Chromium conducting sand for a molten steel container
A technology for draining sand and ladles, which is applied in casting melt containers, metal processing equipment, casting equipment, etc., to achieve high refractoriness, overcome poor sintering performance, and strong slag resistance
Inactive Publication Date: 2006-08-23
上海汇集新材料股份有限公司
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AI Technical Summary
Problems solved by technology
[0007] However, with the adoption of new technologies such as ladle refining and continuous casting in iron and steel enterprises, the residence time of molten steel in the ladle is often required to be extended to more than 120 minutes, which is unbearable for quartz drainage sand
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment 1
[0016] Example 1: Naphthalenesulfonate composed of 70 parts of chrome concentrate, 30 parts of quartz sand, 0.5 part and 0.1 part of graphite powder. The service condition is 100 tons of ladle, and the nozzle diameter is φ50mm.
Embodiment 2
[0017] Example 2: The composition is 75 parts of chrome concentrate, 25 parts of quartz sand and 1.0 part of graphite powder. The service condition is 100 tons of ladle, and the nozzle diameter is φ50mm.
Embodiment 3
[0018] Example 3: The composition is 80 parts of chrome concentrate, 20 parts of quartz sand and 1.5 parts of graphite powder. The service condition is 100 tons of ladle, and the nozzle diameter is φ50mm.
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Abstract
The invention is a chromic steel ladle drainage sand, its character: it contains 70-85 shares of Cr refined mineral, 15-30 shares of quartz sand and 0.5-2 shares of graphite. It has very high fireproof degree and extremely strong anti-residue function, and when the molten steel is placed statically for over 100 minutes, its self-opening rate is still up to about 95%.
Description
technical field [0001] The invention relates to the technical field of ladle sliding nozzle pouring steel, in particular to chrome ladle nozzle drainage sand (also known as sliding nozzle filler). Background technique [0002] In the 1960s and 1970s, the wide application of ladle sliding nozzle pouring technology showed great advantages in reducing process costs, facilitating production management and reducing labor intensity. At the same time, in order to prevent the secondary oxidation of molten steel and control the formation of harmful inclusions, metallurgists from various countries have actively carried out the research and development of ladle nozzle drainage sand (also known as sliding nozzle filler) products and ladle automatic pouring technology. [0003] In the past, quartz-based drainage sand was mostly used at home and abroad. It has the characteristics of easy control of composition, performance, and low price. It is more suitable for the production conditions ...
Claims
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IPC IPC(8): B22D41/48B22D41/22
Inventor 朱湧选
Owner 上海汇集新材料股份有限公司