Device and method for measuring thermal conductivity and frictional resistance of slag film
A technology of friction resistance and measurement method, which is applied in the field of measurement devices for slag film thermal conductivity and friction resistance, can solve the problems of lack of slag film thermal conductivity characteristics and friction resistance measurement devices, and achieve simple structure, convenient operation and high measurement accuracy Effect
Active Publication Date: 2018-08-31
SHAANXI LONGMEN IRON & STEEL
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Problems solved by technology
At the same time, the structure of the slag film determines the lubrication between the billet shell and the mold, which in turn has a direct impact on the determination of the billet drawing force and the occurrence of cracks in the billet shell. Therefore, there is still a lack of unified thermal conductivity and friction resistance measurements of the slag film. device, therefore, it is of great significance to develop such equipment
Method used
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Embodiment 1
[0056] MC and LC are respectively used to represent medium-carbon steel mold flux XLZ-13 for wide and thick plates in a domestic steel mill and Xibao high-speed large-slab low-carbon steel mold flux MXB2D1, and their physical and chemical properties are shown in Table 1.
[0057] Table 1
[0058]
[0059] Add the slag material into the groove, and then heat it through the heating device. It is found that the slag film is divided into the surface layer and the bottom layer. The surface layer of the slag film is separated from the bottom layer. pores, and firmly combined with the slag removal element 3. Therefore, the molten mold slag cools rapidly after contacting the copper probe 4 to form a glass phase substance, while the molten slag farther away from the copper probe 4 cools relatively slowly, and there is enough time for crystallization to form a polycrystalline phase substance. It can be deduced from the experiment that the mold flux film between the crystallizer and ...
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Abstract
The invention discloses a measuring device and a measuring method for heat conductivity and frictional resistance of slag films. The measuring device comprises a temperature acquisition module, a computer, a cold-water inlet pipeline, a cold-water outlet pipeline, a slag melting element, a heating device, a vapor chamber, a copper measuring head, a first driving device, a force measuring device and a second driving device. The first driving device is used for driving the copper measuring head to move up and down. The force measuring device is used for measuring horizontal push-pull force received by the copper measuring head. The second driving device is used for driving the copper measuring head to swing leftwards and rightwards. By the measuring device and the measuring method, the heat conductivity and the frictional resistance of the slag films can be measured accurately.
Description
technical field [0001] The invention relates to a measuring device and method, in particular to a measuring device and method for thermal conductivity and frictional resistance of a slag film. Background technique [0002] The most important part of the mold heat transfer in the continuous casting process is the heat transfer between the solidified slab shell and the copper wall, especially the heat transfer in the area near the meniscus. The thermal process plays a decisive role and directly affects the surface quality of the slab. [0003] There is a mold slag film between the mold slag added in the continuous casting process and the mold wall. The heat transfer process in the mold includes: heat transfer between the central molten steel and the solidified billet shell, heat conduction in the billet shell, billet shell and mold slag The heat transfer of the film, the heat transfer of the air gap between the slag shell and the copper wall of the crystallizer. The growth o...
Claims
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IPC IPC(8): G01N19/02
CPCG01N19/02G01N25/20
Inventor 赵俊学牛亮葛蓓蕾仇圣桃刘诗薇唐雯聃李小明施瑞盟
Owner SHAANXI LONGMEN IRON & STEEL