Resource recycling method and system for steelmaking tailings

A technology of recycling and tailings, applied in the direction of grain processing, etc., can solve problems such as polluting the environment and wasting resources, and achieve the effect of solving environmental pollution and resource waste

Inactive Publication Date: 2016-12-07
杨立武
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Problems solved by technology

[0003] At present, most iron and steel enterprises will use the beneficiation process to recover part of the iron in steel slag, and produce two products: slag-rich iron ore and tailings. Among them, the slag-rich iron ore returns to the smelting sy

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  • Resource recycling method and system for steelmaking tailings

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Embodiment Construction

[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0039] In describing the present invention, it is to be understood that the terms "central", "axial", "radial", "longitudinal", "transverse", "length", "width", "upper", "lower" , "front", "back", "left", "right", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. Based on the orientation or positional relationship s...

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Abstract

The invention discloses a resource recycling method and system for steelmaking tailings. Through reasonable design, a jaw crusher, an impact crusher and a vibrating screen can be used for producing tailings with the grain diameters being of three specifications. The tailings with the grain diameters being 10mm-15mm and the tailings with the grain diameters being 4.75mm-10mm can be used as coarse aggregate in a concrete mixture. The tailings with the grain diameters being 0-4.75mm can be used as fine aggregate in the concrete mixture. The tailings with the three types of grain diameters can be further mixed into cement clinker. Steel slag fine powder is obtained through magnetic-separation with a dry separator to be returned to an iron and steel smelting system for secondary smelting and recovery of the metal iron. Grain steel is produced through a de-ironing separator, and further, products with higher economic value are produced through resource recycling of the tailings. According to the resource recycling method and system for the steelmaking tailings, waste is turned into wealth, and both the problem of environment pollution and the problem of resource waste are solved.

Description

technical field [0001] The invention relates to the technical field of secondary resource recovery, in particular to a method and system for resource recovery and utilization of steelmaking tailings. Background technique [0002] Steel slag is the slag discharged from steelmaking, which is divided into converter slag, open hearth furnace slag and electric furnace slag according to the furnace type; the discharge is about 15% to 20% of the crude steel output; it is mainly composed of calcium, iron, silicon, magnesium and a small amount of aluminum and manganese , phosphorus and other oxides; the main mineral phases are tricalcium silicate, dicalcium silicate, calcium magnesium olivine, calcium magnesium rhodoxene, calcium aluminate ferrite, and oxides of silicon, magnesium, iron, manganese, and phosphorus The solid solution formed by the material also contains a small amount of free calcium oxide, metallic iron, fluoroapatite, etc. In some areas, because the ore contains tit...

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Application Information

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IPC IPC(8): B02C21/00
CPCB02C21/00
Inventor 杨立武杨东海
Owner 杨立武
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