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Antisticking ladle dreg modifying agent for refining out of furnace

An out-of-furnace refining and modifier technology, applied in the field of steelmaking, can solve problems such as failure to achieve production continuity and limit production efficiency, and achieve the effects of improving continuity and increasing the time of refining treatment.

Inactive Publication Date: 2008-11-19
CHONGQING UNIV
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  • Claims
  • Application Information

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Problems solved by technology

This is far from meeting the requirements of continuous production, which greatly limits the improvement of production efficiency.

Method used

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  • Antisticking ladle dreg modifying agent for refining out of furnace

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with specific examples.

[0028] First, detect the ingredients of raw material active lime, corundum slag and fluorite, and select raw materials that meet the following weight ratio conditions, that is, active lime: CaO>90%; corundum slag: CaO 5-15%, Al 2 o 3 60-80%; Fluorite: CaF 2 >85%, SiO 2 <15%; moisture in the three raw materials <0.5%; S or / and P<0.08%; otherwise, it should not be used.

[0029] Then, dry, crush and sieve the above-mentioned raw materials, and it is required that more than 90% of the crushed raw materials have a particle size of less than 8mm;

[0030] In the third step, according to the conditions of the chemical composition of the anti-sticking ladle slag modifier, the weight of the required raw materials can be calculated, see Table 1.

[0031] The chemical composition (percentage by weight) of the anti-sticking ladle slag modifier of the present invention satisfies:

[...

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Abstract

The invention provides an anti-sticking ladle slag modifying agent for external refining, which consists of active lime, corundum slag and fluorite. The chemical compositions by weight percentage of the modifying agent are: 75 to 85 percent of CaO, 0 to 5.0 percent of SiO2, 2.0 to 8.0 percent of Al2O3, 4.0 to 8.0 percent of F<->, 0 to 5 percent of MgO, and the balance being impurities; in the impurities: FeO and MnO are less than 5.0 percent, H2O is less than 0.5 percent, and S and / or P is less than 0.08 percent. Compared with the prior art, the modifying agent has remarkable effect on relieving the slag sticking of ladles and RH submerged tubes, can effectively prevent the slag sticking of the ladles and the RH submerged tubes, improve the service life of the RH submerged tubes, and remarkably increase the effect of slag sticking prevention; the modifying agent does not increase the time of refining processing, contributes to the continuity of the production, and remarkably improves production efficiency. The charging quantity which does not stick slag can at least reach 12.

Description

technical field [0001] The invention belongs to the field of steelmaking, and in particular relates to a refining ladle slag modifier used for preventing slag sticking to ladles and RH dipping pipes in the process of refining outside a furnace. Background technique [0002] During the refining process outside the molten steel furnace, due to the adhesion of high-temperature melt or the solidification and bonding after cooling, the ladle or RH dipping tube often has the problem of sticking steel or slag, which affects the normal production and the improvement of production efficiency. . For example, during the RH refining process, the sticky slag of the RH dipping tube will cause the RH dipping tube to become thicker and longer, and the ladle clearance will be reduced. It must be cleaned before it can be used. The dipping tube is damaged, and the vacuum chamber is offline in advance, which directly affects the improvement of production efficiency. Another example is ladle s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/00C21C7/076
CPCY02P10/20
Inventor 梁小平王雨金杨李欣潘红
Owner CHONGQING UNIV
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