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Method and plant for removing arsenic and/or antimony from flue dusts

A raw material and blast furnace technology, which is applied in the field of loading raw materials into the blast furnace, can solve problems such as increased ventilation resistance, achieve the effects of improved reactivity, improved raw material reactivity, and stable blast furnace operation

Inactive Publication Date: 2016-05-18
JFE STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, when reduction materials, especially coke, are reduced, the furnace ventilation resistance of the blast furnace increases due to the reduction of coke ensuring furnace ventilation.

Method used

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  • Method and plant for removing arsenic and/or antimony from flue dusts
  • Method and plant for removing arsenic and/or antimony from flue dusts
  • Method and plant for removing arsenic and/or antimony from flue dusts

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Embodiment

[0068] Figure 6 The load softening test apparatus used in this example is shown. In the figure, reference numeral 21 is a crucible, reference numeral 22 is a raw material, reference numeral 23 is a load loading device, reference numeral 24 is a punch (puncrod), reference numeral 25 is a heater, and reference numeral 26 is Furnace core tube, reference numeral 27 is a thermocouple, reference numeral 28 is a gas mixing device, reference numeral 29 is a gas analysis device, and reference numeral 30 is a drip sampling device.

[0069] This load softening test device is a device for simulating the reaction behavior of ore in a blast furnace, and can simulate reactivity in a furnace, that is, a reduction reaction in a blast furnace. Using this test device, in Table 1, Table 2, Figure 7 (a) and Figure 7 Under the conditions shown in (b), the sample temperature and gas composition were determined, and the gas flowing in the middle or peripheral part simulating the dimensionless r...

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Abstract

A method for the treatment of flue dusts containing arsenic and / or antimony from pyrometallurgical methods, wherein a reducing agent is added to the flue dusts, the flue dusts are heated together with the reducing agent, and volatile components are separated from a slag. The reducing agent is a carbonaceous compound.

Description

technical field [0001] The present invention relates to a method of charging raw materials into a blast furnace by charging raw materials into a blast furnace through a rotating chute. Background technique [0002] In recent years, from the viewpoint of preventing the global warming effect, reduction of CO 2 . In the steel industry, CO 2 About 70% of the emissions are caused by blast furnaces, requiring reduction of CO in blast furnaces 2 discharge volume. Here, it is considered that by reducing the reducing materials (coke, finely powdered coal, natural gas, etc.) used in the blast furnace, CO 2 reduce. [0003] However, when the reducing materials, especially coke, are reduced, the coke ensuring the ventilation in the furnace decreases, which increases the furnace ventilation resistance of the blast furnace. [0004] This is because, in a general blast furnace, when the temperature at which the ore charged from the furnace roof starts to soften, the ore deforms and s...

Claims

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Application Information

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IPC IPC(8): C21B5/00
CPCC21B5/008C21B7/20
Inventor 市川和平广泽寿幸渡壁史朗
Owner JFE STEEL CORP