SU658384A1 - Drum-type rotary furnace firebox - Google Patents

Description

{54) DRUM-ROTATED TOP FURNACE

one

The invention relates to the field of non-ferrous metallurgy, in particular, to furnaces installed on rotary Oarabany type furnaces for heat treatment, such as drying or roasting, ores and concentrates of non-ferrous metals.

A device for a burning furnace of a rotary kiln is known, which consists of a cylindrical chamber with an annular channel between the outer and inner walls, nozzles located along the perimeter of the inner wall, a front wall with a cylinder-concave abrasure and a burner. The front wall is provided with a lining, the thickness of which is determined by the depth of the burner embrasure and reaches 500-700 mm. The burner adjoins the front wall, the nozzle of which is directed to the mouth of the burner embrasure ij.

However, such a firebox has low operational reliability. This is due to the fact that the inner and outer surfaces of the front wall, the thickness of which reaches 500-700 mm, are unevenly heated and as a result of various thermal expansion of the lining of the front wall are destroyed.

In addition, instead of adjoining the furnace to the furnace, it is not sufficiently cooled, which also determines its low operational reliability, in particular, frequent stopping of the furnace for repair.

The aim of the invention is to reduce the number of stoppages of the firebox for repairs due to the increase in operating speed on the hedgehog.

This is achieved by the fact that the front erosion is made in the form of a hollow truncated cone, between the outer and inner walls of which an annular channel is made, which communicates with the annular channel KHMep j of the firebox.

The drawing shows a furnace in longitudinal section, a general view.

The furnace consists of a chamber 1, an outer wall 2, an inner wall 3, an annular channel 4, end nozzles 5, front nozzles 6, a burner 7, lining of the front wall 8, a hollow truncated cone 9, a cylindrical protrusion 10, an annular channel of the front wall I ; lining cal} er.12 air inlet 13.

The firebox wall is made in the form of a hollow truncated cone 9 and adjoins