SU827927A1 - Shaft durnace discharging device - Google Patents

Description

unloaded pieces. In addition, the use of the grid complicates the design of the entire device, since it is an independent mechanism. Placing the grate in the high temperature zone contributes to intensive wear, so it must be made of special materials, heat-resistant and carbide. Additional cooling of the grate is necessary, the replacement and repair of the grates are difficult due to the fact that it is in the furnace and is in contact with the material. In addition, the design of the known device for unloading materials from the shaft furnace is such that it does not prevent the direct pieces of lime from striking the transporting rolls, which leads to their crushing and abrasion of the surface of the rolls.

The aim of the invention is to increase the yield by reducing its crushing during unloading, as well as increasing reliability and durability in operation.

This goal is achieved by the fact that on the inclined walls of the discharge funnel there are cylindrical grooves with a radius equal to the radius of the drums that block the outlet openings of the shaft and located in the cylindrical grooves so that their longitudinal axis lies in the plane of the inclined walls.

 The invention is explained in the accompanying drawings.

FIG. 1 shows a general view of the device; in fig. 2 - section A-A of FIG. one; in fig. 3 - node I of FIG. 2

The unloading device of the shaft furnace 1 consists of drums 2, horizontally disposed on inclined walls 3 discharge funnels 4, and drive 5. Each drum 2 has a water-cooled shaft 6 mounted on bearings 7, a faceted barrel 8, seal assemblies 9 in the frame 1 and node 10 outlet and supply of cooling water. The drums are arranged in pairs in each discharge funnel 4 with the possibility of counter-rotation and are recessed in the inclined walls 3 of the discharge funnels 4 half the diameter of the barrel 8. The magnitude of the depth of the drum is set in each case, depending on the size of the pieces of material and the angle of its natural slope. In this case, the diameter, width of the outlet orifice and the distance from the barrel 8 to it are chosen in such a way that the forming angle of its natural slope of the material does not go beyond the limits of forming the angle ai of the location of the material on the drum. This achieves material retention in the shaft of the furnace 1 with non-rotating drums. The distance from the drum 8 of the drum to the roof 11 of the discharge funnel 4 must be greater than the thickness of the layer of material captured by the drum as it rotates, in order to prevent the material from rubbing against the arch. The distance between the forming drums should be greater than two thicknesses of the layer of material to eliminate

friction and grinding of the material when dropping it into the outlet of the discharge funnel 4.

The device works as follows.

Hot material from the shafts through the outlet opening along the inclined walls 3 of the discharge chambers 4 post-falls onto the drums and is held onto them with non-rotating drums. While rotating

the drums in the direction of the arrows (see Fig. 3) the layer of material is freely dropped into the discharge funnel 4, and its place is filled with new portions of the material coming from the mines. The discharge speed can be adjusted by means of the actuators 5.

P1zobredenie allows you to reduce the dimensions of the shaft furnace and thereby reduce costs, increase the percentage of yield of the product by reducing the percentage of fines, increase the productivity of the furnace by lengthening the interredulent periods and eliminating accidental breakdowns of the discharge mechanism, reduce

operating costs.

Claims (2)

1. The discharge device of the shaft furnace, containing drums with protrusions cylinder generators, arranged in pairs in the discharge funnel under the outlets, and rotational drives, due to the fact that, in order to increase the yield rate by reducing its grinding during unloading, increase reliability and durability in operation , on the inclined walls of the discharge funnel, cylindrical grooves with a radius are made, equal to the radius of the drums in which the drums are located. 2. A device according to claim 1, characterized in that the longitudinal axis of the drums lies in the plane of the inclined walls. Sources of information taken into account in the examination 1. USSR author's certificate No. 549663, cl. F 27B 1/20, 1977. 2. Patent of Germany, cl. 31a 1/20, 1929. ten T T / ul 14 1 -L- / Y g / ng - - "- 1 / / / 4 4 FIG. I / 3 / 41, -): If u | and 11 Phage. g ./four