The placer gold ore washing operation

The placer gold ore washing operation includes three processes of crushing, screening and desliming. It is a very important and necessary operation before the placer gold ore is sorted. The reason why this operation is important is that it not only breaks and separates the mud and sand, but also removes the gold particles adhering to the surface of the gravel, and once a large amount of gold-free gravel can be screened out, it can be discarded directly; the general yield can be It reaches 40%-50% of the ore, and at the same time, most of the slime is removed.

In placer gold sorting, desliming, like removing large gravels, is also a very important preparatory operation. Materials less than 0.1mm in placer gold generally do not contain gold or contain very little gold. For example, gold less than 0.1mm in placer gold in Hunchun Gold Mine only accounts for 0.15%, while the same-sized ore slime accounts for 13.77% of the original ore sand. This kind of gold smaller than 0.1mm is commonly known as floating gold, which is difficult to recover during the sorting process.

In the placer gold ore dressing plant, always try to remove the slime less than 0.1mm in advance. Desliming equipment commonly used in production has desliming buckets of various specifications. However, the chute gold separation allows wide material particle size and large processing capacity, so the chute does not desilt before separation.

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The difference between quartz and mica

Mica and quartz are common minerals that play an important role in mineralogy. Although they are both silicate minerals, there are clear differences between them. First, mica and quartz are very different in appearance. One of its distinguishing features is that mica exhibits a layered structure that can be easily peeled off into thin flakes. Quartz, on the other hand, is a uniform crystal with no layered structure. Additionally, mica is usually dark in color, such as black, brown, or green, while quartz is usually clear or white. Secondly, mica and quartz also differ in their physical and chemical properties. The hardness of mica is usually between 2.5 and 4, which is relatively easy to be scratched; while the hardness of quartz is very high, 7, which is a very hard mineral. In addition, mica has good refractive properties and electrical properties, while quartz is an excellent piezoelectric material.

Slove method of the clogging of trommel screen sieve

The drum screen is a simple screening device. The trommel screen is easy to close and collect dust, the maintenance is small, the maintenance is simple, and the service life is long. It is a device frequently used in refractory materials, coal, river sand classification, and sandstone classification. The advantage of the trommel screen is that the structure is not complicated so that the device can be quickly operated, and when the trommel has problems, people can easily solve it. But what should I do when the screen of the trommel screen is blocked? The following screen will introduce several ways to solve the phenomenon of blocking the net. The trommel screen sometimes adopts a mechanism added to the fixed frame, and then the mechanism rotates to drive the belt mounted on the belt to continuously smear the surface of the sieve hole, thereby sucking out the raw material particles blocked in the sieve hole. One of the disadvantages in practice is that it produces a lot ...

The classifications of quartz sand

1. Ordinary quartz sand: The surface of ordinary quartz sand seems to have a layer of yellow skin, and some have large particles and strong fire resistance. It is a kind of quartz sand processed by the manufacturer after using natural quartz ore in the production process, such as washing and drying. No impurities can be seen in the quartz sand through the second water treatment filtration. It is the best choice for chemical water treatment. It can block the sundries suspended in the water and maintain the quality and beauty of the water. 2. Refined quartz sand: Refined quartz sand is a mineral made by the manufacturer after carefully selected quartz stone. According to different requirements of users, the range used is also different. But generally the main use of refined quartz sand is in glass products, because refined quartz sand is refractory and precision casting, especially suitable for fireproof glass materials.

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