SU61306A1 - Furnace for the chlorination of magnesium oxide - Google Patents

Description

In auth. St. No. 55389 describes a method for the chlorination of magnesium oxide, which consists in that, in order to reduce the burning of the coke head of an electric furnace, the chlorine air mixture blown into the reaction space takes away the free oxygen by pre-spraying oil in the hot mixture, and the furnace must be provided with a hole , a vault, to which the coke nozzle and a bale are placed, and a receiver for the resulting magnesium chloride should be placed under this vault, through the openings of which magnesium chloride flows into the receiver (hopper).

The proposed magnesium oxide chlorination furnace is an improvement described in the main application and differs in that a separate electrically heated and filled with lump coke chamber is used to prepare the chlorine air mixture, which communicates with a wall for chlorination with side nozzles in its masonry. Such a remote chamber can be made common to two or more tongues and is positioned so that part of the perimeter of the walls of the shafts and the remote chamber is common.

FIG. 1 shows a single furnace; in fig. 2 and 3 - double furnace in the cuts; in fig. 4 and 5 - three-shaft furnace in the cuts.

In the first form of implementation (Fng. 1), the furnace is one vertical bench 1, tapering slightly upwards — such a shape is necessary to prevent the hovering from hanging. On top of this, the shaft has a loading opening 2 and a viewing opening for suctioning gases. In the lower part of the shaft, there is a supporting charge of a concrete gadfly 3 with holes, and a digger 4 is located under the roof for flowing magnesium chloride through the holes. Above the roof there is a hatch for cleaning the furnace from the slag. The digger 4 is supplied in the Npzh: drink part of D15um with openings for the release of magnesium chloride and for the cleaning of the digger

No. 61306

from the sludge as it “accumulates. At the bottom of the furnace, a capillary in a part of its perimeter is surrounded by a remote chamber 5 filled with a coke nozzle, which lies on a lattice chamotte bottom 6. Under bottom b there is an ash pit 7 with a hole in the wall for cleaning, which is buried during the furnace operation. Through the ashpot, the chlorine-air mixture is supplied to chamber 5. Chamber 5 is closed from above with stove 8 with hermetically closed hatches 9 for adding coke or coal.

In the side of chamber 5, nozzles for supplying oil or fuel oil and a chlorine-air mixture are placed on the side. The chlorine air mixture can be fed from the bottom and side of the nozzle. Under the level of the plates 8 and roof 3 from chamber 5, channels 10 (nozzles) were made into chamber 4, through which chlorine, having passed through the nozzle of chamber 5, enters the mine / through a perforated arch 3. In addition, chlorine can pass into the mine, mine , through the sinks located along the perimeter of the well, the annular channel J2 and the apertures 13. The nozzle in the chamber 5 is heated by two electrodes 14 located from the ends of the chamber. The laying of the furnace is made of. fireclay bricks; a layer of dolomite or magnesite backfill is placed behind the fireclay masonry / 5. The furnace is sheathed with an iron jacket 16.

The double shaft furnace (Figs. 2 and 3) consists of two circular shafts 17 and J8 connected in series or parallel during operation (the serial connection is shown, used to make better use of hydrochloric acid). The coal nozzle is placed in a remote chamber 19, which is common to the mines 17 and 18. The mixture in the mines 17 and 18 lies on a solid bottom. In the bypass chamber, the coke nozzle lies on a perforated bottom 20 located above the ashpit 21. Through the ashpit, equipped with a cleaning hatch 22 (sealed for operation time), the chlorine air mixture is fed into the chamber 19. Oil enters this chamber through the nozzles 23. Inlet chamber 19 closed by a stove 24 with hermetically closed hatches 25, chlorine-air. The mixture enters through channels 26 into shaft 17, from there through connecting pipe 27 it enters the space between spaces 28, from which channels 29 are directed into shaft 18. From mine 18 the formed gases, containing hydrochloric acid is discharged through the channel 30 of the upper part of the shaft. Mines 17 and 18 are closed with plates 31 with loading hatches 32 and viewing hatches 33. Channels 34 are provided for draining the magnesium chloride formed in mines 17 and 18. By this, magnesium chloride enters the accumulator 35, separated from the mine space 28 by slab 36. Each mine is provided hatch 37 for cleaning, embedded on the time of operation of the furnace. To heat the nozzle in the remote chamber 19, the electrodes 38 serve. The same electrodes 39 are also placed in the piggy 35. The digger is equipped with a siphon 40 and letchy 41 for the release of the finished product. When the mines 17 and 18 are connected in series, the chlorination process in the first mine follows this scheme:

a) AlgO -f C + Cla AlgCU CO,

b) MgO + CO + Cla MgClo + COA; in the second mine:

MgO + 2HC1 MgCI, -4- NgO.

The three-shaft furnace (Figs. 4 and 5) consists of three vertical shafts 42, 43 and 44 of circular cross section, connected below in parallel by channels 45 through a common external chamber 46 filled with a coal or coke nozzle. At the top of the shaft, the channels 47 are combined into a common central chamber 48, through which the pipe 49 passes.

for loading the material to be chlorinated. The chamber 48 is provided with a suction pipe 50. The remote chamber 46 is located between the shafts 42, 43 and 44 so that part of the perimeter of the walls of the shafts and the remote chamber is common. The remote chamber is blocked by a stove 51 with hatches 52 serving to load the nozzle and repair it. The air-chlorine mixture is introduced into chamber 46 from common pipe 53 through tuyeres 54. Oil is fed through nozzles 55. The attachment is lying on a perforated plate 56, under which is placed plate 57 separating chamber 46 from the accumulator 58. Magnesium chloride formed in mines 42, 43 and 44 flows down their inclined bottoms to copilpick 58 through the gap between the slab 57 and the edges of the bottom of the mines. Three electrodes 59 are symmetrically located in chamber 46 for heating the core by three-phase current. The other three electrodes 60 placed in the piggy 58 serve to maintain the porous magnesium in the molten state. The release of sump in the magnesium chloride tank is made through a siphon 61 and a tap 62.

Subject invention

Claims (2)

1. Mine electric furnace for implementing the method of magnesite chlorination according to the author. St. N ° 55389, characterized in that a separate, heated by electric current and filled with lump coke, a remote chamber communicating with the shaft for chlorination by lateral nozzles in the masonry bed was used to prepare the chlorine-air mixture. 2. The form of the furnace according to claim 1, wherein the external chamber is made common to two or more shafts and is located between the latter so that a part of the perimeter of the walls of the shafts and the external chamber is common. - 3 - № 61306 Ifi 15 J / vl fVu23 49