Tungsten ore also known as wolfram ore is an important ore that contains tungsten. Tungsten is widely used in industry, especially in the fields of hard-wearing materials, high-temperature alloys, and special steels, as well as a special transformer material. Lithium and cobalt-based alloys, etc. are also widely used in aerospace, military and other fields. Tungsten minerals and their inclusions have a wide range of certain radioactive elements, and the excessive release of radionuclides through ore processing may result in environmental pollution. Therefore, the selection of tungsten ore should pay attention to the prevention and control of environmental pollution.
Tungsten ore sorting mainly refers to the selection of tungsten ore after it has gone through the grinding process. The size of the ore suggested for grinding should meet the requirements of different beneficiation processes, so that the grinding efficiency can be improved and the production cost can be reduced.
The main process of tungsten ore sorting includes: coarse crushing, grinding, separation of mud, inspection, sieving, selection and production, etc.
1. Coarse crushing
The particle size of the tungsten ore directly affects the selection index, and the coarse crushing process is the primary process to reduce the particle size. Generally, the commonly used coarse crushing equipment is the jaw crusher or the cone crusher. The European version of the jaw crusher or impact crusher can be used as primary crushing, and then to secondary crushing with cone crusher or impact crusher, so that a reasonable crushing process can be formed. The particle size of the product after coarse crushing is generally 20mm or less.
2. Grinding process
The grinding process of tungsten ore refers to the selection of grinding equipment according to the actual ore properties, combined with the size of the ore particle size. Generally, the ball mill is selected, and the particle size of the mineral material after grinding should meet the requirements of the beneficiation process.
3. Separation of mud
In the process of grinding, a large amount of mud often mixes in the ore. In order to make it easier to sort the mud, it should be separated first. Generally, the cyclone is used for separation. The separated mud can be discharged directly or used as the cushion of the jig.
4. Inspection
In order to observe the particle size of the ore after grinding, the ore can be sampled, and then divided by the inspection sieve. Observe the particle size composition of the ore, recognize the particle size of the ore that should be selected, and then carry out the selection.
5. Screening
Screening refers to the stage of separating the materials in the tungsten ore. According to the actual situation and ore properties, a variety of selection methods can be used, such as gravity selection, flotation selection, magnetic selection, and electricity selection.
6. Selection and production
In the selection process, the selection equipment and its model should be determined according to the specific ore properties and the particle size composition of the ore. After selection, the qualified products should be sorted for shipping.
In summary, Tungsten ore sorting mainly includes the following steps: coarse crushing, grinding, separation of mud, inspection, sieving, selection and production. In the process of sorting tungsten ore, different beneficiation processes should be selected according to the ore properties, and the process should pay attention to environmental protection to ensure the safety of production.
