Preparation method and proportion of components of low-carbon magnesium-calcium carbon brick for manufacturing inner lining of steel-making refining furnace
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A technology of carbon-magnesium-calcium-carbon bricks and refining furnaces, which is applied in the field of component distribution and preparation of low-carbon magnesium-calcium-carbon bricks, and can solve problems that are not suitable for smelting low-carbon steel and ultra-low carbon steel
Inactive Publication Date: 2011-05-04
ZHENGZHOU ANNEC IND
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[0003] The magnesia-carbon bricks that emerged in the 1970s have been the first choice for the lining of steelmaking furnaces for many years, but due to the high carbon
Method used
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[0049] Sintered magnesia-calcium sand fine powder (MgO~80%, CaO~20%) <0.088mm 25%
[0050] Micropowder graphite ≤10um 1%
[0051] Nano carbon black 0.5%
[0052] High temperature asphalt powder <0.088mm 1%
[0053] Metal Al powder 2%
[0054] B 4 C 0.5%
[0055] SD911 anhydrous resin +4% (additional)
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Abstract
The invention relates to a preparation method and proportion of components of a low-carbon magnesium-calcium carbon brick for manufacturing an inner lining of a steel-making refining furnace. In the invention, electro-fused or sintered magnesium-calcium powder, magnesia micro-powder, nano-carbon block, graphite, an antioxidant and a binding agent are mainly adopted as main components for proportioning, the carbon content in the components is lower than 5%, and a finished product can be prepared by controlling the components of raw materials and the grain size, and carrying out mixing, molding and heat treatment. The product is conductive to smelting of low-carbon steel and can smelt high-quality pure steel and clean steel and overcome the problems of environmental pollution and shortage of resources caused by using magnesium-chromium bricks for the inner lining of the refining furnace.
Description
technical field [0001] The invention relates to a component distribution ratio of a high-temperature-resistant brick for manufacturing the lining of a steelmaking refining furnace and a preparation method thereof, more specifically, to a component distribution ratio of a low-carbon magnesia-calcium-carbon brick and a preparation method thereof. Background technique [0002] With the improvement of people's living standard and industrial technology level, the demand for some pure steel and clean steel is increasing, which promotes the development of iron and steel smelting technology. The carbon content requirements of some steels are getting lower and lower, and the carbon content requirements of the refractory lining of the refining ladle for smelting low carbon steel and ultra-low carbon steel are also getting lower and lower. For example, the lining of VOD furnaces for smelting stainless steel, mainly use carbon-free fired magnesia-chrome bricks at home and abroad, but be...
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