Duplex-structure foamed ceramic filter plate, manufacture method thereof and aluminum melt filtering device

Abstract

The invention relates to a filter in metal smelting process, in particular to a duplex-structure foamed ceramic filter plate, a manufacture method thereof and an aluminum melt filtering device. The duplex-structure foamed ceramic filter plate is prepared by mixing the following raw materials in parts by weight: 35-40 parts of aluminum dihydrogen phosphate, 1-2 parts of pyrogenic silica, 1-2 parts of kaolin, 1-2 parts of aerogel, 55-60 parts of Alpha alumina, 1-2 parts of defoamer, 0.5-1 part dispersant, and the like. The invention is mainly characterized in that the foamed ceramic filter plates with different hole meshes are stacked and combined into a whole by utilizing the manufacture characteristics of the foamed ceramic filter plates to produce a double-layer or multilayer stacked combination body containing the foamed ceramic filter plates with different hole meshes, and then, the stacked combination body is arranged in a filter box body for filtering aluminum melt. As the stacked conjoined structure is adopted, the air exhaust flow and the plate body floating phenomenon in the original method are reduced, and the multi-stage filtration is easy to realize; therefore, the invention really realizes the double-level or multi-level aluminum melt filtering method which has high precision and efficiency and is economic and convenient.

Description

technical field [0001] The invention relates to a filtering device for metal smelting, in particular to a compound structure foam ceramic filter plate, a manufacturing method and an aluminum melt filtering device. Background technique [0002] With the development of science and technology and the improvement of process equipment, people have put forward more requirements for the filtration of aluminum melt. While pursuing high-precision and high-efficiency process methods, people require that the operation is easier and the cost of filtration is lower. Low filtering method. The current bipolar filtration method using double-layer foam ceramic filter plates can significantly improve the removal rate of inclusions; more stable filtration process-reduces the possibility of passing impurities; and its low cost; compact design; strong production flexibility- According to the quality requirements, it can be flexibly used to filter with different holes. However, in the productio...

AI Technical Summary

Problems solved by technology

However, in the production process, we also found that this filtration method has certain defects. Since there is a certain space between the double-layer or multi-layer ceramic filter plates installed in the current filter box, an exhaust process must be adopted during filtration to make the filter The system becomes cumbersome; and the unexhausted gas between the plates is compressed, which often causes the upper filter plate to float, which brings inconvenience to the filtration of aluminum melt

Even the flow of aluminum melt is restricted due to the presence of air between the plates

Furthermore, due to the space between the double-layer filter plates in the current filter box, the lower filter plate is not easy to receive the heat radiation from the heating element on the box body, so that the temperature of the lower plate is difficult to reach the preheating temperature requirement, and it must be Remedy by adding special gas preheating to the lower deck, resulting in higher filtration costs

Images