Technological process of tin ore beneficiation

Technological process of tin ore beneficiation

Tin ore is an important metal ore widely used in fields such as electronics, metallurgy, and chemical engineering. The beneficiation process of tin ore refers to the process of separating tin ore from the raw ore. This article will introduce the process flow of tin ore beneficiation and provide a detailed explanation of the operation methods for each step.

Classification and Properties of Tin Ores

Tin ore can be divided into quartz type tin ore, sulfide type tin ore, oxidized type tin ore, carbonate type tin ore, etc. according to its composition. Among them, sulfide type tin ore is the most common type of tin ore, and its main component is cassiterite (SnS2). The color of sulfide type tin ore is gray black or iron gray, with a hard texture and a specific gravity of 6.8-7.1g/cm ³， The melting point is 1180 ℃.

2、 The beneficiation process flow of tin ore

The beneficiation process of tin ore mainly includes steps such as ore crushing, slurry preparation, flotation separation, selection, and dehydration. The following will provide a detailed introduction to the operation methods for each step.

1. Ore crushing

Ore crushing is the first step in tin ore beneficiation, with the aim of crushing the raw ore into appropriate particle sizes for subsequent beneficiation work. Commonly used crushing equipment includes jaw crushers, cone crushers, impact crushers, etc. The crushed ore is transported to the mill through a conveyor belt for grinding.

2. Slurry preparation

Slurry preparation is the process of mixing finely ground ore with water to produce slurry. The density and viscosity of mineral slurry have a significant impact on mineral processing, so it is necessary to control the density and viscosity of the slurry based on the properties of the ore and the requirements of the mineral processing technology. Commonly used slurry preparation equipment includes mixing drums, mixers, etc.

3. Flotation separation

Flotation separation is the core step of tin ore beneficiation, with the aim of separating useful minerals such as cassiterite from waste rock. The principle of flotation separation is to use the different affinity between minerals and bubbles to float useful minerals and sink waste rocks through bubbles. Flotation separation can be divided into three stages: rough selection, sweeping selection, and selection.

(1) Rough selection

Rough selection is the first step in separating useful minerals such as cassiterite from waste rock in the slurry. Rough selection usually uses mechanical flotation, which uses mechanical force to mix bubbles and slurry, causing bubbles to adhere to the surface of useful minerals, causing them to float and waste rocks to sink. The commonly used mechanical flotation equipment includes mechanical stirring flotation machines, mechanical air lift flotation machines, etc.

(2) Scanning selection

Sweeping selection is the process of further separating the flotation concentrate from the coarse selection. Scanning is usually carried out using a flotation machine, and its principle is similar to rough selection, except that the size and number of bubbles vary. Commonly used flotation machines include mechanical airlift flotation machines, mechanical stirring flotation machines, etc.

(3) Selected

selection is the process of further purifying the flotation concentrate obtained by scanning. Selection is usually carried out using flotation or gravity machines. Commonly used flotation machines include mechanical airlift flotation machines, mechanical stirring flotation machines, etc. Commonly used gravity separators include heavy medium flotation machines, vibration flotation machines, etc.

4. Selection

Selection is the process of further purifying useful minerals such as cassiterite after flotation separation. The commonly used selection methods include gravity separation, magnetic separation, electrical separation, etc. Gravity separation is to separate minerals by using the density difference. The common gravity separation equipment includes heavy medium concentrator, vibrating concentrator, etc. Magnetic separation utilizes the magnetic differences of minerals for separation, and commonly used magnetic separation equipment includes magnetic separators, high gradient magnetic separators, etc. Electrical separation is the use of differences in the conductivity of minerals for separation, and commonly used electrical separation equipment includes electrical separators, high-voltage electrical separators, etc.

5. Dehydration

Dehydration is the process of removing water from the slurry generated during the beneficiation process. Commonly used dehydration equipment includes filter presses, centrifuges, etc.

3、 Summary

The process flow of tin ore beneficiation is a complex process that involves multiple steps and equipment. In the actual operation process, it is necessary to select appropriate equipment and process flow based on the properties of the ore and the requirements of the beneficiation process to achieve the best beneficiation effect.

Technological process of tin ore beneficiation

Technological process of tin ore beneficiationRelated Information

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