Tin ore gravity separation+roasting+magnetic separation+gravity beneficiation process

Tin ore gravity separation+roasting+magnetic separation+gravity beneficiation process

The roasting process has two main functions. Firstly, it is used to convert some difficult to select iron minerals such as siderite into easily selected iron minerals, thereby improving the magnetic separation effect and increasing the separation efficiency between iron minerals and tin minerals; The second is to remove sulfur and arsenic from ores.

process flow

1.Raw ore crushing:Crush the tin ore raw ore to a certain particle size to prepare for subsequent grinding and re selection.

2.Grinding:Grinding the crushed raw ore to achieve appropriate fineness, providing conditions for re selection and roasting.

3.First re-election:

  • Jig sorting:Coarse grade ore is sorted by gravity using a jigger to obtain coarse-grained concentrate products.
  • Shaker sorting:Fine grained ore is subjected to finer gravity sorting through a shaker to obtain a purer cassiterite concentrate.


  • Roast the cassiterite concentrate obtained from the first re selection. The roasting process has two main functions:
  • Transforming some difficult to select iron minerals such as siderite into easily selected iron minerals to improve magnetic separation efficiency.
  • Remove sulfur and arsenic from the ore, reduce the content of harmful elements, and improve the quality of the final product.

5.Magnetic Separation:Perform magnetic separation on the roasted ore, using a magnetic separator to separate magnetic minerals from non-magnetic minerals. This step can effectively improve the separation efficiency of iron minerals and tin minerals.

6.Second re-election:Perform a second re selection of the concentrate after magnetic separation, such as using a jigger or shaker, to further recover tin minerals and optimize product structure.

7.Concentrate Treatment :The concentrate obtained from the second re selection is processed through concentration, drying, and other processes to obtain the final tin concentrate and iron concentrate products.

Technological advantages

  • 1.Efficient Separation:By combining gravity and magnetic separation, effective separation of iron minerals and tin minerals has been achieved, improving the purity and quality of the product.
  • 2.Resource Recycling:This process can efficiently recover cassiterite and iron mineral resources, improving resource utilization.
  • 3.Harmful element control:The roasting process effectively removes sulfur and arsenic from the ore, reducing environmental pollution and equipment corrosion.
  • 4. Improve product quality:By converting refractory iron minerals through roasting and improving separation efficiency through magnetic separation, high-quality concentrate products are obtained.
  • 5.Flexible Adaptation :According to the different properties of the ore and the target product, the process flow can be flexibly adjusted to achieve the best beneficiation effect.
  • 6.Energy saving and environmental protection:The gravity and magnetic separation processes have relatively low energy consumption, and the roasting process can also achieve energy-saving goals. At the same time, this process reduces the generation of tailings, which is beneficial for environmental protection.
  • The tin ore gravity separation+roasting+magnetic separation+gravity separation process is an efficient, energy-saving, and environmentally friendly beneficiation method that can achieve high recovery rates of tin ore and iron mineral resources, as well as the production of high-quality products.

Typical beneficiation plant

Batlis beneficiation plant: The raw ore contains 12% -20% cassiterite, accompanied by arsenopyrite and chalcopyrite.