Continuous-casting mold flux for decreasing sticking steel breakouts and preparation method thereof

A continuous casting mold slag and breakout technology, which is applied in the field of continuous casting production technology, can solve the problems of high probability of mold slag bonding, affecting the fluidity of molten slag, and high viscosity of mold slag, so as to avoid sticking accidents and reduce generation rate, improving the effect of melting distance
CN106583673AActive Publication Date: 2017-04-26HENAN TONGYU METALLURGY MATERIALS GRP
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
HENAN TONGYU METALLURGY MATERIALS GRP
Publication Date
2017-04-26

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Abstract

The invention discloses a continuous-casting mold flux for decreasing sticking steel breakouts and a preparation method thereof. The continuous-casting mold flux for decreasing the sticking steel breakouts comprises the following chemical components of, by weight, 32.5-35.5 percent of SiO2, 29.5-31.5 percent of CaO, 1.5-3.0 percent of MgO, 2.2- 3.0 percent of Al2O3, 0.5-1.5 percent of Fe2O3, 11.0-13.0 percent of Na2O, 10.0-12.0 percent of F-, 3.0-4.0 percent of C solid and the balance unavoidable impurity, wherein the binary basicity is 0.87 to 0.93; a melting point is 1050 to 1070 DEG C; and the viscosity below 1300 DEG C is 0.115Pa*S to 0.135Pa*S. In the practical application of the mold flux, a flame in a crystallizer is uniform; the spreadability is better; caking and agglomerating phenomena do not exist; a melt cinder is stable; the lubrication is sufficient; and the rate of the sticking steel breakouts can be decreased to below 5 percent from original 10 to 20 percent.
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Description

technical field

[0001] The invention relates to the technical field of continuous casting production technology, in particular to a continuous casting mold powder for reducing bonding breakout and a preparation method thereof. Background technique

[0002] In the continuous casting process, the high-temperature molten steel first flows from the ladle into the tundish through the long nozzle, and then flows from the tundish into the mold through the submerged nozzle. In the crystallizer, due to the heat transfer between the molten steel and the copper plate of the mold, the molten steel solidifies into a billet shell with a certain thickness, and then under the action of mold vibration and billet drawing, the billet shell can be continuously pulled out of the mold and enters the Secondary cooling zone; If the liquid level fluctuates too much or the mold slag flows unevenly, etc., resulting in poor lubrication between the billet shell and the crystallizer, bonding will occur. ...

Claims

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