How does a limestone grinding mill work?

The high output of HCM Guilin Hongcheng Machinery limestone mill vertical mill has been recognized by many manufacturers in the industry. According to the requirements of a stone mill dolomite powder factory in Guangxi, an 8-head classifier was specially configured. The powder fineness and output have reached unprecedented heights.

1. Limestone Concept
Calcium carbonate is a compound that is a common substance on Earth and can be found in rocks. The main component of animal back shells and snail shells. It occurs in nature as two minerals: calcite and aragonite. Limestone can be directly processed into stone and fired into quicklime. Lime includes quicklime and hydrated lime. The main component of quicklime is calcium oxide, which is generally in the form of lumps, white when pure, and light gray or yellow when it contains impurities. Quicklime absorbs moisture or adds water to become hydrated lime.

2. Application of limestone powder
Limestone powder is mainly used as cement mixture and concrete admixture because the main component of limestone is calcium carbonate. Calcium carbonate is a compound that is a common substance on Earth and can be found in rocks. Limestone is the trade name for limestone as a mineral raw material. Limestone has been widely used in the history of human civilization because of its wide distribution in nature and easy access. As an important building material, it has a long history of mining. In modern industry, limestone is the main raw material for manufacturing cement, lime, and calcium carbide. It is an indispensable flux limestone in the metallurgical industry. After ultra-fine grinding, high-quality limestone is widely used It is used in the manufacturing of paper, rubber, paint, coating, medicine, cosmetics, feed, sealing, bonding, polishing and other products. According to incomplete statistics, the ratio of limestone consumed in cement production to the sum of building stones, lime production, metallurgical fluxes, and ultrafine calcium carbonate is 1:3.

3. Limestone powder making process
The first stage:The crushed large pieces of limestone are transported to the raw material warehouse by special vehicles, and then the materials are sent to the jaw crusher by forklift/manual for crushing until they are smaller than the feed size of the grinding mill.
The second stage:The limestone crushed by the crusher is lifted by the elevator to the storage hopper. The material is discharged from the storage hopper and then the feeder evenly feeds the host machine.
The third phase:During the grinding and grinding process, qualified products are screened by the screening system and then enter the collector through the pipeline. After collection, they are discharged through the discharge valve to become the finished product. Unqualified products fall into the main machine and are re-ground.
The fourth stage:The purified airflow of the finished product flows into the blower through the residual air duct above the dust collector. The air path is circular. Except for the positive pressure from the blower to the grinding chamber, the airflow in the other pipelines flows under negative pressure. The indoor sanitary conditions are good.

4. Selection of limestone grinding mill
There are various models of limestone grinding mills, and different models can be selected according to the different requirements for powder fineness. Currently, in response to the different needs of calcium carbonate milling manufacturers, HCM Guilin Hongcheng Machinery produces a variety of models. Among them, the most popular models includeR series mills, HCH ultra-fine ring roller mills, and HCD series coarse powder mills. There are three types of powder machines. Among them, the fineness of the finished powder produced by the R series Raymond mill can be between 0.18-0.038mm (80-400 mesh), and the fineness of the finished powder produced by the HCH ultra-fine ring roller mill can be between 0.04-0.005mm (400-2500 mesh). mesh), the HCD series coarse powder mill outputs powder between 6mm.

HCM Guilin Hongcheng Machinery environmentally friendly grinding mill-HLM limestone grinding mill stone grinding mill vertical grinding mill
｛Medium diameter of grinding disc｝: 1250-2800mm
{Moisture content of raw coal}: <15%
{Pulverized coal fineness}: R0.08=2-12%
{Moisture content of pulverized coal}: ≤1%
{Production output}: 8-90t/h
{Advantage features}: The grinding mill equipment has a simple structure, stable operation, excellent quality of wear-resistant parts, high degree of automation, excellent performance, high reliability, and has a high reputation in domestic and foreign flour milling production lines.

After continuous innovation and upgrading, HCM Guilin Hongcheng limestone mill-vertical mill, vertical mill, Raymond mill, ultra-fine mill, ultra-fine vertical mill and other equipment are generally welcomed by the market. HCM's customer experience is very good. It has a professional test grinding center. Customers can test grind first and then purchase. The test grinding center is equipped with multiple grinding machines, which can conduct test grinding processing for different types of materials. We serve our customers wholeheartedly. Providing high-quality services, welcome to contact us for details of limestone grinding mill.Email:mkt@hcmilling.com