Technical Field

[1] This present invention relates to determination of magnetic ore's grade using with magnetic

powder as pointers in applying magnetic field.

Background

[2] In magnetic separation methods, according to the magnetic susceptibility of the minerals,

enrichment is performed by using high-intensity or low-intensity processes. Separation processes are carried out by drawing the materials in the magnetic field using an electromagnet by taking advantage of the magnetization feature. Cross-band magnetic separator and drum-type magnetic separators have been developed by utilizing magnetic susceptibility from the systems developed in the last century. In the drum-type magnetic separators, the permanent magnet, located in the 3/1 part of the separator, draws the grains with magnetic properties towards the surface of the drum and carries the magnetic minerals upward with the rotation of the drum. At this time, while the magnetic beads are moved away from the magnet, they are removed from the concentrate channel, the non-magnetic beads are not drawn to the drum surface and the separation is taken from the bottom of the separation vessel In this method, the determination of the magnetic grade in minerals is determined depending on the applied magnetic field strength. However, it is not possible to determine the grade differences with sufficient precision. In addition, it is not preferred by investors because the installation cost is high. In the systems developed up to this time, a magnet is used to draw the minerals by applying the magnetic field. Another method is the liquid & hydrostatic separator (FHS) method which cannot pass from the experimental stage to the industry. In this method, when a magnetic fluid is introduced into a non-homogeneous magnetic field, a new density difference is generated due to its density. Since this density difference can be widely controlled, it allows the separation of minerals. Nowadays, it is mostly restricted to the separation of non-ferrous metals from automobile scrap.

Technical Problem and Solutions

[3] The invention will allow for a more efficient and cost-effective production of grade ratio of

magnetically sensitive mines than other magnetic separator systems. This system will decrease the cost of triage labor, and increase the speed of ore detection and thus increase the profit share. This technique provides determination of ores independent from the size while the size differences affect the method in previous systems. Brief Description of Drawings

Fig.1

[4] [fig.1 ] illustrates the isometric view of the system

Fig.2

[5] [fig.2] illustrates the top view of the pool before magnetic field applied

Fig.3

[6] [fig.3] illustrates the state of magnetic powders around the lower grade ore and the higher grade ore in the magnetic field

Fig.5

[7] [fig.5] illustrates electronic output of the system

Fig.6

[8] [fig.6] illustrates the flow chart of the technique

Fig.7

[9] [fig.7] illustrates the magnetic field curves with pulling effect theory

( magnetization )

Brief Description of References in Drawings

[10] 1 : Processing pool ( metal sheet can be preferred )

[11 ] 2: Ore ( has high magnetic susceptibility, average diameter higher than 2 cm, etc. manganese, iron, chrome ores )

[12] 3: Auxiliary fluid ( water or high density liquid solutions )

[13] 4: Magnetizable powder particles ( grain size lower than 3 mm )

[14] 5: Magnetic field applying machine ( for 1 square meter )

[15] 6: In magnetic field, status of magnetic powders around ore having relatively low grade [16] 7: In magnetic field, status of magnetic powders around ore having relatively high grade

[17] 8: Color output of relatively low grade ore electronic output

[18] 9: Color output of relatively high grade ore electronic output

[19] 10: The pulling effect ( magnetization )

[20] 11 : Ferromagnetic, ferrimagnetic or magnetizable material in magnetic field

Detailed Description of Invention

[21 ] Magnetic Pointers Technique (MPT) is an enrichment process for the precise detection of the degree of grade of ores (2) with magnetic sensitivity. It is consist of a ore pool (1) filled with homogeneous mixed liquid (3) with magnetic powders (4), the magnetic field device (5) at the sides of the pool and the detection camera at a certain height from the pool. Process is related to the magnetization of magnetic powders (4) within the pool (1) and attracting the powders to ores (2) by applying magnetic fields in the pool to large ores of 2 cm diameter aligned in the pond with specific mechanical systems. The formation of the technique is based on the theory of magnetic field lines and the principles of magnetization (pulling effect) (10). According to the theory, the magnetism formed in the magnetic field is in the opposite direction of the poles forming itself. The pulling effect (10) is thus formed. Another material (11) with high magnetic sensitivity causes discontinuities in the magnetic field flux and shows a pulling effect (12). With this pulling effect, small grain sized magnetizable powders (4) can be drawn around the magnetized ore (2).

[22] Magnetic susceptibility varies according to the density of the magnetic compound in the ore (2).

These differences change the magnetizing effect (10) for each ore stone and can attract magnetic powders (4) in a larger amount (7) or in a relatively lower amount (6) according to the differences in magnetic compound. Relatively higher grade ore (2) attracts more magnetic powder (4). It allows fine grading of the ores in certain directories to be made precisely (40.69% etc.).

[23] Magnetic field is applied to the auxiliary liquid (3) mixed with the magnetizable powder (4) and to the ore which is carried by mechanical systems to the pool (1), at the same time. With the applied magnetic field, the magnetizing effect is seen in the ore (2). The same effect occurs in the magnetic powder in the liquid (3) and magnetic powder (4) deposits around the ore (2) are observed. The amount of these deposits varies according to the density of the magnetic compound in the ore (2) and gives relative information on the amount of grade.

[24] With this information obtained, it becomes heterogeneous in the liquid-powder mixture and

enables to be determined according to the difference of color intensity. Powder (4) in the liquid (3) to accumulate more around the powder (2) is observed more intense powder color. According to the sensitivity of the process, this color intensity can be distinguished by the eye or transferred to the electronic media by camera and can be mapped (8, 9) and mapped according to the ore index.

[25] Information transferred to the electronic environment is standardized according to the magnetic sensitivity in the ore (2). The liquid-powder mixture can be adjusted by taking into account the color intensity, the amount of magnetic powder in the mixture and the ratio of magnetic compound in the ore (2). Thus, when the measuring range is increased, the sensitivity of determination for ore's magnetic grade is increased. For example, in the manganese ore having a content of 40.69% MgO which is magnetizable compound, the color-density of the liquid-powder mixture for the detection of this compound can be defined by a specific code into the electronic environment. Defined code is referenced for the next ore stone and a specific scale can be generated using this reference.

[26] The Magnetic Pointers Technique (MPT) is the technique of detecting magnetic sensitivity by using the magnetization of two different magnetic materials, one large and one small in the magnetic field. In this method, the detection of magnetic sensitivity in the ore is provided by the use of auxiliary fluid and pool.

Industrial Applicability

[27] Magnetic Pointers Technique (MPT) is applied on ores with a magnetic sensitivity and greater than 2 cm in diameter. The system can be applied on materials that can be magnetized such as iron ores, manganese, chromite and materials magnetized in magnetic field. Substances such as water and oil may be used as auxiliary liquids. For the installation of the system, a pool should be integrated for the purpose of liquid transport. With simple mechanical processes, low-cost plants can be designed for the ore that are brought to a certain index.