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Heavy Liquid
Heavy Liquid
Heavy liquid is a high-density liquid Liquid, which is used to determine the specific gravity of mineral particles or to separate minerals with different specific gravity.
The specific gravity of various heavy fluids ranges from about 2.5 g/cm3 to about 4.25 g/cm3. Many solutions and compounds can be used to prepare heavy solutions. The three most commonly used heavy liquids have maximum density at room temperature (g/cm3), bromoform 2.89, diiodomethane 3.31, and Crelich liquid, which is an aqueous solution of thallium formate.
By soaking a small piece of mineral in heavy liquid, you can measure its specific gravity to see whether the mineral floats or sinks in the heavy liquid. If it floats, it means that the specific gravity of the heavy liquid is greater than that of the mineral. Dilute the heavy liquid until the mineral pieces stop (suspended), neither rising nor falling. At this time, the specific gravity of the mineral and the heavy liquid are equal, and the specific gravity of the heavy liquid is It can be measured using a Victorinox scale. Bromoform and diiodomethane must be diluted with an organic solvent, such as acetone or benzene. Crelich's solution must be diluted with water.
It is also very easy to use heavy liquid to separate mechanical mixtures of minerals. If the specific gravity of the two mineral components is known, adjust the specific gravity of the heavy liquid to an intermediate specific gravity and separate the mineral mixture. When immersed in it, substances with greater specific gravity sink directly, while minerals with smaller specific gravity rise.