Efficient stirring method and device for air entrapment-free iron-graphite fusant
A stirring method and melt technology, applied in stirring devices, chemical instruments and methods, transportation and packaging, etc., can solve the problems of gas entrainment and low stirring efficiency, achieve uniform distribution of graphite particles, and solve gas entrainment and low stirring efficiency The effect of technical problems
Inactive Publication Date: 2018-05-04
BEIJING JIAOTONG UNIV
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Problems solved by technology
[0003] The technical problem to be solved by the present invention is to provide a high-efficiency stirring method and device for a non-entrained iron-graphite melt due to the problems of entrainment and low stirring efficiency in the stirring of iron-graphite melt
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment approach 1
[0030] Embodiment 1, under the condition that the power of the high-speed electromagnetic stirring device is 20kW, the rotating speed is 900 rpm, a is 0mm, b is 0mm, c is 0mm, and d is 5mm, after stirring stably for 1 minute and 50 seconds, you can get Iron-graphite melt with no gas entrainment and uniform distribution of graphite particles6.
Embodiment approach 2
[0031] Embodiment 2, under the condition that the power of the high-speed electromagnetic stirring device is 20kW, the rotating speed is 1200 r / min, a is 20mm, b is 20mm, c is 10mm, and d is 10mm, after 2 minutes of stable stirring, no coil can be obtained Iron-graphite melt with uniform distribution of gas and graphite particles6.
[0032] It can be seen that under the premise of utilizing the variable volume graphite crucible to empty and isolate the contact between the gas and the melt, and then under the condition of high power and high speed electromagnetic stirring, the method of the present invention can efficiently prepare iron particles with no entrained gas and uniform distribution of graphite particles. - Graphite melt.
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Abstract
The invention discloses an efficient stirring method and device for air entrapment-free iron-graphite fusant, and belongs to the field of material processing research, including metallurgy, casting and the like. A variable-volume graphite crucible of which the inner wall is distributed with straight blades with a high-speed electromagnetic stirring way to stir an iron-graphite fusant; the variable-volume graphite crucible is used for reducing the volume of the graphite crucible, all gas on the upper part of the fusant in the graphite crucible is evacuated, in addition, the fusant is stirred even if no a gas source is in the presence under a condition that the fusant and external gas are completely isolated, and therefore, fusant air entrapment is avoided fundamentally; the high-speed electromagnetic stirring is used for enabling iron-graphite fusant to generate circumferential high-speed stirring movement under a situation of no air entrapment constraints; the straight blades on the inner wall of the graphite crucible are used for continuously moving the inner iron-graphite fusant to move to periphery and moving the iron-graphite fusant on the upper part to the lower part so as toprevent graphite particles from upwards floating and carrying out central segregation movement, the iron-graphite fusant of which the air entrapment-free graphite particles are evenly distributed canbe efficiently obtained, stirring time can be shortened to 2 minutes, and the technical problem of low air entrapment and stirring efficiency in iron-graphite fusant stirring is solved.
Description
technical field [0001] The invention belongs to the research fields of metallurgy, casting and other material processing, and in particular relates to a high-efficiency stirring method and device for a non-entrained iron-graphite melt. Background technique [0002] In metallurgy, casting and other material processing research fields, it is often necessary to stir various melts, such as metal semi-solid slurry, stirring of particle melts, etc., in order to make the temperature, composition, structure, etc. of the melt uniform change. Stirring efficiency usually depends on the stirring intensity. The greater the stirring intensity, the stronger the shear and turbulence formed, the shorter the stirring time for the melt to achieve homogenization of temperature, composition, structure, etc., and the higher the stirring efficiency. However, strong stirring will lead to the problem of entrained air in the melt, which can easily cause oxidation of the high-temperature melt and the...
Claims
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IPC IPC(8): B01F13/08F27D27/00C22C33/04
CPCF27D27/00C22C33/04B01F33/451B01F2101/26
Inventor 张鹏张伟一杜云慧王玉洁
Owner BEIJING JIAOTONG UNIV