Raymond mill processing potassium feldspar

Publication time：2025-06-25
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What is potassium feldspar?

Potassium feldspar (KAlSi₃O₈) has a Mohs hardness of 6 - 6.5 and a density of approximately 2.5 - 2.6 g/cm³. It is usually flesh - colored, light yellow, or white, and a few are gray - green. It is a type of feldspar. Its main components include potassium (K), aluminum (Al), silicon (Si), and oxygen (O), with a small amount of sodium (Na). It belongs to the potassium - containing aluminosilicate minerals. It is widely present in nature, is a common mineral in the earth's crust, and is abundant in rocks such as granite.

Application of Raymond Mill in Processing Potassium Feldspar

Raymond mill is a high-efficiency powder grinding equipment, suitable for grinding potassium feldspar into fine powder with a fineness of 80 - 400 mesh, meeting the needs of industries such as ceramics, glass, and coatings.

Ceramics and glass industries: The fineness of potassium feldspar powder is required to be above 325 mesh, and the Fe₂O₃ content should be less than 0.2%. Fine particle size can ensure a uniform texture of the green body and a smooth and flat glaze surface. Controlling the iron content can prevent the appearance of color spots on products and affect transparency.

Filler industry: High whiteness (＞90%) of potassium feldspar powder is required, and impurities need to be removed through acid washing or flotation. High whiteness can reduce the impact on the color of products, and impurity removal can improve purity and whiteness.

Agricultural industry: Potassium feldspar powder is required to be coarse powder (80 - 200 mesh) and needs to be activated. Coarse powder can achieve long-term and stable supply of potassium elements, and activation treatment can increase the release rate and utilization rate of potassium elements.

Potassium feldspar and potassium feldspar powder.webp

Potassium feldspar and potassium feldspar powder

Process of Processing Potassium Feldspar by Raymond Mill

Crushing: The raw potassium feldspar ore exists in block form and needs to be coarsely crushed to particles of ≤30mm by a crusher. If the particles are too large, it will reduce the grinding efficiency and wear the equipment.

Moisture Control: The moisture content needs to be less than 6%. Excessive moisture will cause the material to stick together, affecting the fineness and output of the finished product. If it exceeds the standard, it needs to be dried.

Impurity Removal: Potassium feldspar often contains impurities such as iron, which affect its application performance. These impurities can be removed through magnetic separation or washing.

Grinding: The main machine is the core component, which crushes the material through the centrifugal rolling of the grinding rollers. The plum blossom frame rotates at a high speed, and the grinding rollers revolve and rotate, generating centrifugal force to roll the potassium feldspar. The shovel scoops up the material and scatters it on the grinding ring to ensure full grinding.

Classification: The classifier controls the fineness of the finished product by adjusting the rotation speed. Coarse particles fall back for further grinding, while fine particles enter the collection process. The fineness can be flexibly adjusted between 80 - 400 meshes.

Collection: Qualified powder enters the cyclone collector, where the powder is separated by centrifugal force. The exhaust gas is treated by a pulse dust collector before being discharged. The main machine, classifier, and powder collector cooperate closely to form an efficient grinding and classification system.

Subsequent Treatment: Granulation or modification treatment can be carried out according to requirements. Granulation is suitable for the production of agricultural slow - release potassium fertilizers, which can improve the fluidity and dispersibility of the material. Modification treatment can enhance the compatibility and functionality of potassium feldspar powder in industries such as coatings and plastics.

Precautions for processing potassium feldspar with Raymond mill

Roll wear: Potassium feldspar has high hardness, which causes significant wear to the grinding rolls during grinding. High - chromium alloy grinding rolls can be selected. They have excellent wear resistance and hardness, and their service life can be extended several times. Ceramic linings can also be used. They have high hardness, good wear resistance, and excellent chemical stability, which can reduce wear.

Inadequate fineness: Improper rotational speed of the classifier and unbalanced air volume are the main reasons. The rotational speed of the classifier can be adjusted, and fine - tuning can be carried out according to the target fineness. Optimize the air volume of the fan. Control the air volume by adjusting the opening of the damper, and install an air volume monitoring device for real - time monitoring.

Decrease in output: Excessively large feed particle size or high moisture content will lead to a decrease in output. It is necessary to strictly control the particle size and moisture of the raw materials. Use an appropriate crusher, regularly check its working status, and dry the raw materials with excessive moisture.

Iron impurity contamination: Equipment wear and iron contained in the raw materials themselves are the causes of contamination. Magnetic separation is required before feeding. Equipment such as permanent - magnet drum magnetic separators and high - gradient magnetic separators can be used. The pipelines should be made of stainless - steel material to reduce the introduction of iron impurities.

Summary

Raymond mill can process potassium feldspar into fine powder with a fineness of 80 - 400 mesh, meeting the industry's needs. During processing, strict control should be exercised over the particle size, moisture, and impurities of the raw materials. Magnetic separation and classification are carried out to optimize the quality. In view of its high hardness, selecting wear - resistant grinding rollers and taking measures to prevent iron contamination can improve the equipment lifespan and product quality. Granulation or modification according to the application scenarios can expand its industrial value.