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Continuous casting continuous casting furnace casting and mixing can be divided into the outer cast in two ways. All using a continuous casting machine. Casting furnace is mixed into the liquid aluminum holding furnace, by the mixing casting furnace, mainly used for the production of aluminum ingots for remelting and casting alloys. External cast is cast from the casting machine to lift the package directly, mainly in the production of foundry equipment can not meet, or incoming poor quality can not be directly into the furnace of the case. Since no external heat source, it requires carrying bag has a certain temperature, generally in summer in 690 ~ 740 ℃, winter in 700 ~ 760 ℃, in order to ensure a good appearance ingots. Mixed casting furnace, the first to go through the ingredients, then pour into the hybrid furnace, stir, then add the flux for refining. Casting alloy ingot must be clarified for more than 30min after clarification slag can be cast. When casting, mixing furnace is aligned with the eye of casting machines second, third mold, which can ensure a certain degree of flexibility to change streams and changeover time. Eye furnace and caster coupled with a flow channel, chute shorter is better, this can reduce the oxidation of aluminum to avoid vortex and splash, casting machine disabled 48h or more, before restarting, to mold preheat 4h. Aluminum liquid flow into the mold through the flow cell, with a shovel aluminum surface oxide film is removed, called slag. Flow over a mold, it will move to the next chute mold for the continuous casting machine is moving forward. Mold in turn forward, gradually cooled liquid aluminum reaches the middle of the casting machine has solidified when molten aluminum into ingots, melting marked by the printer number. When the aluminum ingot casting machine reaches the top, has been completely solidified into ingots, then flip the mold, Aluminum Mould out, then ingots landed small automatic car, automatic stacking the stackers, balers become finished aluminum ingot. Casting machine from the water cooling, but you must start before the water after casting machine turn full circle. 8-10t consumption per ton of aluminum was about water, summer hair needs to be attached to the surface cooling. Belonging to a flat die casting ingot, the solidification of liquid aluminum is bottom-up direction, and the upper middle of the final solidification, leaving a gutter-collapsed. Ingots various parts of the coagulation time and conditions vary, so its chemical composition will be different, but the whole is standard. Remelting ingots common defects are: ① pores. Mainly due to the casting temperature, more gas in liquid aluminum, aluminum ingot surface pores (pinholes) and more, the surface dark, severe thermal cracking. ② slag. Mainly due to one hit residue without a net, causing the surface slag; second molten aluminum temperature is too low, causing internal slag. ③ ripple and flash. Mainly the operation is not fine, ingots do too much, or the resulting casting machine is not running smoothly. ④ cracks. Cold cracking mainly casting temperature is too low, resulting in less dense crystalline ingots, resulting in loose even crack. High temperature thermal cracking caused by the casting. ⑤ segregation. When the cast alloy is mainly caused by uneven mixing. Vertical semi-continuous casting vertical semi-continuous casting is mainly used for aluminum ingot, sheet ingot and processing profiles for the alloy used in the production of various modifications. After ingredients into liquid aluminum holding furnace, because of the special requirements of wire, to be added prior to casting titanium intermediate closing disc prolapse Al-B liquid aluminum, vanadium (wire bar); sheet ingot need to join Al-Ti - B alloy (Ti5% B1%) were thinning. Meticulous organization of the surface. High magnesium alloy plus 2 # refining agent, the amount of 5%, stir, standing 30min stripped of scum, you can cast. Before casting the first casting machine chassis rises, with compressed air to blow water net chassis. Chassis and then rise into the mold, apply a layer of mold wall to oil, put some water jacket cooling water, dried preheated dispensing tray, automatic adjustment plug and launder away, so that each dispensing tray a port located in the center of the mold. When casting began, hand to suppress the automatic adjustment of plug, blocking the flow nozzle, mixing furnace cut eye, so that the inflow of molten aluminum through the chute dispensing tray until liquid aluminum reaches 2/5 in dispensing tray, automatic release adjusting plug, aluminum flow into the mold, the molten aluminum that is cooling in the chassis. When the liquid reaches 30mm high aluminum in the mold to drop the chassis, and began to send cooling water control automatically adjust stopper balanced inflow of molten aluminum mold, maintaining the aluminum liquid crystal within the same height. Scum on the surface of the liquid aluminum oxide film to be promptly removed. When the ingot length of about 6m, blocked stove eye, removed the dispensing tray until after all solidification of molten aluminum to stop water supply, the water jacket is removed, the cast ingot out with a monorail, in accordance with the requirements of size sawing amputated, and then prepare for the next casting. When casting, the mixing of molten aluminum furnace temperature was maintained at 690 ~ 7l0 ℃, the temperature distribution of molten aluminum plate is maintained at 685-690 ℃, the casting speed is 190 ~ 21Omm / min, cooling water is 0.147 ~ 0.196MPa. Casting speed and square cross-section of a wire bar proportional: VD = K where V is the casting speed, mm / min or m / h; D for the ingot cross-section side length, mm or m; K is a constant value, m2 / h , usually 1.2 to 1.5. Vertical semi-continuous casting is sequential crystallization, after casting molten aluminum into the hole, the start and the inner wall of the crystallization of mold on the chassis, the center and the edge because of the different cooling conditions, thus forming an intermediate low crystallinity, the surrounding high form. Chassis decline at constant speed. While the upper part of the continuous injection of molten aluminum, so that the liquid between the solid aluminum and aluminum have a semi-solid region. Since aluminum liquid condensing to shrink, with mold wall with a layer of oil, along with chassis decline solidified aluminum mold exit, there is a circle in the lower part of the mold cooling water hole, the cooling water may be sprayed onto prolapse ingot surface for secondary cooling, until the entire ingot casting lines last. Crystalline order can be established relatively satisfactory solidification conditions, the crystalline grain size, mechanical properties and electrical conductivity are more favorable. No more than slabs of its kind on the difference in height direction on the mechanical properties, segregation is also smaller, faster cooling, you can get a very fine crystal structure. Aluminum ingot surface should be smooth, no slag, cracks, holes and other surface crack length of not more than 1.5mm, slag and wrinkles edge crack depth from the surface allowed more than 2mm, section should not have cracks, porosity and slag, The slag is less than lmm no more than five. Aluminum ingot main deficiencies are: ① cracks. The reason is an aluminum liquid temperature is too high, too fast, increasing the residual stress; liquid aluminum silicon greater than 0.8%, the resulting molten aluminum-silicon with, and then generate some free silicon, increasing the thermal cracking of metal: or lack of cooling water. In the crystal surface roughness or no use of lubricants, the surface and the corner of the ingot also cracks. ② slag. Aluminum ingot surface slag is due to the fluctuation of liquid aluminum, aluminum surface oxide film rupture, into the side of the ingot surface scum caused. Sometimes lubricants also may carry some of the slag. Internal slag is too low because the temperature of molten aluminum, aluminum surface caused by frequent changes in viscosity, slag can not be lifted or when casting. ③ cold shut. Mainly due to the formation of cold shuts the mold aluminum liquid level fluctuation is too large, the casting temperature is low, too slow or ingot casting machine vibration, drop ④ porosity caused by uneven. Here, the pore diameter of less than 1mm means small pores. The causes of the casting temperature is too high, excessive condensation, liquid aluminum contained in the gas can not escape in time, after solidification gathered into small bubbles remain in ingot form pores. ⑤ rough surface. Because the mold wall is not smooth, poor lubrication, severe form of the crystal surface aluminum tumor. Or due to the Fe-Si ratio is too large, uneven cooling segregation generated. ⑥ drain aluminum and Again. Mainly operational issues also caused serious tumor crystal. 8 edit material consumption cost is the sum of the cost of production companies to produce a certain amount of a commodity that expenditure of material and labor remuneration, namely commodity value constitute part of the C + V. Let's analyze the cost of ingot material consumption: aluminum smelters home ingot production of material consumed mainly in three ways: 1, alumina; 2, electricity costs; 3, burnt anodes (anode carbon block). Another fluoride, etc., but they are a smaller share of the cost, usually every ton of aluminum ingots consumes only 200 to 300 yuan.