SU564006A1 - Method for grinding ores and materials containing ferromagnetic components - Google Patents

Description

The invention relates to the field of ores and materials containing ferromagnetic components, mainly in the enrichment of minerals and can be used in the mining industry.

i industries

Methods of grinding ores and materials by falling bodies or by self-grinding in liquid or gaseous media tl are widely known.

There is also known a method of grinding with magnetic separation of a drain in a closed grinding cycle 2}. But these methods do not provide selective grinding; both ore and nonmetallic minerals and their intergrowths are crushed.

The closest solution known is the method of grinding ores and materials containing ferromagnetic components, followed by the removal of the latter in a grinding cycle 3.

However, the known method does not provide selective grinding of ores and materials to their simultaneous enrichment.

in one machine. The selectivity of grinding non-magnetic components and enrichment with this method is achieved by using grinding in a closed cycle. cheni several devices (mill-magnetic separators-classifier). With

In this, the ferromagnetic components circulate through the mill several times, as a result of which they are inevitably over-ground, i.e., their size and quality cannot be controlled. With this method, it is also impossible to create conditions for delaying splices of any size in the area of the grinding bodies before they are opened. Therefore, splices, the size of which is equal to or less than the boundary grain of the classification, go to a further technological process and reduce its effectiveness.

The aim of the invention is to increase the grinding selectivity and the simultaneous enrichment of ores and, materials containing ferromagnetic components in one apparatus, which allows to control the quality of the concentrate and its size. After the goal, the goal is achieved by grinding a ore or a material containing ferromagnetic components to apply a moving magnetic pope to the JU1M, a current of the transporting agent is directed towards KOTOpotvjy. For grinding by the proposed method, mills of conventional construction, made of non-magnetic material with non-magnetic grinding bodies, are used. The workspace is divided into three zones. The raw material is fed to the grinding media where it is crushed. From one stortena, a stream of liquid or gas is supplied to the mill, and towards it, inside the mill along its axis, a magnetic priest is created that continuously runs along its entire length. The flux and the magnetic field regulate a magnitude of 1 o, so that the magnetic field of the force of action of non-ferromagnetic particles prevails over the force of the flux. At the same time, free and ferromagnetic components that appear during grinding are continuously removed from the area of the action of the grinding bodies by the magnetic field to the concentrate. The free and openable nitrous components are subjected to the action of a hydrodynamic (aerodynamic) flow, which is carried out in the anti-flame direction — into the tails. The splices, regardless of their size, are in the zone of action of the grinding bodies until they are fully opened, because the resulting magnetic force of the opposite flow for splices is iniH close to zero. In the rezugi / gate, the ore or material being minted is divided into magnesium (iniTiiyn.) I (magnetically) fraction. Change (jsi oujnx; Tb magnetic field, resumed

Table 1: The rupture of exiting magnetic particles and their quality. An example of the implementation of the method, titanomagnetite ore was crushed in a laboratory mill made of magnetic steel with non-magnetic grinding bodies. Inside the mill, a traveling magnetic field was created, which acted on the windward side of the air flow and was regulated in magnitude within 400-5OO OE. The frequency of the running cycles of the running magnetic field was 10 cycles per minute. The same ore was crushed in a known manner until the components were optimally opened. In tab. Table 1 shows the characteristics of the size, content and distribution of iron in the initial titiomagnetite ore, as well as the grinding products obtained halfway through the known and proposed methods. According to these data, the product crushed by the proposed method contains 2.65 times less than small classes (rib class - 0.074 mm) and 6.75 times more than large classes (class + 0.315 mm. Based on table data The calculation shows that the UM grinding of titanomagnetite ore by the proposed method increases by a factor of 2.65. From Table 2 it can be seen that the quality (by iron content) of the ferromagnetic component obtained by grinding in the proposed method corresponds to the quality of the concentrate after w ore, crushed in a known manner, and the iron content in the non-magnetic component is lower than that in the tailings, with a higher iron recovery.

2.5 i 1,618,027,66 19,0

1.0 + 1,035,726.80 36.3

1.0 + 0.6321.826.11 21.6

1.3 ZN, 4H 1.9

7.5 35.79 io, 4

14.3 34.1 19.1

G1mrg; chsh1ie: Characterization of the size of the shitty material 71a according to the pre-calculated method of calculating the characteristics of the slope of the magnetic and non-magnetisable grinding products.

Feromnie1.

iyo39,658,33 88,0 Concentrate

Neumglite KOMiioiie: ijbi60,4

5.11 12.0 Tails

Initial

D00,026.25 100.0 Source ore

564006

6 Continuation of table 1

T a b II II n and 2

38.4 58.56 85.0

61.66.40 15.0

100.0 26.47 100.0

Claims (3)

ore. The method of grinding allows to exclude the process of magnetic separation with the enrichment of HKVi titanomagnetite ores. The invention of the method of grinding ores and materials containing ferromagnetic components, followed by the conclusion of the latter in a grinding cycle, characterized in that, in order to increase the selectivity of grinding and simultaneous enrichment, a moving magnetic field is applied to the material to be milled agent. HcTOHHHKtf information taken into account during the examination: 1.Id'evich A. GC Equipment plants of silicate industry, Gosstroyizdat, M. 1959, p. 214-215. 2. USSR author's certificate number 42401, cl. B 02 C 13/00, 1933. 3.Ontapenko P.Ye., Semioshko V.M. Novoe in the enrichment of ferrous metals, Nedra. M., 1965, p. 13.