The global calcite resources are abundant, and the high-quality calcite resources with CaCO3 content above 97% are also large. Therefore, the current dressing of calcite only requires simple hand selection and washing. At present, the processing of calcite is mainly crushing, grading and surface modification.
The purpose of grinding and grading is to produce a heavy calcium carbonate product that meets the fineness requirements of different application. The process and equipment are determined according to the product fineness requirements. For products below 400 mesh, the general process is: raw ore → crushing → grinding (powder) → classifying. The main equipment includes Raymond mill (suspension roller mill), rotary cylinder ball mill, vertical mill (press roller mill), centrifugal self-grinding or rotary mill, hammer mill, vibration mill, turbine mill and so on.
The ultrafine pulverization process of calcite at home and abroad mainly includes dry and wet methods. The dry process is generally used to produce products with d97 ≥ 3 ~ 5 μm, and the wet process generally uses products with d97 ≤ 3 ~ 5 μm (d90 ≤ 2 μm).
The dry superfine pulverizing equipment used in the industry mainly includes a high-speed mechanical impact mill, a rotary cylinder ball mill, a stirring ball mill, a vibrating ball mill, a high-pressure roller mill, a grading mill, a cyclone self-grinding mill, and a jet mill. In addition to the airflow mill with self-grading function, in order to ensure the product fineness and particle size distribution requirements, fine grading equipment is generally arranged on the actual production line. The configuration methods are built-in and external, and the built-in type is closed-circuit production. In the way, the external type can have two production modes: open circuit and closed circuit. The open circuit type is classified into two different fineness products by the classifier, and the closed circuit type only produces one ultrafine powder.
Calcite ultra fine grinding machine is equipped with the classifying system which can adjust the output powder size between 200 to 2500 mesh.
The heavy calcium carbonate processed by calcite is the most abundant inorganic filler in the current organic polymer based materials. However, the surface-treated heavy calcium carbonate has poor compatibility with the polymer, which tends to cause uneven dispersion in the polymer binder, thereby causing interface defects of the composite material and reducing the mechanical strength of the material. These disadvantages become more pronounced as the amount is increased. Therefore, in order to improve the application properties of the heavy calcium carbonate filler, it must be surface-modified to improve its compatibility or affinity with the polymer binder. Clirik calcite powder surface modification machine (calcite powder surface coating machine) can be a better choice.
All in all, the grinding, classifying and modification process of calcite can all be done in a complete calcite processing plant by Clirik Machinery Co.,Ltd. If you have any needs, you can contact us immediately.