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Converter slag fluoride-free fusing agents and method for producing the same

A converter slag and flux technology, which is applied in the manufacture of converters and other directions, can solve the problems of unstable fluorite grade and quality, harm to human health, and strong corrosiveness of furnace lining, so as to improve the kinetic conditions of the molten pool reaction and be beneficial to environmental protection. , the effect of high slag activity

Active Publication Date: 2015-01-14
西峡县恒基冶材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of fluorite slag has the following disadvantages: the furnace lining is highly corrosive, pollutes the environment, endangers human health, the grade and quality of fluorite are unstable, and it is facing the situation of being gradually eliminated.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] A converter slag fluorine-free flux, which contains metal aluminum (Al), manganese oxide (MnO), aluminum oxide (Al 2 o 3 ), iron and its oxides (TFe), silicon dioxide (SiO 2 ), Calcium Oxide (CaO), Magnesium Oxide (MgO) and other unavoidable impurities; the weight percentages of its components are: metal aluminum 1-15, manganese oxide 10-40, aluminum oxide 30-50 , Iron and its oxides 5-20, silicon dioxide ≤ 20, calcium oxide ≤ 7, magnesium oxide ≤ 3, other substances the balance.

[0013] In the above-mentioned fluorine-free flux for converter slag, the metal aluminum is aluminum ash or aluminum scrap or aluminum-containing waste or aluminum-iron alloy or aluminum pellets, or a mixture of two or more of them in any proportion.

[0014] In the above-mentioned fluorine-free flux for converter slag, the manganese oxide is ferromanganese alloy or manganese ore, or a mixture of the two in any proportion.

[0015] The preparation method of the above-mentioned converter sla...

Embodiment 2

[0030] A converter slag fluorine-free flux, which contains metal aluminum (Al), manganese oxide (MnO), aluminum oxide (Al 2 o 3 ), iron and its oxides (TFe), silicon dioxide (SiO 2 ), Calcium Oxide (CaO), Magnesium Oxide (MgO) and other unavoidable impurities; the weight percentages of its components are: metal aluminum 1-15, manganese oxide 10-40, aluminum oxide 30-50 , Iron and its oxides 5-20, silicon dioxide ≤ 20, calcium oxide ≤ 7, magnesium oxide ≤ 3, other substances the balance.

[0031] In the above-mentioned fluorine-free flux for converter slag, the metal aluminum is aluminum ash or aluminum scrap or aluminum-containing waste or aluminum-iron alloy or aluminum pellets, or a mixture of two or more of them in any proportion.

[0032] In the above-mentioned fluorine-free flux for converter slag, the manganese oxide is ferromanganese alloy or manganese ore, or a mixture of the two in any proportion.

[0033] The preparation method of the above-mentioned converter sla...

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Abstract

The invention relates to converter slag fluoride-free fusing agents and a method for producing the converter slag fluoride-free fusing agents. The converter slag fluoride-free fusing agents comprise metallic aluminum, manganese oxide, aluminum oxide, iron and iron oxide, silica, calcium oxide, magnesium oxide and other unavoidable impurities, and are suitable for slagging in the process of converter steelmaking. Used raw materials are common, balling process is advanced and reliable, and the fluoride-free fusing agents are convenient to use. The converter slag fluoride-free fusing agents and the method for producing the converter slag fluoride-free fusing agents have the advantages of obviously improving reaction kinetics conditions of a molten pool, being high in slag activity, well resolving the problems of steel-bonding of an oxygen lance, metal splashing and poor capacity of sulphur (S)-removing and phosphorus (P)-removing of slag due to re-drying of the slag, lowering tetrafluoroethylene (TFe) content of the slag, increasing yield of ferrum (Fe) in liquid steel, reducing cost of the liquid steel per ton, shortening smelting time, improving content and yield of manganese in the liquid steel, reducing corrosion to a furnace lining, having good slag-splashing and furnace-protection effects, being favorable for environment protection and achieving fluoride-free steel-making due to the fact that fluoride (F-) does not exist, and meeting the requirements for cleaning in the converter steel-making production process.

Description

technical field [0001] The invention relates to a converter slag flux for steelmaking, in particular to a converter slag fluorine-free flux. Background technique [0002] The process of steelmaking is the process of smelting slag. Making good slag is an important link in the steelmaking process. For example, the physical and chemical properties and amount of slag in converter steelmaking slag are related to the removal of impurities in steel, the absorption of floating non-metallic inclusions in metal, and the size of splash and metal yield rate. Lime is a commonly used slagging material, and CaO is easily combined with SiO in the smelting process. 2 The reaction produces high melting point C 2 S (2050°C) will cause the slag to become viscous, which will affect the slag forming speed and the phenomenon of "reverse drying", which will lead to a series of problems such as oxygen lance sticking to steel, metal splashing, and slag removal ability. Therefore, the slag must be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/36
Inventor 陈希来杨杰谢小群汪汉杰朱先营
Owner 西峡县恒基冶材有限公司
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