Industry new

Development and Experimental Study of Soft Magnetic Alloy

The development of soft magnetic alloy and its experimental research In China's more than 50 billion tons of iron ore reserves, magnetite accounts for about 2/3. At present, electromagnetic stainless steel still plays a dominant role in the beneficiation production of iron core materials for electromagnetic valves in China. This situation is one of the main reasons that the average grade and recovery rate of magnetite concentrate in China is lower than that of foreign countries. Permanent magnetic drum type magnetic separator can't effectively remove high-grade concentrates because it can't remove the contiguous body and monomer gangue mixed in magnetic agglomeration effectively; the fine screening process is more effective, but the screening efficiency is too low, and it needs Fine grinding, excessive smashing phenomenon, easy to cause metal loss, energy consumption; magnetite coarse concentrate anti-flotation process can obtain high-grade concentrate, but there are high costs, environmental pollution and other issues; magnetic column selection, etc. The industrial practice of the new magnetic separation equipment proves that high-grade concentrates can be obtained, but there are still many deficiencies that restrict their wide-range application, such as large water consumption, strict requirements on the size of the ore, and only suitable for selected operations. There is an urgent need for improvement and improvement. There is no doubt that the magnetic separation method is the most economical, simplest, most feasible, and less polluting method for selecting ferromagnetic minerals. Therefore, the research, development and application of new-type high-efficiency magnetic separation equipment are the key. The magnetic separation ring column studied in this paper absorbs the essence of the magnetic column design in the structure. The electromagnet magnetic system is used in the rough selection zone. This equipment has the advantage of being able to adapt to coarse grain feeding. The selected area inherits the magnetic column. The advantages of high sorting accuracy have made beneficial attempts to expand the range of use of highly efficient selection equipment and have achieved good results. In this paper, the magnetic field characteristics and sorting principle of the magnetic separation column were studied, and the structural parameters and operating parameters of the magnetic separation column were optimized experimentally. At the same time, the actual ore sorting experiments were carried out. The best position of the center of the yoke at the lowermost end of the rough selection zone is 2 cm downward with respect to the upper edge of the inner cylinder, and the optimal spacing of the electromagnet ring yoke is 4 cm; under the optimum conditions of the magnetic structure parameters of the electromagnet in the rough selection zone, the best selection The location and spacing of the excitation coils in the zone have a certain influence on the sorting effect, but it is not very obvious. The best position is 7.7 cm downward with respect to the upper edge of the inner cylinder, and the optimal spacing is 4 cm. The soft magnetic alloy is used to sort out the graded overflow products of the slab stone concentrator. The content of the ore is -44.40mm and the content is 44.6%. The actual particle size range is -0.7mm to 0mm, and the ore grade is 27.60%. The good index of concentrate grade 54.44%, tailing grade 6.76%, tailings yield 56.3%, and recovery rate 86.21% was obtained, and the tailings consisted of monolithic gangue and a very small amount of lean connectives.

PREVIOUS：Basic categories and main applications of sofNEXT：Magnetic Field Application Technology of Supe