SU1247637A1 - Shaft furnace for heating and roasting ferroalloys - Google Patents

Description

The invention relates to shaft furnaces and can be used in the chemical and metallurgical industries, in particular, to heat up metered portions of ferroalloys before feeding them into the ladle with molten metal.

.. The purpose of the invention is to reduce the time n.9gre, va ferroalloys, fuel consumption and dust emissions into the atmosphere. ., FIG. 1 shows the device, obscured; in Fig.11; - section A-A on gfig g 1.

Ш) for heating and heating, ndd, spherical alloys. Contains heating chamber 1 G with gas burners 2 installed around the perimeter of the furnace, charging device 3, heating chamber 4 equipped with radiation recuperators - cyclones 5, radially connected smoke channels 6 with a heating chamber 4, in the bottom part of which gas permeable partitions 7 are installed at an angle equal to the angle of repose of the feed material.

Shaft furnace works as follows.

Ferroalloys in a special self-unloading container are fed to the furnace and

BUT

through the charging device 3 enter the heating chamber 4, where the drying and calcination of ferroalloys with flue gases, which are sucked through the charge in the heating chamber 4 and gas-permeable partitions 7, smoke channels 6, due to the discharge generated by the exhaust fan behind the recuperators - cyclones 5. The air heated in the recuperator 5, feed to the burners 2 installed in the upper part of the combustion chamber 1. In the recuperator-cyclone 5, the flue gases are partially cleaned from dust. The unloading of the ferroalloys is dried periodically through the flip bottom 8 into containers.

The presence of gas-permeable partitions in the heating chamber, installed at an angle of repose of the loaded materials, does not allow the material to pour out of the chamber and does not prevent sucking

20

flue gas.

The use of the proposed invention in comparison with the known ones will allow to intensify the process of drying, heating and calcining ferroalloys, shorten the drying time, will allow 25 partial purification of flue gases from dust.

Hot air

2

Compiled by N. / Khseeva

Editor A. DolinichTechred I. VeresKorrektor G. Reshetnik

Order 4108/37 Circulation 561 Subscription

VNIIPI USSR State Committee

Inventions and discoveries

113035, Moscow, Zh-35, Raushsk nab. 4/5

Branch PPP "Patent, Uzhgorod, st. Project, 4

Claims (1)

A MINE FURNACE FOR HEATING AND PUNCHING FERROALLOYS, containing a heating chamber with gas burners, a loading and unloading device, and a smoke extraction device, characterized in that, in order to reduce the heating time of ferroalloys, fuel consumption and dust emissions into the atmosphere, it is equipped with a chamber installed in the bottom of the chamber heating the annular gas-permeable partition at an angle equal to the angle of repose of the loaded material, and the smoke exhaust device is made in the form of rational cyclone recuperators, Connections radial channels with the heating chamber at the annular gas-permeable partition, wherein the gas burner mounted tangentially on the perimeter of the heating chamber. To the exhaust fan Hot air Cold air Λ 1 1 41 = - = | 1· burnt Kdynososu Hot cart Cold air 0.00 B floor SU ... 1247637 (rig. 1