SU40573A1 - Suspended multi-furnace mechanical kiln for sulphide ores in suspension - Google Patents

Description

The existing multi-shelf mechanical kilns for calcining sulphide ores in the exploded state have a relatively low productivity, do not give a sufficiently complete burnout of sulfur from the calcined material, and also contain very small amounts of sulfur dioxide (SOj) in the calcined gases.

To eliminate these drawbacks, the proposed multi-shelf kiln is equipped with ONLY upper and lower shelves, and the middle part of the vertical hollow space of the kiln is used to burn suspended ore in a suspended state, and pockets with air nozzles in the upper and lower shelves serve to spray the ore.

In FIG. 1 depicts a multi-shelf mechanical oven proposed in a longitudinal section; FIG. 2, 3 - the same in cross section and FIG. 4- modification of the furnace in cross section.

The proposed multi-shelf mechanical kiln for burning sulphide ores in a suspended state consists of upper POLOCK / 2, M, used for drying and heating the ore, and lower shelves 2 /, 2-4, serving for additional burnup from sulfur ore.

For burning the ore, there is a space between the upper and lower shelves. Located in the upper and lower floors (419)

Kakha pockets / b with air nozzles 7 are designed for spraying ore. The scrapers / 3 and 15 serve to move the ore, and the scrapers 25 to remove the cinder. Air nozzles 22 are designed to preheat the bottom

SHOT

The ore from the silo U is fed to the shelf / 2 through the feeder / 7, where it is dried up and scraped onto the shelf J4 by the scrapers / 5. Ore entering the high temperature zone is heated by scrapers 15 to pockets J6, at the bottom of which air nozzles 17 are located, which are ejection tubes J /, in the conical part of which tube 32 is installed, through which compressed air is supplied, , due to the fact that the tube 32 partially passes in the hot zone of the furnace, the air entering the tube 32 from the ring J8 is heated. The ore entering the pocket 16 is sucked in by the ejection pipe 31, then sprayed with compressed air and blown into the working space of the furnace, where the sulfur burns out. Air nozzles 17 are installed in pockets in such a way that the ore particles receive a vortex motion, which increases the residence time of a part of the ore in suspension. For the same purpose, as well as to build secondary air, additional nozzles 20 are installed around the periphery of the furnace;