Calcium Remover Flux 2# Multi Effect Cleaning Purifying Flux is a precision calcium-removal additive specifically engineered for the aluminum alloy smelting process. It is designed to address excess calcium introduced into the melt through raw materials or the smelting operation itself. Utilizing a scientifically formulated active system, this product rapidly identifies and reacts with free calcium within the melt—specifically within the temperature range of 710–740°C. This reaction generates compounds that are insoluble in liquid aluminum; these compounds subsequently float to the surface to form a slag layer, thereby achieving an effective reduction in calcium content. The product offers flexible and controllable application: users first determine the excess calcium level within the furnace, then calculate the required dosage based on a ratio of 7–8 kilograms of Decalcifier No. 2 needed to remove every 1 kilogram of calcium—adhering to the principle of "adding exactly what is needed to compensate for the deficit." The product is supplied in sealed 5-kilogram bags, allowing for convenient, on-demand dispensing and batch-wise addition; this makes it suitable for use in both small-scale experimental furnaces and large-scale industrial production furnaces. Through the application of this product, the purity and mechanical stability of aluminum alloys are significantly enhanced, laying a solid foundation for subsequent casting and processing operations.
Key Advantages
Clear Ratios, Precise Dosage Control
Calcium Remover Flux 2# Multi Effect Cleaning Purifying Flux establishes a clear practical reaction stoichiometry: "7–8 kilograms of decalcifier corresponds to the removal of 1 kilogram of calcium." Process engineers need only calculate the mass of excess calcium—based on analytical results such as spectroscopic analysis—to quickly determine the exact weight of decalcifier required. This approach eliminates the waste and incomplete removal issues often associated with empirical, rule-of-thumb dosing methods. This data-driven dosing model is particularly well-suited for aluminum alloy production environments where strict compositional control is a critical requirement.
Excellent Temperature Adaptability; Does Not Disrupt Normal Smelting Rhythm
The recommended operating temperature range of 710–740°C aligns perfectly with the typical smelting temperatures for common aluminum alloys (such as A356, ADC12, and 6063... ...etc.)—specifically within the standard temperature ranges for melting, holding, and refining. Its application requires no separate heating or cooling cycles, nor does it necessitate extending the holding time; the decalcification process can be seamlessly integrated with slag skimming, modification, or grain refinement treatments, thereby having a negligible impact on the existing production rhythm.
**Gentle Reaction: Protecting Furnace Linings and Tools**
Upon contact with molten aluminum, this product does not generate violent exothermic reactions or excessive fumes. The reaction is stable and controllable, minimizing splashing risks and ensuring a high level of operational safety. Furthermore, its chemical properties exhibit low corrosivity toward graphite rotors, ladles, and furnace lining materials, thereby helping to extend the service life of in-furnace tools and reduce the frequency of equipment maintenance.
**Yielding Higher-Quality Molten Aluminum; Reducing Scrap Losses**
Excessive calcium content directly leads to reduced fluidity in aluminum alloys, an increased propensity for hot tearing, and a deterioration in surface quality. By utilizing "Decalcifier No. 2" to maintain calcium levels within acceptable limits, the castings' gas tightness, elongation, and impact resistance can be restored to optimal levels. This effectively minimizes the generation of defective products caused by calcium-related flaws, thereby boosting the overall material yield rate.
**Practical Packaging: Adapted for Multi-Batch Production**
The standardized small-package design—5 kg per bag—facilitates easy handling, weighing, and incremental addition. Whether the treatment volume for a single furnace is 500 kg or 5 tons, operators can flexibly select the required number of bags, thereby preventing any remaining product from being exposed to moisture for prolonged periods after a bag has been opened. The bag material itself possesses inherent moisture-proof and tear-resistant properties, making it ideal for both warehouse storage and on-site usage.
**Product Applications**
**Targeted Removal of Calcium Impurities in Recycled Aluminum Melts**
Recycled aluminum scrap often carries residual calcium (e.g., from calcium-containing coatings or metal attachments), resulting in elevated calcium levels within the recycled aluminum melt that fail to meet the stringent requirements of high-end alloy grades. By adding this product to the melt at temperatures between 710°C and 740°C, calcium impurities are selectively concentrated into the slag phase and subsequently removed during slag skimming. This process brings the chemical composition of the recycled aluminum melt closer to that of primary aluminum, thereby enhancing the product's market value and competitiveness.
**On-Line Composition Correction for Aluminum Alloy Foundries**
During the production of high-performance aluminum alloy components for the automotive sector (such as wheels, engine blocks, and steering knuckles) or aluminum profiles for rail transit systems, calcium content must be strictly controlled—typically maintained at or below 0.05%. ...continued below. Should an abnormal calcium level be detected in a pre-furnace sample, a calculated amount of "Calcium Remover No. 2" can be rapidly introduced into the holding furnace. After a brief period of stirring, a new sample is taken for verification, enabling rapid corrective action and preventing the entire batch of molten aluminum from being scrapped.
**Preventing Typical Defects in Die Casting and Sand Casting Processes**
Excessive calcium significantly increases the tendency of aluminum alloys to stick to molds while simultaneously reducing melt fluidity, often leading to defects such as cold shuts, hot cracks, and surface tearing. Treating the melt with this product prior to mold filling effectively mitigates the risk of abnormally high surface tension in the molten metal. This improves the molten aluminum's ability to fill complex mold geometries, thereby reducing internal shrinkage porosity and hot cracking in castings, and boosting the yield rate for complex, thin-walled components.
**Periodic Cleaning of Melting Furnaces (Calcium Removal/Furnace Washing)**
In melting furnaces used for the continuous, long-term processing of calcium-containing scrap, calcium compounds gradually accumulate on the furnace walls or hearth. This accumulation can lead to passive contamination, causing the calcium levels in subsequent batches of fresh molten metal to exceed permissible limits. Periodically performing a "furnace washing" operation—utilizing this product in conjunction with mechanical stirring—effectively strips away and removes these calcium deposits, restoring the cleanliness of the melting environment and extending continuous production cycles.
**Flexible Application Across Melting Equipment of Varying Capacities**
Calcium Remover Flux 2# Multi Effect Cleaning Purifying Flux is supplied in convenient 5 kg bags, allowing for flexible, on-demand dosing directly at the production site. For instance, to remove 0.5 kg of calcium from a 500 kg furnace, one would use approximately 3.5–4 kg of the product (a partial bag may be used if the required amount is less than a full bag). Similarly, to remove 2 kg of calcium from a 3-ton furnace, one would use 14–16 kg (equivalent to 3 or 4 bags). This simple, intuitive dosing method eliminates the complications associated with controlling precise quantities when working with large-format packaging once it has been opened.
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