Steel-making dephosphorization agent and preparation method thereof

A technology of steel dephosphorization agent and dephosphorization agent, which is applied in the field of metallurgy, can solve the problems of unfavorable dephosphorization technology popularization and development, high production cost, etc., and achieve the effects of favorable popularization and development, reduced production cost, and easy storage

Inactive Publication Date: 2012-11-21
辽宁中汇环保科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Higher production costs are not conducive to the popularization and development of dephosphorization technology, so it is of great significance to study the use of low-cost raw materials to produce pre-melted calcium ferrite dephosphorization agents

Method used

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  • Steel-making dephosphorization agent and preparation method thereof
  • Steel-making dephosphorization agent and preparation method thereof
  • Steel-making dephosphorization agent and preparation method thereof

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Embodiment Construction

[0015] Preferred embodiments of the present invention will be described in detail below. What needs to be explained before this is that the terms or words used in this specification and claims should not be limited to be interpreted as the usual meaning or the meaning in the dictionary, but should be based on the best way for the inventor to explain his invention. The principle of appropriately defining the concepts of terms is interpreted as meanings and concepts consistent with the technical idea of ​​the present invention. Accordingly, the structures shown in the embodiments described in this specification are only one of the best embodiments of the present invention, and cannot fully represent the technical ideas of the present invention, so it should be understood that there may be alternatives for the present invention. Various equivalents and modifications.

[0016] The dephosphorization agent for steelmaking produced by the method of the present invention is illustrat...

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Abstract

The invention puts forward a steel-making dephosphorization agent and a preparation method thereof. Raw materials of the dephosphorization agent mainly comprise industrial waste rich in calcium oxide and iron oxide. The preparation method thereof comprises preparing the raw materials, crushing, mixing, stirring, smelting at a high temperature of 1500 to 1550 DEG C, cooling crystallization after melting and tapping, breaking to mold, and obtaining the calcium ferrite dephosphorization agent rich in CaO and Fe2O3 and having a particle size of 5 to 40 mm, wherein the prepared steel-making dephosphorization agent has a main phase of 2Cao.Fe2O3, a melting point of not more than 1280 DEG C, the melting point having a small fluctuation range, stable components, and a variety of equivalent physical and chemical indexes to steel-making dephosphorization agents prepared from high-purity materials. According to the invention, the method is low in production cost, and the product is stable in quality, pollution-free and easy to store. The method is beneficial to popularization and development of a dephosphorization technology.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a steelmaking dephosphorization agent and a method for preparing it by using waste materials. Background technique [0002] As we all know, phosphorus is usually a harmful element in steel, because high phosphorus content in steel will cause cold and brittle steel to affect some mechanical properties of steel, so it should be controlled. In the current traditional technology, the phosphorus in steel is generally required to be controlled below 0.012%, and the phosphorus in some pure steels and ultra-low phosphorus steels must be controlled at about 0.005%, or even below 0.003%. As a result, different dephosphorization processes, such as "double slag method" or "two-step method" and so on; and a variety of dephosphorization materials, such as CaO-Fe 2 o 3 -Al 2 o 3 system and CaO-Fe 2 o 3 It is a dephosphorization agent outside the flux furnace. With the popu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/064
Inventor 陈云天
Owner 辽宁中汇环保科技有限公司
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