Zircon rough selection experiment is a commonly used method for separating and purifying zirconium ore. Its main principle is to use the differences in physical and chemical properties between zirconium ore minerals and other minerals to separate zirconium ore from other minerals through a series of operational steps, thereby achieving the goal of purifying zirconium ore. This article will introduce the detailed steps and precautions of the zircon rough selection experiment.
1、 Experimental materials and equipment
1. Zircon sample: Zircon is a kind of Silicate mineral containing zirconium, usually gray or brown, with hardness of 7.5 and specific gravity of 3.2-3.4. Zircon ore samples should be ground and screened to remove impurities such as clay.
2. Water: A large amount of water is required in the experiment, and it is recommended to use deionized or purified water.
3. Acid base reagent: Concentrated hydrochloric acid, sodium hydroxide and other reagents are needed in the experiment.
4. Experimental equipment: mortar, sieve, beaker, test tube, pipette, Magnetic stirrer and other equipment are needed in the experiment.
II. Experimental Steps
1. Grinding and screening: Grind the zircon ore sample into fine powder and sieve it to remove impurities such as clay.
2. Water washing: put the milled zircon ore sample into a beaker, add a large amount of water, mix it with a Magnetic stirrer to fully disperse the ore sample, then pour out the water, repeat the water washing several times until the ore sample is clean.
3. Pickling: put the washed zircon ore sample into a beaker, add concentrated hydrochloric acid, and stir with a Magnetic stirrer to make the ore sample fully react with hydrochloric acid, and remove oxides and impurities on the mineral surface. Then pour out hydrochloric acid and repeat pickling several times until the surface of the ore sample is smooth.
4. Alkali washing: put the acid washed zircon ore sample into a beaker, add sodium hydroxide solution, and stir it with a Magnetic stirrer to make the ore sample fully react with sodium hydroxide to remove residual acid and impurities. Then pour out the sodium hydroxide solution and repeat the alkaline washing several times until the surface of the ore sample is smooth.
5. Water washing: put the alkali washed zircon ore sample into a beaker, add a large amount of water, mix with a Magnetic stirrer to fully disperse the ore sample, then pour out the water, and repeat the water washing several times until the ore sample is clean.
6. Drying: Place the washed zircon ore sample into a dryer and dry it to a constant weight using a low-temperature drying method.
3、 Precautions
1. During the experiment, attention should be paid to safety and avoid acid and alkali reagents splashing onto the skin and eyes.
2. The water used in the experiment should be deionized water or purified water to avoid the influence of impurities in the water on the experimental results.
3. During the experiment, the time and operating methods of each step should be strictly controlled to ensure the accuracy and reliability of the experimental results.
After the experiment is completed, the experimental equipment should be cleaned in a timely manner to avoid the impact of residues during the experiment on the next experiment.
summary
Zircon rough selection experiment is a commonly used method for separating and purifying zirconium ore. Its operating steps include grinding and screening, water washing, acid washing, alkali washing, water washing, and drying. During the experiment, attention should be paid to safety, using pure water, and strictly controlling the time and operating methods of each step to ensure the accuracy and reliability of the experimental results.
