Granular Refining Agent: A Revolutionary Tool for Metal Melting and Purification

　　I. Technical Advantages of the Granular Formulation

　　The granular refining agent is produced through a specialized process that transforms active ingredients—such as fluoride and potassium salts—into a granular structure. Its highly porous surface and large specific surface area significantly enhance its adsorption efficiency. In an aluminum melt environment maintained at 700–780°C, the granules rapidly decompose, releasing active substances that chemically react with inclusions like alumina (Al₂O₃) and aluminum nitride (AlN) present in the molten aluminum. These reactions form low-melting-point compounds, such as NaF and CaF₂, which are then effectively removed via floatation and slag separation, achieving deep purification. Experimental results show that this innovative agent can reduce hydrogen content by up to 80%–90%, while removing more than 70% of inclusions—representing a 15%–20% improvement in efficiency compared to conventional powdered refining agents.

　　II. Efficient Decontamination and Degassing Mechanism

　　Chemical Adsorption and Reaction

　　The controlled-release technology for sand-like particles enables a gradual release of components, extending the reaction cycle. For instance, the fluoride component reacts with magnesium and iron impurities in the molten aluminum to form fluoride precipitates, while the chloride component removes oxide impurities by generating compounds like aluminum chloride. This synergistic multi-component approach ensures effective purification throughout the entire process.

　　Synergistic Physical Flotation and Bubble Technology

　　When inert gas is injected, the sand-like particles combine with the gas to form a stable bubble cluster, which carries the adsorbed impurities upward to the surface of the molten aluminum, creating a dry, powdery slag. This process enhances the physical adsorption capacity by 30% compared to conventional refining agents, effectively reducing gas content (such as hydrogen) in the aluminum melt and thereby lowering the porosity of cast components.

　　III. Examples of Material Performance Optimization

　　Improved Mechanical Properties

　　After applying the granular refining agent to A356 aluminum alloy, tensile strength improved by 25%-30%, and elongation increased by 18%-22%. Data from a leading aerospace component manufacturer show that the fatigue life of the refined aluminum alloy was extended by 40%, meeting the demands of high-end manufacturing.

　　Improved Corrosion Resistance and Surface Quality

　　By completely avoiding the "sodium embrittlement" phenomenon caused by sodium-containing refining agents, the granular refining agent reduces surface white spot defects in aluminum materials by 90% and lowers the corrosion rate by 60%. In automotive wheel hub production, its application has extended the product's salt-spray test endurance to over 1,000 hours.

　　4. Process Compatibility and Environmental Features

　　Multi-form and process compatibility

　　The sand-like refining agent is available in two forms: powder (1 kg per bag) or cylindrical blocks (0.5 kg per piece), suitable for processes such as spray application, bell-type pressing, or direct pouring. Dosage should be adjusted according to the furnace size: 0.1%–0.3% is recommended for large reverberatory furnaces, while 0.4%–0.6% is ideal for small crucible furnaces—ensuring a balance between cost-effectiveness and purification performance.

　　Environmental Protection and Operational Safety

　　No toxic gases such as chlorine gas (Cl₂) are emitted, minimizing risks to operators and equipment. Some formulations use non-toxic ingredients, further reducing the environmental impact. Additionally, the amount of dry floating sludge produced is 50% lower compared to traditional refining agents, making it easier to recycle and manage.

　　5. Typical Application Scenarios

　　Aerospace structural components

　　In phosphorus-modified aluminum alloys (such as A386) and high-magnesium alloys, sand-type refining agents enhance the modifying effects of strontium and phosphorus modifiers, optimizing the grain structure and resulting in a 15%-20% improvement in the material's yield strength.

　　Electronic packaging materials

　　Aluminum materials are prepared for precision components such as chip heat-sink substrates by removing impurities to ensure excellent electrical conductivity and thermal stability, meeting the demand for high-purity aluminum melt (oxide content ≤ 0.02%).

　　Lightweight automotive components

　　In the production of components such as wheel hubs and chassis, a sand-like refining agent increases the elongation of aluminum materials by 10%–15%, while simultaneously reducing processing energy consumption by 15%–20%.