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Calcium carbonate mills, also known as calcium carbonate grinders or calcium carbonate grinding mills, primarily grind calcium carbonate minerals into various powders suitable for diverse industrial applications.
Calcium carbonate is an inorganic compound composed of calcium, carbon, and oxygen, with the chemical formula CaCO₃. It ranks among the most common minerals on Earth. It is commonly found in minerals such as marble, limestone, and calcite, and is also the primary component of shells and eggshells. This substance is chemically stable but readily reacts with acids. Consequently, it is widely utilized by humans in numerous fields, including building materials and industrial raw materials (such as smelting and cement manufacturing), serving as a fundamental raw material in industrial production.
Lump calcium carbonate raw materials (such as limestone or calcite) are first crushed by a jaw crusher into coarse particles of approximately 50-100 mm in size. These are then subjected to secondary crushing using an impact crusher to produce fine particles of 5-10 mm, preventing large lumps from damaging grinding equipment.
Select grinding equipment based on dry or wet grinding:
1.Dry Grinding Process: Feed pretreated fine material into a Raymond mill for initial grinding to coarse powder (80-200 mesh). For finer grades (e.g., 500-3000 mesh), transfer coarse powder to a vertical mill for ultrafine grinding.
2.Wet Grinding Process: Pump the slurry into a ball mill. High-speed rotation of steel balls within the mill impacts and grinds the slurry to achieve a fineness of 1-10 microns.
The ground powder enters a classifier. Coarse particles failing to meet the required fineness are returned to the grinding mill for reprocessing, ensuring uniform particle size in the final product.
Qualified powder is collected via pulse dust collectors, where dust and impurities are removed. The purified powder is then automatically packaged into woven bags or sealed containers, completing the finished product production.
Calcium carbonate ball mills utilize internal grinding media to generate collision, impact, and shear forces. During this process, calcium carbonate particles are progressively ground to the target fineness. Ball mills can be categorized into wet grinding and dry grinding methods. Calcium carbonate ball mills typically process particle sizes greater than 800 mesh or within the 20-400 mesh range.
The calcium carbonate Raymond mill is a dry grinding equipment for processing calcium carbonate powder. It applies pressure and grinding to materials through the centrifugal rolling of grinding rollers within the grinding ring. Crushed calcium carbonate feedstock is pulverized into powder within the grinding zone. The powder is then conveyed by airflow to the top-mounted cyclone classifier for precise separation: qualified fine powder is collected as finished product, while coarse particles are returned to the grinding zone for reprocessing. This closed-circuit system efficiently produces calcium carbonate powder in various specifications ranging from 80 to 600 mesh.
The jaw crusher is the core equipment for primary crushing in mining and aggregate processing. It simulates the chewing motion of an animal using two jaw plates—a moving jaw and a stationary jaw—to perform coarse and medium crushing operations on materials. It efficiently processes various large, hard materials with compressive strengths up to 320 MPa (e.g., granite, basalt, ores), typically reducing feedstock to a particle size of approximately 10-350 mm in a single pass. This prepares appropriately sized material for secondary crushing or ball milling.
A vibrating feeder is mining machinery that utilizes vibration principles to uniformly and continuously transport lumpy or granular materials from storage bins to receiving equipment. Its feed rate can be precisely adjusted, and it effectively removes impurities, making it an indispensable key piece of equipment in production lines across mining, metallurgy, building materials, and chemical industries.
Classifier machine
The classifier serves as the core sorting equipment in powder processing lines. It utilizes differences in settling velocity of particles within air or liquid streams to separate ground materials by particle size. Oversized particles are returned to the ball mill for re-grinding.
The global calcium carbonate market is experiencing steady growth. The core value of ground calcium carbonate lies in transforming natural limestone from a common raw material into a versatile material. Widely used as the backbone of construction cement and concrete, it also serves as a functional filler in industries such as papermaking, coatings, plastics, and rubber. Further processed calcium carbonate is commonly found in household chemicals, food, pharmaceuticals, and even environmental desulfurization processes, earning it the title of “universal material.”
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