High-temperature alterant and method for purifying fusant by adopting same

Abstract

The invention discloses a high-temperature alterant, which comprises the following components in percentage by weight: 15 to 20 percent of chloride, 40 to 45 percent of chloride, 25 to 30 percent of rare earth metal compound, 3 to 8 percent of titanium dioxide, and 2 to 6 percent of graphite. The invention also discloses a method for purifying a fusant, wherein the high-temperature alterant is added into a smelting furnace. The high-temperature alterant can reduce the sodium content in an electrolytic molten aluminum fusant and effectively control the grain size to achieve good grain refining effect. The method for purifying the fusant can effectively reduce gas and foreign impurities in the fusant, optimize the production process, ensure the quality of aluminum and aluminum alloy fusants, improve the ingot yield, save the energy consumption, and reduce the discharge of pollutants.

Description

technical field [0001] The invention belongs to the technical field of aluminum electrolysis, relates to a high-temperature modifier, and also relates to a melt purification method using the high-temperature modifier, in particular to a high-efficiency purification method for directly casting aluminum and aluminum alloy melts by electrolyzing primary aluminum . Background technique [0002] With the acceleration of the structural adjustment of my country's aluminum industry, the economical production of aluminum electrolysis enterprises and aluminum processing enterprises has become a development trend. Casting directly with electrolytic aluminum liquid to produce billets for aluminum processing is an advanced production technology with short process, energy saving and consumption reduction, and environmental protection. It integrates aluminum smelting and aluminum processing to achieve the purpose of optimizing resource allocation, reducing production costs and improving e...

AI Technical Summary

Problems solved by technology

Because electrolytic aluminum liquid has many inclusions, high gas content, and poor castability, when it is used for direct billet casting, it is easy to produce heat shrinkage, cold cracking, pore shrinkage cracking, crack expansion and severe segregation, etc., resulting in more ingots. Pores, shrinkage cavities, composition segregation and warpage and other defects, the product quality is difficult to meet the requirements

The existing single purification method is difficult to reduce the content of inclusions and gases in the electrolytic aluminum solution to meet the requirements of the casting slab

Therefore, it is very difficult to purify the molten aluminum by using electrolytic aluminum liquid to directly cast slabs, and it needs in-depth research and development.

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