The high pressure roller mill (see Figure 2) consists mainly of a frame, a high pressure roller, a pressure applying device and a transmission. The frame consists of a longitudinal beam and a beam. The high pressure roller consists of a fixed roller and an adjustable roller. The surface of the roller is covered with a wear plate. Each roller is driven by a motor through a planetary gear reducer. The hydraulic cylinder is a pressing member for moving the adjustable roller back and forth along the guide groove and providing appropriate pressure according to the feeding characteristics.
The working principle of the high-pressure roller mill (Fig. 1) is: the material is fed into the two parallel, oppositely rotating rollers by the feeder, and after being subjected to a high pressure of 50 to 300 MPa, it becomes a compact cake. Discharged. In addition to containing a certain proportion of fine-grained finished products, the discharged cake also generates a large number of cracks in the interior of the non-finished particles, and the grinding energy consumption can be remarkably reduced during further grinding by a grinding machine such as a tube mill.
High-pressure roller mill can be used for raw materials and cement clinker, blast furnace slag, limestone, coal and other crushing brittle materials can be used for the lower hardness pulverized iron ore, manganese ore, lead ore and zinc ore plurality of metal.
China's manufacturers of high-pressure roller mills have a medium weight and a heavy weight. At present, Shenyuan and Beijing Blonde also produce such mills.
The medium-heavy production of high-pressure roller mill is a new product developed by the plant after the introduction, digestion and absorption of the advanced technology of Humboldt in Germany in the late 1980s. Its main features are as follows:
1In the grinding system, the roller mill can be used to fully utilize the production capacity of the grinding equipment. Generally, the output can be increased by 30%~40%, and the total energy consumption can be reduced by 20%~30%.
2 Compact structure, light weight and small volume. For the grinding system with the same production capacity, the roller mill can save money.
3 Because of its simple structure and small space occupation, it is convenient to operate and maintain.
Compared with other dry grinding equipment, the 4-roll mill has less dust, low noise and a large improvement in the working environment.
The medium-heavy production high-pressure roll mill and its technical performance are listed in Table 1. The shape and installation dimensions are shown in Figure 2 and Table 2. In addition to the specifications of the roller mills listed in the table, Zhongzhong also designed a variety of different sizes of roller mills according to user requirements, including the new GM120-50 domestic new roller mill, and Φ1.2×50. Φ1.4×80 and the largest Φ1.7×110 roller mill in China.
When ordering, the user should indicate whether the main motor, electrical control system and repair welding equipment are equipped, and auxiliary equipment such as silo and iron remover can be supplied according to user requirements.
A heavy-duty high-pressure roller mill and its technical parameters are shown in Table 3.
Shenjin and Beijing Blonde each produce a high-pressure roller mill of one size (Table 4). Beijing Blonde produces a large high-pressure roller mill with a specification of 880/21~1300, a roller diameter of 2100mm and a roller width of 1300mm. Its structural features are: 1 articulated frame; 2 rollers for easy removal; 3 self-aligning roller bearings; 4 patented torque arm; 5 innovative hydraulic compression system - automatic tilt control; 6HEXADUR wear protection.
The operating advantages of the high-pressure roller mill are: 1 reducing energy consumption; 2 reducing maintenance; 3 long-life wear-resistant protective layer; 4 stable and uniform operation; 5 practicality.
The cost efficiency of the high-pressure roller mill is: 1 large processing capacity; 2 energy saving; 3 low operating cost; 4 small footprint; 5 low investment cost.
The GGY type lever type medium-high roller press produced by Dahua Heavy Machinery adopts the lever structure on the basis of the traditional roller press. The hydraulic cylinder pressure is only 1/2~1/3 of the traditional pressure, and the wear-resistant layer of the grinding roller is adopted. Split form. The utility model has the advantages of simple structure and convenient maintenance, and can be used for fine crushing operation of cement raw materials, clinker and other metal and non-metal ore ball mills . The technical parameters are shown in Table 5.
figure 1 figure 2
Table 1 Table 2 table 3 Table 4 table 5
