Vertical coal mill is a specialized equipment used to grind coal into coal powder, which has a wide range of applications in various industries such as power, cement, and chemical. Here is the relevant introduction:
Structural composition
Grinding disc: located at the bottom of the mill, it is the main working component for grinding coal. A wear-resistant lining plate is usually installed on the grinding disc to improve its service life.
Grinding roller: Generally installed above the grinding disc, it applies pressure through a hydraulic system to squeeze coal between the grinding disc and the grinding roller for grinding. The number of grinding rollers is usually 2-4, and their surfaces are also made of wear-resistant materials to resist wear during the grinding process.
Separators: located at the upper part of the mill, used to classify the ground coal powder. It uses rotating blades or airflow to return coarse powder that does not meet the particle size requirements to the grinding disc for further grinding, while qualified fine powder is discharged from the mill with the airflow.
Transmission device: including motor, reducer, etc., used to drive the rotation of the grinding disc and provide power for the grinding process.
Sealing device: prevents coal powder leakage and external air from entering the mill, ensuring the normal operation of the mill and a clean working environment.
Working principle:
The material enters from the feed port of the mill and falls onto the rotating grinding disc. The grinding disc rotates under the drive of the transmission device, generating centrifugal force that moves the material towards the edge of the grinding disc. During the movement, the material is gradually crushed and ground by the rolling and grinding action of the grinding roller. At the same time, the hot air introduced from the bottom of the mill blows up the ground coal powder, forming a gas-solid two-phase flow. In the rising process, the pulverized coal is graded through the separator, and the qualified pulverized coal is discharged from the mill with the airflow and enters the subsequent pulverized coal collection system; Unqualified coarse powder is returned to the grinding disc under the action of gravity for further grinding.

Specifications And Technical Parameters Of HVM Vertical Mill

Advantage
Small footprint: Compared with traditional ball mills, vertical coal mills have a more compact structure and can reduce the footprint by about 30% -50%, effectively saving factory space and construction costs.
High grinding efficiency: Using the material bed grinding principle, the material is squeezed and ground between the grinding disc and the grinding roller, resulting in high energy utilization. The grinding efficiency is about 30% -50% higher than that of a ball mill, which can reduce electricity consumption.
Strong drying ability: It can use kiln exhaust gas or other hot air as a drying medium to dry coal while grinding, and can process coal with high moisture content. Generally, it can dry coal with moisture content of about 15% -20%, and specially designed mills can even process coal with moisture content as high as 25% -30%.
Good product quality: Through precise classification by the separator, coal powder with uniform particle size and large specific surface area can be produced, which is beneficial for improving coal combustion efficiency and reducing energy consumption.
Low operation and maintenance costs: The wear of grinding rollers and grinding discs is relatively uniform, with a long service life, easy maintenance, short downtime, and can effectively reduce maintenance costs and losses caused by production interruptions.
Application Area
Power industry: used in thermal power plants to grind coal into powder for efficient combustion in boilers, generating steam to drive steam turbines for power generation.
Cement industry: In the cement production process, vertical coal mills are used to grind coal and provide fuel for cement kilns to meet the heat required for cement clinker calcination.
Chemical industry: Some chemical production processes require the use of coal powder as raw material or fuel. Vertical coal mills can grind coal into suitable particle sizes to meet the requirements of chemical processes.

Hefei Hengcheng Industrial Equipment Technology Co., Ltd. (hereinafter referred to as Hengcheng) was established in 2008. The company is located in Hefei, Anhui, a famous science and education city in China. It is a national-level high-tech enterprise and technology-based enterprise specializing in powder industry technology and equipment R&D, manufacturing, sales and service. The company has passed the ISO9001 international quality system certification.

Our company's main products : Vertical Coal Mill,Limestone Vertical Mill,Vertical Raw Mill,Slag Grinding Mill,Gypsum Grinding Mill,Calcite Mill,VRM Cement Mill,Bentonite Grinding Mill,Dolomite Grinding Mill,Bauxite Grinding Mill and pneumatic conveying system equipment. Among them, the grinding system equipment includes HVM vertical mill, rotary air lock feeder, and pressure-resistant sealed metering feeder. The products of the pneumatic conveying system equipment include PCD type positive pressure dense phase pneumatic conveying bin-type pump, PJP type positive pressure dilute phase pneumatic conveying jet pump, and HL type high-efficiency pneumatic fluidized blanking and blockage removal device.

Since its establishment, the company has always adhered to the development concept of "Based on Industry and Equipped in the World", and is committed to providing domestic and foreign customers with a complete set of system solutions in the powder industry field covering powder industry preparation, engineering design, engineering general contracting and technical services and consulting. Program. The company's core technology products have been widely used in the powder processing fields of building materials, metallurgy, chemical industry, heat, energy, electric power, lime kiln, pellets, mineral processing (including metal and non-metallic minerals), port warehousing and logistics and other industries.

The company has a professional technical team composed of high-quality talents such as experts and scholars, senior engineers and postgraduates who have won the National Science and Technology Progress Award and participated in the formulation of relevant industry standards. Practical experience, has rich engineering practice experience and theoretical basis. At the same time, the company has established technical cooperation and exchange relations with a number of key universities, absorbed the cutting-edge technologies in the powder industry at home and abroad, and closely followed the development trend of the powder industry, so as to provide customers with advanced and reliable powder equipment and various professional services. Technical Services.

Aiming at the two important links of powder preparation and powder transportation in the powder industry, the company has deeply studied the physical and chemical properties of various types of powder materials in different industries and fields after years of technical accumulation and a large number of engineering practices. On this basis, we have developed powder processing technology and complete sets of equipment that are highly targeted, safe, reliable, efficient and energy-saving.

We have a professional technical team composed of experts and scholars, senior engineers and postgraduates who have won the National Science and Technology Progress Award and participated in the formulation of relevant industry standards. All team members have more than ten years of experience in large state-owned design institutes in the industry Experience, has a wealth of engineering practice experience and theoretical basis. It can provide professional and systematic engineering design services for customers in various industries involving grinding system and pneumatic conveying system engineering, and provide a complete set of solutions in the field of powder engineering.

We have undertaken a large number of domestic and foreign (currently the company exported to Indonesia, Vietnam, the Philippines, Pakistan, Egypt, Yemen, Saudi Arabia, Congo and other countries and regions in the world) the metallurgical industry limestone powder milling and pneumatic powder conveying projects and coal powder preparation And pneumatic conveying project, lime kiln industry pulverizing and pneumatic powder conveying project, coal powder preparation and pneumatic conveying project, cement industry grinding system and conveying system renovation project and other engineering design projects, the design of the engineering project equipment selection is reasonable, The design scheme is scientific and reasonable, concise, practical, and cost-effective, all of which have reached or exceeded the expected indicators, and have been highly recognized and praised by users. The project has won the company's reputation in the industry.

Our goal: to sell the best machines at the best prices with industry-leading customer service. We personally know each of our customers, always adhering to the development concept of "Focus On Powder,Equipping The World", we are committed to providing powder industry services covering powder industry preparation, engineering design, engineering general contracting and technical services and consulting for customers around the world. A complete set of system solutions in the field.

For more detailed information on our Powder Industry Technology and Equipment, please do not hesitate to contact us! We welcome your inquiries, and look forward to working with you.