SU55908A1 - Method and device for the combined production of yellow phosphorus and power gas - Google Patents

Description

As is known, carbon is required for the reduction of phosphorus in phosphorites at high temperatures in blast furnaces. In practice, the latter is used in the form of charcoal and coke. Of great interest is the use of peat and coal as a reductant in the blast furnace. However, when working on the latter, the resulting resins react with the reduced phosphorus, converting it in large quantities to hydrogen phosphorous.

To eliminate this drawback, according to the present invention, peat coke, necessary for the recovery of phosphorites, is proposed to be obtained by ironing peat in a stream of hot gas mixture: blast furnace, liberated in a known manner from phosphorus vapors, and svelgas released from resin vapors, heated in a cooper .

To accomplish this method, an apparatus is proposed which consists (see drawing) of the sweatshirt /, metal for recovery of phosphorite 5, centrifugal dust collector 6 with pneumatic feeding of dust into the kiln, peat hopper or coal 5 of phosphate hopper 7.

Peat or coal from bunker 8 enters Schwelschert J. Inside Schwelshacht, a cone 9 is arranged in the form of a lattice (made of iron, cast iron, chamotte or other material) with holes (slits) through which the material easily moves down. Under these openings, the gas J20 heated to 500-700, consisting of a mixture of blast-furnace gas and shwelgase, freed from phosphorus and resin vapors, which passes through the hole 9 under the arrows along the arrows, passes through the J2 nozzle through coal), coking production last. The resulting decomposition products of the resin and the decomposition water are discharged through the umbrella 13 and the pipe 14 through the pipe into the hydraulics 16. Here the heavy fractions of the resin are separated, after which the gas for more refined cleaning of the lightly boiling fractions is directed to the electrostatic precipitator 40 through an appropriate cooler / 7 and then with the help of an exhauster in a gasholder. The peat (coal) coked on the grate 9 is poured onto a similarly arranged grate 3, through the openings of which cold gas flows from the gas-holder 20, which takes away heat from the produced coke.

while heating itself, it follows through the funnel 4 and the pipe 15 to the Cooper 23 (it is possible to work also without cooling.)

The coke cooled by the described method with the help of a horizontally moving mechanism 27 is poured into the shaft 5, to which at the same time the required amount of phosphate from the bunker 7 is added using a screw conveyor.

The gas, heated by the physical heat of the coke, is partially combusted in the furnace 22 and is directed through pipe 2 to dry the material being coked. For this purpose, a lattice with slots is arranged in the bunker 8, in which peat is easily poured down, and hot gases with a temperature of 250 ° pass through the entire thickness of the material, take away hygroscopic moisture from it and emit it into the atmosphere with the help of a fan 35.

Another part enters the Cooper 23 and is heated through the heat exchange surface due to the heat of combustion of the gas in the furnace 22. It is also possible to use a heat exchanger for this, operating on the principle of a heat exchanger.

The gas, heated in Cowper 23, goes through the heat-insulated main through nafpybok 12 to the ground. The mixture obtained as indicated above (coke-f + phosphorite) descends to the region of tuyeres 28, through which a mixture of oxygen and air is blown. As a result of the reduction, phosphorus is formed, and the gas, consisting mainly of CO and nitrogen, is removed from the furnace through pipe 29. From here, the gas enters the centrifugal dust separator 6, which consists of a rapidly rotating (1500-3000 rpm) drum with many holes connected to the horizontal shaft of the motor. The meeting of a rotating drum, dust, under the influence of centrifugal force, falls from the periphery and falls into the hopper 32. Dust-free gas passes through the holes in the interior of the drum and then is directed to a phosphorus trap condenser. Dust from hopper 32 through the pipeline

pneumatically sucked by oxygen-enriched blast through tuyeres in the furnace furnace 33. The top dust can be used for averaging HLWF, obtained by burning phosphorus, since it contains only about 7 / o half oxides or PgOs. In this way, the full possibility of dust disposal is presented. Condenser 34 occurs (due to the splashing of water, phosphorus condensation. Next, the gas is cleaned of pH and the phosphorus traces of nitric acid in a liner 35 with a quartz nozzle, then rinsed in an alkali scrubber 36 and, cleaned, goes to the gas tank 20, from where part goes to the ironing pipe 2i, the other part is for gas supply.

The subject matter of the invention.

1. A method for the combined production of yellow phosphorus and power gas by treating phosphorites in an oxygen blast furnace, characterized in that the peat coke, necessary for the recovery of phosphorites, is produced by beveling peat in a stream of hot gas mixture: blast furnace, freed in a known manner from phosphorus vapors, and shwelgaz, released from resin vapors, heated in a cowper.

2. Acceptance of the method according to p. 1, cast by cooling the peat coke with a mixture of blast-furnace and shwelgaz, before directing the latter to the phosphorus blast sublimation process, and flue gases from the cooper are used to dry the raw peat in the upper part of the Schwelschacht.

3. A device for performing the method according to claims. I and 2, characterized by the combined use of a blast furnace for the sublimation of phosphorus and a shaft furnace for peveling located above it in a stream of hot blast furnace and shvelgazov. to the author's testimony I. I. 55908 S. Rosenkrantz

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