Process flow for selecting zircon sand

Process flow for selecting zircon sand

Zircon sand is a high-quality refractory material with characteristics such as high melting point, high hardness, high strength, and corrosion resistance. It is widely used in fields such as metallurgy, construction, and chemical engineering. The process of selecting zircon sand is an important link in the production of zircon sand, which directly affects the quality and cost of zircon sand. This article will introduce the process flow of selecting zircon sand for everyone to better understand the production process of zircon sand.

1、 The beneficiation principle of zircon sand

Zircon sand is a natural mineral mainly composed of zirconia (ZrO2) and silicon dioxide (SiO2). The dressing principle of zircon sand is to separate according to the density difference between zirconia and silica. Generally speaking, the density of zirconia is 5.6-6.0g/cm ³， And the density of silica is 2.65g/cm ³， Therefore, in the beneficiation process, zirconia and silica can be separated through methods such as heavy medium separation, gravity separation, flotation, etc.

2、 The beneficiation process flow of zircon sand

1. Heavy medium sorting

Heavy medium separation is the first step in zircon sand beneficiation, and its main function is to separate zirconia and silica from the sand. The principle of density difference is adopted for heavy medium separation. Through separation in heavy medium, zirconia with high density settles to the bottom, while silica with low density floats on the top. The commonly used heavy media are styrene, toluene, heavy iron ore, etc.

2. Reselection

Gravity separation is the second step in zircon sand beneficiation, and its main function is to further improve the grade of zirconia. Gravity separation uses physical beneficiation methods, which separate zirconia and silicon dioxide through equipment such as vibrating screens and cyclone separators. In the process of gravity separation, it can also be separated according to the Color difference between zirconia and silica.

3. Flotation

flotation is the final step in zircon sand beneficiation, and its main function is to improve the recovery rate of zirconia. Flotation uses chemical beneficiation methods, which increase the difference in buoyancy between zirconia and silica under the action of flotation reagents, thereby resurfacing zirconia. Common flotation reagents include Sodium dodecyl sulfate, hexadecyl trimethyl Ammonium bromide, etc.

3、 Quality control of zircon sand

Although the process of selecting zircon sand is important, quality control is equally important. In the production process, it is necessary to strictly control the grade, Granularity, impurity content and other indicators of zircon sand to ensure the quality of zircon sand. Common quality control methods include chemical analysis, Granularity analysis, microscope analysis, etc.

4、 Conclusion

The process of selecting zircon sand is an important link in the production of zircon sand, which directly affects the quality and cost of zircon sand. By using processes such as heavy medium separation, gravity separation, and flotation, zirconia and silica in zircon sand can be separated, improving the grade and recovery rate of zirconia. Meanwhile, during the production process, it is necessary to strictly control the quality of zircon sand to ensure that it meets the application requirements.

Process flow for selecting zircon sand