Raymond mill, also known as Raymond grinding mill or pendulum Raymond mill, is a pioneer in industrial grinding equipment. After years of practice and continuous improvement, its structure has become increasingly perfect. The improved Raymond mill can be used as a substitute for ball mill equipment to a certain extent, and can be widely used in metallurgy, building materials, chemicals, mines and other good areas. It is suitable for processing various non-flammable and explosive ores with Mohs hardness below 7 and humidity below 6%, such as gypsum, talc, calcite, limestone, marble, potassium feldspar, barite, dolomite, granite, kaolin, medical stone, bauxite Iron oxide red, iron ore, etc.
According to industry regulatory authorities, the market share of Raymond grinding mill in domestic grinding equipment is over 70%. However, as production progresses, there may be a decrease in powder yield, which affects production efficiency.
Here are 8 effective ways to improve the powder yield of Raymond grinding mill.
1, reasonably design the rotate speed of driving shaft, improve the grinding force of the main engine
The grinding pressure mainly comes from the centrifugal force of the grinding roller, and the speed of the main engine directly affects the grinding force.
Analysis: Low speed of the driving shaft may be one of the reasons for low powder yield. Lack of power, loose transmission belt or serious wear will cause the instability and deceleration of rotation speed of driving shaft. It is suggested to increase the kinetic energy of the Raymond grinding mill, adjust the belt or replace it.
2, adjust the air pressure, air volume of air blower reasonably
Due to the huge differences of physical properties and chemical composition of all kinds of non-metallic minerals, the air pressure, air volume of the air blower should be adjusted according to the situation.
Analysis: if the wind pressure and air volume is too large, it can easily cause coarse particles to mix into the finished product, resulting in unqualified products; if the wind pressure and air volume is too small, there may be material blockage inside the host, making the grinding mill cannot operate normally.
Therefore, we should reasonably adjust the air pressure and air volume according to the raw material.
3, Selection of wear-resistant materials for shovels, grinding rollers, and grinding rings
The severe wear of main grinding vulnerable parts such as shovels, grinding rollers, and grinding rings can affect the powder yield. Therefore, it is necessary to choose wear-resistant parts made of high wear-resistant materials, such as high chromium cast iron.
Analysis: The shovel cannot lift the material, and the grinding roller and ring are severely worn, resulting in poor grinding effect, which leads to low powder processing rate.
In this case, operators should change the wearing parts in time.
4, The air duct of the grinding mill is blocked
Blockage of the air duct of the grinding mill will cause the powder to be unable to be transported normally, and lead to low or even no powder production. To solve the problem, it is necessary to shut down the machine to clear the materials in the pipeline and restart the machine for feeding.
Suggestion: The ultrafine powder contained in the material has large agglomeration effect, and small loose specific gravity, large volume, and is easy to adhere to the pipe wall and the silo wall, making it difficult to fall. Therefore, the inner walls of the pipeline and silo should be as smooth as possible.
5, poor pipeline seal will cause dust increase, negative pressure imbalance, low powder delivery rate
The sealing of the pipeline needs to be checked in place before production.
Suggestion: The powder locking device at the discharge port of the Raymond grinding mill production line was not adjusted to the correct state, resulting in poor sealing and suck-back of powder. It is necessary to ensure that the powder locking device, return air pipe valve, and other valves on the pipeline are in good working condition.
6, Pay attention to humidity, viscosity, hardness, etc. of the raw material
Refer to the specifications and instructions of the grinding mill, and only in accordance with the corresponding requirements can the equipment achieve the ideal production effect.
Analysis: The performance of the equipment itself is the main factor that determines the production efficiency, but the properties of the material, such as humidity, viscosity, hardness, discharge particle size requirements, will also affect the yield of powder.
7, Blades of the analyzer wear
Under long-term operation, the blades of the analyzer will be worn, leading to the material cannot be effectively classified. For example, discharged powder will be too coarse or too fine, which will affect the powder yield of the grinding mill.
Suggestion: Check the blades of the analyzer machine regularly, replace worn ones in time.
8, the feeding volume is too little leads to a decrease in production
Suggestion: Check the feeding amount of the grinding mill and increase the supply of the feeding device to the appropriate range.
The Raymond mill is important grinding equipment with a high application rate in grinding industry, and its powder yield and quality directly affect the production efficiency of the entire production line.
In the production process, operators can check the above 8 methods to improve the production capacity. Or if you have any other problems, feel free to contact SBM! We have professional engineers 24/7 hours online to help customers!
In addition to the above mentioned Raymond grinding mill, SBM also provides other types of grinding mills for customers to choose, such as MTM series, MTW series and MRN series hanging roller mill, LM series and LUM series vertical roller mill, SCM series ultrafine mill etc. If you want to know more about these grinding mills, please contact SBM for more information.