SU1063842A1 - Furnace for thermal treatment of bulk materials - Google Patents

Abstract

FURNACE FOR THERMAL TREATMENT OF BULK MATERIALS, containing a working chamber, a comb bottom with inclined tuyeres, devices for loading and unloading of material, dmmootvod and water cooled disintegrator with rippers, which, in order to improve the performance of the furnace, the grinder is made of shafts with shafts, which is made of pans, which is made of pans, which is made of pans, which is made of pans, which is made of pans, installed with the possibility of reciprocating movement along the longitudinal axis towards it is opposite by a bow, and 9 (L 11, SN.

Description

The invention relates to the thermal treatment of bulk materials in reducing, oxidative or neutral media, in particular to the reduction firing of KOBfcJX ore used for fermentation in black iron. A known furnace for the treatment of iron-containing material in a countercurrent gas, consisting of a lined chamber, in the hearth of which are tuyeres for supplying gas and air, a gas removal system, a device for loading ore into the furnace, chambers for reducing ore located at the end of the furnace below its hearth and the device for unloading burnt ore. The unloading device in this furnace consists of a fixed grate attached to the lower part of the post-recovery chamber and a lower carriage mounted on a pad under the fixed grate. The stationary grate consists of several beams installed at a certain distance from each other so that between them are formed, the slots An of the passage of the burnt ore. The movable carriage has the same slots for the passage of the ore and is equipped with a displacement drive. Through the slits of the fixed grid and the moving carriage, which performs a reciprocating motion, the baked ore is unloaded from the refurbishment chamber l. A disadvantage of this device is that the ore located in the refurbishment chamber with the temperature before, periodically bakes and passes from bulk state to monolithic mass. Large pieces of sintering ore do not pass through the slits of the lattice, due to which unloading of the burnt ore from the furnace is stopped. In order to resume normal operation of the furnace, it is necessary to free the recovery chamber from the sintered mass. To do this, the material and fuel supply to the furnace is stopped, the movable carriage is rolled out of the restoring chamber, and the scraping ore (specks) is destroyed by hand from the bottom through the slots of the fixed grid. The destruction of cakes through the slits of the lattice is a very laborious operation that does not meet safety standards, since the material above the mass has a temperature of up to which can fall down through the lattice at any moment. In addition, the destruction of cakes in this way takes a long time, which causes prolonged downtime, dramatically reducing the productivity of the furnace. Closest to the proposed technical essence and the achieved result is a furnace for heat treatment of bulk materials, containing a working chamber, a comb hearth with inclined tuyeres, devices for loading and unloading material, a chimney, and a water-cooled ripper with rippers. The unloading unit of this furnace consists of a fixed grid, a movable carriage and a mattress mounted above the fixed grid and designed to destroy the specs. The spear breaker is a water cooled shaft / passing through the ore reduction chamber, supported on bearings outside the chamber. Along the length of the chamber, eight shafts are installed, which have the ability to rotate 90 ° in both directions with the help of levers mounted on each shaft and a drive connected tightly to all levers. Nozzles are installed on each shaft, which destroy the specs 2. However, spekolomatoel shafts are exhausted because of the ORE filling in the space between them and the fixed grid, which leads to unplanned stoppages of the furnace and a decrease in its productivity. The purpose of the invention is to increase; furnace performance. This goal is achieved by the fact that in a furnace for heat treatment of bulk materials containing a working chamber, a comb bottom with inclined tuyeres, devices for loading and unloading material, a smoke outlet and a water cooled broom ripper with rippers, the grinder is made of triangular rods installed with the possibility of reciprocating movement along the longitudinal axis towards each other. Figure 1 shows a furnace, a longitudinal section; on. FIG. 2 is the same cross section, in FIG. 3, a furnace without a fixed grid, a cross section; FIG. 4 and 5 - diagrams of the device. The furnace is a lined working chamber 1, equipped with a loading device 2 and a chimney 3. The bottom 4 of the furnace is made in the form of ridges, it has inclined tuyeres 5 for supplying fuel and air and moving the materials to be processed. The bottom has b pockets, each of which contains receiving funnels 7 to release the inter-ridge space from the remnants of the Materials being processed. In the opposite end of the furnace loading end, there is a re-recovery chamber 8, in the lower part of which there is a discharge unit. The unloading assembly consists of a fixed grille 9 of the movable carriage 10, on the platform of which slits 11 are made for passage of ore into sump 12. In the lower part of the resetting chamber, a speculator is installed, consisting of a row of rods 13, passing through the walls of the chamber and resting on rollers 14. Each rod consists of several water-cooled pipes of 15 square section, welded to each other, with rippers fixed to them 16. In places of passage of the rod through the chamber walls a seal 17 is installed. In addition, the rod is connected to the drive 18, when giving them she reciprocates. Spektolomatoel rods are cooled with water. The furnace works as follows. The material to be processed (iron ore with some addition of a stone of Nogo coal) enters the furnace through the charging device 2 and falls into the area of action of gas jets. The ore particles are moved by jets flowing out of the oblique shapes installed in the furnace hearth and moved in a suspended state to the re-reduction chamber 8 located in the discharge end. When the refurbishment chamber is filled with ore, the slits of the fixed grate 9 are covered by a movable carriage. In this chamber, the ore is terminated by direct contact with coal at a temperature of 800-1 and its level is kept constant. , To unload the recovered ore, the movable carriage is shifted so that its gaps coincide with the gaps of the fixed grate or with the gaps between the spelematol bars (Fig. 3). forward movements towards each other, using rippers prevent the formation of cakes. Passing the furnace discharge unit, the ore enters the sump 12 and is then transported for further processing. The use of the spele matte of the proposed construction allows for an increase in the productivity of the furnace and the elimination of heavy physical labor in the destruction of the specs. Using the invention, the furnace downtime is reduced from 5,138 to 2,225 hours per year. The increase in annual production at the same time increases from 243.7 to 535.0 thousand tons.

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Claims (1)

OVEN FOR THERMAL PROCESSING OF BULK MATERIALS, containing a working chamber, a comb comb with inclined tuyeres, devices for loading and unloading material, a chimney and a water-cooled speculum with cultivators, characterized in that, in order to increase the productivity of the furnace, the speculum is made of triangular shaped rods with the possibility of reciprocating motion along the longitudinal axis towards one psugu. ,> t