A dry-wet circulation magnetic separation method

Abstract

The invention discloses a dry and wet type cyclic magnetic separation method. A dry type magnetic separation method comprises the steps of a, grinding ores; b, performing pre-screening; c, performing reducing roasting; d, feeding materials; e, performing magnetic separation through an upper magnetic separation barrel; f, enabling the upper magnetic separation barrel to rotate to clean a storehouse; g, performing magnetic separation through a lower magnetic separation barrel; h, enabling the lower magnetic separation barrel to rotate to clean the storehouse; i, performing cyclic reciprocating magnetic separation; and j, rotating to discharge slag. A wet type magnetic separation method comprises the steps of a, cleaning impurities; b, performing filtering and pre-screening; c, feeding materials; d, performing magnetic separation through an upper magnetic separation barrel; e, enabling the upper magnetic separation barrel to rotate to clean a storehouse; f, performing magnetic separation through a lower magnetic separation barrel; g, enabling the lower magnetic separation barrel to rotate to clean the storehouse; h, performing cyclic reciprocating magnetic separation; and i, rotating to discharge slag. The device adopts a unique double-barrel circulating structure; when the circulating structure rotates to different positions under the driving of a driving device, river sand or metal mortar can be cyclically separated between the two hollow barrels. The whole process of the method is automatically controlled by a circuit, so that the waste of human resources is reduced, and the problems that a separation method is complicated, a separation process is long and the like are solved.

Description

technical field [0001] The invention relates to a magnetic separation method for ore dressing, in particular to a dry-wet circulation magnetic method for selecting iron ore from river sand, ore pulp, or a mixture or mixture of non-metallic fine particles and iron impurities, and removing iron impurities. Choose method. Background technique [0002] Magnetic separation is the main beneficiation method for iron ore. After metal ore, especially iron ore, has been beneficiated, the grade has been improved and the impurity content has been reduced, which is beneficial to the smelting process. According to our country's practice, every 1% increase in iron concentrate grade can increase the blast furnace utilization factor by 2% to 3%, reduce coke consumption by 1.5%, and reduce limestone consumption by 2%. Many non-ferrous and rare metal minerals have different magnetic properties. When the final concentrate cannot be obtained by gravity separation and flotation, magnetic separ...

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Problems solved by technology

[0008] In order to overcome the defects of the existing wet and dry magnetic separators, the purpose of the present invention is to provide a kind of magnetic separation capable of circulation, which can improve the utilization rate of the mixed solution or mixture of non-metallic fine particles and iron impurities in river sand and ore pulp, and the mineral The circulation channel is simple and not easy to block, and can meet the requirements of dry and wet magnetic separation. It is a dry-wet cycle magnetic separation method for closed processing of feed materials. Disadvantages such as ease of management

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