Talc is a common silicate mineral. It is very soft and has a slippery feel. It often appears as olivine, diopside, amphibole, tremolite, and other mineral forms. It is relatively inexpensive. Ultrafine talcum powder is a finely ground mineral with unique properties, widely used in industries like cosmetics, plastics, and paints. Now, let’s explore the production process and its uses in detail.
Ultrafine talcum powder production process
Talc has a Mohs hardness of 1, with good natural friability and grindability. For fine grinding, Raymond mills are commonly used in China, producing 200 and 325 mesh products. With fine classification equipment, products of 500–1250 mesh can also be produced. Dry production equipment includes air classifier mills, air jet mills, centrifugal mills, and vibration mills. Besides air jet mills, fine classification equipment is often required to meet particle size distribution needs. Common fine classification equipment includes various turbine-type air centrifugal classifiers, such as HTS, ITC, MBS, and CTC models.
Jet milling process
Raw material → feeding → crushing (hammer crusher → bucket elevator → vibrating feeder) → drying (vertical dryer) → medium crushing (hammer crusher) → fine grinding (Raymond mill) → superfine grinding (the jet mills used in industry include disc jet mills, fluidized bed counter-air jet mills, circulating tube jet mills, etc.)→finished products.
Air classifier mill process
Raw material→crushing (hammer crusher, crushing to 8mm is enough)→mechanical impact superfine grinder→turbine type fine classifier (the coarse-grained product after classification can be returned to the mill or can be used as a separate product) →Finished product.
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Plastic industry
Ultrafine talcum powder is used in the plastic industry as a reinforcing filler for polypropylene. In polypropylene modification systems, adding ultrafine talcum powder significantly improves rigidity, surface hardness, and heat resistance. It also enhances electrical insulation, dimensional stability, and impact strength of polypropylene products.
Polyethylene resin industry
When filled in polyethylene, it serves as engineering plastic with good chemical corrosion resistance and flowability. It can compete with ABS, nylon, and polycarbonate.
ABS resin industry
Adding ultrafine talcum powder significantly improves the properties of ABS while reducing costs. It is widely used for injection molding various housings, such as for instruments, TVs, radios, and mobile phones.
Preparation industry
It serves as a dispersing agent for volatile oils, significantly improving patient compliance. The powder coating layer helps eliminate sharp edges, aiding in coating and enhancing tablet stability. As a lubricant, it reduces friction between drug powders and improves powder flowability.
Paper industry
Adding ultrafine talcum powder helps improve filler retention and enhances paper transparency, smoothness, and printability. It also gives the paper higher ink absorbency.
Cosmetics industry
It is a high-quality filler in cosmetics due to its high silicon content, providing infrared shielding. This enhances the sunscreen and infrared protection properties of cosmetics.
Ceramic Industry
Ultrafine talcum powder is used in the ceramic industry to give ceramics different colors.
Textile industry
Ultrafine talcum powder is used in the textile industry as filler and bleaching agent, such as waterproof cloth, fireproof cloth, flour bag, rope nylon, etc., which can enhance the density of the fabric and enhance the heat resistance and acid and alkali resistance.
결론
In conclusion, the production of ultrafine talcum powder involves advanced grinding and classification processes that enhance its properties. With its unique features, ultrafine talcum powder finds wide applications across industries such as plastics, cosmetics, pharmaceuticals, and paper, providing improved product performance and cost-efficiency.
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