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Raymond mill is one the most commonly used grinding mill in China's grinding industry. It has been widely used in the milling and processing fields of more than 280 kinds of materials in the industries of nonflammable and nonexplosive minerals, chemicals, construction, etc., such as barite, calcite, potash feldspar, talc, marble, limestone, dolomite, fluorite, lime, activated clay, activated carbon, bentonite, kaolin, cement, phosphate rock, gypsum, glass, thermal insulation materials, etc., that the Mohs hardness is not more than 9.3, the humidity is less than 6%, and the fineness of finished products is less than 600 meshes.
The complete set of Raymond mill grinding plant generally consists of a host, analyzer, pipeline device, blower, cyclone separator of finished product, jaw crusher, bucket elevator, electromagnetic vibration feeder, electric control motor, etc. Among them, the Raymond mill is composed of frame, inlet volute, blade, grinding roller, grinding ring, cover, and motor, etc.
The materials that need to be crushed are added to the Raymond mill from the feeding hopper on the side of the cover shell. By relying on the grinding roller device suspended on the main machine's plum blossom frame, it rotates around the vertical axis while rotating itself. Due to the centrifugal force during rotation, the grinding roller swings outward and presses tightly against the grinding ring, so that the blade scoops up the material and sends it between the grinding roller and the grinding ring. The material is grounded due to the rolling and crushing of the grinding roller.
The main advantages of Raymond mill are as follows:
（1） Raymond mill has compact structure, small space occupation, strong completeness, and an independent production system from block materials to finished powder.
（2） The finished powder has a uniform fineness and a passing rate of 99%, which is difficult for other grinding mills to achieve.
（3） The main transmission device of the Raymond mill adopts a sealed gearbox and pulley, which ensures smooth transmission and reliable operation.
（4） The important components of Raymond mill are made of high-quality steel, and the wear-resistant parts are made of high-performance wear-resistant materials. The entire grinding mill has high wear resistance and reliable operation.
（5） The electrical system adopts centralized control, and the grinding workshop can basically achieve unmanned operation, with convenient maintenance.
With the widespread development of non-metallic minerals in the field of ultrafine powder application, downstream enterprises have increasingly high requirements for the finished powder, especially with higher requirements for the fineness. To make the grinding mill has better fineness, ZENITH kept developing and updating the Raymond mill.
The selection of Raymond mill is quite important. As a major manufacturer of Raymond mill, ZENITH conducts a detailed analysis of the selection issues of Raymond mills and here are some tips for you.
The selection of Raymond grinding mill is mainly influenced by various factors such as the properties of the raw materials (including mineral structure, hardness, color, required product particle size content, particle shape, etc.). In addition, it is necessary to consider the installed capacity of the entire machine from a practical perspective, that is, the power consumption (energy consumption) and the required powder production per unit time. For powders with special requirements, customers should pay attention to the particle shape of the powder product.
Based on the above questions, ZENITH suggest that when selecting Raymond mill, users should first understand the type of equipment they are planning to purchase, the working principles, and the effect of the grinding mill. Only in this way can the selection of equipment meet the requirements of the output capacity, product particle size, grading, etc.
Start up
Before starting the grinding mill, check whether all the access doors are closed tightly, check whether the jaw plate gap of the jaw crusher conforms to the feed particle size, and adjust the speed of the analyzer to meet the requirements of approximate finished product particle size. Finally, start the machine in the following sequence:
1. Start the bucket elevator;
2. Start the jaw crusher;
3. Start the analyzer when there are materials in the silo;
4. Start the blower (Start with no load and load it after normal operation);
5. Start the Raymond grinding mill and immediately start the electromagnetic vibration feeder upon starting the machine. At this time, the Raymond mill starts to work.
The simple starting sequence is as follows: elevator → crusher → analyzer → blower→ host → feeder.
Shutdown
When the Raymond mill is shut down, each machine should be shut down in the following order:
1. Turn off the feeder first and stop feeding;
2. Stop the host in about one minute;
3. Stop the blower after blowing out the remaining powder;
4. Finally, shut down the analyzer.
Attention:
During normal operation of Raymond mill, it is not allowed to add lubrication oil arbitrarily. If any abnormal noise or sudden increase in load occurs in any part of the grinding mill, it should be immediately stopped for inspection and troubleshooting to avoid major accidents. When start up the machine again, it is necessary to remove the remaining materials from the mill, otherwise the current will be too high during startup.
During the use of the Raymond mill, there should be fixed personnel responsible for monitoring it, and the operators must have certain level of technical proficiency. Before installation of the grinding mill, necessary technical training must be provided to the operators to understand the principle and performance of the Raymond mill and familiarize them with the operating procedures.
To ensure the normal operation of the Raymond mill, "Equipment Maintenance Safety Operation System" should be established to ensure the long-term safe operation of the grinding mill. At the same time, necessary maintenance tools, lubricating grease or oil, and corresponding accessories should be provided.
After using the Raymond grinding mill for a period of time, maintenance should be carried out, and vulnerable parts such as the grinding roller, grinding ring and blade should be repaired and replaced. The connecting bolts and nuts of the grinding roller device should be carefully inspected before and after use to see if there is any looseness and if the lubricating oil is sufficient.
The grinding roller device needs to be replaced when it has been used for more than 500 hours. When replace the grinding roller, each rolling bearing in the roller sleeve must be cleaned, and the worn parts should be replaced in time. The refueling tools can be a manual refueling pump and a grease gun.
Bearings are lubricated with No. 1 MOS2 grease or ZN-2 sodium soap grease.
Add oil to the grinding roller bearings every shift, add oil to the center bearing of the main machine every 4 shifts, and add oil to the blower bearings every month.
The maximum temperature rise in the bearing chamber should not exceed 70 ℃. If the bearing is found to be overheated, the bearing and its accessories should be removed and cleaned.
As one of the leading manufacturers of Raymond mill in China, ZENITH has different types and models of Raymond mills for customers to choose, such as suspension roller Raymond mill, vertical Raymond mill, R-type Raymond mill, etc.,
Raymond mill has outstanding advantages and strong applicability, and its market share has been high. If you want to know more about Raymond grinding mill, do not hesitate to contact ZENITH!
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