SU769265A1 - Vortex apparatus treatment of loose materials - Google Patents

Description

The invention relates to the field of reductive and oxidative roasting, as well as the drying and thermochemical treatment of bulk materials, in particular, for the recovery of ores of ferrous and non-ferrous metals in a suspended state, and can be used in ferrous and nonferrous metallurgy. chemical, cement and building industries and in agriculture. YU

A known shaft furnace for direct reduction of dust-like iron ores with a tangential supply of gases through nozzles installed along the chords of the mine in several rows in its various horizons, 15, the nozzles of each next row in the vertical are directed opposite to the nozzles of the previous row, having food bunker and discharge bunker and dust collector j .20

The disadvantage of the furnace is EP; large, compared with the required for processing, gas consumption for the creation of a vortex insulated from the walls, inevitable occurrence of parasitic

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traumatic streams of removal of the processed material into the finished product, the absence of a countercurrent treatment of the material and, as a result of all this, the productivity of the finished product is low and the efficiency of the processing process is low.

The closest solution is a heat treatment apparatus for finely dispersed material in countercurrent with heat carrier, containing a vertical chamber of a number of conical retorts with conical inset mounted vertical inserts, upper loading devices, lower estrus for unloading material and. pipe for supplying coolant m 2.

The disadvantage of this apparatus is the high gas consumption, due to the impracticability of adjusting its feeds in comparison with the material required for processing the material, which reduces the productivity of the finished product.

Group 1 of the present invention is to reduce the consumption per hour and to increase the processing efficiency of bulk materials.

 This goal is achieved by the fact that a vortex apparatus for processing bulk material contains a vertical chamber of a series of conical retorts, inside which gas discharge chambers made in the form of straight truncated cones, loading and unloading devices and gas outlet, are located coaxially. equipped with a pre-treatment chamber in which the gas outlet is placed; conical retorts are equipped with tangential nozzles to supply coolant, and each gas discharge chamber is arranged to form in its lower base an annular exhaust gas channel that connects it to the gas outlet, which in its upper part is equipped with tangential nozzles to feed waste gases into the pretreatment chamber.

The invention is illustrated in the drawing, which shows in section a general view of a vortex apparatus for treating bulk material. ; The swirling apparatus for treating whey: a bundle of material has a feed device in the form of a feed hopper, a pretreatment chamber 2: working chambers 3 in the form of conical I retorts with tangential nozzles 4, chambers, gas discharge 5, with annular exhaust ducts 6 , internal bunker 8, gas outlet 9 with tangential nozzles 10 exhaust pipe 11 and exhaust valve 12.

Vortex apparatus for processing bulk material is as follows. The source material is fed into the vortex apparatus through the hermetic feed hopper 1 and enters the precautionary measure 2. Here, under the pressure of the exhaust gases coming from the gas outlet 9 through the tangential nozzles 10, the material is twisted by a gas flow and is pre-processed. Further, the material under the force of gravity passes into the upper working chamber 3, where it is twisted and processed by a vortex gas flow entering through the tangential nozzle 4. Here, under the action of centrifugal forces, the material is thrown to the outer conical wall of the working chamber 3.

Depending on the rate of movement of the gas, particles of the material can move up or down the outer wall of the chamber, or make vortex movements in the same horizontal plane. thereby changing the processing time of the materials. From the upper working chamber, the material enters the underlying working chamber, where; it enters the counter, relative to the upper, vortex flow of fresh gas. At this moment, there is a sharp change in the velocity of the vortex motion of the material on the opposite and c. particle surfaces. The reaction products are intensively removed. In the next working chamber, the process is repeated, and from the lower chamber the finished product flows through the discharge device 7 into a sealed bunker (not shown in Fig.). Exhaust gases and gaseous reaction products from working chambers 3 through annular gas exhaust ducts 6 enter gas discharge chambers 5, where, due to a sharp expansion of the cross section, the gas velocity decreases and churned particles of the finished product fall out from it. Located at the top of the gas outlet 9, the exhaust channel 12 allows the gas pressure in the pretreatment chamber of the material 2 to be adjusted.

Reducing the effect of gas consumption on the material processing process is achieved by forming each discharge chamber in its lower base with an annular gas exhaust duct that connects it to the gas outlet, and supplying working chambers with tangential nozzles to supply coolant with adjustable speed, and using tangential nozzles, communicating the gas outlet with the pretreatment chamber, allows utilizing the thermal and chemical energy of the exhaust gases.

The use of a vortex apparatus for treating bulk material improves the efficiency and productivity of the process of thermochemical processing of materials and improves the quality of the finished product.

Claims (2)

1. The author's certificate of the CPC number 52242, class, F 27 In 15/00, 1933. 2. USSR author's certificate K 458698, cl. Р 27 В 15/00, 1971 / prototype /. ..