vertical roller mill is the equipment specializing in producing fine and superfine powder of non-inflammable, non-explosive and brittle materials with Mohs’s hardness under six, such as calcite, chalk, limestone, dolomite, kaolin, bentonite, talc, mica, magnesite, illite, pyrophyllite and vermiculite, sepiolite, attapulgite, rectorite, diatomite, barite, gypsum, alunite, graphite, fluorite, rock phosphate, kalium ore, pumice, etc., totally more than 100 kinds of materials.
vertical roller mill mainly consists of main unit, classifier, powder collector, dust cleaner, blower, muffler, sound-proof room, crusher, bucket elevator, storage hopper, and vibrating feeder.
Working principle of vertical roller mill:
After crushed by hammer crusher, the large materials become small ones and are sent to storage hopper by elevator, edge of then evenly sent to the upper distribution plate of the turnplate by vibrating feeder and sloping feeding pipe. When the grinding mill is at work, all the grinding rollers are rolling in the ring, and the materials are driven to the edge of the turnplate by the centrifugal force and fall down into the grinding chambers where the materials are repeatedly pressed, crushed and grinded by the rollers. The high-pressure air blower constantly inhales air within the grinding mill and, in turn, the air flow with crushed materials are brought to the classifier whose high-speed impeller will screen the airflow: the unqualified particle size will fall and return to the mill for being reground while the qualified particle size mixed with air will go into the cyclone powder collector. Most of the qualified powders will fall an exit from the discharging valve at the bottom; a small proportion of the fine powders, with airflow, moves to the dust cleaner, and clings to the surface of the filter bags. At the same time, the fine powders clinging to the surface fall down by the sudden vibration of the filter bags, which is caused by the instantly ejected high-pressure gas controlled by the pulse valve. The materials from the above two lots are sent by the conveyor at the bottom to get finished powders packed. In addition, filtered clean air will be emitted from the air outlet of muffler in the end.
Features of vertical roller mill
1. High efficiency
Under the same finished final size and the same motor power, the capacity of micro powder grinding mill is twice as much as jet mill, mixing grinder and ball mill.
2. Long lifecycle of spare parts
The ring and roller are forged by special material with high utilization. Under the same grinding material and finish special size, the lifecycle of spare parts is about one year, which is 2-3times longer than impact mill or turbo mill. Furthermore, the lifetime can reach 2-5 years for grinding calcite carbonate.
3. High safety and reliability
As no rolling bearings or screws in grinding cavity, there are no problems caused by bolts shedding or rapid wear of bearings and seal components.
4. High fineness and flexible adjustment
The final fineness of the grinding materials can be adjusted between 325 meshes and 3000 meshes, and the product fineness can reach D97≦5um.
The application of pulse deduster and muffler greatly alleviates dust pollution and noise.
Model and technical data of vertical roller mill
Model HGM8021 HGM9024 HGM10027 HGM10036
Ring Diameter(mm) 800 900 1000 1000
Ring Number/pcs 3 3 3 4
Roller Number/pcs 21 24 27 36
Main Shaft Speed/r. p. min 230 200 180 180
Input Size/mm ≦20 ≦20 ≦20 ≦20
Finished Size/um 5-47 5-47 5-47 5-47
Capacity t/h 0.4-4.5 0.4-5.5 0.6-6.5 0.7-7.5
Outlet Size L*W*H/m 13.9*4*6.2 14.7*4.8*7.2 18*4.6*8.6
Shanghai Clirik Machinery Co., Ltd
Address: No.19Fuqing Rd,Shanghai 201201,China
http://saico.net http://www.clirik.com http://www.micro-mill.org
Shanghai Clirik Machinery Co., Ltd, located in Pudong New Area of Shanghai, China, is a large professional manufacturer with import & export rights specializing in research, manufacture and sales of crushing machinery, mining equipment, and grinding machines, such as micro powder grinding mills, ultrafine mills, stone grinder mills, hammer crushers, jaw crushers and associated accessories. The grinding mills and crushers are widely applied in metallurgy, hydraulic engineering, mining, chemical, construction, coal, refractory, ceramic and other industries.
As one of the pioneer manufacturers who have engaged in crushers and micro powder grinding mills for over 20 years, Shanghai Clirik Machinery Co. Ltd. has strong capability in R&D, design and manufacturing. However, to better meet the challenges of modernization and the needs of international market competition, Clirik still insists on the communication and cooperation with prestigious scientific research institutions from both home and abroad to strengthen its ability in machinery design, production, maintenance, testing and reform.
With several years’ efforts, Clirik now grows to be a first-class manufacturer of mining machines with a complete advanced production line established, covering the main products below:
1. Stone crushing equipment series: crusher machine, jaw crusher, hammer crusher, stone crusher, hammer mill，ore crusher, and crushing plant.
2. HGM micro powder grinding machinery: ultrafine mill, powder grinding mills, rock grinding mills, stone grinding machine, milling machinery, , quarry plant, and grinder mill.
3. Auxiliary products: vibrating screen, classifier, bucket elevator, belt conveyor, vibrating feeder, and other associated equipment