Gravity separation method for yellow tin placer ore

Gravity separation method for yellow tin placer ore

Yellow tin placer is a common mineral resource, mainly composed of tin oxide and quartz. The mining and processing of yellow tin placer ore is of great significance for the production of tin. However, the separation of tin oxide and quartz in yellow tin placers is often difficult, so it is necessary to use certain gravity separation methods to improve the beneficiation effect. This article will introduce an effective method for gravity separation of yellow tin placer ore, hoping to provide assistance to relevant practitioners.

1、 Physical and chemical properties of yellow tin placer ore

The main components of yellow tin placer ore are tin oxide and quartz, and their physical properties are as follows:

1. Density: The density of tin oxide is 7.1-7.5g/cm ³， The density of quartz is 2.65g/cm ³。

2. Hardness: The hardness of tin oxide is 6-6.5, and the hardness of quartz is 7.

3. Color: The color of tin oxide is yellow or brown, while the color of quartz is transparent or white.

4. Magnetism: Tin oxide is non magnetic, and quartz is also non magnetic.

2、 Gravity separation method for yellow tin placer ore

The gravity separation method of yellow tin placer mainly includes three steps: gravity separation, flotation, and magnetic separation.

1. Reselection

Gravity separation is the first step in separating tin oxide and quartz from the original ore. In the process of gravity concentration, gravity concentration method is usually used, that is, the density difference of minerals is used for separation. The specific steps are as follows:

(1) Roughly crushing the original ore to obtain coarse ore.

(2) The coarse ore is screened through a screening machine to obtain ores with different particle sizes.

(3) The ores with different particle sizes are subjected to gravity separation using a gravity concentrator to separate tin oxide and quartz.

2. Flotation

Flotation is the step of further separating the re selected tin oxide. In the flotation process, air flotation is usually used, which utilizes the difference in affinity between minerals and bubbles for separation. The specific steps are as follows:

(1) Fine grind the selected tin oxide to obtain fine ore.

(2) Float the fine ore through a flotation machine to separate tin oxide from quartz.

3. Magnetic separation

Magnetic separation is the step of further removing impurities from the flotation of tin oxide. In the magnetic separation process, the magnetic differences of minerals are utilized for separation. The specific steps are as follows:

(1) After flotation, the tin oxide is ground by a grinding machine to obtain fine ore.

(2) Fine ore is magnetically separated through a magnetic separator to remove magnetic impurities from tin oxide.

3、 Summary

The gravity separation method of yellow tin placer ore is an effective method for separating tin oxide and quartz. This method mainly includes three steps: gravity separation, flotation, and magnetic separation, each with specific operational steps. In actual production, appropriate beneficiation methods should be selected based on the physical and chemical properties of the ore and the requirements of beneficiation technology to improve beneficiation efficiency and economic benefits.

Gravity separation method for yellow tin placer ore