Quartz sand is a non -metallic mineral, which has a wide range of uses. It is used in traditional fields such as glass products, building materials, waterproof and anticorrosive materials and high -tech industries (such as: electronic materials, fiber communication, SIO2 film materials, etc.). Among them, the high -tech industry is an emerging industry with high development prospects, but the purity requirements of quartz sand in this field are very harsh. Generally, the SIO2 content is greater than 99.99%. Quarted sand removal is necessary.

At present, common quartz sand removal methods are

Mechanical scrubbing iron method

As well as

Magnetic selection

Floating and iron removal method

Sore iron removal

Wait.

1. Quartz sand mechanical scrubbing iron method

Mechanical scrubbing method is mainly

With the help of mechanical external forces and the method of collision and friction between minerals

Remove the film iron on the surface of quartz sand

and

Iron -containing minerals that are attached to the surface of quartz sand

Essence There are two ways of scrubbing, one is

Mechanical scrub

The other is

Battle rubbing method

The scrubbing concentration of the general sand mine is

50%~ 60%

The effect is appropriate. The scrubbing time (in principle) is based on the initial reaching product quality requirements. It should not be too long, otherwise the equipment will be worn over.

this method

It is necessary

With reasonable craftsmanship and equipment, the effect is better. Among them, the pharmaceutical agent can increase the reputation of impurities and quartz surfaces, thereby strengthening the separation between the two.

This iron removal method allows the final product to meet the quality requirements of high -quality silicon sand, with good quality and large output.

2. Magnetic selection of quartz sand removal method

The quartz is a non -magnetic mineral, which is not easy to be magnetized in the magnetic field. Most of the iron impurities (red iron, magnets, brown iron, knitting iron ore, etc.) are magnetic minerals and can be magnetized. Therefore, the magnetic selection method is mainly used to remove these iron impurities minerals in quartz sand.

Magnetic selection of quartz sand can be divided into

Wet magnetic selection

Dry magnetic selection

Two methods.

Wet magnetic selection method:

For weak magnetic minerals (such as red iron ore, brown iron ore, and black cloud mother, etc.), a wet -type strong magnetic selection machine can be used above 10,000 Oster to clearly remove impurities (including linked bodies) impurities. The more times, the finer the granularity of the quartz sand, and the better the effect. However, the power consumption of the wet -type strong magnetic selection machine is large, easy to wear, high cost, and the water consumption is large during the production process.

For strong magnetic iron ore (magnetite), it is suitable for removing mixed with weak magnetic or medium magnetic machines, and the effect is better.

Dry magnetic selection method:

Most of the dry magnetic machines are used for removing miscellaneous, its process operation is convenient, and the operation and maintenance costs are lower than that of wet magnetic selectors.

3. Quartz -choice of quartz sand removal method

The method of flotation of quartz sand is used

Hydrofluoric acid is a activator

, Under strong acidity (pH2 ～ 3), use

Floating

Essence When floating iron, NaOH can be used to inhibit quartz activated by metal ions. Methods can be divided into fluoride, fluoride, non -fluoride, and fluoride -free.

There is fluoride and acidic method:

This method is easy to control and flotal, and the flotation indicators are more stable, but the existence of fluoride ions has caused great damage to the surrounding land and environment.

Fluorofluoric acid method:

This method has stable production indicators and has no harm to the surrounding land and environment, but due to strong acid and strong corrosiveness, it requires high requirements for flotation machines.

Fluorofluoro and no way:

Under the conditions of natural pH, this method creates a unique high -concentration slurry flotation environment through the reasonable deployment of the yin and yang ion catcher to achieve the purpose of priority flotation of impurities minerals. However, this method has high requirements for the treatment of the original sand and the environment of the slurry, and the current application is not wide.

4. Metrochinic acid immersion method

Quarter sand is insoluble in acid (except hydrogen fluoride), while iron -containing impurities can be dissolved by acid. Basically, the characteristics of acid immersion can effectively remove iron impurities from quartz sand. In addition, non -metal impurities in use can be removed. Common acid immersion methods include sulfuric acid, hydrochloric acid, nitric acid, and hydrofluoric acid.

Generally, the harmful ingredients in quartz sand exist in the form of mineral sets. The effect of single acid immersion is not good, and most of them are used in mixed acid immersion.

It should be noted that the ratio, additional order, temperature, acid immersion time, mineral particle size, and mix of mowing mixing will have a great impact on the removal of impurities minerals.

The above are several common quartz sand removal methods. In addition, there are microbial methods and ultrasonic methods. No matter what kind of iron removal method, it is necessary to decide Therefore, if you want to choose the iron removal process suitable for your own mining plant, you need to conduct a mineral selection test, and you can obtain the ideal technology and economic benefits through the experimental results.

The picture is from: Xinhai Mine, please indicate the source when reprinting!

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and

Mechanical scrub

Battle rubbing method

Product Recommendation: quartz surface