Permanent-magnetic hierarchical testing device for content of magnetic substance powder

Abstract

The invention relates to a permanent-magnetic hierarchical testing device for the content of magnetic substance powder. The invention is characterized by comprising the following steps: a. respectively adopting a ferrite magnetic material, a common Nd-Fe-B magnetic material and a high-performance Nd-Fe-B material to manufacture magnetic steel in the same specification size, and adopting a structure mode of clamping a high-permeability yoke sheet between every two adjacent magnetic steel to construct at least two hierarchical magnetic sources in an extrusion mode; b. utilizing a circular medium net or a steel-wool magnetism-collected medium made of high-permeability stainless steel to fill a magnetism-collected medium filling area, i.e., a separation space, wherein the magnetism-collected medium filling the magnetism-collected medium filling area can be arranged from sparsely to densely, and the magnetism-collected medium filling area and the corresponding hierarchical magnetic sourcesform a hierarchical closed magnetic system; and c. adopting a pressure device to drive each hierarchical magnetic source to make reciprocating motion in a cylinder and repeatedly enter or exit the separation space so as to realize the separation, the collection and the measurement of magnetic substances.

Description

technical field [0001] The invention relates to a device for measuring the content of magnetic substances in various industries such as ore dressing, coal preparation and other mineral processing, grain, tea production, etc., and specifically relates to a permanent magnet ladder test device for powder magnetic substance content. Background technique [0002] The rapid development of the national economy has led to more and more demands for mineral resources from all walks of life, and the deep processing and utilization of mineral resources is becoming more and more important; the research on the physical properties of various minerals is the premise and basis for processing and utilization; the content of magnetic substances It is an important content of physical property research. The content of magnetic substances in powder is an index that is of great concern to many industries such as mineral processing, coal preparation, grain and tea production, etc. Determining the c...

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Problems solved by technology

[0011] Although the measurement technology of magnetic substances is relatively mature at present, one type has time-consuming and labor-intensive manual operations, large measurement data errors, and poor reproducibility. Although the other type avoids the above problems, electromagnetic magnetic systems are mostly used, and the equipment occupies less space. The operating costs are high, the structure is complicated, the measurement operation process is cumbersome, and some are even harmful to the experimenters and the environment; at the same time, the background field strength in the sorting area is mostly below 1T, which is difficult to meet the needs of weak magnetic powder measurement; and the magnetic field strength cannot meet Simultaneous determination of the magnetic properties of a variety of different magnetic materials, the adaptability is not strong

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