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225 results about "Pulse electromagnetic field" patented technology

High-speed steel roll and preparation method thereof by centrifugal compounding in electromagnetic field

The invention relates to a high-speed steel roll and a preparation method thereof by centrifugal compounding in an electromagnetic field, belonging to the technical field of preparation of the high-speed steel roll. The components of a working layer material of the high-speed steel roll are as follows (in weight percent): 1.5 to 2.5 percent of C, 4.0 to 6.0 percent of V, 4.0 to 6.0 percent of W, 1.5 to 4.5 percent of Mo, 2.0 to 4.0 percent of Cr, 0.04 to 0.18 percent of Zr, 0.001 to 0.003 percent of B, less than or equal to 0.5 percent of Si, less than or equal to 0.5 percent of Mn, and the balance of Fe and impurity elements; and in the impurity elements, the required contents of S, P and O are respectively less than 0.01 percent, less than 0.01 percent and less than 0.0010 percent. The roll is cast by adopting a centrifugal compounding method in a pulse electromagnetic field, the frequency of the pulse magnetic field is 0.1 to 10Hz, and the peak strength of a central magnetic field of a cast mold is 1 to 10T. The roll has a plurality of precipitation strengthening phases, and the applied pulse magnetic field leads the strengthening phases and matrix crystal grains to be refined effectively and leads the strengthening phases to be distributed in a dispersed manner, thus overcoming the segregation of alloy elements and greatly improving the performance of the roll.
Owner:JIANGSU UNIV

Floating agglomeration electromagnetic concentrating equipment

InactiveCN104815753AEfficient removalAvoid the phenomenon of running blackMagnetic separationEngineeringNon magnetic
The invention provides floating agglomeration electromagnetic concentrating equipment. The lower end of a cylinder is provided with a concentrate discharging port or connected with a concentrate discharging pipe, a discharging port of a feeding pipe extends into the cylinder and is positioned on the middle upper portion in the cylinder, an output port of a micronano bubble generating device is communicated with an inner cavity of the cylinder tangentially and corresponds to the discharging port of the feeding pipe in position, an alternating magnetic field generator is positioned on the periphery of the cylinder and provides a nonuniform alternating magnetic field, and an overflow tank is positioned above the cylinder and communicated with the upper end of the cylinder. The equipment can generate a lot of micronano bubbles, especially nano bubbles, and the micronano bubbles and the alternating pulse electromagnetic field jointly act to enable magnetic or strongly-magnetic minerals and nonmagnetic or weakly-magnetic gangue minerals in material ore pulp to be in dispersion, agglomeration, re-dispersion and selective agglomeration respectively so as to enable the nonmagnetic or weakly-magnetic gangue minerals to thoroughly break away from a magnetic chain finally, so that escape of tailings is avoided effectively, and high-grade magnetic iron concentrate or titanomagnetite concentrate is obtained finally.
Owner:INST OF MULTIPURPOSE UTILIZATION OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI
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