High-efficiency slagging and dephosphorization agent and preparation method thereof

A technology of slag dephosphorization agent and steel dephosphorization agent, which is applied in the field of metallurgy to achieve the effect of reducing dosage, shortening processing time and improving effect

Inactive Publication Date: 2012-11-21
LIAONING TIANHE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for the existing pre-melted calcium ferrite slag dephosphorization agent, its ferrous content is generally higher than 12.0% (weight percentage), which cannot meet the current development of the steelmaking industry.

Method used

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  • High-efficiency slagging and dephosphorization agent and preparation method thereof
  • High-efficiency slagging and dephosphorization agent and preparation method thereof
  • High-efficiency slagging and dephosphorization agent and preparation method thereof

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Embodiment Construction

[0013] 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.

[0014] The slag dephosphorization agent for steelmaking produced by the method of the present invention with fo...

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Abstract

The invention proposes a high-efficiency slagging and dephosphorization agent and a preparation method thereof. The preparation method of the slagging and dephosphorization agent comprises preparing raw materials, crushing, mixing with stirring, distributing materials in a batch-wise way, smelting at a high temperature of 1500 to 1550 DEG C, smelting and tapping, cooling crystallization, breaking to mold, and obtaining the slagging and dephosphorization agent for steel-making, wherein the agent is rich in CaO and Fe2O3, has a particle size of 3 to 40 mm, uses 2CaO.Fe2O3 as a main phase and has a melting point of less than or equal to 1280 DEG C. The dephosphorization agent has increased ferric oxide content due to reduced ferrous oxide, thereby enhancing oxidizability and further improving the slagging and dephosphorization effect of the agent. The agent facilitates reducing dosage of the dephosphorization agent, shortening processing time and improving working efficiency.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, in particular to a slag dephosphorization agent used for removing phosphorus in steel and reducing the phosphorus content in molten steel during the converter steelmaking process and a preparation method thereof. Background technique [0002] At present, as the demand for low-phosphorus steel continues to increase, the amount of dephosphorization materials is also increasing accordingly, and the types of dephosphorization agents are also increasing. There are also quite a few dephosphorization agents disclosed in the prior art with different components and compositions and prepared by different preparation methods. These dephosphorization materials all have a certain dephosphorization effect, and it is recognized that the material with the best dephosphorization effect of slag is pre-melted calcium ferrite. The reason why the pre-melted calcium ferrite slag dephosphorization agent has better ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C1/02C21C7/064
Inventor 陈云天
Owner LIAONING TIANHE TECH
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