Carbon-free steel ladle drainage agent for extremely-low carbon steel

A technology of carbon-free steel ladle and ultra-low carbon steel, which is applied in the direction of casting molten material containers, manufacturing tools, metal processing equipment, etc., can solve the problems of unstable thermal performance, low automatic glue opening rate, large expansion coefficient, etc., and achieve high specific gravity , Reasonable particle size matching and small expansion coefficient

Active Publication Date: 2013-06-12
HENAN TONGYU METALLURGY MATERIALS GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a carbon-free ladle drainage agent for ultra-low carbon steel, which can solve the problems in the prior art of large expansion coefficient, unstable thermal performance, low automatic glue opening rate, and carbon addition to molten steel components of ultra-low carbon steel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Take 60 parts of chrome ore , 15 parts of high-purity white quartz sand , 13 parts of high-purity white quartz sand , 12 parts of fused magnesia , first Mix and stir high-purity white quartz sand and fused magnesia for 10 minutes, then add chrome sand and stir for 5 minutes, then dry in the upper tower. . The percentage of active ingredients in this product Cr 2 o 3 : 27.75%, SiO 2 : 29.44%, MgO: 15.64%, Fe 2 o 3 : 16.72%, Al 2 o 3 : 8.47%, the carbon-free drainage agent produced by this scheme is used in a special steel for 2.5 to 3.5 hours of refining time, and the self-opening rate is over 98.5%, which is 10% higher than the self-opening rate of the drainage agent produced by other manufacturers, and There is no pollution to molten steel, and the casting slab pass rate reaches 99.8%.

Embodiment 2

[0014] Take 68 parts of chrome ore , 12 parts of high-purity white quartz sand , 10 parts of high-purity white quartz sand , and 10 parts of fused magnesia . Mix and stir high-purity white quartz sand and fused magnesia for 10 minutes, then add chrome sand and stir for 5 minutes, then dry in the upper tower. . The percentage of active ingredients in this product Cr 2 o 3 : 31.28%, SiO 2 : 23.52%, MgO: 14.71%, Fe 2 o 3 : 19.09%, Al 2 o 3 : 9.86%, the carbon-free drainage agent produced by this scheme is used for refining in Benxi Steel Works for 3 to 4 hours, and the self-opening rate is 99.7%, reaching more than 1,400 furnaces in a row. Molten steel is pollution-free.

Embodiment 3

[0016] Take 73 parts of chrome ore , 10 parts of high-purity white quartz sand , 7 parts of high-purity white quartz sand , and 10 parts of fused magnesia . Mix and stir high-purity white quartz sand and fused magnesia for 10 minutes, then add chrome sand and stir for 5 minutes, then dry in the upper tower. . The percentage of active ingredients in this product Cr 2 o 3 : 33.60%, SiO 2 : 18.85%, MgO: 15.18%, Fe 2 o 3 : 20.43%, Al 2 o 3 : 10.81%, the non-carbon draining agent produced by this scheme is used in Handan No. 4 Steelmaking for 3 to 4 hours of refining time, the self-opening rate is 100%, and there is no carbon increase in molten steel detection.

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Abstract

The invention discloses a carbon-free steel ladle drainage agent for extremely-low carbon steel. The carbon-free steel ladle drainage agent for the extremely-low carbon steel comprises the following active ingredients in percentage by mass: 20 to 36 percent of Cr2O3, 10 to 40 percent of SiO2, 10 to 25 percent of Fe2O3, 5 to 18 percent of Al2O3 and 10 to 20 percent of MgO. The carbon-free steel ladle drainage agent for the extremely-low carbon steel comprises the following active ingredients of 31.28 percent of Cr2O3, 23.52 percent of SiO2, 14.71 percent of MgO, 19.09 percent of Fe2O3 and 9.86percent of Al2O3. The carbon-free steel ladle drainage agent for the extremely-low carbon steel is prepared from the following raw materials in percentage by mass: 50 to 80 percent of chromite sand, 10 to 30 percent of white quartz and 8 to 20 percent of electro-fused magnesia.

Description

technical field [0001] The invention belongs to the technical field of metallurgical auxiliary materials, in particular to a drainage agent used for smelting ultra-low carbon steel. Background technique [0002] Ladle drainage agent is a refractory material with high temperature resistance, good thermal stability and strong corrosion resistance. It is used for ladle pouring in the smelting process. It is very important to improve the quality of molten steel and meet the current high-speed continuous casting and pure steel production. At present, the ladle drainage agent is commonly used, and generally no silicon drainage agent is used for refining, chromium silicon drainage agent is used for refined steel, and zirconium drainage agent is used for high value-added steel grades. The above drainage agents, in order to meet the normal use requirements of the steel plant, in the design of the drainage agent scheme, in order to ensure the appropriate thickness of the sintered laye...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/08B22D41/44
Inventor 李秀峰朱云峰唐红波
Owner HENAN TONGYU METALLURGY MATERIALS GRP
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