SU948457A1

SU948457A1 - Magnetically hard bodies separation method

Info

Publication number: SU948457A1
Application number: SU803214065A
Authority: SU
Inventors: Виктор Львович Балкевич; Владислав Андреевич Дубов
Original assignee: Государственный Научно-Исследовательский Институт По Керамзиту
Priority date: 1980-12-10
Filing date: 1980-12-10
Publication date: 1982-08-07

Description

1one

Изобретение касаетс обогащени полезных ископаемых.The invention relates to mineral processing.

Известен способ сепарации частиц по величине их коэрцитивной силы, включающий их размагничивание под воздействием переменного магнитного пол с последующим разделением на две фракции иЗ There is a method of separation of particles according to the magnitude of their coercive force, including their demagnetization under the influence of an alternating magnetic field, followed by separation into two fractions and

Недостатком такого способа вл етс неоднородность магнитных свойствJQ бо фракци х.The disadvantage of this method is the heterogeneity of the magnetic properties of the JQ bo fraction.

Наиболее близким по технической сущности и достигаемому результату к предлагаемому способу вл етс способ сепарации магнитожестких тел, 15 включающий намагничивание до насыщени и обработку переменным магнитным полем 2.The closest in technical essence and the achieved result to the proposed method is the method of separation of magnetic-rigid bodies, 15 which includes magnetization to saturation and processing with an alternating magnetic field 2.

Недостатком этого способа вл ет с неустойчивость магнитных свойств 20 тел к воздействию переменного маг нитного пол .The disadvantage of this method is the instability of the magnetic properties of 20 bodies to the effects of a variable magnetic field.

Целью изобретени вл етс обеспе чение устойчивости магнитных свойств .The aim of the invention is to ensure the stability of magnetic properties.

тел к воздействию переменного магнитного пол .bodies to the effects of an alternating magnetic field.

Эта цель, достигаетс тем, что магнито}{ (е :ткие тела после намагничивани раздел ют по крупности и нагревают, причем обработку переменным магнитным полем ведут при напр женности 25- 60 кА/м, а нагревание тел - до температуры на 100-200°С ниже точки Кюри.This goal is achieved by the fact that magneto} {(e: after the magnetization bodies are divided by size and heated, and the treatment with an alternating magnetic field is carried out at a intensity of 25-60 kA / m and the bodies are heated to a temperature of 100-200 ° C below the Curie point.

Предложенный способ осуществл ют следующим образом.The proposed method is carried out as follows.

Магнитожесткие тела намагничивают до насыщени при напр женности магнитного пол 500 кА/м, раздел ют по крупности на ситах с отверсти ми 10,5 и 3 см и нагревают до темпера уры На 100-200С ниже точки Кюри.Magnetic bodies are magnetized to saturation with a magnetic field strength of 500 kA / m, divided by size on screens with openings of 10.5 and 3 cm and heated to a temperature of 100-200 ° C below the Curie point.

Claims

Each class is treated with an alternating magnetic field in the device, holding the open chamber, divided by a partition of 20 cm in height into two sections, and a magnet system placed above the cam, and the material being processed is placed in one section of the chamber. Under the action of an alternating magnetic field, the magnetized bodies rise to a certain height, acquiring a rotational motion, and a part of them, possessing sufficient energy, moves to the second section of the chamber. The bodies remaining in the first section are sequentially processed for 30 with an alternating magnetic field in similar devices with wall heights corresponding to 15; 10.5 and 3 cm, obtaining fractions differing in coercive force. Separating magnetic hard bodies before processing them with an alternating magnetic field allows obtaining fractions for which the influence of this parameter on the change in the magnetic properties of the bodies during the processing is excluded. Heating magnetic hard bodies at a temperature of 100-200s below the Curie point makes it possible to stabilize the magnetic properties of bodies at a specified temperature. Sequential separation by size, heating and magnetic treatment of the obtained classes allows to obtain fractions of solid magnetic bodies with uniform magnetic properties, resistance to the action of an alternating magnetic field and heating, which provides an increase in the efficiency of the grinding process, using them quality grinding media, rotating in an increase in the specific surface of the grinding product. Claim 1. A method of separating magnetically rigid bodies, including magnetization to saturation and processing with an alternating magnetic field, characterized in that, in order to ensure the stability of the magnetic properties of bodies to an ac magnetic field, the magnetically rigid bodies after magnetization are divided by size and heated. 2. Method pop.1, which is also distinguished by the fact that the treatment with an alternating magnetic field is carried out at a intensity of 25-60 kA / m. 3.Crioco6 according to Clause 1, from the fact that the heating of the bodies is carried out at a temperature of 100-200 C below the Curie point. Sources of information taken into account in the examination 1. V. Karmazin. Magnetic regeneration and separation in the enrichment of ores and coals. M., Nedra, 1968, pp. 21-30,.

2. USSR author's certificate number 668703, cl. At 03 C 1/00, 197 (prototype).