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Blast furnace flux and application thereof

A flux and blast furnace technology, applied in the field of metallurgy, can solve the problems of heat consumption, dilute reducing atmosphere, increase coke ratio, etc., and achieve the effect of reducing coke consumption, reducing production cost and broad application prospects.

Inactive Publication Date: 2012-05-02
PANZHIHUA GANGCHENG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the application of limestone will bring about heat consumption and generation of CO 2 Dilute the reducing atmosphere and increase the coke ratio

Method used

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  • Blast furnace flux and application thereof
  • Blast furnace flux and application thereof
  • Blast furnace flux and application thereof

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Embodiment Construction

[0013] The blast furnace flux of the present invention contains the following components by weight ratio: SiO 2 4 to 16 parts, Al 2 o 3 1 to 10 parts, Fe 2 o 3 5 to 20 parts, 5 to 30 parts of FeO, 2 to 20 parts of MgO, 20 to 60 parts of CaO, 1 to 50 parts of MFe (MFe means free iron, metal iron).

[0014] Wherein, the blast furnace flux of the present invention may also contain ≤10 parts of MnO in proportion by weight and the content of MnO is >0.

[0015] Among them, the blast furnace flux of the present invention is preferably composed of components in the following weight ratio: SiO 2 4 to 16 parts, Al 2 o 3 1 to 10 parts, Fe 2 o 3 5-20 parts, 5-30 parts of FeO, 2-20 parts of MgO, 20-60 parts of CaO, 1-50 parts of MFe, 0-10 parts of MnO.

[0016] Further, in order to improve the use effect of the blast furnace flux of the present invention, the particle diameter of the blast furnace flux is preferably 10-150mm.

[0017] In the blast furnace flux of the prese...

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PUM

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Abstract

The invention relates to a blast furnace flyx and application thereof, belongs to the technical field of metallurgy, and is used for solving the technical problem of providing a blast furnace flux capable of reducing the use amount of coke. The blast furnace flux comprises the following components in parts by weight: 4-16 parts of SiO2, 1-10 parts of Al2O3, 5-20 parts of Fe2O3, 5-30 parts of FeO, 2-20 parts of MgO, 20-60 parts of CaO and 1-50 parts of MFe.

Description

technical field [0001] The invention relates to a blast furnace flux and its application, belonging to the technical field of metallurgy. Background technique [0002] During iron and steel smelting, due to the need of blast furnace slagging, a certain amount of flux is often added to the blast furnace ingredients, referred to as flux. Its purpose is to make the refractory oxide (SiO 2 1713°C, Al 2 o 3 2050°C, CaO 2570°C) to generate low melting point compounds and form slag with good fluidity to achieve the purpose of separating slag and iron and removing harmful impurities. [0003] According to the different components of gangue and fuel ash in the ore, and the requirements for the type and quality of smelted pig iron, the fluxes used in blast furnaces include alkaline limestone (CaCO 3 ), dolomite [(Ca, Mg)CO 3 ]; acidic silica (SiO 2 ). There are also forsterite and serpentine that are used as MgO-containing and acidic fluxes, and fluorite (CaF 2 )Wait. Howev...

Claims

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Application Information

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IPC IPC(8): C21B3/02C21B5/04
Inventor 蒋光旭钱文许钱强
Owner PANZHIHUA GANGCHENG GROUP
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