Calcium carbonate is an inorganic compound that is the main constituent of limestone and calcite. Calcium carbonate powder is limestone and calcite powder after grinding with grinding mills. According to the different production methods of calcium carbonate, calcium carbonate powder can be divided into heavy calcium carbonate, light calcium carbonate, colloidal calcium carbonate and crystalline calcium carbonate.
1. 1250 mesh: pvc, PE, paint, coating grade products, papermaking primer, papermaking topcoat, whiteness above 95 degrees. It has high purity, high whiteness, non-toxic, odorless, low oil quality and low hardness.
2. 800 mesh: used for rubber, plastic, cable, pvc whiteness above 94 degrees
3. 400 mesh to 600 mesh: can be used for toothpaste, soap, it has high purity, high whiteness, non-toxic, tasteless, low oil quality and low hardness.
4. 350 mesh to 400 mesh: used in the manufacture of gussets, downspouts, chemical industry. The whiteness is above 93 degrees.
5. 250 mesh to 300 mesh: used as raw materials and interior and exterior wall coatings in plastic factories, rubber factories, paint factories, waterproof material factories. The whiteness is above 85 degrees.
6. Calcium carbonate within 200 mesh: It can be used as various feed additives with calcium content higher than 55.6 and no harmful ingredients.
Before calcium carbonate is used in other industries, it generally needs to be made into powder. The production process is that after the bulk raw materials are crushed, the finished products are classified under the action of a vibrating screen, and then the screened products are screened by a belt conveyor. The materials are evenly and continuously sent to the grinding mill for grinding, and are sorted under the action of the blower, and then the finished powder is discharged as the finished product.
The calcium carbonate bulk material is crushed by the crusher to the fineness (15mm-30mm) that can enter the mill.
The crushed small pieces of calcium carbonate material are sent to the silo by the elevator, and then sent to the grinding chamber of the mill evenly and quantitatively by the vibrating feeder for grinding. For fine powder processing, superfine mill and superfine vertical mill are generally used; for coarse powder processing, Raymond mill and coarse powder mill are used.
The pulverized material is classified by the powder separator, and the unqualified powder is classified by the powder separator and then returned to the main engine for re-grinding.
The powder that meets the fineness enters the dust collector through the pipeline with the airflow for separation and collection, and the collected finished powder is sent to the finished product silo by the conveying device through the discharge port, and then is uniformly packed by a powder tanker or an automatic baler.
The composition of any production line includes different types of equipment, because when processing materials, any production line includes not only the crushing, grinding or sand making stages, but also the feeding and conveying stages of materials. Here is mainly to introduce the question of what equipment is included in the stone grinding production line.
The stones that can produce calcium carbonate are: limestone, calcite, marble, etc.
The size of the newly mined stone is generally large and cannot be directly added to the pulverizer for processing, because for the processing of rough calcium carbonate, it must be crushed first, then crushing equipment must be used. The grinding equipment on the market mainly includes jaw crusher, hammer crusher, impact crusher and cone crusher. Among them, jaw crushers and hammer crushers are mostly used as coarse crushing equipment, and some types of jaw crushers can be used as fine crushing equipment instead of cone crushers to process materials with higher hardness. The impact crusher is mainly used as a medium and fine crushing equipment for materials below medium hardness.
In the actual production line, a reasonable crusher can be selected according to the different types of stones to be processed, the capacity required by the production line, and the type of mill configured. The equipment after the crushing stage is the milling equipment, which is the core equipment of calcium carbonate processing. The types of mills used in the market mainly include Raymond mills, micro powder mills, ball mills, ultrafine vertical mills, etc. The selection of these different types of mills is mainly based on their performance and production requirements.
Raymond mill is a cost-effective equipment, has strong adaptability to materials, can achieve 325 mesh grinding, good sealing, can effectively prevent dust from flying. The ultra-fine grinding mill is suitable for users who have stricter requirements on the number of meshes. The finished product can reach 325-3000 mesh. The machine adopts a pulse dust collector to capture dust and a muffler to reduce noise, which is environmentally friendly.
As far as the configuration of the calcium carbonate grinding powder production line is concerned, the price ranges from tens of thousands to hundreds of thousands. The more economical configuration scheme is: Raymond mill + feeder, powder separator and other supporting equipment, which is more suitable for crushing stone raw materials. Production requirements under 5 cm. The standard configuration is: crusher + pulverizer + feeder and other supporting equipment, this configuration cost is high, but it is suitable for the production requirements of any raw material size stone processing into powder.
The article mainly introduces the question of what equipment is included in the calcium carbonate grinding powder production line. The analysis of this problem is more detailed. It not only introduces the equipment that needs to be used in the crushing stage and the grinding stage, but also analyzes the more economical configuration and standard configuration. . In actual production, the choice can be made according to different working conditions and different investment costs.
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