Smelting slagging agent and smelting slagging method adopting AOD (Argon Oxygen Decarburization) double slag process

Abstract

The invention relates to a stainless-steel smelting slagging agent and a smelting slagging method, in particular to a smelting slagging agent and a smelting slagging method adopting the AOD (Argon Oxygen Decarburization) double slag process, and belongs to the field of stainless-steel smelting. The smelting slagging agent adopting the AOD double slag process comprises a first ingredient and a second ingredient, wherein the first ingredient is waste (high alumina crushed brick) generated after cast steel pouring; the second ingredient is fluorite; high alumina crushed brick comprises the following materials by mass: 68 to 72 percent of Al2O3, 22 to 28 percent of SiO2, 2 to 5 percent of CaO and 2 to 5 percent of Fe2O3; and the mass ratio of the first ingredient to the second ingredient is 0.5 to 1. The smelting slagging agent adopting the AOD double slag process is low in cost, facilitates environmental protection, and is high in comprehensive slagging effect.

Description

technical field [0001] The invention relates to a stainless steel smelting slag-removing agent and a smelting slag-removing method, mainly relating to an AOD double-slag method smelting slag-removing agent and an AOD double-slag method smelting slag-removing method, and belongs to the field of stainless steel smelting. Background technique [0002] At present, fluorite is mostly used as slagging agent in the steelmaking process, because the main component of fluorite is CaF 2 It can accelerate the rapid melting of slag and thin the thicker slag to increase the flow of slag and make it easy to desulfurize, but under the action of high temperature and slag, CaF 2 Some parts become volatiles, which will cause a lot of damage to equipment, human body and environment, especially AOD furnaces commonly used in stainless steel smelting, which are usually affected by CaF 2 Corrosion of furnace lining and lining, for double slag smelting process, two slagging makes CaF 2 The erosion...

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Problems solved by technology

[0002] At present, fluorite is mostly used as slagging agent in the steelmaking process, because the main component of fluorite is CaF 2 It can accelerate the rapid melting of slag and thin the thicker slag to increase the flow of slag and make it easy to desulfurize, but under the action of high temperature and slag, CaF 2 Some parts become volatiles, which will cause a lot of damage to equipment, human body and environment, especially AOD furnaces commonly used in stainless steel smelting, which are usually affected by CaF 2 Corrosion of furnace lining and lining, for double slag smelting process, two slagging makes CaF 2 The erosion of furnace lining and lining is more serious. In addition, fluorite, as the main component of slag-forming agent, is used in a high amount, and the price of fluorite is getting higher and higher due to the limited quantity. There is an urgent need to study an improved slag agent. The Chinese patent with the patent publication number CN1027003639 (2012-10-03) discloses a fluoride-free slag agent. The main component of the slag agent is bauxite. The method Although no F - , but for the AOD double slag method to smelt stainless steel, the cost is still high, and the slag removal effect is not enough

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