A treatment method for improving the insulation performance of large-crystal magnesium oxide smelted by a floatation method

By modifying with organosilicon oil and undergoing multiple processing steps, a composite hydrophobic structure is formed, which solves the problem of easy moisture absorption in the flotation smelting of large crystal magnesium oxide, and achieves long-term stability improvement in insulation performance, meeting the insulation requirements of electric heating elements.

CN122187084APending Publication Date: 2026-06-12DASHIQIAO MEIR MAGNESIUM PROD
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DASHIQIAO MEIR MAGNESIUM PROD
Filing Date
2026-04-03
Publication Date
2026-06-12

AI Technical Summary

⚠Technical Problem

The flotation process for smelting large-crystal magnesium oxide is prone to moisture absorption and has poor insulation stability, which leads to a rapid decline in insulation performance in high humidity environments, affecting the safety and reliability of electric heating elements.

⚗Method used

By employing steps such as surface modification with organosilicon oil, high-temperature impurity removal, air classification purification, and secondary composite treatment, a composite hydrophobic structure is formed, consisting of a chemically bonded silica substrate and a cross-linked polysiloxane network, thereby improving the hydrophobicity and insulation durability of magnesium oxide.

🎯Benefits of technology

After being placed at 25℃ and 85% relative humidity for 110 days, the insulation resistance can still be stably maintained above 5×104MΩ, which significantly improves the safety and reliability of the electric heating element.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN122187084A_ABST
    Figure CN122187084A_ABST
Patent Text Reader

Abstract

The application discloses a treatment method for improving the insulation performance of large-crystal magnesium oxide smelted by a flotation method, which comprises the following steps: mixing the large-crystal magnesium oxide smelted by the flotation method with silicone oil, removing carbon impurities through high-temperature baking, then physically purifying through air separation, screening and magnetic separation, mixing the large-crystal magnesium oxide with high-hydrogen silicone oil and fumed silica, and baking at low temperature, and finally, obtaining the finished product through magnetic separation and screening again; the residual impurities are completely removed through high-temperature decarburization and physical purification, and a dense and hydrophobic network is constructed on the particle surface through chemical modification of the silicone oil; through the synergistic effect of multiple processes, the insulation resistance of the treated magnesium oxide is still stable at 5*10 4 MΩ or above, which is far higher than the industry standard, and the service life and safety of the electric heating element are greatly prolonged.
Need to check novelty before this filing date? Find Prior Art