Environment-friendly type smelting agent and preparation method thereof

Abstract

The invention discloses an environmental-friendly type smelting agent. The environment-friendly type smelting agent comprises, by mass, the following components of 10-15 wt% of potassium chloride, 25-35 wt% of potassium titanium fluoride, 5-10 wt% of calcium sulphide, 5-15 wt% of magnesium fluoride, 20-40 wt% of potassium fluoborate, 5-15 wt% of potassium aluminium fluoride and 10-40 wt% of sodium chloride. According to the smelting agent prepared with a special technology, the components are uniform; impurities are completely eliminated; besides, by means of the smelting agent prepared witha special ratio, efficient adsorption and dissolution can be conducted on slag, and rapid separation of slag and the melt is achieved; the smelting agent prepared can be used for rapid smelting of aluminum and aluminum alloys; and in addition, the smelting agent can play an aluminum slag-eliminating part and a molten aluminum oxidation-preventing part.

Description

technical field [0001] The invention relates to an environment-friendly smelting agent and a preparation method thereof, belonging to the technical field of alloy smelting. Background technique [0002] China ranks third in the world's aluminum consumption rankings. Although China's aluminum production ranks second in the world, most of the aluminum used in China is imported, and it is the world's largest aluminum importer. The reason for this situation is that China's aluminum industry is still far behind advanced countries in terms of production process control, product quality control, and production scale. Most importantly, China's lack of capacity and a large gap in the supply of high-quality aluminum billets are the main problems. In the process of smelting and casting, aluminum and its alloys are easily oxidized and absorb gas. This characteristic makes gas and inclusions easy to form in molten aluminum, which in turn causes a series of shrinkage porosity, porosity, ...

AI Technical Summary

Problems solved by technology

Most importantly, China shows insufficient capacity and a large gap in the supply of high-quality billet aluminum is the main problem

In the process of smelting and casting, aluminum and its alloys are easily oxidized and absorb gas. This characteristic makes gas and inclusions easy to form in molten aluminum, which in turn causes a series of shrinkage porosity, pores, cracks, shrinkage cavities, etc. of castings. Defects, and these defects will lead to significant deterioration of the fatigue resistance, strength, plasticity, corrosion resistance and other properties of the casting to a large extent, which will directly cause a significant decline in the quality of the product, and even cause the entire casting to be scrapped. The application of aluminum and its alloys is largely limited

[0003] At present, most aluminum and aluminum alloy products are produced by smelting. Practice has proved that when the slag and gas content in the aluminum and aluminum alloy melt are too high, the probability of metallurgical defects such as pores and inclusions in the billet will be greatly increased. Then reduce the strength and plasticity of the material, and affect the surface quality of the product

The normal smelting process in the prior art is: after all the aluminum is melted, add a slag remover to remove the slag, let it stand for about 15 minutes, then add a refining agent for refining, and then let it stand for 15 minutes for secondary refining. The molten aluminum is poured into the flow tank for the refinement process. The whole process has many steps and lasts for a long time. The reason for the need for multiple smelting is mainly due to the dissolution and adsorption of the additives added once during the smelting process to the slag inclusion and separation from the aluminum liquid. The effect is not obvious, there are many impurities in the aluminum liquid, and the aluminum content in the slag is high, which indirectly causes a waste of data; in addition, the slag cleaning agent and refining agent added many times are likely to directly chemically react with the aluminum alloy melt, resulting in pollution. gas