A beneficiation method for dry separation and recovery of iron-bearing useful rocks

Abstract

The invention discloses a beneficiation method for dry separation and recovery of iron-containing useful rock. An adopted dry separation recovery system is composed of an iron-containing useful rock dry separation recovery system material receiving part and an iron-containing useful rock dry separation and recycling dry separation part in a combined mode; a movable trolley (15) is arranged in thethrough-connection position of an original mining plant main adhesive tape (4) and an original soil-discharging field main adhesive tape (13); a vertically arranged rock-discharging chute (3) is arranged at the back end of the movable trolley (15); a vertically arranged dry separation chute (7) is arranged at the front end of the movable trolley (15); the iron-containing useful rock dry separationand recycling dry separation part comprises a material collecting type three-way material division funnel and two dry magnetic separators; a turn plate is arranged in the crotch of the material collecting type three-way material division funnel, and an electric hydraulic push rod pushes the turn plate; and the position of the movable trolley (15) is adjusted through a double-winding drum winch (1), so that different-grade iron-containing surrounding rocks can be treated in different ways. The method can adapt to different ore feeding conditions and can automatically switch the processing modes according to the high and low iron grade in the iron-containing surrounding rock feed.

Description

technical field [0001] The invention belongs to the technical field of iron ore beneficiation. It specifically relates to a method for sorting and separating low-grade magnetite-containing surrounding rocks, which is especially suitable for the intersection of ore and rock in open pits. The comprehensive utilization of 2-6% magnetite-containing surrounding rocks can be widely used in the separation of iron-containing surrounding rocks in magnetite mines. Background technique [0002] At present, some iron mines in China have a certain amount of excavated rocks. Since the excavated rocks cannot reach the required grade of the concentrator, some iron-containing surrounding rocks are piled up in the dump without being utilized, resulting in a waste of a lot of resources. With the development of the domestic metallurgical industry, there is a large demand for mineral resources, and the mining capacity continues to increase. The stripping ratio of mines increases year by year, a...

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Problems solved by technology

Although the above two utilization methods partially utilize the iron-containing surrounding rock to make it "turn waste into treasure", there are problems of one kind or another. For example, the technology of "directly used as concrete aggregate or railway ballast" does not comprehensively recycle iron-containing The iron ore resources in the magnetite surrounding rocks have caused a waste of iron ore resources; while in the rock drainage system "using dry magnetic separation to recover iron ore", it belongs to "recovering a little bit", and the dry separation of concentrated minerals The recovery rate is only about 5%, and a large amount of waste rock passes through the dry separation system. Due to the electricity bill and equipment depreciation, the overall recovery cost is relatively high

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