MgO-SiC-C work lining brick for one-tank ladle and preparation method
A technology of working lining and molten iron, which is applied in the field of refractory materials, can solve the problems of easy damage and low service life of refractory materials, achieve excellent resistance to molten iron erosion, improve service life, and reduce carburization effects
Inactive Publication Date: 2017-03-15
北京利尔高温材料股份有限公司
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Problems solved by technology
[0009] The invention provides a MgO-SiC-C working lining brick for one-pot ladle and its preparation method, which solves the problems that the existing refractory material for one-pot ladle is more easily damaged and has a lower service life
Method used
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Effect test
Embodiment 1～5
[0031] The preparation method of MgO-SiC-C brick in each embodiment is as follows:
[0032] (1) Co-grinding and pre-mixing magnesia fine powder, SiC fine powder, antioxidant, and high-temperature asphalt to prepare co-milling powder and bagging for later use;
[0033] (2) Add magnesia particles and SiC particles into the mixer and mix for 3-5 minutes, add thermosetting phenolic resin binder and mix for 5-8 minutes, then add flake graphite and mix for 8-10 minutes, and finally add pre-mixed co-milled powder for mixing After 20-30 minutes, after a certain period of time, press the semi-finished product with a 630t screw press, and dry it in a drying kiln at 150-200°C for more than 12 hours.
[0034] The weight components of the raw materials in Examples 1-5 are shown in Table 1, and the performance test results of the MgO-SiC-C bricks prepared in Examples 1-5 are shown in Table 2.
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Abstract
The invention discloses an MgO-SiC-C work lining brick for a one-tank ladle and a preparation method, and belongs to the technical field of fire-resistant materials. The MgO-SiC-C work lining brick is prepared from, by weight, 45-65 parts of high-purity magnesia particles, 0-10 parts of silicon carbon particles, 10-20 parts of fine fused magnesia powder, 5-15 parts of fine silicon carbon powder, 5-15 parts of crystalline flake graphite, 0-3 parts of antioxidants, 0-3 parts of high-temperature asphalt and 2-5 parts of binding agents. Aggregates and substances of the lining brick mainly are magnesia, a principal crystalline phase of the magnesia is periclase, the melting point of the periclase reaches 2800 DEG C, the periclase has excellent high-temperature performance, residual linear expansion of materials is improved, rapid erosion and metal-leakage defects caused by wide brick gaps are avoided, the periclase has excellent advantages of resisting basic slag, and the service life of a slag line portion is greatly prolonged.
Description
technical field [0001] The invention relates to the technical field of refractory materials, in particular to a MgO-SiC-C working lining brick for making a ladle of molten iron and a preparation method thereof. Background technique [0002] The transportation of molten iron in large and medium-sized iron and steel plants generally adopts the production organization mode of blast furnace→torpedo tanker→ladle→converter. Although this mode has many advantages such as good maneuverability, small temperature drop of molten iron, and functions such as pretreatment of molten iron, adjustment of temperature and composition of molten iron, and buffering, it is incompatible with the goal of high efficiency and low energy consumption pursued by modern metallurgical processes. There is still a certain gap. It is mainly manifested in many aspects of molten iron transportation, low production efficiency, high energy consumption, poor three-off effect, large one-time investment, and high ...
Claims
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Patent Timeline
Login to View More IPC IPC(8): C04B35/66C04B35/043C04B35/634C04B35/63
CPCC04B35/043C04B35/63C04B35/63496C04B2235/3826C04B2235/425C04B2235/77C04B2235/96
Inventor 郭钰龙张晗赵伟刘丽任林刘靖轩戚腾飞朱力舟徐福禹张晓波胡玲军曹仁锋车晓梅刘美荣于九利黄健王伟伟王团收赵现华
Owner 北京利尔高温材料股份有限公司