Method for processing side product

A treatment method and by-product technology, applied in chemical instruments and methods, solid separation, magnetic separation, etc., can solve the problems of low material separation efficiency, improve zinc removal rate and iron recovery rate, increase zinc content, increase iron The effect of content

Inactive Publication Date: 2019-03-05
POHANG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the cyclone separation method using the difference in specific gravity has the problem of very low separation efficiency for ultrafine particles and materials with a wide range of particle sizes

Method used

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  • Method for processing side product
  • Method for processing side product
  • Method for processing side product

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Embodiment Construction

[0023] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in various ways and is not limited to the embodiments disclosed below, which are provided to clearly understand the scope of the present invention to those skilled in the art.

[0024] The invention relates to a by-product treatment method which can improve the iron recovery rate and zinc removal rate when iron (Fe) is recovered from the by-product produced in the ironmaking process.

[0025] Preferred embodiments of the present invention are described below with reference to the accompanying drawings.

[0026] figure 1 is a flowchart showing the by-product treatment process of the embodiment of the present invention. figure 2 is a block diagram showing the by-product processing apparatus of the embodiment of the present invention.

[0027] The by-product treatment method according to an embodiment of t...

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Abstract

The invention provides a method for processing a side product. The method comprises the steps of a process preparing an Fe-contained side product which is generated in an iron smelting process; a process of grinding a particle surface which forms the side product for separating zinc from the Fe particle surface in the side product; and a magnetic separation process of applying a magnetic field tothe side product in which zinc is separated from the Fe particle surface for obtaining a magnetic product with relatively high Fe content and a non-magnetic product with relatively high zinc content.Therefore, according to the solution of the invention, the Fe and the zinc can be effectively separated in the subsequent magnetic separation process. In another word, compared with prior art, the method according to the invention can reduce zinc content and increase Fe content in the magnetic product, and furthermore can increase the zinc content in the non-magnetic product, namely the zinc elimination rate and Fe recovery rate of the Fe-containing side product.

Description

technical field [0001] The invention relates to a by-product treatment method. More specifically, the present invention relates to a by-product treatment method in which by-products generated in an ironmaking process can be reused. Background technique [0002] Typically, iron-containing by-products are produced during ironmaking processes, namely blast furnace operations and converter steelmaking converting operations. In order to reuse resources and reduce costs, the by-products can be used as raw materials for manufacturing sintered ore and raw materials for blast furnace ironmaking process. However, the content of zinc (Zn) components in blast furnace sludge and steelmaking sludge is tens to hundreds of times that of general ironmaking raw materials such as iron ore and sinter. [0003] If the high-zinc by-products with such a high zinc content are directly used as raw materials for the manufacture of sintered ore without further treatment, the productivity and reducti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B19/30C21B3/04B03C1/02
CPCB03C1/02C21B3/04C22B19/30Y02P10/20Y02W30/50C21B15/00C21B2200/00C22B7/005
Inventor 朴钟力王敏奎
Owner POHANG IRON & STEEL CO LTD
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