Reverse two-stage filtration method and filtration device for aluminum water

Abstract

The invention discloses a double-level inverse filter method and a filter device for molten aluminum, which belong to the technical field of metallurgy. The filter device comprises a molten aluminum filter channel, and a first-level ceramic filter plate and a second-level ceramic filter plate which are horizontally arranged in the molten aluminum filter channel along the flow direction of the molten aluminum. The molten aluminum passes through the first-level ceramic filter plate from upside to downside, and passes through the second-level ceramic filter plate from downside to upside. According to the invention, the double-level filter of the molten aluminum is realized via the device under the special process conditions, and the molten aluminum ascends at the position of the second-level ceramic filter plate and then passes through the filter plate, so that the gravity influence can be effectively used, the best filter effect can be achieved, and the purity of the molten aluminum is high. The filter channel adopts an inner spiral pipe, so that the molten aluminum can rotationally pass through the second-level ceramic filter plate, small particles can be rotationally gathered to form large particles, the large particles can be settled on the bottom part of the filter channel, and then the filter effect is improved. The filter method and the filter device have the beneficial effects of simple structure, good filter effect and low implementation cost, and can replace the existing single-level filter devices and the on-line processing technology with high cost.

Description

technical field [0001] The invention relates to the technical field of non-ferrous metal smelting and casting, in particular to a filtering device and a filtering method for aluminum water. Background technique [0002] With the increasingly fierce market competition, the quality requirements of aluminum products are getting higher and higher. To improve the quality of aluminum products, the quality of aluminum ingots must be improved first. One of the main factors affecting the quality of aluminum ingots is that the impurities in the aluminum melt cannot be effectively removed. These impurities deteriorate the casting structure of the ingot, destroy the continuity and compactness of the metal, and cause the ingot to be loose and porosity. , slag inclusions and other defects, thereby reducing the processing performance and performance of aluminum, seriously affecting the quality of aluminum products. [0003] In order to improve the quality of aluminum ingots, the purificat...

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a reverse two-stage filtration method and filtration device for aluminum water. The first stage of the method and device is forwardly filtered from top to bottom, mainly to filter impurities and inclusions with less density and coarse size. The slag is filtered out, and the second stage uses the inner threaded pipe wall to form an aluminum water vortex reverse filter from bottom to top, so that the particles in the aluminum water rotate and gather, and the larger particles are automatically settled by gravity, which effectively solves the problem that the existing technology cannot meet at the same time. Technical Problems of Improving Filtration Effect and Reducing Cost

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