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Xintai Group would like to introduce the use and handling of calcium aluminate powder.

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Company News

2022-10-12

How should calcium aluminate powder be used? Users who purchase calcium aluminate powder often find it difficult to work with. However, as the manufacturer of refined slag from calcium aluminate powder, Xintai Group would like to point out that if calcium aluminate powder is not used properly, it simply won't deliver the expected results. Today, Huaxin Refining Slag Manufacturer is here to walk you through the proper usage of calcium aluminate powder—making it easy for you to use, boosting your efficiency, and helping you cut unnecessary expenses.

Calcium aluminate powder is a grayish-white powder whose main components are a mixture of dicalcium aluminate (CaO·2Al₂O₃) and monocalcium aluminate (CaO·Al₂O₃). It is slightly soluble in water, and its aqueous solution is alkaline, with a pH value of approximately 11. Calcium aluminate powder is primarily used in the production of aluminum salt products such as polyaluminum chloride, aluminum sulfate, and sodium aluminate. It can also be used to adjust the degree of alkalinity and as a component in refractory materials.

Xintai Group states that calcium aluminate powder is typically packaged in plastic woven bags, with each bag having a net weight of 50 kilograms. During transportation and storage, the powder should be kept dry, waterproof, and moisture-proof. If it clumps when exposed to water, it must be properly treated before reuse. Calcium aluminate powder exhibits high reactivity with strong inorganic acids and can initiate reactions even at room temperature. The leaching rate of alumina can reach over 90%. Using this material as a raw ingredient to produce liquid or solid polyaluminum chloride can simplify the production process, reduce costs, and improve product quality.

Calcium aluminate powder can be used to prepare polyaluminum chloride by reacting it with hydrochloric acid. According to Xintai Group, during use, first add water to the reaction tank and start stirring the slurry. Then, add hydrochloric acid in a measured amount, dilute it to the desired concentration, and slowly introduce the calcium aluminate powder for reaction. During the reaction process, the temperature inside the tank will gradually rise. When the temperature exceeds 110°C, add an appropriate amount of water to prevent the reaction mixture from overflowing out of the tank. It is necessary to add small amounts of water several times to maintain the normal required temperature. After adding the calcium aluminate powder, allow the reaction to proceed for 2 hours. Once the pH test paper reading exceeds 3, the solution can be diluted with water to achieve a density of 1.25–1.

Molten calcium aluminate (pre-melted aluminocalcium slag) is primarily used in LF furnaces, open-hearth furnaces, and converter ladles for refining steel. It effectively removes impurities such as sulfur and oxygen from molten steel, thereby reducing the content of harmful elements and impurities in the steel. It is suitable for use with ordinary carbon steels, high-carbon steels, and both high- and low-alloy steels. This technology has already been adopted in developed countries such as South Korea, Japan, and those in Europe and the U.S.

The calcium aluminate powder produced by our company, Xintai Group, features a uniform chemical composition, a low melting point, and rapid melting, which can shorten smelting time. It is fluoride-free and does not corrode lining materials or ladle linings. Its compact structure prevents water absorption, making it easy to store and transport. Thanks to its phase stability and quick slag formation, it helps reduce dust pollution in steel plants and ensures process stability. Moreover, it contains no impurities such as hydrogen, nitrogen, or carbon, thereby enhancing the quality of the steel. User testimonials confirm that the stability curve of Xintai Group’s products over time follows a straight-line function. This avoids the numerous adaptation issues caused by the wavy or jagged curves typically seen in lower- and medium-grade products (such as sintered products and blast furnace products) during metallurgical production.

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