a rumor. However, there are differences in the arrangement of the production line and the rolling speed. For example, the rolling speed of the hot and cold rolling mill of the continuous casting and rolling line is less than the rolling speed of the corresponding rolling mill of the hot rolling line of the slab only about 100 m/min; the spacing between the stands of the continuous rolling mill line is less than that of the cast. The hot rolling line of the hot rolling production line is large; the continuous casting and rolling line has 2 coiling machines, which are also located underground.
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