Ultrafine calcium carbonate is a functional filler with excellent performance and environmental friendliness. The key to obtaining high-quality ultrafine calcium carbonate and improving its economic benefits is to develop a simple and efficient crushing process and control the particle size and shape of the product.
At present, the superfine grinding of calcium carbonate is mainly divided into dry method, wet method and dry-wet combination process. The dry process is generally used to produce products with d97≥3-5μm, and the wet process is generally used to produce products with d97≤3-5μm.
Calcium carbonate dry superfine grinding equipment and technology
Calcium carbonate dry superfine grinding equipment mainly includes Raymond mill, vertical mill, ball mill, jet mill, stirring mill, vibration mill and various mechanical impact mills.
Raymond Mill: It is widely used to produce calcium carbonate products of 38-74μm (200-400 mesh), and it is also used to produce fine calcium carbonate products with d97=30-15μm (500-800 mesh) after modification and configuration of fine classifiers. pink;
Vertical mill: It can directly produce 325-600 mesh calcium carbonate micropowder (basic demand) products, and can also cooperate with other ultrafine grinding equipment to prepare ultrafine calcium carbonate products.
Ball mill: it is the main equipment of large-scale calcium carbonate production line. It is equipped with various classifiers to produce calcium carbonate products with particle sizes such as d97=5μm, 10μm, 16μm, and 45μm;
Vibration mill: Equipped with fine grading equipment, it is mainly used to produce products with d97=5μm, 10μm, and 16μm, but its stand-alone production capacity is not as good as that of a ball mill;
Mechanical impact mill: The process is simple, but the output is low, and it is mainly used in small and medium-sized calcium carbonate production plants.