Mineral separation system and technique of iron-containing sea sand

Abstract

The invention belongs to the technical field of iron ore beneficiation and particularly relates to a mineral separation system and technique of iron-containing sea sand. The mineral separation system of the iron-containing sea sand comprises a sorting system, a dewatering system and a dressing ship. The mineral separation technique comprises the steps that through an iron-containing sea sand pump, iron-containing sea sand pulp sucked from the seabed is fed into a first-stage magnetic separator; after first-stage magnetic separation is conducted through the first-stage magnetic separator, tailings and first-stage concentrate are obtained; first-stage concentrate pulp automatically flows into a second-stage magnetic separator, and tailings and second-stage concentrate are obtained after second-stage magnetic separation is conducted; and the tailings of the first-stage magnetic separation and the tailings of the second-stage magnetic separation flow back to the sea automatically, second-stage concentrate pulp automatically flows into the dewatering system, an iron ore concentrate product with the water weight being smaller than or equal to 8.5% is obtained, and the iron ore concentrate product is fed into an iron ore concentrate transport ship and carried back to the land for utilization. The mineral separation system and technique are simple, the dressing ship can conduct mobile operation in the sea area where the iron-containing sea sand is located, the transportation cost is greatly reduced, the operation cost is low, the iron grade can be improved to 50% or above, and the recovery rate of magnetite sea sand iron can reach 70% or above.

Description

technical field [0001] The invention belongs to the technical field of iron ore beneficiation, and in particular relates to a beneficiation system and a beneficiation process of iron-containing sea sand. Background technique [0002] The seabed in some sea areas, such as the seabed in some sea areas of Indonesia, is rich in iron-bearing sea sand resources, some of which have a high iron grade, reaching 30%-50%, if these iron-bearing sea sand can be Utilizing it can greatly alleviate the plight of the shortage of onshore iron ore resources in my country. There are two main problems in the utilization of iron-bearing sea sand iron ore resources: [0003] 1. The concentrators of iron ore are all on land. It is necessary to transport the iron-bearing sea sand resources to the concentrator on land for beneficiation in order to obtain qualified iron ore concentrate, and the transportation cost is very high. [0004] 2. The iron-containing sea sand pumped up from the seabed is a s...

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Problems solved by technology

[0003] 1. Iron ore concentrators are all on land, and iron-bearing sea sand resources need to be transported to land concentrators for beneficiation in order to obtain qualified iron ore concentrates, and the transportation costs are very high

[0004] 2. The iron-containing sea sand pumped up from the seabed is a seawater slurry with a low concentration. When transporting by sea, it is equivalent to transporting seawater together. Not only will the seawater gather on the inclined side after the hull tilts in the wind, it is easy to capsize the ship, and increase Reduced ineffective transportation energy consumption and greatly increased transportation costs

[0005] It can be seen from the above that the high transportation cost and safety problems during transportation restrict the utilization of iron-bearing sea sand resources. Therefore, it is necessary for us to develop a simple and effective process that can greatly reduce transportation costs without affecting navigation safety. Iron-bearing sea sand beneficiation system

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