SU52240A1 - Mnogopopov furnace for burning of flotation tails of sulfur pyrite - Google Patents

Description

Factory-installed multiple-base kilns for burning pyrite tails usually have a large number of metal parts located at high temperatures, which increases their exploitation costs, due to more or less frequent breakdowns of the paddles and the like, and generally complicated design of the furnaces.

In the proposed multi-hearth furnace, there are no metal parts located in the high-temperature zone, and the supply of the charge in series from the upper hearths to the lower ones is carried out under the influence of its own weight of the shaft, for which the furnace is made rocking.

The schematic drawing shows a vertical section of a multi-hearth kiln for the burning of flotation tailings of sulfur pyrite.

The metal frame in the furnace in the form of a rectangular parallelepiped, of appropriate sizes, has a lining / refractory brick inside. In a vertical section, the furnace has a number of hearths 2, which are also made of refractory bricks. The furnace is rocked by

teeth 3, By changing the angle of inclination, the productivity can also be changed accordingly; in addition, the latter depends on the number of pods and the change in the amount of fines being loaded.

From the hopper 4, the trifle wakes up on the drying ceiling of the furnace and, gradually moving to the opposite side, is poured into the feeder inserted into the hole 5. Once on the first upper sub 2, the pyritic trifle gradually moves to the opposite side and mixes all the time while moving. The mixing of fines is intensified by the presence of thresholds on the hearths, at certain distances x.

When it reaches the opposite side of the hearth, the trifle, pouring over the higher ledge 7, wakes up into the second under the hole 8, which is located behind the ledge. Subsequent movement is similar to the previous one; formed at the end of the calcine is poured into the bunker 9, and from there periodically removed into the trolley 10. Through the holes 7 with the registers, the air enters the furnace, passes the lower under and enters the overlying bottom through the pipe 12, the height of which exceeds the level of a quiver located on the floor, this eliminates the possibility of spilling fines through the gas port opening. The gas can pass through the pyrite hole 5, but its quantity will be insignificant.

The gas flow, the passage to meet the burning pyritic fines, goes to the upper hearth and to the outlet, from where it comes to be called.

The connection of the rocking nipple 13 on the furnace lid with a fixed gas collector is achieved by means of a sand gate, the level of sand in which is quite high, so that the edges of the gate bell cannot exit the sand. Instead of sand, high boiling liquids can be used. To observe the burning and to clean the holes 8, there are holes 14 with doors in each floor above the bottom. From the bottom of the furnace, in the middle, a row of support plates is installed, through which the shaft passes, tightly fastened with a tongue. The ends of the shaft resting on the sub-pliers. To one of

the shaft ends are attached to a system of gears 3, with which the furnace is driven to swing.

Due to the protrusion 7 on each hearth there will always be a certain amount of burning fines.

The number of oscillations of the furnace with a small angle of inclination is about three, four per minute. First of all, the most burnt-out pyrite will fall on the next one, since during the next swing it will be closest to hole 8.

The apertures 8 for sprinkling pyritic fines are limited on the side of the grip 15, as a result of which the dust formation during the spilling of pyrite decreases.

The subject matter of the invention.

A multi-peel kiln for flotation of sulfur pyrite flotation tails, characterized in that it is wobbled, in order to supply the charge sequentially from the upper hearths to the lower ones under the influence of its own weight of the charge.

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