Iron extracting and steelmaking process for comprehensively treating copper ore tailing and nickel molten slag

A comprehensive treatment and melting slag technology, which is applied in the field of iron extraction and steelmaking, can solve problems such as patents that have not yet been seen, and achieve the effects of improving smelting efficiency, good reduction reaction kinetics conditions, and reducing production costs

Inactive Publication Date: 2011-05-11
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Abstract
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Problems solved by technology

[0003] Have not seen the report that above these patents are applied to industrial production so far

Method used

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  • Iron extracting and steelmaking process for comprehensively treating copper ore tailing and nickel molten slag
  • Iron extracting and steelmaking process for comprehensively treating copper ore tailing and nickel molten slag
  • Iron extracting and steelmaking process for comprehensively treating copper ore tailing and nickel molten slag

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Embodiment Construction

[0037] see figure 1 , the present invention uses submerged arc furnace-shaking furnace-steelmaking furnace to comprehensively process the iron extraction and steelmaking process of copper beneficiation tailings and nickel molten slag, and the specific operation process is as follows:

[0038] 1) Select the copper beneficiation tailings or diluted electric furnace slag from the factory. The composition of the copper beneficiation tailings contains Fe≥40%, and the content of alkaline oxides (CaO+MgO)2)≥90%, use this slag as raw material for smelting low-grade ferrosilicon.

[0039] Submerged arc furnace smelting requires raw materials to have a certain particle size. The reducing agent (metallurgical coke particles, anthracite coal powder or semi-coke particles) is crushed, the particle size is 150-200 mesh, and the weight ratio of copper beneficiation tailings and carbonaceous reducing agent is 1:0.28-0.34, and the weight ratio is fully mixed evenly. The embodiment provides th...

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Abstract

The invention discloses an iron extracting and steelmaking process for treating copper ore tailing and nickel molten slag by an ore heating furnace, a shaking furnace, a steelmaking electric arc furnace and a refining furnace. The iron extracting and steelmaking process comprises the following steps of: (1) uniformly mixing copper ore tailing and a carbonaceous reducing agent and granulating into pellet lump ore; (2) charging the pellet lump ore into the ore heating furnace and smelting to obtain silicon-contained molten iron; (3) desulfurating and deslagging the silicon-contained molten iron to obtain low-sulphur-silicon molten iron or confirming whether sulphur is removed according to the sulphur content of the silicon-contained molten iron; (4) transporting the nickel molten slag to an iron extracting station in a heat preserving way; (5) charging the nickel molten slag into the shaking furnace, adding lime and low-sulphur-silicon molten iron, mixing and stirring to obtain reduced molten iron; and (6) conveying the reduced molten iron into the electric arc furnace and adding lime for desulfurating, decarbonizing and dephosphorizing to obtain molten steel. The process reasonably utilizes the components of the copper ore tailing, fully recovers valuable metals in the copper ore tailing and the nickel molten slag, achieves the aim of comprehensive utilization, has reasonable design, is convenient for mastering and construction and is suitable for industrialized application.

Description

technical field [0001] The invention relates to an iron extraction and steelmaking process, in particular to an iron extraction and steelmaking process for comprehensively treating copper beneficiation tailings and nickel molten slag by using submerged arc furnace-shaking furnace-steelmaking furnace-refining furnace. Background technique [0002] Copper tailings slag and nickel molten slag produced in nickel-copper metallurgical enterprises also contain a certain amount of valuable elements, which have not been fully utilized yet. The dumping of these slags and smelting slags not only has a serious impact on the environment, but also occupies a large amount of land resources. For example, Jinchuan Group discharges more than 2 million tons of nickel waste slag every year, and the accumulated stockpile has reached more than 20 million tons. Apart from a small amount of valuable metals such as nickel, copper and cobalt, these waste slags also contain up to 40% Iron. At present...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B11/10C22B1/14
Inventor 袁守谦王超董洁张兵谷坤文
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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