What is the role and principle of fine screening?

With the continuous development and implementation of policy fine material steel industry, fine screening process is a black gold beneficiation plants are generally widely used. It has developed rapidly, and the taste of concentrates has been greatly improved after using fine sieves. At present, the domestic fine magnetic separation plant iron concentrate taste, due to the use of fine screening process have reached more than 66%, and some have reached 68%, reaching the world's advanced level.

Due to the improvement of iron concentrate taste, it plays an important role in strengthening blast furnace production and reducing coke consumption. Fine screening has also proven to be an effective means of preventing over-crushing and improving sorting operations in plant selection applications. Therefore, some non-ferrous metal ore (such as copper , lead , zinc , tungsten, tin ) can also be applied in the grinding cycle.

The working principle of fine screening is not complicated. See Figure 6 for the working principle of fine screening:

When the slurry flows through the sieve surface, gravity stratification occurs, which is favorable for enrichment and classification. At the same time, the fixed sieve strip produces a mechanical “cutting” effect on the flowing pulp, and the bottom and the fine and fine ore are The ore particles "cut" from the vertical direction of the slurry flow are referred to as undersize products. The coarse and light ore particles that are not "cut" flow down into the sieve product. Due to the above principle of operation, the size of the undersize particles is not equal to the size of the mesh and is approximately equivalent to the horizontal projection of the mesh size.

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