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

A carbon-free ladle, ultra-low carbon steel technology, applied in casting melt containers, manufacturing tools, metal processing equipment, etc., can solve the problems of low automatic glue opening rate, unstable thermal performance, large expansion coefficient, etc. Reasonable collocation, large specific gravity and small expansion coefficient

Active Publication Date: 2011-11-09
HENAN TONGYU METALLURGY MATERIALS GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 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

[0013] Take 60 parts of chromium ore sand , 15 parts of high-purity white quartz sand, 13 parts of high-purity white quartz sand, and 12 parts of fused magnesia sand. Mix and stir high-purity white quartz sand and fused magnesia for 10 minutes, then add chrome sand and stir for 5 minutes, and dry on the tower. . The percentage of active ingredients in the 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, and the self-opening rate is more than 98.5%, which is 10% higher than the self-opening rate of the drainage agent produced by other manufacturers, and It has no pollution to molten steel, and the qualified rate of casting billet reaches 99.8%.

Embodiment 2

[0015] Take chrome ore 68 parts, high-purity white quartz sand 12 parts, high-purity white quartz sand 10 parts, fused magnesia 10 parts, first Mix and stir high-purity white quartz sand and fused magnesia for 10 minutes, then add chrome sand and stir for 5 minutes, and dry on the tower. . The percentage of active ingredients in the 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 time of 3 to 4 hours in Benxi Steel Plant, and the self-opening rate is 99.7%, reaching more than 1,400 consecutive furnaces. The molten steel is pollution-free.

Embodiment 3

[0017] Take chrome ore 73 parts, high-purity white quartz sand 10 parts, high-purity white quartz sand 7 parts, fused magnesia 10 parts, first Mix and stir high-purity white quartz sand and fused magnesia for 10 minutes, then add chrome sand and stir for 5 minutes, and dry on the tower. . The percentage of active ingredients in the 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 carbon-free draining agent produced by this scheme is used for refining time of 3 to 4 hours in Handan No. 4 steelmaking, the self-opening rate is 100%, and there is no carburization phenomenon 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

[0001] technical field [0002] 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 [0003] Ladle drainage agent is a refractory material with high temperature resistance, good thermal stability and strong corrosion resistance. It is used for ladle casting 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, ladle drainage agents are commonly used. Generally, siliceous drainage agents are not used for refining, chromium siliceous drainage agents are used for refining steel, and zirconium drainage agents are used for high value-added steel grades. The above several kinds of drainage agents, in order to meet the normal use requirements of steel mills, in the design of the drainage agent scheme, in order to ensure the appropriate t...

Claims

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Application Information

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Patent Type & Authority Applications(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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