Limestone Vertical Mill Production Process
Source:cronus
Posted:2025-09-05 15:06:15
Limestone, the "industrial grain" used in construction, chemical engineering, agriculture, and other fields, has a direct impact on product quality and application performance. How does vertical mill technology overcome the production bottlenecks of traditional grinding mills? How can a seemingly simple grinding device simultaneously perform multiple functions such as crushing, grading, and drying? This article will delve into the secrets of the entire limestone vertical mill production process and introduce you to the core technologies of the modern powder industry.
II.Raw Material Pretreatment: A Solid Foundation for Efficient Production. The first step in limestone vertical mill production is raw material crushing. A vibrating plate feeder evenly feeds raw material from a forklift into the crusher, crushing large limestone lumps to an appropriate particle size of 30-50mm. This stage utilizes a "pre-screening + closed-circuit crushing" process to ensure uniformity of the incoming material and prevent the vertical mill from idling due to overload. Material, conveyed by an elevator to the buffer silo, is fed steadily by a metered feeder, creating optimal conditions for subsequent grinding.
II. Core Grinding: The Technological Breakthrough of Vertical Milling: The core of the vertical mill lies in its revolutionary grinding structure. The rotating grinding disc and hydraulically pressurized grinding rollers form a dynamic compaction system, where grain boundaries fracture under high pressure of 60-80 MPa. This "layer crushing" principle reduces energy consumption by 30% compared to traditional ball mills. Simultaneously, a 6-10 m/s hot air flow injected from the air ring suspends and transports the powder. Coarse particles fall back to the grinding disc by gravity for secondary crushing, while fine powder rises with the air flow. This "crushing and sorting" design increases the system's production capacity by 2-3 times that of traditional equipment.
III. Fine Classification: The Critical Step in Quality Control: The classifier utilizes a cage rotor and guide vanes. Adjustable speed (80-280 rpm) precisely controls the fineness of the finished product (adjustable from 80 to 600 mesh). After classification, qualified fine powder enters a high-efficiency pulse bag filter, achieving a dust removal efficiency of 99.9% and an emission concentration of less than 20 mg/m³. The dust collection system innovatively utilizes "offline cleaning" technology to prevent the cleaning process from disrupting continuous production. Finished products are transported to a 10,000-ton storage facility via an air chute, ensuring a fully enclosed process and preventing dust from leaking.
IV. Technical Advantages and Application Prospects: Modern vertical mill systems integrate drying (capable of processing raw materials with a moisture content of 15%), grinding, and grading, reducing power consumption by 40% compared to traditional processes. A project producing 800,000 tons of fiberglass raw materials annually demonstrated that this system can reduce the overall cost per ton of product by 25 yuan. With the advancement of the "dual carbon" strategy, vertical mill production lines equipped with waste heat recovery devices have become the preferred upgrade solution for industries such as cement and metallurgy.
From raw material crushing to finished product packaging, limestone vertical mill production processes have achieved breakthroughs in both efficiency and environmental friendliness through technological innovation. This "intensive, intelligent, and clean" production model is redefining the industry standard for powder processing. For companies planning to invest in powder projects, selecting the right vertical mill system is a key step in enhancing market competitiveness.
