Ямар техникүүд нунтаг кварцын элсийг үр дүнтэй цэвэршүүлдэг вэ?

2025-11-10

Purifying powder quartz sand to achieve high levels of silica purity often involves a combination of physical, chemical, and thermal techniques. The most effective techniques for quartz sand purification are:

1. Хэрмийлт ба нунтаглалт

• Quartz sand is first crushed and ground into smaller particles for subsequent purification processes. Care must be taken to minimize contamination during this step.

2. Screening and Sieving

• Mechanical methods, such as screening or sieving, separate quartz sand from coarse impurities or materials of varying sizes.

3. Соронзон тусгаарлах арга

• Magnetic separation is used to remove magnetic and paramagnetic impurities, such as iron oxides (hematite, magnetite), from quartz sand.

4. Усан дээр хөвүүрч гаргах арга

• Flotation separates quartz from impurities like feldspar, mica, and other silicate minerals using chemical reagents and surfactants. This process enhances purity.

5. Washing and Desliming

• Impurities like clay and fine particles can be removed through washing and desliming techniques. Water is used to separate finer silica grains from unwanted materials.

6. Хүчилээр уусгах

• Acid leaching is a highly effective chemical purification method that removes iron, aluminum, and other metallic impurities. Common acids used include:
  • Hydrochloric acid (HCl)
  • Sulfuric acid (H₂SO₄)
  • Oxalic acid (C₂H₂O₄)
• Controlled leaching conditions (temperature, concentration, and time) help achieve high-purity quartz.

7. Дууны өндөр давтамжийн цэвэрлэгээ

• Ultrasonic waves combined with chemical solutions can dislodge microscopic impurities from quartz surfaces.

8. Термаль боловсруулах

• High-temperature processing removes volatile and organic impurities. Thermal treatment can also reduce water content and remove hydroxyl groups.

9. High-Pressure Washing

• High-pressure washing removes fine impurities, clay particles, and adherent materials from sand particles.

10. Microbial Mechanisms

• Some specialized microorganisms can digest mineral impurities like iron-containing compounds. This biotechnological method is environmentally friendly.

11. Gravity Separation

• Gravity-based methods, such as spiral classifiers or shaking tables, can separate quartz sand from heavier mineral impurities.

12. Ion Exchange or Chelation

• Ion exchangers or chelating agents can remove trace metal impurities like aluminum and iron from quartz sand.

13. Thermal Plasma Melting

• Advanced techniques such as plasma purification use high temperatures to eliminate metal contaminants and refine quartz to ultra-high purity.

By combining multiple techniques, quartz sand can be purified effectively to meet industrial-grade or electronic-grade requirements for diverse applications, such as glassmaking, semiconductors, and solar panel manufacturing.

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