SU1514480A1 - Method of producing barium ferrite powders - Google Patents

Description

The invention relates to powder. The invention relates to powder metallurgy, in particular to methods for producing barium ferrite powders.

The aim of the invention is to reduce the energy intensity of the process.

Example 1

Ferrite-forming components Iron oxides (oxidized scale or other iron-containing substance iron ore concentrates), barium carbonate, kaolin and alloying additives were metered and loaded into capacitive ribbon mixers in a given ratio, from which they were mixed in a continuous flow into a ball mill, where they were mixed, they were grown, and they were grown.

2

metallurgy, in particular to methods for producing barium ferrite powders. The purpose of the invention to reduce the energy intensity of the process. The ferritized mass is ground in a ball mill with a ratio of the volume of ferritized mass and balls to the total mill volume of 1: 2 and the ratio of ferritized mass to grinding balls is 1: 8, with grinding balls having sizes of 100-150; 40-70; 25-30 and 12-24 mm with a mass ratio of 0.5: 0.7: 1.4: 2.4, respectively. The method reduces the energy consumption by more than 2.5 times in the preparation of powder with specific surface BO ⁴ Lee 0.6 m ² / g. 1 tab.

The mixture obtained in a ball mill, dry and wet, was precompacted or granulated and passed to the furnace for ferritization with a flow through at 1050-1200 ° С. The ferritized mass was cooled, crushed {and crushed with the addition of surface-active substances in a ball mill with a mass ratio of powders and grinding balls 1: 8. The balls had diameters of 100-150, 40-70, 25-30, 1224 mm with a mass ratio of 0, 5:: 0.7: 1.4: 2.4, respectively. The ratio of the mass of the mass of powders and grinding balls to the total volume of the chamber of the mill was 1: 2.

Comparative data obtained

in a known manner and proposed,

$ C „„ 1514480

1514480 4

for the grinding stage branded mass presented in the table.

From the data presented in the table it is clear that the proposed method allows more than 2.5 times to reduce the energy costs of producing 1 ton of ferritized mass.

This saves 1420 kWh per 1 ton of finished powder. YU

Said ratio of the working volume of the mill to the total volume, and the ratio of the diameters of the grinding balls, the mass ratio of balls to the milled batch ferritizovannoy 1 are optimal and provide a uniform finished ferrite powder having a specific surface of more than 0, b m ² / g.

Claims (1)

Claim The method of obtaining barium ferrite powders, including mixing the original ferrite-forming components, grinding, granulation, ferritization, grinding of ferritized mass in a ball mill, characterized in that, in order to reduce the energy intensity of the process, grinding is carried out at the ratio of the volume of ferritized mass and balls to the total volume of the mill 1 : 2 and ferritized mass to grinding balls 1: 8, with grinding balls having dimensions of 100-150, 40-70, 2 · 5-30 and 1224 mm with their mass ratio of 0.5: 0.7: 1.4: 2 , 4, respectively. Shredding Produced by Specific Coefficient Weight Set Ratio Ratio Consumption Specific Apply ferric granules the giver surface cient Lares dia singing sewing sculpted ny reading tizovannoy ness ness shrinkage loading trov volume masses power ele move mass (second grinding) t / h 0.6-0.9 m ’/ g 1,151.19 zki mills, t balls in mm and their ratio by weight batch n grinding balls to full volume mills batch and grinding balls ness kw ctroener hyi on grinding 1 t ferritieovanngh granules kWh Famous the way 18-20 consists of three steps 23-26 grinding granules and 28-30 grinding 1.25 0.6 1.17 61 0.3: 0.5: ' 1: 2 1: 5 2800 2220 8 stranded · on vnbrosha- : 0,2 SIC. smooth mills (eight mills) and powder classification. Proposed 1.25 0.75 1.17 55 100-150 ' 1: 2 1: 8 1000 800 1 stranded the way is 40-70 nothing um out of two 25-30 Penalty, ground 12-24 granules 0.5: 0.7: (as in the known method) and : 1.4: 2.4 la on ball mills passing flow without classification (one mill)