Yüksek Gradyanlı Manyetik Filtrasyon için Paketlenmiş Ferromanyetik Yataklarda Mıknatıslanma Davranışının Analitik Olarak Tahmin Edilmesi

Öz

Manyetik filtreler, endüstriyel sıvı ve gazlardan düşük konsantrasyonlu ve mikron altı boyutlardaki manyetik parçacıkların uzaklaştırılmasında etkili bir şekilde kullanılmaktadır. Manyetik filtrelerin matrisleri, dış manyetik alan altında kolayca mıknatıslanabilen ve çeşitli geometrilere sahip ferromanyetik dolgu malzemelerinden (bilyeler, çubuklar, plakalar, metal talaşları vb.) oluşur. Dolu yatakların gözeneklerinde oluşan yüksek gradyanlı manyetik alanların hesaplanması ve bu alanların oluşturduğu kuvvet etkisinin belirlenmesi, manyetik filtrasyon ve ayrıştırma süreçlerinin teorisi ve mühendislik uygulamaları açısından kritik öneme sahiptir. Gözeneklerin çok küçük olması nedeniyle bu bölgelerdeki manyetik alan şiddetinin doğrudan ölçümü ve değerlendirilmesi oldukça zordur. Bu nedenle, mıknatıslanmış dolu yatakların modellenmesinde çeşitli yaklaşık yöntemler kullanılmaktadır. Bu çalışma, öncelikle ferromanyetik bilyelerden oluşan dolu yatakların mıknatıslanma karakteristiklerini incelemektedir. Bu tip dolu yatağın temel mıknatıslanma eğrilerinin analitik ifadeleri elde edilmiştir. Elde edilen ifadeler, mühendislik uygulamalarında hesaplamalara kolayca entegre edilebilecek bir biçimde formüle edilmiştir. Teorik hesaplamalar, literatürdeki bazı deneysel sonuçlarla karşılaştırılmış ve bu formüllerin manyetik filtrelerin tasarımı, kontrolü ve optimizasyonunda kullanımı için öneriler sunulmuştur.

Anahtar Kelimeler

• manyetik filtre
• ferromanyetik malzeme
• dolu yatak
• gözeneklilik
• manyetizasyon

Analytical Estimation of Magnetization Behavior in Packed Ferromagnetic Beds for High-Gradient Magnetic Filtration

Öz

Magnetic filters are effectively used for the removal of low-concentration and submicron-sized magnetic particles from industrial liquids and gases. The matrices of magnetic filters are composed of ferromagnetic fillers (balls, rods, plates, metal shavings, etc.) that can be easily magnetized in an external magnetic field and have various geometries. Calculating the high-gradient magnetic fields formed in the pores of the filled beds and determining the force effect are crucial for the theory and practice of magnetic filtration and separation. Due to the tiny size of the pores, direct measurement and evaluation of magnetic field intensity in these regions are challenging. Therefore, various approximate methods are employed to model magnetized filled beds. This study primarily investigates the magnetization characteristics of filled beds composed of ferromagnetic balls. The analytical expressions of the main magnetization curves of this type of filled bed have been obtained. These expressions have been formulated in a way that can be easily used in engineering practice calculations. The theoretical calculations obtained have been compared with some experimental results from the literature, and recommendations have been made for the use of these formulas in the design, control, and optimization of magnetic filters.

Anahtar Kelimeler

• magnetic filter
• ferromagnetic material
• packed bed
• porosity
• magnetization

Kaynakça

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