SU632741A1 - Method of placing charge on sintering machine - Google Patents

Description

one

The invention relates to the field of metallurgical raw materials, such as sinter, and can be used in the steel industry.

There is a known method of stacking the agglomerate on an sintering machine, in which the loading of the agloshmht on sintering carts is controlled by the segregation value of the material by changing the shorts of the drum stacker. Due to the different trajectory of movement of particles of unequal mass during loading, the necessary distribution of the charge components over the height of the layer jj is obtained.

However, under real conditions, when the ratios of the components in the charge vary, its moisture content, particle size distribution, and physical properties change. These circumstances make it necessary to select the optimum rotational speed of the drum stacker in each particular case, which leads to considerable difficulties in operation. Due to the fact that the fuel practically does not pelletize and has a minimum bulk density, with this method of loading, its main amount accumulates in the upper part of the layer, which is not possible in all cases

recognize expedient. A similar phenomenon is observed for flux additives.

The closest in technical essence and the achieved result is the method of loading with an increase in the magnetic susceptibility along the height of the layer. 2. The disadvantages of this method include the fact that when

loading of the layer does not show a significant increase in gas permeability and does not provide a rational distribution of components by chemical and granulometric composition, and e-iovsy does not create conditions for improving the physical and physicochemical properties of the cake.

The aim of the invention is to increase the gas permeability of the layer and improve the quality of the agglomerate.

This is achieved by laying the Egshta on the sintering carts of the sintering machine with two or a few more layers with different magnetic

susceptibility, respectively 1,515 and 6-15.

After mixing, wetting and pelletization of the charge layer by layer under the influence of a magnetic field

Claims (2)

on sintering trolleys depending on the magnetic susceptibility of the components. Large components (represented by hematite ore, lumps containing ores, of which other components are known) have a reduced magnetic susceptibility and a greater mass — they are first placed on the grate carts of the sintering carts. Having a charge of charge with a higher magnetic susceptibility is carried along by the magnetic field and placed on the surface of the weak magnetic layer. By installing two or more units on one agglomachine (as in layer-by-layer loading under the usual conditions) for loading the feeds, under the influence of a magnetic field it is possible to carry out a multi-layer logging. The ratio between the heights of the separated layers (weakly magnetic and with increased magnetic susceptibility is regulated by the strength of the magnetic field, as well as by the location and distance of the magnets from the flux surfaces of the SILTS. The ratio between the heights of the individual layers (increased and abnormally susceptible) should be in 1.5 to 15, and the residual magnetic, intensity - from b to 15. The components of the sintering plant, such as concentrate magnetic enrichment, in-ozvrat, onlochnova dust and sludge of individual products The properties are ferromagnetic substances of varying degrees, while hematite ore, limestone, lime, solid matter — do not have these properties. It is also known that the distribution of components in the mixture is even, and, as confirmed by research, the magnetic granules of the mixture of This makes it possible to divide the entire charge into streams with different magnetic susceptibility and, by means of technological methods, lay it on the grate so that the distribution of different granules charge, fuel and fluxes provided the most favorable conditions for the sintering process. The proposed method of laying the charge on sintering carts can be applied in sintering production without significant capital expenditures, using magnets with a variable or permanent magnetic field that must be installed (for example, inside the feeder drum or in a drum installed instead of an inclined tray) before loading the charge on the grate of the sintering machine. This will reduce the consumption of solid fuel up to 10% of the total and increase the strength of the spec by 9% (relative). The method of laying the charge on the sintering machine, including layer-by-layer distribution of the material with increasing magnetic susceptibility over the height of the layer, characterized in that, in order to increase the gas permeability of the layer and improve the quality of the agglomerate, the ratio of each subsequent layer to the previous one is equal to 6- 15 and 1.5-15. Sources of information taken into account in the examination: 1. US patent number 3491990, cl. 263-28, 1969. 2. The copyright certificate in application 1765108, cl. F 27 B 21/00, 1972.