SU379657A1 - ALL-UNION !! - Google Patents

Description

one

The invention relates to the field of non-ferrous metallurgy and is intended for the processing of sulphide materials.

A furnace for oxygen-suspension smelting is known, which includes masonry, hearth, gas duct and oxygen / oxygen burner.

When operating such a furnace, there is a high dust content of the material with exhaust gases, reaching 200-300 g / nm. The high dust content of the waste gases makes it difficult to operate the devices for heat recovery and gas cleaning, and also reduces the capacity of the furnace.

The proposed furnace provides a significant reduction in the dust content of waste gases, which allows improving the technical and economic performance of the furnace.

A feature of the furnace is that an oxygen-burning burner at a height above the melt portion of the bottom is inclined to install a cooled recirculation head, made in the form of a hollow truncated cone, and a gas duct is located above the recirculation head.

The drawing shows a furnace, a general view.

The furnace includes a clutch 1, a subtype 2, a raised section 3 of the bottom, a gas flue 4, a wet oxygen burner 5, a recirculation head 6 and a bath 7.

The oven works as follows.

The mixture and oxygen through an oxygen-oxygen torch 5 is blown into the furnace. The resulting oxygen-charge torch enters the recirculation head 6, into which also high-temperature gases are sucked in by ejection. Gas suction allows to quickly preheat the charge and the blast and, consequently, increase the melting rate.

In a limited volume of the recirculation head, the oxygen – flame plume collides with its walls, the molten charge particles coagulate into large droplets, which fall onto the bath surface 7. Melt coagulation dramatically reduces dust removal, which facilitates the operation of the recovery boiler and gas cleaning system and generally improves technical and economic performance of the furnace. A further reduction of dust removal is achieved by positioning the gas flue 4 at the front wall of the furnace, directly above the recirculation head 6.

Subject invention

The furnace for oxygen-ignition melting, which includes an oxygen-oxygen burner, a clutch, a hearth and a gas flue, is characterized in that, in order to increase productivity and reduce dust removal, the oxygen-oxygen furnace at an elevation above the melt level has a slopingly mounted cooling recycle head, as a hollow truncated cone, with a flue located above the recirculation head.