Separation system

Abstract

The invention provides a separation system, which comprises a roller press, a flow stabilizing bin, a wind grading system, a powered screening system and dry type magnetic separation systems, and the separation system is characterized in that the separation system is arranged longitudinally. Occupied floor area is saved by the separation system, a belt conveyer does not need to be used for conveying when material flows, and thereby enormous cost and energy consumption are reduced; moreover, because water is not needed in the process of separation, water resource is saved, and the separation system can be applied to places short of water resource.

Description

Technical field: [0001] The invention relates to a mineral separation system, in particular to a mineral separation system for ferrous metals and nonferrous metals. Background technique: [0002] At present, the mature magnetite iron beneficiation technology is dry crushing + wet grinding + wet beneficiation (such as figure 1 As shown), so the occupied area is very large, the civil engineering foundation of the equipment is also very complicated, and the construction is difficult; the existing mineral separation technology needs a large amount of water for grinding and wet magnetic separation, so the water consumption is large, and the tail drainage causes water pollution. [0003] Chinese patent CN102489373B discloses an iron ore processing and beneficiation process, which generally includes the following steps: 1. Break the raw ore into coarse ore with a particle size of <30mm, and the coarse ore is sent into the hoist by the first belt conveyor; 2. Elevate The machin...

AI Technical Summary

Problems solved by technology

[0004] 1. It covers a large area. Based on the production scale of 70 tons per hour, it needs to cover an area of ​​5,000 square meters, and the transmission distance of materials is 600 meters.

[0005] 2. Since the conveying of materials is limited by the climbing angle of the belt conveyor, if the material is to be conveyed to the feed port of the next magnetic separator, the shortest length of the belt conveyor should not be less than L (calculation formula: L=h / tan(α), where: h is the minimum height of the feeding port of the magnetic separator, and α is the maximum inclination angle of the belt conveyor); at the same time, the more the number of magnetic separators, the more belt conveyors are needed, and the belt conveyor The larger the installation site, the greater the consumption of the belt

In use, the service life of the belt is about 6 to 12 months under normal working conditions, so the belt must be replaced as a whole every 6 to 12 months, which consumes a huge cost

Based on the production scale of 70 tons of processing capacity per hour, it will consume 23 kilowatt-hours of electricity per hour, which is a large energy consumption

[0007] 4. The selected magnetite has low grade and low yield

According to the dry magnetic separator of the prior art, when the grade of iron in the selected material is 10% to 15%, the grade of fine powder selected by a magnetic separation is about 30%; when the grade of iron in the selected material is 25% to 30%, the fine powder grade selected through a magnetic separation is about 40%; the output is about 40 tons; on the other hand, when the fine powder grade selected by a magnetic separation is low, those of ordinary skill in the art will think of increasing magnetic The number of separators is used to improve the grade. Although increasing the number of magnetic separations can improve the grade of fine powder, the best record of the grade of fine powder selected by dry magnetic separators in the prior art is 45% to 50%. Less than the sales grade stipulated by the national standard: iron fine powder ≥ 58% (the wet magnetic separator of the prior art can reach a grade of more than 60%); if considering increasing the number of magnetic separators, it is necessary to increase the feeding conveyor belt conveyor at the same time, and the magnetic The increase of selection machines and belt conveyors will increase the floor area, and will also increase the energy consumption and belt consumption

[0008] 5. Serious environmental pollution

A large amount of ash emission caused air pollution

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