Turbulent flow type aluminum alloy melt slag removing and filtering device and using method thereof

Abstract

The invention discloses a turbulent flow type aluminum alloy melt slag removing and filtering device and a using method thereof. The turbulent flow type aluminum alloy melt slag removing and filteringdevice comprises a molten aluminum holding furnace, a degassing device, a turbulent flow type runner, an alloy forming machine and flow grooves, wherein the molten aluminum holding furnace communicates with the degassing device through the flow grooves, the degassing device is connected to one side of the turbulent flow type runner through the flow grooves, and the alloy forming machine is connected to the other side of the turbulent flow type runner through the flow grooves; and the turbulent flow type aluminum alloy melt slag removing and filtering device further comprises a first filteringdevice and a second filtering device, wherein the first filtering device is arranged between the degassing device and the turbulent flow type runner, and the second filtering device is arranged between the turbulent flow type runner and the alloy forming machine. According to the turbulent flow type aluminum alloy melt slag removing and filtering device, fine impurities in an aluminum alloy meltare collided and aggregated through the turbulent flow type runner and are removed through the filtering devices, molten aluminum is further purified, the quality of an aluminum alloy casting is improved, adopted filters are large-porosity foamed ceramic filtering plates, the flow rate of the aluminum alloy melt is increased, the production efficiency is improved, the loss of the foamed ceramic filtering plates is reduced, and the production cost is reduced.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy processing, in particular to a flow-disturbing type aluminum alloy melt slag removal and filtering device and a use method thereof. Background technique [0002] Aluminum alloy slag removal is one of the key processes in the process of aluminum alloy melting and casting. Especially when scrap aluminum is used as raw material to produce aluminum alloy, it is more difficult to control the cleanliness of the melt. Common inclusions in aluminum alloy melts mainly include oxides produced during melting and transport, such as Al 2 o 3 , SiO 2 , MgO, etc., chlorides, nitrides, carbides produced during melt purification, as well as refractory brick fragments, falling launders and coatings on tools, etc. Due to the existence of inclusions, the fluidity of the melt is affected, resulting in slag inclusions, shrinkage porosity, etc. in the casting after solidification, and the inherent properties ...

AI Technical Summary

Problems solved by technology

The glass cloth filtration method has low cost, simple structure and convenient installation, but the slag removal effect is poor; the foam ceramic plate has high filtration precision, convenient operation, and medium cost, but the foam ceramic filter plate has a better effect on filtering inclusions larger than 10 microns (such as filtering The inclusion efficiency of 40 microns can reach 90%), and the inclusion filtering effect of less than 10 microns is poor (only about 30%)

Moreover, the filter plate can only be used once. Due to the small pores of the filter plate, the filtration efficiency is very low, and the melt flow rate is generally only 0.6~0.7mm / s; High cost, more residual aluminum, easy to cause failure of refiner, etc.

At the same time, because the density of fine impurities is similar to that of aluminum, it is generally suspended in the aluminum liquid, and it is difficult to remove it by direct filtration.

Images