Desulfurization Limestone Powder Grinding Machine, Large Vertical Roller Mill High Calcium Stone Powder Production Line

Desulfurization Limestone Powder Grinding Machine, Large Vertical Roller Mill High Calcium Stone Powder Production Line

Description

HVM Vertical Mill:
The Hefei Hengcheng HVM vertical grinding machine has advantages such as high grinding efficiency, low power consumption, large feed particle size, easy adjustment of product fineness, simple equipment process flow, small footprint, low noise, low dust, simple use and maintenance, low operating costs, and low consumption of wear-resistant materials.

Advantages and characteristics of limestone ultrafine vertical roller mill:
1. Vertical grinding mill have advantages such as high grinding efficiency, low power consumption, large feed particle size, easy adjustment of product fineness, simple equipment process flow, small footprint, low noise, low dust, easy use and maintenance, low operating costs, and low consumption of wear-resistant materials.
2. The comprehensive investment cost of limestone vertical mill is low.
3. Easy maintenance and low operating costs.
4. High grinding efficiency.
5. Stable production and quality.
6. High reliability.
7. Environmental protection.
8. High degree of automation.

Working principle:

The electric motor drives the grinding disc to rotate through the reducer, and the material falls into the center of the grinding disc from the feeding port. At the same time, hot air enters the grinding chamber from the inlet. Under the action of centrifugal force, the material moves towards the edge of the grinding disc and is crushed by the grinding roller when passing through the circular groove on the grinding disc. The crushed material is carried up by the high-speed airflow at the wind ring at the edge of the grinding disc, and large particles directly fall onto the grinding disc for re grinding. When the material in the airflow passes through the dynamic and static separator, under the action of the rotating rotor, the coarse powder falls onto the grinding disc for re grinding, and the qualified fine powder is discharged with the airflow, Collecting in the powder collection device is the product. Materials containing moisture are dried during contact with hot gases to achieve the required product moisture.

Limestone vertical mill Equipment structure and principle
The electric motor drives the reducer to rotate the grinding disc, and the material is fed into the center of the rotating grinding disc by the lock air feeding equipment. Under the action of centrifugal force, the material enters the powder grinding track. The grinding rod continuously rotates and presses iodine, causing the material to be crushed by squeezing, grinding, and shearing. At the same time, hot air is evenly sprayed upwards from the wind ring surrounding the grinding disc at high speed. The ground material is blown and dried, and enters the classifier with the wind. Qualified fine powder passes smoothly and is collected by the dust collection equipment to form the product. Unqualified coarse powder falls back onto the grinding disc under the action of the classifier blades, and is re ground with the newly fed material. This cycle completes the entire grinding process.
Main unit sectional structure: Adopting standard modular design and manufacturing of pressure device, as the mill capacity increases, the number of grinding rollers will correspondingly increase, which can meet the requirements of different materials, different product fineness and output.

It can be widely used in industries such as electricity, metallurgy, solid waste treatment, cement, chemical industry, non-metallic minerals, etc. It is mainly used for grinding cement raw materials, clinker, desulfurization limestone powder, slag, steel slag manganese ore, coal mine, phosphate ore and other materials. The materials ground range from high humidity (20-30% moisture content) to dry materials (<1%), from exceptionally difficult to grind to easily ground materials, with product fineness ranging from coarse to fine and a variety of grinding types.

Technical Data

Re:The data based on Mohs'hardness 3-4 material

      Limestone Bond Index≤13kwh/t

Advantages and characteristics
Grinding efficiency is high, energy consumption is low, and compared to ball milling, energy consumption is 40-50% lower. It has a large single machine production capacity and can utilize low valley electricity.
High degree of automation
Adopting a PLC fully automatic control system and capable of remote control, it is easy to operate, easy to maintain, and reduces labor costs.
Stable product quality
The material stays in the grinding machine for a short time, reducing repeated grinding. The product has a uniform particle shape, narrow particle size distribution, good fluidity, strong adaptability, and a very low iron content, high whiteness and purity.
Low operation and maintenance costs
The grinding roller can be flipped out of the machine using a hydraulic device, making maintenance operations convenient. The grinding roller sleeve can be flipped over for use, extending the service life of wear-resistant materials with low wear. The lining plates of the grinding roller and grinding disc are made of special materials, which have a long service life.
Low noise environmental protection
The entire system has low vibration and low noise. It adopts an overall sealed negative pressure operation system, an air box pulse dust removal system, and no dust overflow, basically achieving a dust-free workshop.
Strong drying ability
Directly blowing hot air, the hot air comes into direct contact with the material inside the mill, with strong drying ability. The maximum moisture content of the feed can reach 15%, without the need for an additional dryer, saving equipment investment and energy consumption costs.
High reliability
Adopting a grinding roller limiting device to avoid severe vibration caused by material breakage in the mill, a new type of grinding roller sealing device is adopted, which is reliable and does not require a sealing fan, further reducing the oxygen content in the mill and achieving excellent explosion suppression performance.
Low comprehensive investment cost
Integrating crushing, drying, grinding, grading, and conveying, the process flow is simple, the structural layout is compact, and the land area is small, only 50% of that of ball milling. It can be arranged outdoors, with low construction costs, directly reducing investment costs.