A method for measuring high-temperature interactive reactivity between blast furnace iron-containing charges

An iron furnace and high temperature technology is applied in the field of measuring the high temperature reactivity between iron-containing charges in a blast furnace, which can solve the problems of the measurement method and evaluation index of the non-high temperature interactive reactivity, affecting the metallurgical properties of the comprehensive charge, and achieve the purpose of reducing energy consumption and reducing energy consumption. The effect of pollutant emissions

Inactive Publication Date: 2021-12-31
UNIV OF SCI & TECH BEIJING +1
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Problems solved by technology

However, in the blast furnace charge structure, various types of iron ore are not smelted individually into the blast furnace, but mixed according to a certain ratio and then enter the blast furnace. There will be interaction and affect the metallurgical properties of the comprehensive charge
For a long time, people have known little about the interaction between different charges in the blast furnace smelting process, and no researchers have proposed a clear measurement method and evaluation index for the high-temperature interaction between different iron-containing charges.

Method used

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  • A method for measuring high-temperature interactive reactivity between blast furnace iron-containing charges
  • A method for measuring high-temperature interactive reactivity between blast furnace iron-containing charges
  • A method for measuring high-temperature interactive reactivity between blast furnace iron-containing charges

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Embodiment 1

[0052] The method of the present invention can measure the droplet performance of iron-containing charge (sintered ore, pellet ore), according to the droplet curve (such as image 3 shown), the temperature interval T of the melting droplet temperature of a single iron-containing charge is obtained 1 (Sinter droplet temperature range), T 2 (Pellet / lump droplet temperature range).

[0053] After mixing sinter and pellets (or lump ore) according to the ratio of 75%:25%, the same experimental method is used to measure the melting temperature range T of the mixed charge. 0 .

[0054] (1) Sample composition

[0055]

[0056] (2) Experimental procedure: Take 200g each of sinter, pellets and lump ore with a particle size of 10-12.5mm after drying, and conduct a single iron-containing charge droplet experiment; take 150g of sinter and 50g of pellet / lump , to form a mixed charge, and carry out the droplet experiment of the mixed charge; according to the temperature-pressure diffe...

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Abstract

The invention provides a method for measuring the high-temperature interactive reactivity between iron-containing charge materials of a blast furnace, and the method is used for measuring and evaluating the interactive reactivity of iron-containing charge materials. Traditionally, it is not comprehensive and accurate to infer the behavior of the comprehensive charge in the high-temperature zone of the blast furnace based on the droplet performance of a single charge. Sinter and lump ore / pellets interact at high temperatures. The refractory dripping performance of the furnace charge has an impact, and the high-temperature interactive reaction evaluation index is proposed, which can provide theoretical support for the optimal ore blending of the blast furnace.

Description

【Technical field】 [0001] The invention relates to the technical field of iron and steel metallurgy, in particular to a method for measuring the high-temperature interactive reactivity between iron-containing charges of a blast furnace. 【Background technique】 [0002] Due to the obvious differences in chemical composition and microstructure between high-basic sinter and acidic lump ore, pellets and other iron-containing materials, when they are in contact with each other, they are prone to sintering at high temperature under the impetus of concentration gradient. Diffusion and chemical reaction of components occur, which changes the formation of low melting point compounds near the contact surface of iron-containing charge, and then affects the softening and melting behavior of iron-containing charge. This reaction is called high-temperature interactive reaction. [0003] Sinter, natural lump ore and pellets are the main raw materials for modern blast furnace ironmaking. Aft...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N25/04C21B5/00
CPCG01N25/04C21B5/00
Inventor 陆亚男高远霍红艳吴胜利
Owner UNIV OF SCI & TECH BEIJING
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